android全屏／沉浸式状态栏下，各种键盘挡住输入框解决办法[转]

2023-12-25 09:59
文章标签 android 键盘 解决办法 全屏 状态栏 输入框 沉浸 挡住

本文主要是介绍android全屏／沉浸式状态栏下，各种键盘挡住输入框解决办法[转]，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

转自http://www.voidcn.com/article/p-gcncfbun-bqh.html

*本篇文章已授权微信公众号 guolin_blog （郭霖）独家发布

在开发中，经常会遇到键盘挡住输入框的情况，比如登录界面或注册界面，弹出的软键盘把登录或注册按钮挡住了，用户必须把软键盘收起，才能点击相应按钮，这样的用户体验非常不好。像微信则直接把登录按钮做在输入框的上面，但有很多情况下，这经常满足不了需求。同时如果输入框特别多的情况下，点击输入时，当前输入框没被挡住，但是当前输入框下面的输入框却无法获取焦点，必须先把键盘收起，再去获取下面输入框焦点，这样用户体验也非常不好，那有什么办法呢？ 
系统的adjustResize和adjustPan有什么区别，他们使用时的注意事项，有什么系统要求及蔽端呢？

下面对几种在开发中常用的方法进行总结：

方法一：非透明状态栏下使用adjustResize和adjustPan，或是透明状态栏下使用fitsSystemWindows=true属性

主要实现方法： 
在AndroidManifest.xml对应的Activity里添加 
android:windowSoftInputMode=”adjustPan”或是android:windowSoftInputMode=”adjustResize”属性 
这两种属性的区别，官方的解释是： 
这里写图片描述

这两个属性作用都是为了调整界面使键盘不挡住输入框 ，我这里对这两种属性使用场景、优缺点、注意事项进行了全方面总结，不知大家平时使用时是否注意到了。

属性注意事项优缺点失效情况适用情况
adjustResize需要界面本身可调整尺寸，
如在布局添加ScrollView，或输入控件属于RecycleView/ListView某一项		优点：1.不会把标题栏顶出当前布局；
2.有多项输入时，当前输入框下面的输入框可上下滑动输入 
缺点：1.需要界面本身可调整尺寸;
2. 全屏时失效		1.Activity主窗口尺寸无法调整；
2.Activity全屏
3.android5.0以上通过style设置沉浸式状态栏模式而不设置fitSystemWindow为true		非全屏或是非沉浸式状态栏输入界面，输入框比较多
adjustPan页面不会重新布局，当前输入框和键盘会直接将当前输入框以上界面整体向上平移，这样即使界面包含标题栏，也会被顶上去优点： 使用简单，不需要界面本身可调整尺寸，不会有失效情况 
缺点： 会把标题栏顶出当前布局；有多项输入时，当前输入框下面的输入框无法输入，必须收起键盘显示输入框再输入		无有少量输入项，且输入量居界面上方
fitsSystemWindows如果多个View设置了fitsSystemWindows=”true”,只有初始的view起作用，都是从第一个设置了fitsSystemWindows的view开始计算padding优点：使用简单，需要沉浸式状态栏的界面，不需要自己计算padding状态栏的高度 
缺点：使用有限制		1.View 的其他 padding 值被重新改写了
2.手机系统版本>=android 4.4		1.界面全屏
2.设置界面主题为沉浸式状态栏
  • adjustResize失效情况：activity设置了全屏属性指Theme.Light.NotittleBar.Fullscreen(键盘弹起时会将标题栏也推上去)或者设置了activity对应的主题中android:windowTranslucentStatus属性，设置方式为：android:windowTranslucentStatus=true，这时如果对应的页面上含有输入框，将会导致点击输入框时软键盘弹出后键盘覆盖输入框，导致输入框看不见。
  • fitsSystemWindows=”true”,只有初始的view起作用：如果在布局中不是最外层控件设置fitsSystemWindows=”true”, 那么设置的那个控件高度会多出一个状态栏高度。若有多个view设置了，因第一个view已经消耗掉insect，其他view设置了也会被系统忽略。

假设原始界面是一个LinearLayout包含若干EditText,如下图所示，在分别使用两种属性时的表现。

这里写图片描述

1､adjustPan

整个界面向上平移，使输入框露出，它不会改变界面的布局；界面整体可用高度还是屏幕高度，这个可以通过下面的截图看出，如点击输入框6,输入框会被推到键盘上方，但输入框1被顶出去了，如果界面包含标题栏，也会被顶出去。

这里写图片描述

2､adjustResize

需要界面的高度是可变的，或者说Activity主窗口的尺寸是可以调整的，如果不能调整，则不会起作用。 
例如：Activity的xml布局中只有一个LinearLayout包含若干EditText,在Activity的AndroidMainfest.xml中设置android:windowSoftInputMode=”adjustResize”属性，点击输入框6, 发现软键盘挡住了输入框6,并没有调整，如下图所示：

这里写图片描述

但使用这两种属性，我们可以总结以下几点： 
1) 使用adjustPan, 如果需要输入的项比较多时，点击输入框，当前输入项会被顶到软键盘上方，但若当前输入框下面还有输入项时，却需要先收起键盘，再点击相应的输入项才能输入。这样操作太繁琐了，对于用户体验不大好； 
2) adjustResize的使用，需要界面本身可显示的窗口内容能调整，可结合scrollview使用；

方法二：在界面最外层布局包裹ScrollView

1､只使用ScrollView

在相应界面的xml布局中，最外层添加一个ScrollView，不在AndroidMainfest.xml中设置任何android:windowSoftInputMode属性，此时点击输入框，输入框均不会被软键盘档住。即使当前输入框下方也有输入框，在键盘显示的情况下，也可以通过上下滑动界面来输入，而不用先隐藏键盘，点击下方输入框，再显示键盘输入。 
我们可以根据Android Studio的Inspect Layout工具来查看界面真正占用的布局高度，工具在 
这里写图片描述

通过该工具，我们看到： 
界面真正能用的高度=屏幕高度-状态栏高度-软键盘高度 
界面中蓝框是真正界面所用的高度：

这里写图片描述

2､ScrollView+adjustPan

我们再在该类的AndroidMainfest.xml中设置windowSoftInputMode属性为adjustPan，

<span style="color:#000000"><span style="color:#000080"><<span style="color:#000080">activity</span> <span style="color:#008080">android:name</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">".TestInputActivity"</span></span></span><span style="color:#000080"><span style="color:#008080">android:windowSoftInputMode</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"adjustPan"</span></span></span><span style="color:#000080">></span></span>

发现当前输入框不会被挡住，但是输入框比较多时，在有键盘显示时，界面上下滑动，但只能滑动部分，且如果输入框在界面靠下方时，点击输入框，标题栏也会被顶出去，如下图所示： 
这里写图片描述

我们借助Inspect Layout工具查看此设置布局可用高度，从下图可以看出，此时布局可用高度是屏幕的高度，上下滑动也只是此屏的高度，在输入框9以下的输入框滑不出来，向上滑动，也只能滑到输入框1。 
这里写图片描述

3､ScrollView+adjustResize

我们前面说过adjustResize的使用必须界面布局高度是可变的，如最外层套个ScrollView或是界面可收缩的，才起作用。这里在该类的AndroidMainfest.xml中设置windowSoftInputMode属性为adjustResize，

<span style="color:#000000"><span style="color:#000080"><<span style="color:#000080">activity</span> <span style="color:#008080">android:name</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">".TestInputActivity"</span></span></span><span style="color:#000080"><span style="color:#008080">android:windowSoftInputMode</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"adjustResize"</span></span></span><span style="color:#000080">></span></span>

发现效果和1不设置任何windowSoftInputMode属性类似，其使用高度也是：屏幕高度-状态栏高度-软键盘高度 
这里写图片描述 
我们再来看看windowSoftInputMode默认属性值stateUnspecified: 
这里写图片描述 
可以看出，系统将选择合适的状态，也就是在界面最外层包含一层ScrollView时，设置默认属性值stateUnspecified其实就是adjustResize属性。

但以下两方面无法满足需求：

1) 当Activity设置成全屏fullscreen模式时或是使用沉浸式状态栏时，界面最外层包裹 ScrollView，当输入框超过一屏，当前输入框下面的输入框并不能上下滑动来输入，情况类似于ScrollView+adjustPan，只能滑动部分，通过Inspect Layout也可以看到，界面可用高度是整个屏幕高度，并不会进行调整高度。即使设置adjustResize，也不起作用。 
2) 如果是类似于注册界面或是登录界面，键盘会挡住输入框下面的登录按钮。

沉浸式状态栏／透明状态栏情况下

自android系统4.4(API>=19）就开始支持沉浸式状态栏，当使用觉System windows(系统窗口),显示系统一些属性和操作区域，如 最上方的状态及没有实体按键的最下方的虚拟导航栏。 
android:fitsSystemWindows=“true”会使得屏幕上的可布局空间位于状态栏下方与导航栏上方

方法三：使用scrollTo方法，当键盘弹起时，让界面整体上移；键盘收起，让界面整体下移

使用场景：针对界面全屏或是沉浸式状态栏，输入框不会被键盘遮挡。主要用于一些登录界面，或是需要把界面整体都顶上去的场景。

1､主要实现步骤：

(1) 获取Activity布局xml的最外层控件，如xml文件如下：

<span style="color:#000000"><span style="color:#000080"><<span style="color:#000080">RelativeLayout</span> <span style="color:#008080">xmlns:android</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"http://schemas.android.com/apk/res/android"</span></span></span><span style="color:#000080"><span style="color:#008080">xmlns:tools</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"http://schemas.android.com/tools"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_width</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"match_parent"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_height</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"match_parent"</span></span></span><span style="color:#000080"><span style="color:#008080">android:id</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@+id/main"</span></span></span><span style="color:#000080"><span style="color:#008080">tools:context</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"com.example.liubin1.softkeyboardhelper.MainActivity"</span></span></span><span style="color:#000080">></span><span style="color:#000080"><<span style="color:#000080">EditText</span><span style="color:#008080">android:id</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@+id/name"</span></span></span><span style="color:#000080"><span style="color:#008080">android:hint</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"请输入用户名："</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_centerInParent</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"true"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_width</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"match_parent"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_height</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"50dp"</span></span></span><span style="color:#000080">/></span><span style="color:#000080"><<span style="color:#000080">EditText</span><span style="color:#008080">android:id</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@+id/pas"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_below</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@id/name"</span></span></span><span style="color:#000080"><span style="color:#008080">android:hint</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"请输入密码："</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_centerInParent</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"true"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_width</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"match_parent"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_height</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"50dp"</span></span></span><span style="color:#000080">/></span><span style="color:#000080"><<span style="color:#000080">Button</span><span style="color:#008080">android:id</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@+id/login_btn"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_below</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"@id/rpas"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_centerHorizontal</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"true"</span></span></span><span style="color:#000080"><span style="color:#008080">android:text</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"登录"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_width</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"180dp"</span></span></span><span style="color:#000080"><span style="color:#008080">android:layout_height</span>=</span><span style="color:#219161"><span style="color:#000080"><span style="color:#219161">"50dp"</span></span></span><span style="color:#000080"> /></span>
<span style="color:#000080"></<span style="color:#000080">RelativeLayout</span>></span></span>

先获取到最外层控件

<span style="color:#000000"><span style="color:#19469d">RelativeLayout</span> main = (RelativeLayout) findViewById(R.id.main);</span>

(2) 获取到最后一个控件，如上面的xml文件，最后一个控件是Button

<span style="color:#000000"><span style="color:#19469d">Button</span> login_btn = (Button) findViewById(R.id.login_btn);</span>

(3) 给最外层控件和最后一个控件添加监听事件

<span style="color:#000000"><span style="color:#408080"><em><span style="color:#408080"><em>//在Activity的onCreate里添加如下方法</em></span></em></span>
addLayoutListener(main,login_btn);
<span style="color:#408080"><em><span style="color:#408080"><em>/** * addLayoutListener方法如下 *</em></span><span style="color:#408080"><em> @param</em></span><span style="color:#408080"><em> main 根布局 *</em></span><span style="color:#408080"><em> @param</em></span><span style="color:#408080"><em> scroll 需要显示的最下方View */</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">addLayoutListener</span></span><span style="color:#0000ff">(</span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">final</span></span></span><span style="color:#0000ff"> View main, </span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">final</span></span></span><span style="color:#0000ff"> View scroll)</span> {main.getViewTreeObserver().addOnGlobalLayoutListener(<span style="color:#954121"><span style="color:#954121">new</span></span> ViewTreeObserver.OnGlobalLayoutListener() {@Override<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">onGlobalLayout</span></span><span style="color:#0000ff">()</span> {Rect rect = <span style="color:#954121"><span style="color:#954121">new</span></span> Rect();<span style="color:#408080"><em><span style="color:#408080"><em>//1、获取main在窗体的可视区域</em></span></em></span>main.getWindowVisibleDisplayFrame(rect);<span style="color:#408080"><em><span style="color:#408080"><em>//2、获取main在窗体的不可视区域高度，在键盘没有弹起时，main.getRootView().getHeight()调节度应该和rect.bottom高度一样</em></span></em></span><span style="color:#954121"><span style="color:#954121">int</span></span> mainInvisibleHeight = main.getRootView().getHeight() - rect.bottom;<span style="color:#954121"><span style="color:#954121">int</span></span> screenHeight = main.getRootView().getHeight();<span style="color:#408080"><em><span style="color:#408080"><em>//屏幕高度</em></span></em></span><span style="color:#408080"><em><span style="color:#408080"><em>//3、不可见区域大于屏幕本身高度的1/4：说明键盘弹起了</em></span></em></span><span style="color:#954121"><span style="color:#954121">if</span></span> (mainInvisibleHeight > screenHeight / <span style="color:#40a070"><span style="color:#40a070">4</span></span>) {<span style="color:#954121"><span style="color:#954121">int</span></span>[] location = <span style="color:#954121"><span style="color:#954121">new</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span>[<span style="color:#40a070"><span style="color:#40a070">2</span></span>];scroll.getLocationInWindow(location);<span style="color:#408080"><em><span style="color:#408080"><em>// 4､获取Scroll的窗体坐标，算出main需要滚动的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">int</span></span> srollHeight = (location[<span style="color:#40a070"><span style="color:#40a070">1</span></span>] + scroll.getHeight()) - rect.bottom;<span style="color:#408080"><em><span style="color:#408080"><em>//5､让界面整体上移键盘的高度</em></span></em></span>main.scrollTo(<span style="color:#40a070"><span style="color:#40a070">0</span></span>, srollHeight);} <span style="color:#954121"><span style="color:#954121">else</span></span> {<span style="color:#408080"><em><span style="color:#408080"><em>//3、不可见区域小于屏幕高度1/4时,说明键盘隐藏了，把界面下移，移回到原有高度</em></span></em></span>main.scrollTo(<span style="color:#40a070"><span style="color:#40a070">0</span></span>, <span style="color:#40a070"><span style="color:#40a070">0</span></span>);}}});}
}</span>

2､实现原理：

此方法通过监听Activity最外层布局控件来检测软键盘是否弹出，然后去手动调用控件的scrollTo方法达到调整布局目的。

具体实现代码见demo中的LoginActivity类。

3､弊端：

此种方法需要在当前界面写比较多的代码，在某些手机上，若输入时，软键盘高度是可变的，如中英文切换，高度变化时，会发现适配的不大好。如下图： 
这里写图片描述 
从上图可以看出，如果键盘高度变化，键盘还是会挡住登录按钮。

方法四：适配键盘高度变化情况，当键盘弹起时，让界面整体上移；键盘收起，让界面整体下移

此方法主要是通过在需要移动的控件外套一层scrollView，同时最布局最外层使用自定义view监听键盘弹出状态，计算键盘高度，再进行计算需要移动的位置，这个和方法三有点类似，但能适配键盘高度变化情况。

实现步骤

(1) 先写自定义View，实时临听界面键盘弹起状态，计算键盘高度

<span style="color:#000000"><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#445588"><strong><span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">class</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>KeyboardLayout</strong></span></strong></span></strong></span> <span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">extends</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>FrameLayout</strong></span></strong></span></strong></span> {</strong></span><span style="color:#954121"><span style="color:#954121">private</span></span> KeyboardLayoutListener mListener;<span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">boolean</span></span> mIsKeyboardActive = <span style="color:#954121"><span style="color:#954121">false</span></span>; <span style="color:#408080"><em><span style="color:#408080"><em>//输入法是否激活</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> mKeyboardHeight = <span style="color:#40a070"><span style="color:#40a070">0</span></span>; <span style="color:#408080"><em><span style="color:#408080"><em>// 输入法高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#19469d"><span style="color:#19469d">KeyboardLayout</span></span><span style="color:#0000ff">(Context context)</span> {<span style="color:#954121"><span style="color:#954121">this</span></span>(context, <span style="color:#954121"><span style="color:#954121">null</span></span>, <span style="color:#40a070"><span style="color:#40a070">0</span></span>);}<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#19469d"><span style="color:#19469d">KeyboardLayout</span></span><span style="color:#0000ff">(Context context, AttributeSet attrs)</span> {<span style="color:#954121"><span style="color:#954121">this</span></span>(context, attrs, <span style="color:#40a070"><span style="color:#40a070">0</span></span>);}<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#19469d"><span style="color:#19469d">KeyboardLayout</span></span><span style="color:#0000ff">(Context context, AttributeSet attrs, </span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">int</span></span></span><span style="color:#0000ff"> defStyleAttr)</span> {<span style="color:#954121"><span style="color:#954121">super</span></span>(context, attrs, defStyleAttr);<span style="color:#408080"><em><span style="color:#408080"><em>// 监听布局变化</em></span></em></span>getViewTreeObserver().addOnGlobalLayoutListener(<span style="color:#954121"><span style="color:#954121">new</span></span> KeyboardOnGlobalChangeListener());}<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">setKeyboardListener</span></span><span style="color:#0000ff">(KeyboardLayoutListener listener)</span> {mListener = listener;}<span style="color:#954121"><span style="color:#954121">public</span></span> KeyboardLayoutListener <span style="color:#19469d"><span style="color:#19469d">getKeyboardListener</span></span><span style="color:#0000ff">()</span> {<span style="color:#954121"><span style="color:#954121">return</span></span> mListener;}<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">boolean</span></span> <span style="color:#19469d"><span style="color:#19469d">isKeyboardActive</span></span><span style="color:#0000ff">()</span> {<span style="color:#954121"><span style="color:#954121">return</span></span> mIsKeyboardActive;}<span style="color:#408080"><em><span style="color:#408080"><em>/** * 获取输入法高度 * *</em></span><span style="color:#408080"><em> @return</em></span><span style="color:#408080"><em> */</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> <span style="color:#19469d"><span style="color:#19469d">getKeyboardHeight</span></span><span style="color:#0000ff">()</span> {<span style="color:#954121"><span style="color:#954121">return</span></span> mKeyboardHeight;}<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#445588"><strong><span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">interface</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>KeyboardLayoutListener</strong></span></strong></span></strong></span> {</strong></span><span style="color:#408080"><em><span style="color:#408080"><em>/** *</em></span><span style="color:#408080"><em> @param</em></span><span style="color:#408080"><em> isActive 输入法是否激活 *</em></span><span style="color:#408080"><em> @param</em></span><span style="color:#408080"><em> keyboardHeight 输入法面板高度 */</em></span></em></span><span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d">onKeyboardStateChanged</span><span style="color:#0000ff">(</span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">boolean</span></span></span><span style="color:#0000ff"> isActive, </span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">int</span></span></span><span style="color:#0000ff"> keyboardHeight)</span>;}<span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#445588"><strong><span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">class</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>KeyboardOnGlobalChangeListener</strong></span></strong></span></strong></span> <span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">implements</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>ViewTreeObserver</strong></span></strong></span></strong></span><span style="color:#445588"><strong>.</strong></span><span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>OnGlobalLayoutListener</strong></span></strong></span></strong></span> {</strong></span><span style="color:#954121"><span style="color:#954121">int</span></span> mScreenHeight = <span style="color:#40a070"><span style="color:#40a070">0</span></span>;<span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> <span style="color:#19469d"><span style="color:#19469d">getScreenHeight</span></span><span style="color:#0000ff">()</span> {<span style="color:#954121"><span style="color:#954121">if</span></span> (mScreenHeight > <span style="color:#40a070"><span style="color:#40a070">0</span></span>) {<span style="color:#954121"><span style="color:#954121">return</span></span> mScreenHeight;}mScreenHeight = ((WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay().getHeight();<span style="color:#954121"><span style="color:#954121">return</span></span> mScreenHeight;}@Override<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">onGlobalLayout</span></span><span style="color:#0000ff">()</span> {Rect rect = <span style="color:#954121"><span style="color:#954121">new</span></span> Rect();<span style="color:#408080"><em><span style="color:#408080"><em>// 获取当前页面窗口的显示范围</em></span></em></span>((Activity) getContext()).getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);<span style="color:#954121"><span style="color:#954121">int</span></span> screenHeight = getScreenHeight();<span style="color:#954121"><span style="color:#954121">int</span></span> keyboardHeight = screenHeight - rect.bottom; <span style="color:#408080"><em><span style="color:#408080"><em>// 输入法的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">boolean</span></span> isActive = <span style="color:#954121"><span style="color:#954121">false</span></span>;<span style="color:#954121"><span style="color:#954121">if</span></span> (Math.abs(keyboardHeight) > screenHeight / <span style="color:#40a070"><span style="color:#40a070">4</span></span>) {isActive = <span style="color:#954121"><span style="color:#954121">true</span></span>; <span style="color:#408080"><em><span style="color:#408080"><em>// 超过屏幕五分之一则表示弹出了输入法</em></span></em></span>mKeyboardHeight = keyboardHeight;}mIsKeyboardActive = isActive;<span style="color:#954121"><span style="color:#954121">if</span></span> (mListener != <span style="color:#954121"><span style="color:#954121">null</span></span>) {mListener.onKeyboardStateChanged(isActive, keyboardHeight);}}}}</span>

(2) xml文件编写，在界面最外层套上自定义view，在需要滚动的控件外层添加scrollView

<span style="color:#000000"><com.example.smilexie.softboradblockedittext.util.KeyboardLayoutandroid:id=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@+</span>id/main_ll"</span></span>android:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_bg"</span></span>android:orientation=<span style="color:#219161"><span style="color:#219161">"vertical"</span></span>><ScrollViewandroid:id=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@+</span>id/login_ll"</span></span>android:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>><LinearLayoutandroid:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:orientation=<span style="color:#219161"><span style="color:#219161">"vertical"</span></span>><LinearLayoutandroid:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginRight=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginTop=<span style="color:#219161"><span style="color:#219161">"200dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_input_field_icon"</span></span>android:orientation=<span style="color:#219161"><span style="color:#219161">"horizontal"</span></span>><ImageViewandroid:layout_width=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_gravity=<span style="color:#219161"><span style="color:#219161">"center_vertical"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_yonghuming_icon"</span></span> /><EditTextandroid:id=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@+</span>id/ui_username_input"</span></span>style=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@style</span>/editext_input_style"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"40dp"</span></span>android:layout_marginRight=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@null</span>"</span></span>android:hint=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@string</span>/login_hint_username"</span></span>android:imeOptions=<span style="color:#219161"><span style="color:#219161">"actionNext"</span></span>android:textColor=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@android</span>:color/white"</span></span>android:textColorHint=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@android</span>:color/white"</span></span>><requestFocus /><<span style="color:#bb6688">/EditText></</span>LinearLayout><LinearLayoutandroid:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginRight=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginTop=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_input_field_icon"</span></span>android:orientation=<span style="color:#219161"><span style="color:#219161">"horizontal"</span></span>><ImageViewandroid:layout_width=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_gravity=<span style="color:#219161"><span style="color:#219161">"center_vertical"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_mima_icon"</span></span> /><EditTextandroid:id=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@+</span>id/ui_password_input"</span></span>style=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@style</span>/editext_input_style"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"40dp"</span></span>android:layout_marginRight=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@null</span>"</span></span>android:hint=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@string</span>/login_hint_pwd"</span></span>android:imeOptions=<span style="color:#219161"><span style="color:#219161">"actionDone"</span></span>android:inputType=<span style="color:#219161"><span style="color:#219161">"textPassword"</span></span>android:textColor=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@android</span>:color/white"</span></span>android:textColorHint=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@android</span>:color/white"</span></span>><<span style="color:#bb6688">/EditText></</span>LinearLayout><Buttonandroid:id=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@+</span>id/login_btn"</span></span>android:layout_width=<span style="color:#219161"><span style="color:#219161">"match_parent"</span></span>android:layout_height=<span style="color:#219161"><span style="color:#219161">"wrap_content"</span></span>android:layout_marginLeft=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginRight=<span style="color:#219161"><span style="color:#219161">"50dp"</span></span>android:layout_marginTop=<span style="color:#219161"><span style="color:#219161">"20dp"</span></span>android:background=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@mipmap</span>/login_button_bg_icon"</span></span>android:text=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@string</span>/login"</span></span>android:textColor=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@color</span>/titlebar_main_color"</span></span>android:textSize=<span style="color:#219161"><span style="color:#219161">"<span style="color:#008080">@dimen</span>/font_normal"</span></span> /><<span style="color:#bb6688">/LinearLayout></</span>ScrollView><<span style="color:#bb6688">/com.example.smilexie.softboradblockedittext.util.KeyboardLayout></span></span>

(3) Activity调用，自定义view控件添加键盘响应，在键盘变化时调用scrollView的smoothScrollTo去滚动界面

<span style="color:#000000"><span style="color:#408080"><em><span style="color:#408080"><em>/** * 监听键盘状态，布局有变化时，靠scrollView去滚动界面 */</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">addLayoutListener</span></span><span style="color:#0000ff">()</span> {bindingView.mainLl.setKeyboardListener(<span style="color:#954121"><span style="color:#954121">new</span></span> KeyboardLayout.KeyboardLayoutListener() {@Override<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">onKeyboardStateChanged</span></span><span style="color:#0000ff">(</span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">boolean</span></span></span><span style="color:#0000ff"> isActive, </span><span style="color:#954121"><span style="color:#0000ff"><span style="color:#954121">int</span></span></span><span style="color:#0000ff"> keyboardHeight)</span> {Log.e(<span style="color:#219161"><span style="color:#219161">"onKeyboardStateChanged"</span></span>, <span style="color:#219161"><span style="color:#219161">"isActive:"</span></span> + isActive + <span style="color:#219161"><span style="color:#219161">" keyboardHeight:"</span></span> + keyboardHeight);<span style="color:#954121"><span style="color:#954121">if</span></span> (isActive) {scrollToBottom();}}});}<span style="color:#408080"><em><span style="color:#408080"><em>/** * 弹出软键盘时将SVContainer滑到底 */</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">scrollToBottom</span></span><span style="color:#0000ff">()</span> {bindingView.loginLl.postDelayed(<span style="color:#954121"><span style="color:#954121">new</span></span> Runnable() {@Override<span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">run</span></span><span style="color:#0000ff">()</span> {bindingView.loginLl.smoothScrollTo(<span style="color:#40a070"><span style="color:#40a070">0</span></span>, bindingView.loginLl.getBottom() + SoftKeyInputHidWidget.getStatusBarHeight(LoginActivityForDiffkeyboardHeight.<span style="color:#954121"><span style="color:#954121">this</span></span>));}}, <span style="color:#40a070"><span style="color:#40a070">100</span></span>);}</span>

具体实现代码见demo中的LoginActivityForDiffkeyboardHeight类。实现效果如下： 
这里写图片描述 
可以看到键盘高度变化了，也不会影响界面布局

方法五：监听Activity顶层View，判断软键盘是否弹起，对界面重新绘制

此方法的实现来自android中提出的issue 5497 https://code.google.com/p/android/issues/detail?id=5497

使用场景：针对界面全屏或是沉浸式状态栏，界面包含比较多输入框，界面即使包裹了一层ScrollView,在键盘显示时，当前输入框下面的输入不能通过上下滑动界面来输入。

感谢下面提出评论的同学，指出此方法的不适配问题，之前写的博文在华为小米手机上确实有不适配情况，在输入时，键盘有时会错乱，现在已加入适配。

一、实现步骤：

1､把SoftHideKeyBoardUtil类复制到项目中； 
2､在需要使用的Activity的onCreate方法中添加：SoftHideKeyBoardUtil.assistActivity(this);即可。

二、实现原理：

SoftHideKeyBoardUtil类具体代码如下：

<span style="color:#000000"><span style="color:#408080"><em><span style="color:#408080"><em>/** * 解决键盘档住输入框 * Created by SmileXie on 2017/4/3. */</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#445588"><strong><span style="color:#954121"><span style="color:#445588"><strong><span style="color:#954121">class</span></strong></span></span> <span style="color:#445588"><strong><span style="color:#445588"><strong><span style="color:#445588"><strong>SoftHideKeyBoardUtil</strong></span></strong></span></strong></span> {</strong></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">static</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">assistActivity</span></span> <span style="color:#0000ff">(Activity activity)</span> {<span style="color:#954121"><span style="color:#954121">new</span></span> SoftHideKeyBoardUtil(activity);}<span style="color:#954121"><span style="color:#954121">private</span></span> View mChildOfContent;<span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> usableHeightPrevious;<span style="color:#954121"><span style="color:#954121">private</span></span> FrameLayout.LayoutParams frameLayoutParams;<span style="color:#408080"><em><span style="color:#408080"><em>//为适应华为小米等手机键盘上方出现黑条或不适配</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> contentHeight;<span style="color:#408080"><em><span style="color:#408080"><em>//获取setContentView本来view的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">boolean</span></span> isfirst = <span style="color:#954121"><span style="color:#954121">true</span></span>;<span style="color:#408080"><em><span style="color:#408080"><em>//只用获取一次</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span>  <span style="color:#954121"><span style="color:#954121">int</span></span> statusBarHeight;<span style="color:#408080"><em><span style="color:#408080"><em>//状态栏高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#19469d"><span style="color:#19469d">SoftHideKeyBoardUtil</span></span><span style="color:#0000ff">(Activity activity)</span> {<span style="color:#408080"><em><span style="color:#408080"><em>//1､找到Activity的最外层布局控件，它其实是一个DecorView,它所用的控件就是FrameLayout</em></span></em></span>FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);<span style="color:#408080"><em><span style="color:#408080"><em>//2､获取到setContentView放进去的View</em></span></em></span>mChildOfContent = content.getChildAt(<span style="color:#40a070"><span style="color:#40a070">0</span></span>);<span style="color:#408080"><em><span style="color:#408080"><em>//3､给Activity的xml布局设置View树监听，当布局有变化，如键盘弹出或收起时，都会回调此监听 </em></span></em></span>mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(<span style="color:#954121"><span style="color:#954121">new</span></span> ViewTreeObserver.OnGlobalLayoutListener() {<span style="color:#408080"><em><span style="color:#408080"><em>//4､软键盘弹起会使GlobalLayout发生变化</em></span></em></span><span style="color:#954121"><span style="color:#954121">public</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">onGlobalLayout</span></span><span style="color:#0000ff">()</span> {<span style="color:#954121"><span style="color:#954121">if</span></span> (isfirst) {contentHeight = mChildOfContent.getHeight();<span style="color:#408080"><em><span style="color:#408080"><em>//兼容华为等机型</em></span></em></span>isfirst = <span style="color:#954121"><span style="color:#954121">false</span></span>;}<span style="color:#408080"><em><span style="color:#408080"><em>//5､当前布局发生变化时，对Activity的xml布局进行重绘</em></span></em></span>possiblyResizeChildOfContent();}});<span style="color:#408080"><em><span style="color:#408080"><em>//6､获取到Activity的xml布局的放置参数</em></span></em></span>frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();}<span style="color:#408080"><em><span style="color:#408080"><em>// 获取界面可用高度，如果软键盘弹起后，Activity的xml布局可用高度需要减去键盘高度 </em></span></em></span><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">void</span></span> <span style="color:#19469d"><span style="color:#19469d">possiblyResizeChildOfContent</span></span><span style="color:#0000ff">()</span> {<span style="color:#408080"><em><span style="color:#408080"><em>//1､获取当前界面可用高度，键盘弹起后，当前界面可用布局会减少键盘的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">int</span></span> usableHeightNow = computeUsableHeight();<span style="color:#408080"><em><span style="color:#408080"><em>//2､如果当前可用高度和原始值不一样</em></span></em></span><span style="color:#954121"><span style="color:#954121">if</span></span> (usableHeightNow != usableHeightPrevious) {<span style="color:#408080"><em><span style="color:#408080"><em>//3､获取Activity中xml中布局在当前界面显示的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">int</span></span> usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();<span style="color:#408080"><em><span style="color:#408080"><em>//4､Activity中xml布局的高度-当前可用高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">int</span></span> heightDifference = usableHeightSansKeyboard - usableHeightNow;<span style="color:#408080"><em><span style="color:#408080"><em>//5､高度差大于屏幕1/4时，说明键盘弹出</em></span></em></span><span style="color:#954121"><span style="color:#954121">if</span></span> (heightDifference > (usableHeightSansKeyboard/<span style="color:#40a070"><span style="color:#40a070">4</span></span>)) {<span style="color:#408080"><em><span style="color:#408080"><em>// 6､键盘弹出了，Activity的xml布局高度应当减去键盘高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">if</span></span> (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){frameLayoutParams.height = usableHeightSansKeyboard - heightDifference + statusBarHeight;} <span style="color:#954121"><span style="color:#954121">else</span></span> {frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;}} <span style="color:#954121"><span style="color:#954121">else</span></span> {frameLayoutParams.height = contentHeight;}<span style="color:#408080"><em><span style="color:#408080"><em>//7､ 重绘Activity的xml布局</em></span></em></span>mChildOfContent.requestLayout();usableHeightPrevious = usableHeightNow;}}<span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> <span style="color:#19469d"><span style="color:#19469d">computeUsableHeight</span></span><span style="color:#0000ff">()</span> {Rect r = <span style="color:#954121"><span style="color:#954121">new</span></span> Rect();mChildOfContent.getWindowVisibleDisplayFrame(r);<span style="color:#408080"><em><span style="color:#408080"><em>// 全屏模式下：直接返回r.bottom，r.top其实是状态栏的高度</em></span></em></span><span style="color:#954121"><span style="color:#954121">return</span></span> (r.bottom - r.top);}
}</span>

它的实现原理主要是： 
(1) 找到Activity的最外层布局控件，我们知道所有的Activity都是DecorView，它就是一个FrameLayout控件，该控件id是系统写死叫R.id.content，就是我们setContentView时，把相应的View放在此FrameLayout控件里

<span style="color:#000000"><span style="color:#19469d">FrameLayout</span> content = (FrameLayout) activity.findViewById(android.R.id.content);</span>

所以content.getChildAt(0)获取到的mChildOfContent，也就是我们用setContentView放进去的View。 
(2) 给我们的Activity的xml布局View设置一个Listener监听

<span style="color:#000000">mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener({ possiblyResizeChildOfContent();
});</span>

View.getViewTreeObserver()可以获取一个ViewTreeObserver对象——它是一个观察者，用以监听当前View树所发生的变化。这里所注册的addOnGlobalLayoutListener，就是会在当前的View树的全局布局（GlobalLayout）发生变化、或者其中的View可视状态有变化时，进行通知回调。『软键盘弹出/隐 』都能监听到。 
(3) 获取当前界面可用高度

<span style="color:#000000"><span style="color:#954121"><span style="color:#954121">private</span></span> <span style="color:#954121"><span style="color:#954121">int</span></span> <span style="color:#19469d"><span style="color:#19469d">computeUsableHeight</span></span><span style="color:#0000ff">()</span> {Rect rect = <span style="color:#954121"><span style="color:#954121">new</span></span> Rect();mChildOfContent.getWindowVisibleDisplayFrame(rect);<span style="color:#408080"><em><span style="color:#408080"><em>// rect.top其实是状态栏的高度，如果是全屏主题，直接 return rect.bottom就可以了</em></span></em></span><span style="color:#954121"><span style="color:#954121">return</span></span> (rect.bottom - rect.top);
}</span>

如下图所示： 
这里写图片描述 
(4) 重设高度， 我们计算出的可用高度，是目前在视觉效果上能看到的界面高度。但当前界面的实际高度是比可用高度要多出一个软键盘的距离的。

具体实现代码见demo中的TransStatusbarWisthAssistActivity类。

注意：如果既使用了沉浸式状态栏，又加了fitSystetemWindow=true属性，就需要在AndroidMainfest.xml注册Activity的地方添加上以下属性。因为你两种都用，系统不知道用哪种了。fitSystetemWindow已经有resize屏幕的作用。

<span style="color:#000000">android:windowSoftInputMode=<span style="color:#219161"><span style="color:#219161">"stateHidden|adjustPan"</span></span></span>

通过上面的这种方法，一般布局输入键盘挡住输入框的问题基本都能解决。即使界面全屏或是沉浸式状态栏情况。

总结：

下面对上面几种方法进行对比：

  • 方法一：优点：使用简单，只需在Activity的AndroidMainfest.xml中设置windowSoftInput属性即可。 
    注意点：adjustResize属性必须要界面大小可以自身改变； 
    缺点：当输入框比较多时，当前输入框下方的输入框会初键盘挡住，须收起键盘再进入输入；使用adjustPan，输入框较多时，因它是把界面当成一个整体，只会显示一屏的高度，会把ActionBar顶上去。

  • 方法二：优点：使用简单，只需在Activity的最外层布局包裹一个ScrollView即可。 
    注意点：不可使用adjustPan属性，否则ScrollView失效； 
    缺点：对于全屏时，在键盘显示时，无法上下滑动界面达到输入的目的；

  • 方法三：优点：可以解决全屏时，键盘挡入按钮问题。 
    缺点：只要有此需求的Activity均需要获取到最外层控件和最后一个控件，监测键盘是否弹出，再调用控件的scrollTo方法对界面整体上移或是下移。代码冗余。对于键盘高度变化时，适配不好。

  • 方法四：优点：可以解决全屏时，键盘挡入按钮问题。 
    缺点：只要有此需求的Activity均需要获取到最外层控件和最后一个控件，布局多出一层。

  • 方法五：优点：可以解决全屏时，键盘挡入输入框问题。只需要写一个全局类，其他有需求的界面直接在onCreate方法里调用此类的全局方法，即可。 
    缺点：多用了一个类。

综上所述： 
1) 当输入框比较少时，界面只有一个输入框时，可以通过方法一设置adjustPan； 
2) 如果对于非全屏/非沉浸式状态栏需求，只需要使用方法二ScrollView+adjustResize； 
3) 如果对于使用沉浸式状态栏，使用fitSystemWindow=true属性，按道理android系统已经做好适配，键盘不会挡住输入框； 
4) 如果全屏/沉浸式状态栏界面，类似于登录界面，有需要把登录键钮或是评论按钮也顶起，如果键盘没有变化需求，可以使用方法三，若需要适配键盘高度变化，则需要使用方法四； 
5) 如果界面使用全屏或沉浸式状态栏，没有使用fitSystemWindow=true属性，一般如需要用到抽屈而且状态栏颜色也需要跟着变化，则选择方法五更恰当。

代码传送门：https://github.com/xiewenfeng/SoftboradBlockEdittext 如果有哪写的不对或是不好的地方，欢迎大家提出宝贵意见，一起探讨，共同进步。

这篇关于android全屏／沉浸式状态栏下，各种键盘挡住输入框解决办法[转]的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


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