自定义仿IOS的圆角AlertDialog

本文主要是介绍自定义仿IOS的圆角AlertDialog，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！

 以前都比较经常看别人写的博客，比较少动手写，最近有时间，觉得可以将工作中积累下来的一些知识点，经验什么的记录在博客中， 

 有助于自己理解，水平有限，希望能够逐渐提升自己的能力。 

 先上个效果图 ，也可以根据自己需求，添加控件，也可以根据这种思路，自己去修改布局文件。 

 首先在styles文件里定义样式。 

<style name="AlertDialogStyle" parent="@android:style/Theme.Dialog"><item name="android:windowBackground">@android:color/transparent</item><item name="android:windowContentOverlay">@null</item><item name="android:windowIsFloating">true</item><item name="android:windowFrame">@null</item><item name="android:backgroundDimEnabled">true</item><item name="android:windowNoTitle">true</item><item name="android:windowIsTranslucent">true</item>
</style>

 接着再drawable文件夹下自定义一个圆角的shape 

<?xml version="1.0" encoding="utf-8"?> 
 <shape xmlns:android="http://schemas.android.com/apk/res/android" > 

 <!-- radius 为圆角半径  --> 
     <corners android:radius="20dp" ></corners> 
     <solid android:color="#ffffff" /> 
 </shape> 
 

 然后自定义一个dialog的xml布局, 并且设置背景引用圆角shape android:background="@drawable/bg_course_dialog" 

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@drawable/bg_view_dialog_warm_tip"
    ><ImageView
        android:id="@+id/icon"
        android:layout_width="25dp"
        android:layout_height="25dp"
        android:layout_marginTop="28dp"
        android:layout_toLeftOf="@+id/title"
        android:src="@mipmap/ic_launcher_round"
        android:visibility="gone"
        /><TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="25dp"
        android:textColor="#000000"
        android:textSize="20sp"
        android:textStyle="bold"
        tools:text="titletitletitle"
        /><LinearLayout
        android:id="@+id/ll_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/title"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="25dp"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginTop="5dp"
        android:gravity="center"
        android:orientation="vertical"
        ><TextView
            android:id="@+id/message"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textColor="#000000"
            android:textSize="16sp"
            tools:text="message"/></LinearLayout><View
        android:id="@+id/line_horizontal"
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:layout_below="@+id/ll_content"
        android:visibility="gone"
        android:background="#dad6d6"/><LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/line_horizontal"
        android:orientation="horizontal"><TextView
            android:id="@+id/dialog_cancel"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:layout_weight="1"
            android:clickable="true"
            android:gravity="center"
            android:text="取消"
            android:textColor="#007aff"
            android:textSize="18sp"
            android:visibility="gone"/><View
            android:id="@+id/line_vertical"
            android:layout_width="0.5dp"
            android:layout_height="match_parent"
            android:background="#dad6d6"
            android:visibility="gone"/><TextView
            android:id="@+id/dialog_commit"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginBottom="8dp"
            android:layout_marginTop="8dp"
            android:layout_weight="1"
            android:gravity="center"
            android:text="确认"
            android:textColor="#007aff"
            android:textSize="18sp"
            android:visibility="gone"/></LinearLayout></RelativeLayout>

然后是封装的具体代码，这里使用alertdialog中的建造者模式Builder来建造，这样可以方便我们建造不同需求的dialog。 

代码很简单 首先是构造一个Params来管理我们具体要build的属性 

public static class Builder implements BuilderInterface {private Context mContext;
    private final ControllerParams mParams;
    private Controller mController;

    public Builder(Context context) {mContext = context;
        mParams = new ControllerParams();
        mController = new Controller(mContext);
    }public Builder setContentView(int layoutId) {mParams.setLayoutId(layoutId);
        return this;
    }public Builder setContentView(View view) {mParams.setContentView(view);
        return this;
    }public Builder setTitle(String title) {mParams.setTitle(title);
        return this;
    }public Builder reSetTitle(String title) {mParams.setTitle(title);
        mController.setTitle(title);
        return this;
    }public Builder reSetMessage(String message) {mParams.setMessage(message);
        mController.setMessage(message);
        return this;
    }public Builder reSetIcon(int iconId) {mParams.setIconId(iconId);
        mController.setIcon(iconId);
        return this;
    }public Builder setMessage(String message) {mParams.setMessage(message);
        return this;
    }public Builder setIcon(int iconId) {mParams.setIconId(iconId);
        return this;
    }public Builder setCancelable(boolean cancelable) {mParams.setCancelable(cancelable);
        return this;
    }public Builder setNegativeButton(String text, OnNegativeListener listener) {mParams.setNegativeListener(listener);
        mParams.setNegativeText(text);

        return this;
    }public Builder setPositiveButton(String text,  OnPositiveListener listener)  {mParams.setPositiveListener(listener);
        mParams.setPositiveText(text);
        return this;
    }/**
     * 建造dialog
     * @return dialog
     */
    public Dialog create() {Dialog dialog = new Dialog(mContext, R.style.AlertDialogStyle);
        //属性交给controller去应用到dialog上
        mParams.apply(mController, dialog);
        return dialog;
    }/**
     * 建造一个默认的dialog
     * @param onPositiveListener 确认按键监听
     * @param onNegativeListener 取消按键监听
     * @return dialog
     */
    public Dialog createDefault(OnPositiveListener onPositiveListener, OnNegativeListener onNegativeListener) {Dialog dialog = new Dialog(mContext, R.style.AlertDialogStyle);
        build(onPositiveListener, onNegativeListener);
        mParams.apply(mController, dialog);
        return dialog;
    }private void build(OnPositiveListener onPositiveListener, OnNegativeListener onNegativeListener) {setTitle("温馨提示").setMessage("确认提交吗").setCancelable(false).setPositiveButton("确认", onPositiveListener).setNegativeButton("取消", onNegativeListener);
    }
}

 管理属性的类核心方法就是apply,在这里判断是否缓存了属性，有的话就交给controller去设置给dialog 

/**
 * 管理dialog所有属性的类
 */
private static class ControllerParams {private String mTitle;
    private String mMessage;
    private int mIconId = -1;
    private int mLayoutId = -1;
    private boolean mCancelable;
    private String mPositiveText;
    private String mNegativeText;
    private OnPositiveListener mPositiveListener;
    private OnNegativeListener mNegativeListener;
    private View mContentView;


    private void apply(Controller controller, Dialog dialog) {if (mContentView != null) {controller.setContentView(mContentView, dialog);
        }else {controller.setContentView(mLayoutId, dialog);
        }dialog.setCancelable(mCancelable);
        if (mCancelable) {dialog.setCanceledOnTouchOutside(true);
        }if (mTitle != null) {controller.setTitle(mTitle);
        }if (mMessage != null) {controller.setMessage(mMessage);
        }if (mPositiveText != null && mPositiveListener != null) {controller.setPositiveButton(mPositiveText, mPositiveListener);
        }if (mNegativeText != null && mNegativeListener != null) {controller.setNegativeButton(mNegativeText, mNegativeListener);
        }if (mIconId != -1) {controller.setIcon(mIconId);
        }}public int getLayoutId() {return mLayoutId;
    }private void setLayoutId(int layoutId) {mLayoutId = layoutId;
    }public String getTitle() {return mTitle;
    }private void setTitle(String title) {mTitle = title;
    }public String getMessage() {return mMessage;
    }private void setMessage(String message) {mMessage = message;
    }public int getIconId() {return mIconId;
    }private void setIconId(int iconId) {mIconId = iconId;
    }public boolean isCancelable() {return mCancelable;
    }private void setCancelable(boolean cancelable) {mCancelable = cancelable;
    }public String getPositiveText() {return mPositiveText;
    }private void setPositiveText(String positiveText) {mPositiveText = positiveText;
    }public String getNegativeText() {return mNegativeText;
    }private void setNegativeText(String negativeText) {mNegativeText = negativeText;
    }public OnPositiveListener getPositiveListener() {return mPositiveListener;
    }private void setPositiveListener(OnPositiveListener positiveListener) {mPositiveListener = positiveListener;
    }public OnNegativeListener getNegativeListener() {return mNegativeListener;
    }private void setNegativeListener(OnNegativeListener negativeListener) {mNegativeListener = negativeListener;
    }private void setContentView(View contentView) {mContentView = contentView;
    }
}

 这里定义2个点击监听，用来回调dialog中确认和取消的点击。 

/**
 * 确认按键监听
 */
public interface OnPositiveListener {void onPositive(Dialog dialog);

}/**
 * 取消按键监听
 */
public interface OnNegativeListener {void onNegative(Dialog dialog);
}

 这里controller中封装了最主要的代码，代码很简单，就是将上面写的dialog的 xml布局文件inflate出来设置给dialog,这也是封装好的默认的dialog 就跟一开始的效果图一样。但是我们说了，我们有可能有其他需求，这时候就需要用builder.setcontentview将我们需要的具体的view或者layoutid传进来， 

 这时候看代码，我们布局文件中的ll_content就会将默认的message的textview remove掉，然后再把穿件来的view添加进来。 

private static class Controller implements View.OnClickListener,BuilderInterface {private Context mContext;
    private TextView mTvTitle;
    private TextView mTvMessage;
    private TextView mTvPositive;
    private TextView mTvNegative;
    private ImageView mIvIcon;
    private View mHorizontalLine;
    private View mVerticalLine;
    private View mRootView;
    private OnNegativeListener mOnNegativeListener;
    private OnPositiveListener mOnPositiveListener;
    private Dialog mDialog;
    private View mContentView;
    private final LinearLayout mLlContent;


    private   Controller(Context context) {mContext = context;
        mRootView = View.inflate(mContext, R.layout.view_dialog_warm_tip, null);
        mLlContent = (LinearLayout) mRootView.findViewById(R.id.ll_content);
        mHorizontalLine = mRootView.findViewById(R.id.line_horizontal);
    }private void setContentView(int layoutResID, Dialog dialog) {if (layoutResID == -1) {} else {mContentView = View.inflate(mContext, layoutResID, null);
            mLlContent.removeAllViews();
            mLlContent.addView(mContentView);
        }mDialog = dialog;
        dialog.setContentView(mRootView, getPrams(mContext));
    }private void setContentView(View view, Dialog dialog) {mLlContent.removeAllViews();
        mLlContent.addView(view);
        mDialog = dialog;
        dialog.setContentView(mRootView, getPrams(mContext));
    }private FrameLayout.LayoutParams getPrams(Context context) {WindowManager windowManager = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        Display sDefaultDisplay = windowManager.getDefaultDisplay();

        return new FrameLayout.LayoutParams((int) (sDefaultDisplay.getWidth() * 0.80f),
                ViewGroup.LayoutParams.WRAP_CONTENT);

    }public Controller setTitle(String title) {mTvTitle = (TextView) mRootView.findViewById(R.id.title);
        if (mTvTitle != null) {mTvTitle.setText(title);
        }return this;
    }public Controller setMessage(String message) {mTvMessage = (TextView) mRootView.findViewById(R.id.message);
        if (mTvMessage != null) {mTvMessage.setText(message);
        }return this;
    }public Controller setIcon(int iconId) {mIvIcon = (ImageView) mRootView.findViewById(R.id.icon);
        if (mIvIcon != null) {mIvIcon.setImageResource(iconId);
            mIvIcon.setVisibility(View.VISIBLE);
        }return this;
    }@Override
    public BuilderInterface setCancelable(boolean cancelable) {return null;
    }public Controller setNegativeButton(String negativeText, OnNegativeListener listener) {mTvNegative = (TextView) mRootView.findViewById(R.id.dialog_cancel);
        mVerticalLine = mRootView.findViewById(R.id.line_vertical);
        if (mTvNegative != null) {mTvNegative.setVisibility(View.VISIBLE);
            mTvNegative.setText(negativeText);
            setOnNegativeListener(listener);
            mHorizontalLine.setVisibility(View.VISIBLE);
            if (mTvPositive != null) {mVerticalLine.setVisibility(View.VISIBLE);
            }}return this;
    }public Controller setPositiveButton(String positiveText, OnPositiveListener listener) {mTvPositive = (TextView) mRootView.findViewById(R.id.dialog_commit);

        if (mTvPositive != null) {mTvPositive.setVisibility(View.VISIBLE);
            mTvPositive.setText(positiveText);
            setOnPositiveListener(listener);
            mHorizontalLine.setVisibility(View.VISIBLE);
        }return this;
    }private Controller setOnNegativeListener(OnNegativeListener onNegativeListener) {mOnNegativeListener = onNegativeListener;
        mTvNegative.setOnClickListener(this);
        return this;
    }private Controller setOnPositiveListener(OnPositiveListener onPositiveListener) {mOnPositiveListener = onPositiveListener;
        mTvPositive.setOnClickListener(this);
        return this;
    }@Override
    public void onClick(View v) {switch (v.getId()) {case R.id.dialog_cancel:
                if (mOnNegativeListener != null) {mOnNegativeListener.onNegative(mDialog);
                }break;
            case R.id.dialog_commit:
                if (mOnPositiveListener != null) {mOnPositiveListener.onPositive(mDialog);
                }break;
        }}
}

 然后是在activity中的代码，使用方法就跟alerdialog一样，具体的可以看源码。 

     private void initDefaultDialog() {SherlockDialog.Builder builder = new SherlockDialog.Builder(this);
        mDialog = builder.createDefault(this, this);
//        builder.reSetTitle("重新设置Tiltle");
    }private void initEditDialog() {SherlockDialog.Builder builder = new SherlockDialog.Builder(this);

        EditText editText = new EditText(this);
        builder.setContentView(editText);
        mDialog = builder.createDefault(this, this);

    }private void initDialog() {SherlockDialog.Builder builder = new SherlockDialog.Builder(this);
        mDialog = builder.setTitle("温馨提示").setMessage("确认提交吗？").setPositiveButton("确认", new SherlockDialog.OnPositiveListener() {@Override
                    public void onPositive(Dialog dialog) {Toast.makeText(DialogActivity.this, "确认提交", Toast.LENGTH_SHORT).show();
                        dialog.dismiss();
                    }}).setNegativeButton("取消", new SherlockDialog.OnNegativeListener() {@Override
                    public void onNegative(Dialog dialog) {Toast.makeText(DialogActivity.this, "取消提交", Toast.LENGTH_SHORT).show();
                        dialog.dismiss();
                    }}).setIcon(R.mipmap.ic_launcher_round).create();
    }public void button1(View view) {initDialog();
        mDialog.show();
    }public void button2(View view) {initEditDialog();
        mDialog.show();
    }public void button3(View view) {initDefaultDialog();
        mDialog.show();
    }@Override
    public void onPositive(Dialog dialog) {dialog.dismiss();
    }@Override
    public void onNegative(Dialog dialog) {dialog.dismiss();
    }