本文主要是介绍实现RadioGroup与Fragment的交互，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！
这算是对这篇的更新吧，之前的虽然能实现效果，但是每次点击就会产生一个新的对象，这样是不好的，接下来是更新的版本
public class MainActivity extends FragmentActivity {
long first;
private static final String TAG = "TestFragmentTab";
@InjectView(R.id.radio_group)
RadioGroup tabButtonGroup;
@InjectView(R.id.download_apk)
ImageView download;
private long mPressedTime = 0;
private int tabIds[] = new int[]{
R.id.one,
R.id.two,
R.id.three,
R.id.four
};
FirstFragment mTab1;
SecondFragment mTab2;
ThreadFragment mTab3;
FourFragment mTab4;
@Override
public void onAttachFragment(Fragment fragment) {
super.onAttachFragment(fragment);
Log.d(TAG, "onAttachFragment");
/**防止页面出现重叠现象*/
if (mTab1 == null && fragment instanceof FirstFragment) {
mTab1 = (FirstFragment) fragment;
} else if (mTab2 == null && fragment instanceof SecondFragment) {
mTab2 = (SecondFragment) fragment;
} else if (mTab3 == null && fragment instanceof ThreadFragment) {
mTab3 = (ThreadFragment) fragment;
} else if (mTab4 == null && fragment instanceof FourFragment) {
mTab4 = (FourFragment) fragment;
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate");
setContentView(R.layout.main_activity);
ButterKnife.inject(this);
initView();
initData();
setSelection(0);
}
void initView() {
re = (ImageView) findViewById(R.id.iv_right);
}
void initData() {
tabButtonGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
for (int i = 0; i < tabIds.length; i++) {
if (tabIds[i] == checkedId) {
setSelection(i);
break;
}
}
}
});
re.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("*/*");
startActivityForResult(intent,1);
}
});
download.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Apkdowanload.intoDownloadManager(MainActivity.this);
}
});
}
private void setSelection(int position) {
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
hideAllFragments(ft);
switch (position) {
case 0:
if (mTab1 == null) {
mTab1 = new FirstFragment();
ft.add(R.id.fragment_container, mTab1);
} else {
ft.show(mTab1);
}
break;
case 1:
if (mTab2 == null) {
mTab2 = new SecondFragment();
ft.add(R.id.fragment_container, mTab2);
} else {
ft.show(mTab2);
}
break;
case 2:
if (mTab3 == null) {
mTab3 = new ThreadFragment();
ft.add(R.id.fragment_container, mTab3);
} else {
ft.show(mTab3);
}
break;
case 3:
if (mTab4 == null) {
mTab4 = new FourFragment();
ft.add(R.id.fragment_container, mTab4);
} else {
ft.show(mTab4);
}
break;
default:
break;
}
ft.commit();
}
private void hideAllFragments(FragmentTransaction ft) {
if (mTab1 != null) {
ft.hide(mTab1);
}
if (mTab2 != null) {
ft.hide(mTab2);
}
if (mTab3 != null) {
ft.hide(mTab3);
}
if (mTab4 != null) {
ft.hide(mTab4);
}
}
@Override
public void onBackPressed() {
long first = System.currentTimeMillis();
if ((first - mPressedTime) > 2000) {
Toast.makeText(MainActivity.this, "再按一次退出程序", Toast.LENGTH_SHORT).show();
mPressedTime = first;
} else {
System.exit(0);
}
}
}
布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include layout="@layout/titlebar"/>
<FrameLayout android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<RadioGroup android:id="@+id/radio_group"
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
android:layout_gravity="center_vertical"
android:background="@android:color/black">
<RadioButton android:id="@+id/one"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:checked="true"
android:gravity="center"
android:button="@null"
android:layout_marginTop="2dp"
android:drawableTop="@drawable/selector_main_tab_pic"
android:text="首页"
android:textColor="@drawable/selector_main_tab_text_color"/>
<RadioButton android:id="@+id/two"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:gravity="center"
android:button="@null"
android:layout_marginTop="2dp"
android:drawableTop="@drawable/selector_game_tab_pic"
android:text="游戏"
android:textColor="@drawable/selector_main_tab_text_color"/>
<RadioButton android:id="@+id/three"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:button="@null"
android:layout_marginTop="2dp"
android:gravity="center"
android:drawableTop="@drawable/selector_pic_tab_pic"
android:text="图集"
android:textColor="@drawable/selector_main_tab_text_color"/>
<RadioButton android:id="@+id/four"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1"
android:button="@null"
android:layout_marginTop="2dp"
android:gravity="center"
android:drawableTop="@drawable/selector_self_tab_pic"
android:text="个人"
android:textColor="@drawable/selector_main_tab_text_color"/>
</RadioGroup>
</LinearLayout>
public class MainActivity extends FragmentActivity {
private Fragment[] fragments = {new Fragment1(),//四个界面new Fragment2(),
new Fragment3(),
new Fragment4()};
private int index;
// 当前fragment的index
private int currentTabIndex;
private RadioGroup mTabs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTabs = (RadioGroup) findViewById(R.id.tabs);
mTabs.setOnCheckedChangeListener(mOnCheckedChangeListener);
mTabs.check(R.id.rb_main);
// 添加显示第一个fragment
getSupportFragmentManager()
.beginTransaction()
.add(R.id.fragment_container, fragments[0])
.add(R.id.fragment_container, fragments[3]).hide(fragments[3]).show(fragments[0]).commit();
}
private RadioGroup.OnCheckedChangeListener mOnCheckedChangeListener = new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.rb_main: index = 0;
break;
case R.id.rb_music: index = 1;
break;
case R.id.rb_course: index = 2;
break;
case R.id.rb_contact:index = 3;
break;
}
if (currentTabIndex != index) {
FragmentTransaction trx = getSupportFragmentManager().beginTransaction();
trx.hide(fragments[currentTabIndex]);
if (!fragments[index].isAdded()) {
trx.add(R.id.fragment_container, fragments[index]);
}
trx.show(fragments[index]).commit();
}
currentTabIndex = index;
}
};
}
这篇关于实现RadioGroup与Fragment的交互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！
