主界面的Fragment切换之使用RadioGroup配合切换Fragment

public class MainActivity extends AppCompatActivity implements RadioGroup.OnCheckedChangeListener {
@BindView(R.id.fl_container)
FrameLayout flContainer;
@BindView(R.id.rb_all)
RadioButton rbAll;
@BindView(R.id.rb_tweet)
RadioButton rbTweet;
@BindView(R.id.rb_add)
TextView rbAdd;
@BindView(R.id.rb_explore)
RadioButton rbExplore;
@BindView(R.id.rb_me)
RadioButton rbMe;
@BindView(R.id.rg_group)
RadioGroup rgGroup;
private ArrayList<Fragment> fragments;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//创建fragment实例并把他们加入集合
fragments = new ArrayList<>();
addFragment();
//设置默认被选中的RadioButton
rgGroup.check(R.id.rb_all);
switchFragment(0);
//radiogroup中的radiobutton的点击事件
rgGroup.setOnCheckedChangeListener(this);
//radiogroup中加号的点击事件
rbAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "hahaha",
Toast.LENGTH_SHORT).show();
}
});
/**
* radiogroup中的radiobutton的点击事件
*
* @param group
* @param checkedId
*/
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.rb_all:
switchFragment(0);
break;
case R.id.rb_tweet:
switchFragment(1);
break;
case R.id.rb_explore:
switchFragment(2);
break;
case R.id.rb_me:
switchFragment(3);
break;
}
}

/**
* 创建fragment实例并把他们加入集合
*/

public void addFragment() {
fragments.add(new AllFrament());
fragments.add(new TweetFrament());
fragments.add(new ExploreFrament());
fragments.add(new MeFrament());
}

/**
* 点击切换fragment
*
* @param position
*/
public void switchFragment(int position) {
//开启事务
FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
//遍历集合
for (int i = 0; i <fragments.size() ; i++) {
Fragment fragment = fragments.get(i);
if (i==position){
//显示fragment
if (fragment.isAdded()){
//如果这个fragment已经被事务添加,显示
fragmentTransaction.show(fragment);
}else{
//如果这个fragment没有被事务添加过,添加
fragmentTransaction.add(R.id.fl_container,fragment);
}
}else{
//隐藏fragment
if (fragment.isAdded()){
//如果这个fragment已经被事务添加,隐藏
fragmentTransaction.hide(fragment);
}
}
}
//提交事务
fragmentTransaction.commit();
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@+id/fl_container"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</FrameLayout>

<RadioGroup
android:id="@+id/rg_group"
android:layout_width="match_parent"
android:layout_height="60dp"
android:layout_marginBottom="0dp"
android:gravity="center_vertical"
android:orientation="horizontal">
<RadioButton
style="@style/tab_style"
android:id="@+id/rb_all"
android:text="综合"
android:drawableTop="@drawable/tab_icon_new"/>

<RadioButton
style="@style/tab_style"
android:id="@+id/rb_tweet"
android:text="动弹"
android:drawableTop="@drawable/tab_icon_tweet"/>

<TextView
style="@style/tab_style"
android:id="@+id/rb_add"
android:paddingTop="10dp"
android:drawableTop="@drawable/btn_quickoption_selector"/>

<RadioButton
style="@style/tab_style"
android:id="@+id/rb_explore"
android:text="发现"
android:drawableTop="@drawable/tab_icon_explore"/>

<RadioButton
style="@style/tab_style"
android:id="@+id/rb_me"
android:text="我"
android:drawableTop="@drawable/tab_icon_me"/>
</RadioGroup>
</LinearLayout>