protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
frag_layout = findViewById(R.id.fragment_layout);
radio_group = findViewById(R.id.radio_group);
oneFragment = new OneFragment();
twoFragment = new TwoFragment();
threeFragment = new ThreeFragment();
manager = getSupportFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
transaction.replace(R.id.fragment_layout,oneFragment).commit();
radio_group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
FragmentTransaction transaction = manager.beginTransaction();
switch (i){
case R.id.rb1:
transaction.replace(R.id.fragment_layout,oneFragment);
break;
case R.id.rb2:
transaction.replace(R.id.fragment_layout,twoFragment);
case R.id.rb3:
transaction.replace(R.id.fragment_layout,threeFragment);
break;
}
transaction.commit();
}
});
}
}
<FrameLayout
android:id="@+id/fragment_layout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="9">
</FrameLayout>
<RadioGroup
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:id="@+id/radio_group"
android:orientation="horizontal"
>
<RadioButton
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:id="@+id/rb1"
android:textSize="20sp"
android:padding="10dp"
android:text="首页"
android:checked="true"
android:background="@drawable/selector"
android:button="@null"
android:gravity="center"
/>
<RadioButton
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:id="@+id/rb2"
android:textSize="20sp"
android:padding="10dp"
android:text="附近"
android:background="@drawable/selector"
android:button="@null"
android:gravity="center"
/>
<RadioButton
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:id="@+id/rb3"
android:textSize="20sp"
android:padding="10dp"
android:text="发现"
android:background="@drawable/selector"
android:button="@null"
android:gravity="center"
/>
</RadioGroup>