我有一个Button
在Fragment
. 如果Button
单击它必须Fragment
用另一个替换Fragment
. Fragments
activity_main.xml 中的内容是静态创建的。
<LinearLayout 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="#efefef"
android:orientation="vertical"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="3" >
<Button
android:id="@+id/bHome"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_weight="1"
android:background="#000000"
android:padding="3dp"
android:text="Home"
android:textColor="#ffffff" />
<Button
android:id="@+id/bEvents"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_weight="1"
android:background="#f8bd0e"
android:padding="3dp"
android:text="Events" />
<Button
android:id="@+id/bNearby"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_weight="1"
android:background="#f8bd0e"
android:padding="3dp"
android:text="Nearby" />
</LinearLayout>
<LinearLayout
android:id="@+id/llFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<fragment
android:id="@+id/fHome"
android:name="com.example.fragmentstack.Home"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp" />
<fragment
android:id="@+id/fEvents"
android:name="com.example.fragmentstack.Events"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp" />
<fragment
android:id="@+id/fNear"
android:name="com.example.fragmentstack.NearBy"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp" />
<FrameLayout
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</FrameLayout>
</LinearLayout>
activity_main.xml 的输出是
主要活动:
public class MainActivity extends FragmentActivity implements OnClickListener {
Button home, events, near;
Fragment f1, f2, f3, f4;
FragmentManager manager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
home = (Button) findViewById(R.id.bHome);
events = (Button) findViewById(R.id.bEvents);
near = (Button) findViewById(R.id.bNearby);
home.setOnClickListener(this);
events.setOnClickListener(this);
near.setOnClickListener(this);
manager = getSupportFragmentManager();
f1 = manager.findFragmentById(R.id.fHome);
f2 = manager.findFragmentById(R.id.fEvents);
f3 = manager.findFragmentById(R.id.fNear);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.bHome:
if (home.isPressed()) {
home.setBackgroundColor(Color.BLACK);
home.setTextColor(Color.WHITE);
events.setBackgroundResource(R.color.Yellow);
near.setBackgroundResource(R.color.Yellow);
events.setTextColor(Color.BLACK);
near.setTextColor(Color.BLACK);
FragmentTransaction transaction = getSupportFragmentManager()
.beginTransaction();
transaction.hide(f2);
transaction.hide(f3);
transaction.show(f1);
transaction.commit();
}
break;
case R.id.bEvents:
if (events.isPressed()) {
events.setBackgroundColor(Color.BLACK);
events.setTextColor(Color.WHITE);
home.setBackgroundResource(R.color.Yellow);
near.setBackgroundResource(R.color.Yellow);
home.setTextColor(Color.BLACK);
near.setTextColor(Color.BLACK);
FragmentTransaction transaction1 = getSupportFragmentManager()
.beginTransaction();
transaction1.hide(f1);
transaction1.hide(f3);
transaction1.show(f2);
transaction1.commit();
}
break;
case R.id.bNearby:
if (near.isPressed()) {
near.setBackgroundColor(Color.BLACK);
near.setTextColor(Color.WHITE);
home.setBackgroundResource(R.color.Yellow);
events.setBackgroundResource(R.color.Yellow);
home.setTextColor(Color.BLACK);
events.setTextColor(Color.BLACK);
FragmentTransaction transaction2 = getSupportFragmentManager()
.beginTransaction();
transaction2.hide(f1);
transaction2.hide(f2);
transaction2.show(f3);
transaction2.commit();
}
break;
}
}
}
现在Home
扩展Fragment
. home 的 xml 布局有一个Button
和一个。TextView
在这里我将 onClicking Button 替换为Home Fragment
new Update Profile Fragment
。
public class Home extends Fragment {
Button btn;
View view;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
view = inflater.inflate(R.layout.home, container, false);
init();
return view;
}
private void init() {
btn = (Button) view.findViewById(R.id.bUpdate);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment fg = new UpdateProfile();
FragmentTransaction fragmentTransaction = getFragmentManager()
.beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fg);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
});
}
}
R.id.fragment_container
存在于activity_main.xml 中。现在我面临的问题是单击按钮时它没有用新的片段替换片段。