小编Wyt*_*tas的帖子

我有两个活动:

public class MainActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
 }
 public void click(View view) {
  Intent intent= new Intent(this, TranslucentActivity.class);
  startActivity(intent);        
 }
}

public class TranslucentActivity extends Activity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  this.setTheme(android.R.style.Theme_Translucent);
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_translucent);
 }
}

布局activity_main

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android1="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:onClick="click" />
</RelativeLayout>

布局activity_translucent

<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"
    tools:context=".TranslucentActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Hello_world" />
</RelativeLayout>

表现 …