Android全透明Activity示例

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"       package="com.example.android.xxxx">     <application android:persistent="true"          android:label="@string/home_title"          android:icon="@drawable/ic_launcher_home">        <activity android:name="xxxxxxxx"           android:theme="@android:style/Theme.Translucent">            <intent-filter>              <action android:name="android.intent.action.LAUCHER" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </activity>    </application></manifest>  xxxxxxxx.javapackage com.example.android.xxxx; public class fpToolbar extends Activity {     @Override    public void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       requestWindowFeature(Window.FEATURE_NO_TITLE);    LinearLayout layout2;    layout2 = new LinearLayout(this);        Button b = new Button(this);    Button b2 = new Button(this);    layout2.addView(b);    layout2.addView(b2);     layout2.setGravity(Gravity.BOTTOM | Gravity.LEFT);    layout2.setBackgroundDrawable(null);    /* 设置成透明，必须在AndroidManifest.xml中设置android:theme="@android:style/Theme.Translucent" */     b.setText("test pop.");    b2.setText("hello!");     setContentView(layout2);     }}

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