Android隐藏状态栏和标题栏，相当于全屏效果

隐藏标题栏需要使用预定义样式：android:theme=”@android:style/Theme.NoTitleBar”.

隐藏状态栏：android:theme=”@android:style/Theme.NoTitleBar.Fullscreen”.

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<manifest xmlns:android=\"http://schemas.android.com/apk/res/android\"
      package=\"de.vogella.android.temperature\"
      android:versionCode=\"1\"
      android:versionName=\"1.0\">
    <application android:icon=\"@drawable/icon\" android:label=\"@string/app_name\">
        <activity android:name=\".Convert\"
                  android:label=\"@string/app_name\"
                   android:theme=\"@android:style/Theme.NoTitleBar.Fullscreen\" >
            <intent-filter>
                <action android:name=\"android.intent.action.MAIN\" />
                <category android:name=\"android.intent.category.LAUNCHER\" />
            </intent-filter>
        </activity>
 
    </application>
    <uses-sdk android:minSdkVersion=\"9\" />
 
</manifest>

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // hide titlebar of application
    // must be before setting the layout
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    // hide statusbar of Android
    // could also be done later
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.main);
    text = (EditText) findViewById(R.id.EditText01);
 
}