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