public class MainActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 隱藏標題欄 requestWindowFeature(Window.FEATURE_NO_TITLE); // 隱藏狀態(tài)欄 getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_main); }}

<!-- 同時隱藏狀態(tài)欄和標題欄 --><activity  android:name="com.ysj.demo.MainActivity"  android:theme="@android:style/Theme.NoTitleBar.Fullscreen"  android:label="@string/app_name" >  <intent-filter>    <action android:name="android.intent.action.MAIN" />    <category android:name="android.intent.category.LAUNCHER" />  </intent-filter></activity>

<!-- Application theme. --><style name="AppTheme" parent="AppBaseTheme">  <!-- All customizations that are NOT specific to a particular API-level can go here. -->  <!-- 隱藏狀態(tài)欄 -->  <item name="android:windowFullscreen">true</item>  <!-- 隱藏標題欄 -->  <item name="android:windowNoTitle">true</item></style>

public class StartupActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_startup);  /*  * 隱藏運行Android 4.0以上系統(tǒng)的平板的屏幕下方的狀態(tài)欄  */ try    {      String ProcID = "79";      if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.ICE_CREAM_SANDWICH) ProcID = "42"; // ICS      // 需要root 權限      Process proc = Runtime.getRuntime().exec(new String[] { "su", "-c", "service call activity " + ProcID + " s16 com.android.systemui" }); // WAS      proc.waitFor();    }    catch (Exception ex)    {      Toast.makeText(getApplicationContext(), ex.getMessage(), Toast.LENGTH_LONG).show();    }  } @Override protected void onDestroy() { // TODO Auto-generated method stub /*  * 恢復運行Android 4.0以上系統(tǒng)的平板的屏幕下方的狀態(tài)欄  */ try    {      Process proc = Runtime.getRuntime().exec(new String[] { "am", "startservice", "-n", "com.android.systemui/.SystemUIService" });      proc.waitFor();    }    catch (Exception e)    {      e.printStackTrace();    }  super.onDestroy(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.startup, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) {  case R.id.action_exit:  finish();  break; } return true; }}