Android 面試之橫豎屏切換的Activity生命周期

public class EngineerJspActivity extends Activity {
    private static String Tag = "EngineerJspActivity";
	@Override
	protected void onCreate(Bundle savedInstanceState) { 
		super.onCreate(savedInstanceState);
		Log.d(Tag, "onCreate()");
		setContentView(R.layout.activity_main);
	}
	@Override
	protected void onStart() {
		super.onStart();
		Log.d(Tag, "onStart()");
	}
    @Override
    protected void onResume() {
    	super.onResume();
    	Log.d(Tag, "onResume()");
    }
    @Override
    protected void onSaveInstanceState(Bundle outState) {
    	super.onSaveInstanceState(outState);
    	Log.d(Tag, "onSaveInstanceState()");
    }
    @Override
    protected void onPause() {
    	super.onPause();
    	Log.d(Tag, "onPause()");
    }
    @Override
    protected void onStop() {
    	super.onStop();
    	Log.d(Tag, "onStop()");
    }
 @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
    	super.onRestoreInstanceState(savedInstanceState);
    	Log.d(Tag, "onRestoreInstanceState()");
    }
    @Override
    protected void onDestroy() {
    	super.onDestroy();
    	Log.d(Tag, "onDestroy()");
    }

}
②運行Activity(沒有切換屏幕的正常情況下啟動Activity)，得到如下結果：

③切換成橫屏時的Activity生命周期：

④換回豎屏的Activity生命周期：

⑤給清單文件加上android:configChanges="orientation"屬性，重新啟動Activity,沒有切換屏幕時(正常啟動)的生命周期：

⑥加上android:configChanges="orientation"屬性，切換成橫屏，Activity的生命周期：

⑦加上android:configChanges="orientation"屬性，換回豎屏，Activity的生命周期：

⑧加上android:configChanges="orientation"keyboardHidden"屬性，正常啟動Activity的生命周期(未切屏幕)：

⑨加上android:configChanges="orientation"keyboardHidden"屬性，正常啟動Activity的生命周期(切成橫屏)：

⑩加上android:configChanges="orientation"keyboardHidden"屬性，正常啟動Activity的生命周期(換回豎屏)：

執行Home鍵之後的生命周期：