初学者---Android 横竖屏切换生命周期测试

比眉伴天荒 2022-06-04 03:49 252阅读 0赞

Android Studio自带模拟器   android 7.0    api24

测试代码:

public class HengShuPingActivity extends AppCompatActivity {
    
        private static final String TAG = "isRun";
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_heng_shu_ping);
            Log.d(TAG, "-------onCreate: ");
        }
    
        @Override
        protected void onRestart() {
            super.onRestart();
            Log.d(TAG, "--------onRestart: ");
        }
        @Override
        protected void onStart() {
            super.onStart();
            Log.d(TAG, "------onStart: ");
        }
        @Override
        protected void onResume() {
            super.onResume();
            Log.d(TAG, "--------onResume: ");
        }
        
        @Override
        protected void onPause() {
            super.onPause();
            Log.d(TAG, "---------onPause: ");
        }
    
        @Override
        protected void onStop() {
            super.onStop();
            Log.d(TAG, "--------onStop: ");
        }
    
        
        @Override
        protected void onDestroy() {
            super.onDestroy();
            Log.d(TAG, "---------onDestroy: ");
        }
    
    
        @Override
        protected void onSaveInstanceState(Bundle outState) {
            super.onSaveInstanceState(outState);
            Log.d(TAG, "---------onSaveInstanceState");
    
        }
    
        @Override
        protected void onRestoreInstanceState(Bundle savedInstanceState) {
            super.onRestoreInstanceState(savedInstanceState);
            Log.d(TAG, "---------onRestoreInstanceState");
        }
    
        @Override
        public void onContentChanged() {
            super.onContentChanged();
            Log.d(TAG, "-------onContentChanged: ");
        }
    
        // 需在AndroidManifest里注册Activity的configChanges属性
         @Override
         public void onConfigurationChanged(Configuration newConfig) {
             super.onConfigurationChanged(newConfig);
             Log.d(TAG, "onConfigurationChanged");
             if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
                 Log.d(TAG, "当前屏幕切换成横屏显示");
             } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
                 Log.d(TAG, "当前屏幕切换成竖屏显示");
             }
         }
    
    }

AndroidManifest.xml文件;

** 第一次启动:**

12-03 12:12:39.981 2672-2672/com.bwei.text.suanfademo D/isRun: -------onCreate: 
    12-03 12:12:39.982 2672-2672/com.bwei.text.suanfademo D/isRun: ------onStart: 
    12-03 12:12:39.999 2672-2672/com.bwei.text.suanfademo D/isRun: --------onResume:

按Home键（屏幕被隐藏）:

D/isRun: ---------onPause: 
    D/isRun: ---------onSave 
    D/isRun: --------onStop:

此时，直接滑动删除页面(相当于强制关闭程序)，

D/isRun: ---------onDestroy: 
    Application terminated.

再一次启动程序,再次按Home键（屏幕显示出来）:

D/isRun: --------onRestart: 
    D/isRun: ------onStart: 
    D/isRun: --------onResume:

按back键：

D/isRun: ---------onPause: 
    D/isRun: --------onStop: 
    D/isRun: ---------onDestroy:

屏切换为横屏（注册文件什么也没动）：

D/isRun: 当前屏幕切换成横屏显示
    D/isRun: ---------onPause: 
    D/isRun: ---------onSave 
    D/isRun: --------onStop: 
    D/isRun: ---------onDestroy: 
    D/isRun: -------onCreate: 
    D/isRun: ------onStart: 
    D/isRun: ---------onRestore
    D/isRun: --------onResume:

再次切回竖屏：

D/isRun: onConfigurationChanged
    D/isRun: 当前屏幕切换成竖屏显示
    D/isRun: ---------onPause: 
    D/isRun: ---------onSave 
    D/isRun: --------onStop: 
    D/isRun: ---------onDestroy: 
    D/isRun: -------onCreate: 
    D/isRun: ------onStart: 
    D/isRun: ---------onRestore
    D/isRun: --------onResume:

**第一步,在AndroidManifest里添加configChanges的orientation属性**  
切换横屏：

切换竖屏

在第一步的基础上,在configChanges添加多一个keyboardHidden属性  
切换横屏：

切换竖屏：

在第二步的基础上,在configChanges添加多一个screenSize属性  
切换横屏：

D/isRun: onConfigurationChanged
    D/isRun: 当前屏幕切换成横屏显示

切换竖屏;

D/isRun: onConfigurationChanged
    D/isRun: 当前屏幕切换成竖屏显示