android studio Activity生命周期

代码：

public class MainActivity extends AppCompatActivity {
    
    
    private static final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    
    
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.d(TAG, "onCreate: ");
    }

    @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 onRestart() {
    
    
        super.onRestart();
        Log.d(TAG, "onRestart: ");
    }

    @Override
    protected void onDestroy() {
    
    
        super.onDestroy();
        Log.d(TAG, "onDestroy: ");
    }
}

打开–>home键–>再打开
执行结果

打开–>返回键退出

结论得到生命周期流程图

注意点：