Activity 的 LifeCycle

1. 生命周期，MainActivity.java

public class MainActivity extends AppCompatActivity {
    private String TAG = "MyTag";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Log.i(TAG, "onCreate: ");
        //finish();
    }

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

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

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

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

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

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