小编ver*_*x78的帖子

我不明白为什么当设备的方向改变时,为以下代码中的片段claass记录onDestroy两次.有人可以向我解释我做错了什么吗？

public class ExampleActivity extends Activity {

    protected String LOG_TAG = ExampleActivity.class.getSimpleName();

    private FrameLayout mFragmentHolder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LogUtil.i(LOG_TAG, "onCreate");

        setContentView(R.layout.activity_main);

        mFragmentHolder = (FrameLayout) findViewById(R.id.root);

        FragmentManager fm = getFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(mFragmentHolder.getId(),MyFragment.newInstance());
        ft.commit();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        LogUtil.i(LOG_TAG, "onDestroy");
    }

    @Override
    protected void onPause() {
        super.onPause();
        LogUtil.i(LOG_TAG, "onPause");
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        LogUtil.i(LOG_TAG, "onRestoreInstanceState");
    }

    @Override
    protected void onResume() {
        super.onResume();
        LogUtil.i(LOG_TAG, "onResume");
    }

    @Override
    protected void …