先附上activity生命周期：

试验内容：一个MainActivity（继承自BaseMainActivity）调用SecondActivity（继承自BaseSecondActivity），并back返回MainActivity的顺序。
MainActivity代码如下（其他Activity完全相似）：

public class MainActivity   extends BaseMainActivity   {
   


    private Out a = new Out("MainActivity   before static");
    static{
        Log.i("test", "MainActivity   static part");
    }
    private Out b = new Out("MainActivity   after static");

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i("test", "MainActivity  oncreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected void onStart() {
        Log.i("test", "MainActivity  onstart");
        super.onStart();
    }

    @Override
    protected void onResume() {
        Log.i("test", "MainActivity  onresume");
        super.onResume();
    }

    @Override
    protected void onRestart() {
        Log.i("test","MainActivity  onrestart");
        super.onRestart();
    }

    @Override
    protected void onDestroy() {
        Log.i("test","MainActivity  ondestroy");
        super.onDestroy();
    }

    @Override
    protected void onStop() {
        Log.i("test","MainActivity  onstop");
        super.onStop();
    }

    @Override
    protected void onPause() {
        Log.i("test", "MainActivity  onpause");
        super.onPause();
    }

    @Override
    public void onActivityReenter(int resultCode, Intent data)