Android Studio 运行起来一片空白,不显示控件

原因:onCreate方法写错了,应该重写一个参数的方法写成两个参数了

 

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState, @Nullable PersistableBundle persistentState) {
        super.onCreate(savedInstanceState, persistentState);
        setContentView(getLayoutId());
        receiveData();
        initView();
        initData();
    }

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