Question

子类扩展了父类父类有一些我不想在onCreate()中执行的代码。

我该怎么做？

父：

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (!child)
        {
                ... more code ...
        }
    }
}

子：

public class SingleArticulo extends MainActivity {
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_single_articulo);

        ... other code ...
    }
}

Answer 1

使用Template Method模式。

基类：

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        this.doMoreOnCreate()
    }

    protected void doMoreOnCreate() {
                ... more code ...
    }
}

子：

public class SingleArticulo extends MainActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_single_articulo);

        ... other code ...
    }

    @Override
    protected void doMoreOnCreate() {
    }
}

如何检查一个方法是否由孩子调用？

1 个答案: