从另一个活动调用覆盖方法

时间:2015-07-25 10:15:43

标签: java android

我必须使用按钮单击从另一个活动调用接口覆盖方法。在GridActivity类中,我使用了图像按钮。

如果我单击此按钮,我需要调用另一个活动界面覆盖方法。

GridActivity3.java:

public class GridActivity3 extends Activity implements OnClickListener {

 ImageButton btn_home;

  @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_grid3);

        btn_home = (ImageButton) findViewById(R.id.btn_home);

        btn_home.setOnClickListener(this);
     }

    @Override
    public void onClick(View v) {

    switch (v.getId()) {

    case R.id.btn_home:

     break;

     }
    }
   }

ArticleSelectedListener:

public interface ArticleSelectedListener {

    public void onArticleSelected(final int position, final String content);
}

MainActivity.java:

public class MainActivity extends ActionBarActivity implements OnTabChangeListener,ArticleSelectedListener {

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 }

   @Override
    public void onArticleSelected(int position, String content)
    {
        if(position==0)
        {
            action_bar_hometext.setText(content);
            FragmentManager manager = getSupportFragmentManager();
            FragmentTransaction ft = manager.beginTransaction();
            HomeFirstFragment newFragment = new HomeFirstFragment();
            ft.replace(R.id.realtabcontent, newFragment);
            ft.addToBackStack(null);
            ft.commit();
        }
     }

我不知道如何通过按钮点击从另一个活动调用接口方法。任何人都可以帮助我。谢谢。

1 个答案:

答案 0 :(得分:0)

在您的MainActivity中,创建一个公共方法,如下所示......

public void articleSelected(int position, String content)
  {
     if(position==0)
    {
        action_bar_hometext.setText(content);
        FragmentManager manager = getSupportFragmentManager();
        FragmentTransaction ft = manager.beginTransaction();
        HomeFirstFragment newFragment = new HomeFirstFragment();
        ft.replace(R.id.realtabcontent, newFragment);
        ft.addToBackStack(null);
        ft.commit();
    }
  }

然后在Main活动中,用以下内容替换OnArticle中的代码...

articleSelected(position,content);

然后使用相同的方法从GridActivity调用...

     MainActivity main= new MainActivity();
     main.articleSelected(0,"Home");