TabHost子Activity响应onActivityResult事件

TabHost主Activity部分代码：

public class MainActivity extends Activity {//此处不需要继承TabActivity

private TabHost tabHost;

LocalActivityManager mLocalActivityManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

tabHost=(TabHost) findViewById(R.id.tabhostTest);//获取TabHost

Intent intent;

TabSpec spec;

//LocalActivityManager的第二个参数一定要设置为true，不然将无法获取到当前的子Activity，也就无法响应子Activity的事件

mLocalActivityManager=new LocalActivityManager(this,true);

mLocalActivityManager.dispatchCreate(savedInstanceState);

        tabHost.setup(mLocalActivityManager);

        intent=new Intent(this,Tabone.class);

spec=tabHost.newTabSpec("tab1").setIndicator("tab1").setContent(intent);

tabHost.addTab(spec);

intent=new Intent(this,Tabtwo.class);

spec=tabHost.newTabSpec("tab2").setIndicator("tab2").setContent(intent);

tabHost.addTab(spec);

}

@Override

protected void onActivityResult(int requestCode, int resultCode,

Intent data) {   

   @SuppressWarnings("deprecation")

Activity subActivity = mLocalActivityManager.getCurrentActivity();  // 获取当前活动的Activity实例

   //判断是否实现返回值接口   

   if (subActivity instanceof OnTabActivityResultListener) {  

       //获取返回值接口实例   

       OnTabActivityResultListener listener = (OnTabActivityResultListener) subActivity;  

       //转发请求到子Activity   

       listener.onTabActivityResult(requestCode, resultCode, data);  

   }

}

}

子Activity代码：

public class Tabone extends Activity implements OnTabActivityResultListener {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_tabone);

//省略调用外部Intent的代码，如调用系统相机

//子Activity要使用getParent().startActivityForResult来启动外部Intent，如下代码:

//mActivity.getParent().startActivityForResult(intent, Constant.IMAGE_CAPTURE_REQUEST);

}

@Override

public void onTabActivityResult(int requestCode, int resultCode, Intent data) {

//此处响应外部Intent的事件，从主Activity中传过来

}

}

接口OnTabActivityResultListener部分代码：

public interface OnTabActivityResultListener {

public void onTabActivityResult(int requestCode, int resultCode, Intent data); 

}