TabHost子Activity响应onActivityResult事件

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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);
}

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