TabHost子Activity響應onActivityResult事件

TabHost主Activity部分代碼：

public class MainActivity extends Activity {//此處不需要繼承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);//擷取TabHost

Intent intent;

TabSpec spec;

//LocalActivityManager的第二個參數一定要設定為true，不然将無法擷取到目前的子Activity，也就無法響應子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();  // 擷取目前活動的Activity執行個體

   //判斷是否實作傳回值接口   

   if (subActivity instanceof OnTabActivityResultListener) {  

       //擷取傳回值接口執行個體   

       OnTabActivityResultListener listener = (OnTabActivityResultListener) subActivity;  

       //轉發請求到子Activity   

       listener.onTabActivityResult(requestCode, resultCode, data);  

   }

}

}

子Activity代碼：

public class Tabone extends Activity implements OnTabActivityResultListener {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_tabone);

//省略調用外部Intent的代碼，如調用系統相機

//子Activity要使用getParent().startActivityForResult來啟動外部Intent，如下代碼:

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

}

@Override

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

//此處響應外部Intent的事件，從主Activity中傳過來

}

}

接口OnTabActivityResultListener部分代碼：

public interface OnTabActivityResultListener {

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

}