在TabHost的子Activity中startActivityForResult调用其他Activity时候遭遇到onActivityResult方法不响应的问题.

解决办法如下:

1.通过父Activity启动其他Activity;

2.实现父Activity的onActivityResult方法,将该处接收到的请求转发给当前活动的子Activity;

3.自定义一个转发接口用来实现第2步中的转发功能;(需要新建一个接口文件)

4.子Activity中实现第3步接口中的方法用来接收返回信息;

 

代码如下:

1.通过父Activity启动其他Activity(此页面为TabHost的子页面之一(如Tab1Activity.class)

1 getParent().startActivityForResult(new Intent(this,ChildActivity.class), REQUEST_CODE); 

 

2.实现父Activity的onActivityResult方法(此方法需继承ActivityGroup)

 1 @Override
 2     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 3         // 获取当前活动的Activity实例
 4         Activity subActivity = getLocalActivityManager().getCurrentActivity();
 5         //判断是否实现返回值接口
 6         if (subActivity instanceof OnTabActivityResultListener) {
 7             //获取返回值接口实例
 8             OnTabActivityResultListener listener = (OnTabActivityResultListener) subActivity;
 9             //转发请求到子Activity
10             listener.onTabActivityResult(requestCode, resultCode, data);
11         }
12         super.onActivityResult(requestCode, resultCode, data);
13     }

另一种继承Activity的调用方法如下：

1）先在onCreate中调用：

protected LocalActivityManager mLocalActivityManager;//定义当前活动对象列表

 //继承Activity
  mTabHost = (TabHost) findViewById(R.id.tabhost);
  // 注意下面这段  
  mLocalActivityManager = new LocalActivityManager(this, true);  //注意true表示singleMode为true,如果为false,则mLocalActivityManager.getCurrentActivity()会取不到对象
        mLocalActivityManager.dispatchCreate(savedInstanceState); 
        mTabHost.setup(mLocalActivityManager); 

 @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // 获取当前活动的Activity实例
  
        Activity subActivity =mLocalActivityManager.getCurrentActivity();
        //subActivity = mLocalActivityManager.getActivity("TabsActivity");
        //判断是否实现返回值接口
        if (subActivity instanceof TabActivityResultListener) {
            //获取返回值接口实例
            TabActivityResultListener listener = (TabActivityResultListener) subActivity;
            //转发请求到子Activity
            listener.onTabActivityResult(requestCode, resultCode, data);
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

 

3.自定义接口(新建的接口文件名为:TabHostResultListener.java,内容如下：

/**
 * 解决子Activity无法接收Activity回调的问题
 * @author Administrator
 *
 */
public interface OnTabActivityResultListener {
    public void onTabActivityResult(int requestCode, int resultCode, Intent data);
}

4.子Activity需要实现onTabActivityResult方法(页面名称如：ChildActivity.java)

@Override
    public void onTabActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE && resultCode == RESULT_OK) {
            //实现该处逻辑

　　　　　　　　...
        }
    }