来自 Fragment 并完成子 Activity 的 startActivityForResult()，不会在 Fragment 中调用 onActivityResult() [英] startActivityForResult() from a Fragment and finishing child Activity, doesn't call onActivityResult() in Fragment

问题描述

FirstActivity.Java 有一个 FragmentA.Java 调用 startActivityForResult().SecondActivity.Java 调用 finish() 但 onActivityResult 永远不会被调用，这是用 FragmentA.Java 编写.

FirstActivity.Java has a FragmentA.Java which calls startActivityForResult(). SecondActivity.Java call finish() but onActivityResult never get called which is written in FragmentA.Java.

FragmentA.Java 代码:

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    // some code
    Intent i = new Intent(getActivity(), SecondActivity.class);
    i.putExtra("helloString", helloString);
    getActivity().startActivityForResult(i, 1);
  }

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    getActivity();
    if(requestCode == 1 && resultCode == Activity.RESULT_OK) {
       //some code
    }
  }

SecondActivity.Java 代码:

  @Override
  protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       //some code
       Intent returnIntent = new Intent();
       returnIntent.putExtra("result", result);                          

       setResult(Activity.RESULT_OK,returnIntent);     
       finish();
  }

我试过调试代码，但是 onAcitvityResult() 永远不会被调用.

I have tried debugging the code, but onAcitvityResult() never get called.

推荐答案

你必须在你的 FirstActivity.Java 中编写 onActivityResult() 如下

You must write onActivityResult() in your FirstActivity.Java as follows

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);
}

所以这将调用您片段的 onActivityResult()

So this will call your fragment's onActivityResult()

解决方案是将 getActivity().startActivityForResult(i, 1); 替换为 startActivityForResult(i, 1);

the solution is to replace getActivity().startActivityForResult(i, 1); with startActivityForResult(i, 1);

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