Question

从片段我开始使用FirstActivity，从FirstActivity开始我创建了SecondActivity.how我可以从SecondActivity获取片段中的onActivityResult。我试图在firstActivity中添加android：noHistory =“true”。

有没有办法实现这个目标？提前致谢

FragmentActivity

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
    hotelImageMain.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent intent = new Intent(myContext, HotelsByLocation.class);
        intent.putExtra(HotelActivity.EXTRA_PARAM_FOR_RESULT, true);
        intent.putExtra(HotelsByLocation.EXTRA_PARAM_LOCATION_NAME, App.getInstance().getDayList().get(AddHotels.viewPager.getCurrentItem()).get(App.HASHMAP_PARA_CITY_NAME));
        intent.putExtra(HotelsByLocation.EXTRA_PARAM_LOCATION_ID, App.getInstance().getDayList().get(AddHotels.viewPager.getCurrentItem()).get(App.HASHMAP_PARA_CITY_ID));
        startActivityForResult(intent, MY_REQUEST_CODE_TWO);
     }
 });


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

      if (requestCode == MY_REQUEST_CODE_TWO) {
                  if (resultCode == Activity.RESULT_OK) {
                      Toast.makeText(myContext, "Welcome Back from HotelsByLocation", Toast.LENGTH_SHORT).show();
                      HashMap<String, String> map = new HashMap<String, String>();
                      map.put(App.HASHMAP_PARA_CITY_NAME, data.getStringExtra("cname"));
                      map.put(App.HASHMAP_PARA_CITY_ID, data.getStringExtra("cid"));
                      map.put(App.HASHMAP_PARA_HOTEL_NAME, data.getStringExtra("name"));
                      map.put(App.HASHMAP_PARA_HOTEL_IMAGE, data.getStringExtra("img"));
                      App.getInstance().getDayList().set(AddHotels.viewPager.getCurrentItem(),map);
                      hotel_name_main.setText(data.getStringExtra("name"));
                      Picasso.with(myContext)
                              .load(data.getStringExtra("img"))
                              .error(R.drawable.ic_empty)
                              .placeholder(R.drawable.ic_empty)
                              .into(hotelImageMain);

      }
      } else if (resultCode == Activity.RESULT_CANCELED) {
          // some stuff that will happen if there's no result
          Toast.makeText(myContext, "you haven't selected", Toast.LENGTH_SHORT).show();
      }
  }

FirstActivity

mmAdapter.setOnItemClickListener(new HATwo.OnItemClickListener() {
    @Override
    public void onItemClick(View view, int position) {
       Intent intent = new Intent(FirstActivity.this,SecondActivity.class);                             
       intent.putExtra(MyActivity.EXTRA_PARAM_HOTEL_ID, mPhotosList.get(position).getId());                      
       intent.putExtra(MyActivity.EXTRA_PARAM_HOTEL_NAME, mPhotosList.get(position).getTitle());                                    
       intent.putExtra(HotelActivity.EXTRA_PARAM_FOR_RESULT, true);
      //startActivityForResult(intent, MY_REQUEST_CODE_TWO);
       startActivity(intent);

SecondActivity

public void onClick(View v) {
    Intent intent = new Intent();
    intent.putExtra("name",nameOfTheHotel );
    intent.putExtra("id", hotelId);
    setResult(Activity.RESULT_OK, intent);
    finish();
}

Answer 1

您可能希望将startActivity从fragment用于firstactivity，然后将startActivityForResult从firstactivity用于secondactivity。当您从第二个活动中获得结果时，您可以在第一个活动的onActivityResultResult上处理它，并使用intent从第一个活动转到碎片，并将从第二个活动获得的值传递给第一个活动的碎片。确保正确处理后台堆。

Answer 2

首先取消注释

startActivityForResult(intent, MY_REQUEST_CODE_TWO);

来自onItemClick的{{1}}方法和评论

FirstActivity

在//startActivity(intent);

中添加此onActivityResult

FirstActivity

说明：

@Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == MY_REQUEST_CODE_TWO) { Intent intent = new Intent(); intent.putExtra("name", data.getExtras().getString("name")); intent.putExtra("id", data.getExtras().getString("id")); setResult(Activity.RESULT_OK, intent); finish(); } }的结果将发送至SecondActivity，FirstActivity的结果将发送至FirstActivity

Answer 3

通过调用将活动结果值从活动传递到片段->

@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
            for (Fragment fragment : getSupportFragmentManager().getFragments()) {
                if (fragment != null) {
                    fragment.onActivityResult(requestCode, resultCode, data);
                }
            }
    }
}

然后在片段中调用活动结果

 @Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Log.e("onF**kingHere*frg", String.valueOf(requestCode) + " " + resultCode);
}

我如何从secondActivity获取片段中的onActivityResult

3 个答案: