当相机活动返回时,承载这个片段的活动有它的onActivityResult被调用。

我的片段开始一个活动的结果与意图发送给相机拍照。图片应用程序加载正常,拍摄照片并返回。然而onActivityResult从未被击中。我设置了断点,但什么都没有触发。一个片段可以有onActivityResult吗?我想是的,因为它是一个已提供的函数。为什么这个没有被触发?

ImageView myImage = (ImageView)inflatedView.findViewById(R.id.image);
myImage.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(cameraIntent, 1888);
    }
});

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if( requestCode == 1888 ) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");
        ((ImageView)inflatedView.findViewById(R.id.image)).setImageBitmap(photo);
    }
}

当前回答

Kotlin版本(在你的活动onActivityResult()中)

 override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    //add following lines in your activity
    if(supportFragmentManager?.fragments!=null && supportFragmentManager?.fragments!!.size>0)
     for (i in 0..supportFragmentManager?.fragments!!.size-1) {
         val fragment= supportFragmentManager?.fragments!!.get(i)
         fragment.onActivityResult(requestCode, resultCode, data)
    }
 }

其他回答

我只是做了一个变通方法:

public static Fragment _tempFragment = null;
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(_tempFragment != null)
        _tempFragment.onActivityResult(requestCode, resultCode, data);
}

在Fragment中,在startActivityResult之前,设置

MainActivity._tempFragment = this;

在片段中的onActivityResult <——之后

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

     // Do your job
     {

     }
     MainActivity._tempFragment = null;
}

我也面临着同样的问题,一旦我把这段代码从一个片段转移到一个实用工具类,将parentActivity作为参数传递,

Intent intent = new Intent(parentActivity, CameraCaptureActivity.class);
parentActivity.startActivityForResult(intent,requestCode);

然后我没有得到任何值在onActivityResult方法的片段, 之后,我把参数改为Fragment,所以修改后的method定义是这样的,

Intent intent = new Intent(fragment.getContext(), CameraCaptureActivity.class);
fragment.startActivityForResult(intent,requestCode);

在那之后,我能够在片段上的onActivityResult中获得值

对于那些使用Android导航组件的人来说,Kotlin版本的灵感来自Mohit Mehta的答案

 override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    supportFragmentManager.primaryNavigationFragment?.childFragmentManager?.fragments?.forEach { fragment ->
        fragment.onActivityResult(requestCode, resultCode, data)
    }
}

对于那些使用Android导航组件的人,应该在Activity的onActivityResult(…)中使用primaryNavigationFragment来获取它的片段引用,并调用fragment的fragment.onActivityResult(…)

下面是Activity的onActivityResult(…)

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

    for (Fragment fragment : getSupportFragmentManager().getPrimaryNavigationFragment().getChildFragmentManager().getFragments())
    {
            fragment.onActivityResult(requestCode, resultCode, imageData);
    }
}

其他答案中没有描述的另一个用例:

当使用exception.startResolutionForResult()时,在fragment中声明的onActivityResult()不会被调用:

if (exception is ResolvableApiException) {
    exception.startResolutionForResult(activity!!, MY_REQUEST_CODE)
}

在这种情况下,将exception.startResolutionForResult()替换为fragment的startIntentSenderForResult():

if (exception is ResolvableApiException) {
    startIntentSenderForResult(exception.resolution.intentSender, MY_REQUEST_CODE, null, 0, 0, 0, null)
}