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);
}
}
首先你需要在Activity中重写这段代码;
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
之后,在你的片段中,
startActivityForResult(intent,GALLERY_REQUEST_CODE);
在你的片段中,
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// Result code is RESULT_OK only if the user selects an Image
if (resultCode == Activity.RESULT_OK) {
}
}
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
对于嵌套片段(例如,当使用ViewPager时)
在你的主要活动:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
在你的主顶级片段(ViewPager片段)中:
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
YourFragment frag = (YourFragment) getChildFragmentManager().getFragments().get(viewPager.getCurrentItem());
frag.yourMethod(data); // Method for callback in YourFragment
super.onActivityResult(requestCode, resultCode, data);
}
在YourFragment(嵌套片段)中:
public void yourMethod(Intent data){
// Do whatever you want with your data
}
最简单的方法之一是从你的片段开始一个活动。
startActivity(ActivityName);
然后,添加你调用startActivityForResult(intent,"1");在你的Activity中添加onActivityResult
startActivityForResult(intent,"1");
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Fragment fragment = getSupportFragmentManager().findFragmentById(R.id.dualPane);
fragment.onActivityResult(requestCode, resultCode, data);
// perform other activity result like fetching from Uris or handling cursors
finish(); // finish the activity will get to back to your fragment.
}