Question

我有一个片段，我正在调用getActivity().startActivityForResult进行相机活动，我onActivityResult中有MainActivity来处理结果。

片段

Intent intent = new Intent();

intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 250);
intent.putExtra("outputY", 250);
try {
    intent.putExtra("return-data", true);
    getActivity().startActivityForResult(Intent.createChooser(intent,"Complete action using"), PICK_FROM_GALLERY);
} catch (ActivityNotFoundException e) {
   // Do nothing for now
}

MainActivity

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


if (resultCode == RESULT_CANCELED) //CANCELED
{
    Toast.makeText(this, "canceled", Toast.LENGTH_SHORT).show();
}

switch (requestCode) {
    case PICK_FROM_GALLERY:


        Toast.makeText(this, "Pick from Gallery", Toast.LENGTH_SHORT).show();
            if (resultCode == RESULT_OK) {

                Toast.makeText(this, "Result Okay", Toast.LENGTH_SHORT).show();
                Bundle extras2 = data.getExtras();
                if (extras2 != null) {
                    //Doesn't enter here
                } else {
                    Toast.makeText(this, "extra is null", Toast.LENGTH_SHORT).show();
                }
            }
            break;

    }
}

Answer 1

活动@Oncreate打开相机意图

// Camera Option Clicked    
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, 1);

处理onActivityResult

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

    switch (requestCode) {
    case 1:

        if(resultCode == RESULT_OK){

            if (data != null) {

                takePhoto(data);
            }
        }

        break;
    }

}

在ImageView上显示图像

private void takePhoto(Intent imageData){
    Bundle extras = imageData.getExtras();

    if(extras != null){
        imageView.setImageBitmap((Bitmap) extras.get("data"));
    }
}

Answer 2

更改此行

getActivity().startActivityForResult(Intent.createChooser(intent,"Complete action using"), PICK_FROM_GALLERY);

到

startActivityForResult(Intent.createChooser(intent,"Complete action using"), PICK_FROM_GALLERY);

请参阅此信息以获取更多信息onActivityResult is not being called in Fragment

Intent intent = new Intent();
                intent.setType("image/*");
                intent.setAction(Intent.ACTION_PICK);
startActivityForResult(Intent.createChooser(intent, "Select Picture"),
                        112);
if (requestCode == 112) {
        try {
            InputStream inputStream = getContentResolver()
                    .openInputStream(data.getData());
            FileOutputStream fileOutputStream = new FileOutputStream(
                    mFileTemp);
            copyStream(inputStream, fileOutputStream);// do other stuff
            fileOutputStream.close();
            inputStream.close();
            //do other stuff
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Answer 3

您应该致电startActivityForResult()而不是getActivity().startActivityForResult()

在Parent Activity类中，覆盖onActivityResult（）方法，甚至在Fragment Class中覆盖它，并调用以下代码。

在父类中：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Fragment fragment = getSupportFragmentManager().findFragmentById(R.id....);
    fragment.onActivityResult(requestCode, resultCode, data);
}

在儿童班：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   //in fragment class callback
}

Answer 4

你应该打电话来自你的片段的startActivityForResult(Intent.createChooser(intent,"Complete action using"), PICK_FROM_GALLERY);，然后在你的Fragment本身中实现onActivityResult（），并在onActivityResult（）中检查结果代码为

public void onActivityResult（int requestCode，int resultCode，Intent data）{ if（resultCode == Activity.RESULT_OK）{ if（requestCode == PICK_FROM_GALLERY）{

对于片段

4 个答案: