Question

我正在尝试拍照并在ImageView中显示。如果我尝试从库中填充ImageView，它可以很好地工作，但如果我使用相机拍照，它就不起作用。

以下是我正在做的事情：

//从相机或图库中选择拍摄

public class ProfileFragment extends Fragment    
.....
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Escolha a Foto");
builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) { // pick from
                                                                // camera
            if (item == 0) {

                Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(takePicture, 0);//zero can be replced with any action code
            } else {
                // pick from file
                Intent pickPhoto = new Intent(Intent.ACTION_PICK,
                           android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(pickPhoto , 1);//one can be replced with any action code
            }
        }
    });
....
}

@Override
public void onActivityResult(int requestCode, int resultCode,
        Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    switch (requestCode) {
    case 0:
        if (resultCode == -1) {
            Uri selectedImage = imageReturnedIntent.getData();
            imageView.setImageURI(selectedImage);
        }

        break;
    case 1:
        if (resultCode == -1) {
            Uri selectedImage = imageReturnedIntent.getData();
            imageView.setImageURI(selectedImage);
        }
        break;
    }
}

private void captureImageInitialization() {

    final String[] items = new String[] { "New Photo",
            "Choose from Gallery" };
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
            android.R.layout.select_dialog_item, items);
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

    builder.setTitle("Choose Photo");
    builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {
            if (item == 0) {
                Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                startActivityForResult(takePicture, 0);//zero can be replced with any action code
            } else {

                Intent pickPhoto = new Intent(Intent.ACTION_PICK,
                           android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(pickPhoto , 1);//one can be replced with any action code
            }
        }
    });

    dialog = builder.create();
}

有什么问题吗？

更新：保存照片后，片段中的方法“onCreateView（）”被调用...这就是ImageView为空的原因...我该如何解决？

UPDATE2：我一直使用相机调用mainActivity中的onCreate（）。

提前致谢。

Answer 1

试试这个

始终使用intent.getExtras().get("data")您需要输入强制转换为Bitmap以从相机中捕获图像。

case 0:
        if (resultCode == Activity.RESULT_OK) {
        Bitmap bitmapImage = (Bitmap) imageReturnedIntent.getExtras().get("data");
        imageView.setImageBitmap(bitmapImage);

        }

        break;
    case 1:
        if (resultCode == Activity.RESULT_OK) {
            Uri selectedImage = imageReturnedIntent.getData();
            imageView.setImageURI(selectedImage);
        }
        break;
    }

Answer 2

还要记住，在getData()返回null的情况下，存在一个错误（主要是在三星设备上注意到，我没有关于它是否已修复的当前信息）。在这种情况下，您需要使用预先插入的Uri：

preinsertedUri = getContentResolver().insert(        
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, new ContentValues());

稍后在onActivityResult()方法：

Uri imageUri = preinsertedUri;

这样我就能阻止某些三星设备上的Uri为空

Answer 3

刚刚在清单中添加了这些行：

android:configChanges="keyboardHidden|orientation|screenSize"

Android - 为什么ImageView是空的？

3 个答案: