Question

我正在尝试从7.0设备上的相机裁剪图像。我已经使用android Intents编写了crop功能，并通过文件提供程序公开了我的文件以避免FileUriExposedException。

问题是在打开相机后，裁剪工具没有显示，在我的imageview中没有显示任何内容。

这是我的裁剪功能代码：

private void cropImage() {

    try {
        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        cropIntent.setDataAndType(uri, "image/*");
        cropIntent.putExtra("crop", "true");
        cropIntent.putExtra("outputX", 200);
        cropIntent.putExtra("outputY", 200);
        cropIntent.putExtra("aspectX", 1);
        cropIntent.putExtra("aspectY", 1);
        cropIntent.putExtra("scale", true);
        cropIntent.putExtra("return-data", true);

        startActivityForResult(cropIntent, CROP_CODE);
    } catch (ActivityNotFoundException aex) {
        aex.printStackTrace();
        Toast.makeText(this, "Current Device Has No Crop Support", Toast.LENGTH_LONG).show();
    }

}

和我的相机意图代码在这里：

private void photoDialog() {
    final CharSequence[] imgOptions = {"Take Photo", "Select from Gallery"};

    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Choose Image Options");
    builder.setItems(imgOptions, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            if (imgOptions[i].equals("Take Photo")) {
                try {
                    Intent camIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                    file = new File(Environment.getExternalStorageDirectory(), "tmp_" + String.valueOf(System.currentTimeMillis()));
                    Log.d("MainActivity", "File Saved in:\t" + file.getAbsolutePath().toString());

                    if (Build.VERSION.SDK_INT > 23) {
                        uri = FileProvider.getUriForFile(MainActivity.this, getString(R.string.file_prov_authority), file);
                    } else {
                        uri = Uri.fromFile(file);
                    }

                    camIntent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
                    camIntent.putExtra("return-data", "true");
                    startActivityForResult(camIntent, CAM_CODE);

                } catch (ActivityNotFoundException ex) {
                    ex.printStackTrace();
                }
            } else if (imgOptions[i].equals("Select from Gallery")) {
                Intent galIntent = new Intent(Intent.ACTION_GET_CONTENT, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(Intent.createChooser(galIntent, "Open With"), GAL_CODE);
            }
        }
    });

当我尝试直接从相机位图设置imageview时，我也得到了这个例外：

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Parcelable android.os.Bundle.getParcelable(java.lang.String)' on a null object reference

我的活动结果代码：

 @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CAM_CODE && resultCode == RESULT_OK) {
        Bitmap bitmap = (Bitmap) data.getExtras().get("data");
        img_camera.setImageBitmap(bitmap);
        cropImage();
    }

    else if (requestCode == GAL_CODE && resultCode == RESULT_OK) {
        if (data != null) {
            uri = data.getData();
            img_camera.setImageURI(uri);
            cropImage();
        }
    }

    else if (requestCode == CROP_CODE) {
        Bundle photo_extras = data.getExtras();
        Bitmap bitmap = photo_extras.getParcelable("data");

        img_camera.setImageBitmap(bitmap);

    }

}

来自图库代码的我的作品虽然功能相同但效果很好。

任何人都可以帮助我在Nougat设备上裁剪相机图像，因为我已经抓取了每个博客和YT视频和ntn到目前为止工作。感谢。

Answer 1

我认为你的问题在于你的形象名称。尝试使用.jpg命名为：

file = new File(Environment.getExternalStorageDirectory(), "tmp_" + String.valueOf(System.currentTimeMillis()) + ".jpg");

你的错误异常来自这一行：

Bitmap bitmap = (Bitmap) data.getExtras().get("data");

将其更改为：

Bundle bundle = data.getExtras();
Bitmap bitmap = bundle.getParcelable("data");

如果它不起作用，请尝试我的代码（这对我有用。我希望它对你也有用）：

//Define constants:
private static final int PERMISSION_CAMERA_CODE = 1;
private static final int PERMISSION_STORE_CODE = 2;
private static final int REQUEST_CODE_TAKE_IMAGE = 3;
private static final int REQUEST_CODE_CHOOSE_IMAGE = 4;
private static final int REQUEST_CODE_CROP_AVATAR = 5;
private static final int REQUEST_CODE_CROP_COVER = 6;


private void openCamera() {

    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra("android.intent.extras.CAMERA_FACING", 1);

    file = new File(Environment.getExternalStorageDirectory(), "file" + String.valueOf(System.currentTimeMillis()) + ".jpg");
    uri = Uri.fromFile(file);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
    intent.putExtra("return-data", true);

    startActivityForResult(intent, REQUEST_CODE_TAKE_IMAGE);
}

private void openGallery() {

    Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(Intent.createChooser(intent, "Select image from your gallery"), REQUEST_CODE_CHOOSE_IMAGE);

}

然后：

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

    if (requestCode == REQUEST_CODE_TAKE_IMAGE && resultCode == Activity.RESULT_OK) {
        cropImage();

    } else if (requestCode == REQUEST_CODE_CHOOSE_IMAGE && resultCode == Activity.RESULT_OK) {
        if (data != null) {
            uri = data.getData();
            cropImage();

        }

    } else if (requestCode == REQUEST_CODE_CROP_AVATAR && resultCode == Activity.RESULT_OK) {

        if (data != null) {

            Bundle bundle = data.getExtras();
            Bitmap bitmap = bundle.getParcelable("data");

            ivAvatar.setImageBitmap(bitmap);
        }

    }
}

private void cropImage() {
    Intent cropIntent = new Intent("com.android.camera.action.CROP");

    cropIntent.setDataAndType(uri, "image/*");
    cropIntent.putExtra("crop", true);
    cropIntent.putExtra("outputX", 180);
    cropIntent.putExtra("outputY", 180);

    cropIntent.putExtra("aspectX", 3);
    cropIntent.putExtra("aspectY", 3);
    cropIntent.putExtra("scaleUpIfNeeded", true);
    cropIntent.putExtra("return-data", true);
    startActivityForResult(cropIntent, REQUEST_CODE_CROP_AVATAR);

}

相机动作 - 裁剪不工作牛轧糖

1 个答案: