android - 如何配置 ACTION_IMAGE_CAPTURE 将照片存储在公共外部存储中？

Question

简单的拍照文档建议将使用设备相机拍摄的图像存储为“应该保存在设备上的公共外部存储中”。但是如何做到这一点？提供的示例显示了如何保存到私人文件夹！？

Answer 1

提供的示例显示了如何保存到私人文件夹！？

不，不是的。它显示了如何保存到getExternalFilesDir(). 这是用户可以访问的外部存储的一部分。

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)如果您愿意，也欢迎您在 下创建一个子目录。但是，您将需要WRITE_EXTERNAL_STORAGE所有 API 级别，包括需要在 Android 6.0+ 上设置运行时权限。

Answer 2

看到这段代码它肯定会帮助你：

私人无效选择图像（）{

    final CharSequence[] options = {"Take Photo", "Choose from Gallery"};

    AlertDialog.Builder builder = new AlertDialog.Builder(Maintenance.this);
    builder.setTitle("Add Photo!");
    builder.setNegativeButton("Cancle", new DialogInterface.OnClickListener() {

        @Override
        public void onClick(DialogInterface dialog, int which) {

            dialog.dismiss();
        }
    });
    builder.setItems(options, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int item) {
            if (options[item].equals("Take Photo")) {
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                File f = new File(android.os.Environment.getExternalStorageDirectory(), "temp.jpg");
                intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
                startActivityForResult(intent, 1);
            } else if (options[item].equals("Choose from Gallery")) {
                Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, 2);

            } /*else if (options[item].equals("Cancel")) {
                dialog.dismiss();
            }*/
        }
    });
    builder.show();
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if (requestCode == 1) {
            File f = new File(Environment.getExternalStorageDirectory().toString());

            for (File temp : f.listFiles()) {
                if (temp.getName().equals("temp.jpg")) {
                    f = temp;
                    break;
                }
            }
            try {
                Bitmap bitmap;
                BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();

                bitmap = BitmapFactory.decodeFile(f.getAbsolutePath(),
                        bitmapOptions);
                bitmap = Bitmap.createScaledBitmap(bitmap, 450, 450, false);
                ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
                // byte[] imageBytes = bytes.toByteArray();
                // encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);

                Camera.setImageBitmap(bitmap);

                String path = android.os.Environment
                        .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsolutePath();
                f.delete();
                OutputStream outFile = null;
                file = new File(path, String.valueOf(System.currentTimeMillis()) + ".jpg");
                //file.getPath();
                // String str = FileUtils.readFileToString(file, "UTF-8");
                image = file.getPath();
                String[] parts = image.split("/");
                encodedImage = parts[parts.length - 1];
                try {
                    outFile = new FileOutputStream(file);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 85, outFile);
                    outFile.flush();
                    outFile.close();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (requestCode == 2) {

            Uri selectedImage = data.getData();
            String[] filePath = {MediaStore.Images.Media.DATA};
            Cursor c = getContentResolver().query(selectedImage, filePath, null, null, null);
            c.moveToFirst();
            int columnIndex = c.getColumnIndex(filePath[0]);
            picturePath = c.getString(columnIndex);
            c.close();
            Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));
            thumbnail = Bitmap.createScaledBitmap(thumbnail, 450, 450, false);
            ByteArrayOutputStream bytes = new ByteArrayOutputStream();
            thumbnail.compress(Bitmap.CompressFormat.JPEG, 85, bytes);
            //  byte[] imageBytes = bytes.toByteArray();
            // encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
            image = picturePath;
            String[] parts = picturePath.split("/");
            encodedImage = parts[parts.length - 1];
            Camera.setImageBitmap(thumbnail);
        }
    }
} 

Answer 3

尝试这个

//Click Picture from camera
        camera_image.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                ContentValues values = new ContentValues();
                values.put(MediaStore.Images.Media.TITLE, "New Picture");
                values.put(MediaStore.Images.Media.DESCRIPTION, "From your Camera");
                imageUri = getContentResolver().insert(
                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, CAMERA_CLICK_RESULT);

            }


        });

结果如下

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

    //Get Image from Camera
    if (requestCode == CAMERA_CLICK_RESULT && resultCode == RESULT_OK) {

        Bitmap photo = null;
        try {
            photo = MediaStore.Images.Media.getBitmap(
                    getContentResolver(), imageUri);
        } catch (IOException e) {
            e.printStackTrace();
        }
        selectedImage = getResizedBitmap(photo, 900);


        try {
            //Write file
            String filename = "/file_name";
            String dir_path = "Directory_Path";
            File file = new File(dir_path)
            file.mkdir();
            FileOutputStream fileOutputStream = new FileOutputStream(dir_path + filename);
            selectedImage.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);

            //Cleanup
            fileOutputStream.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

//Resize Bitmap
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
    int width = image.getWidth();
    int height = image.getHeight();

    float bitmapRatio = (float) width / (float) height;
    if (bitmapRatio > 1) {
        width = maxSize;
        height = (int) (width / bitmapRatio);
    } else {
        height = maxSize;
        width = (int) (height * bitmapRatio);
    }
    return Bitmap.createScaledBitmap(image, width, height, true);
}

Answer 4

动作图像捕捉方法：

// OPEN CAMERA & TAKE PIC
private void dispatchTakePictureIntent() {

    try {

        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        // Ensure that there's a camera activity to handle the intent
        if (takePictureIntent.resolveActivity(getPackageManager()) != null) {

            // Create the File where the photo should go
            //File photoFile = null;

            try {
                photoFile = createImageFile();
            } catch (IOException ex) {
                // Error occurred while creating the File
                ex.printStackTrace();
                Log.e("takePic_IO_EX", ex + "");
            }

            //photoFile = createImageFile();

            // Continue only if the File was successfully created
            if (photoFile != null) {

                Uri photoURI = FileProvider.getUriForFile(this,
                        "com.example.appname.fileprovider",
                        photoFile);


                List<ResolveInfo> resInfoList = this.getPackageManager().queryIntentActivities(takePictureIntent, PackageManager.MATCH_DEFAULT_ONLY);
                for (ResolveInfo resolveInfo : resInfoList) {
                    String packageName = resolveInfo.activityInfo.packageName;
                    this.grantUriPermission(packageName, photoURI, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
                }
                /*takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                this.setResult(RESULT_OK, takePictureIntent);*/


                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
                startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
            }
        }

    } catch (Exception e) {
        e.printStackTrace();
        Log.e("takePic_main_EX", e + "");
    }

}

活动：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {

        try {

            /*Log.e("mCurrentPhotoPath", mCurrentPhotoPath);
            Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath);
            Log.e("displayPic", "2");
            attendanceCameraBtn.setImageBitmap(bitmap);
            Log.e("displayPic", "3");*/

            try {
                if (photoFile.getAbsoluteFile().getTotalSpace() <= 10) {
                    //Log.e("fileSize==2==", photoFile.getTotalSpace() + "    ++++");
                    if (photoFile.isFile()) {
                        if (photoFile.exists()) {
                            photoFile.delete();
                            Toast.makeText(getApplicationContext(), "Photo Capture Failed, Please Retry!", Toast.LENGTH_LONG).show();
                        }
                    }

                } else {


                            //Do whatever you want here
                        }
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
                Log.e("file", e + "");
            }

        } catch (Exception e) {
            e.printStackTrace();
            Log.e("displayPic_EX", e + "");
            Log.e("onActivityResult_EX", e + "");
        }
    } else {

        try {
            if (photoFile.isFile()) {
                if (photoFile.exists()) {
                    photoFile.delete();
                    Toast.makeText(getApplicationContext(), "Photo Capture Cancelled!", Toast.LENGTH_LONG).show();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("onActivityResult_els_EX", e + "");
        }
    }
}

在方法中创建图像目录和图像文件private folder：

 private File createImageFile() throws IOException {

    // Create an image file name
    Random generate = new Random();
    int n = 10000;
    n = generate.nextInt(n);

    String nValue = String.valueOf(n);
    String fName = "Image-" + n;


    String filePath = getExternalFilesDir(Environment.DIRECTORY_PICTURES).toString();
    File dir = new File(filePath + "/app_images");

    if (!dir.exists()) {
                dir.mkdirs();
            }

    File image = File.createTempFile(
            fName,          /* prefix */
            ".jpg",         /* suffix */
            dir      /* directory */
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = image.getAbsolutePath();
    Log.e("mCurrentPhotoPath", mCurrentPhotoPath + "  ++++"); //Prints you the image file path
    return image;
}



try {
                photoFile = createImageFile();
            } catch (IOException ex) {
                // Error occurred while creating the File
                ex.printStackTrace();
                Log.e("takePic_IO_EX", ex + "");
            }

xml并在您的文件夹内创建一个名为的res文件夹。在该xml文件夹中，创建一个xml file并命名它file_paths.xml。里面提这个路径file_paths.xml

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="Images" path="Android/data/" />
</paths>

File photoFile在全球范围内声明。一切顺利！