打开相机拍照并将其设置在 PopupWindow 的图像视图中 - android

Question

我在 Android 中有一个 PopupWindow，里面有一个 imageview。当我按下 imageview 时，我想打开相机拍照，当我回来为 imageview 的背景设置照片时。

问题是我回来的时候(onActivityResult)，popupwindow是dismiss()，imageView背景是默认的。

imageView@onClick：

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if (cameraIntent.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
                    Log.i(TAG, "IOException");
                }
                // Continue only if the File was successfully created
                if (photoFile != null) {
                    cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
                    startActivityForResult(cameraIntent, CAMERA_REQUEST);
                }
            }

createImageFile() 函数

private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_" + timeStamp + "_";
    File storageDir = Environment.getExternalStoragePublicDirectory(
            Environment.DIRECTORY_PICTURES);
    File image = File.createTempFile(
            imageFileName,  // prefix
            ".jpg",         // suffix
            storageDir      // directory
    );

    // Save a file: path for use with ACTION_VIEW intents
    mCurrentPhotoPath = "file:" + image.getAbsolutePath();

    editor = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE).edit();
    editor.putString("picture_path", mCurrentPhotoPath);
    editor.commit();

    return image;
}

@onActivityResult

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
        try {

            prefs = getSharedPreferences(MY_PREFS_NAME, MODE_PRIVATE);
            mCurrentPhotoPath = prefs.getString("picture_path", null);

            bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
            add_photo.setImageBitmap(bitmap);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

我使用 Sharedpreferences 来避免 mCurrentPhotoPath 上出现 null。

Answer 1

假设问题是 MediaStore.Images.Media.getBitmap 返回 null，这是因为它旨在用于从某些 ContentResolver 中的某些应用程序处理的 URL 中检索图像，而在您的实现中并非如此.

在您的实现中，您将图像存储在设备文件系统上，您可以使用返回位图的BitmapFactorys decodeFile 方法检索它。