捕获的图像不会保存在设备上
Captured image does not get saved on the device
我正在尝试将相机拍摄的图像保存到设备上。但它没有被保存。
//---清单
<uses-permission android:name="ANDROID.PERMISSION.CAMERA" />
<uses-permission android:name="ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE" />
我使用以下代码:
if (resultCode == RESULT_OK) {
if (requestCode == CAMERA_REQUEST) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
try {
Bitmap photo = (Bitmap) data.getExtras().get("data");
File outFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "myimage.jpg");
FileOutputStream fos = new FileOutputStream(outFile);
photo.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
getImages();
看看我在代码中为保存捕获的图像做了什么。
/*************************** Camera Intent Start ************************/
// Define the file-name to save photo taken by Camera activity
String fileName = "Camera_Example.jpg";
// Create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION, "Image capture by camera");
// imageUri is the current activity attribute, define and save it for later usage
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
/**** EXTERNAL_CONTENT_URI : style URI for the "primary" external storage volume. ****/
// Standard Intent action that can be sent to have the camera
// application capture an image and return it.
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
/*************************** Camera Intent End ************************/
}
onActivityResult 方法在这里:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
/*********** Load Captured Image And Data Start ****************/
String imageId = convertImageUriToFile(imageUri, CameraActivity);
// Create and excecute AsyncTask to load capture image
new LoadImagesFromSDCard().execute("" + imageId);
/*********** Load Captured Image And Data End ****************/
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
}
}
}
// 不要使用 data.getData(),因为它 return 在某些设备中为 null。
因此使用光标获取捕获的图像。
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent resultData) {
super.onActivityResult(requestCode, resultCode, resultData);
if (resultData != null) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, null, null, null);
int column_index_data = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToLast();
String imagePath = cursor.getString(column_index_data);
Bitmap bitmapImage = BitmapFactory.decodeFile(imagePath );
imageView.setImageBitmap(bitmapImage );
}
我正在尝试将相机拍摄的图像保存到设备上。但它没有被保存。
//---清单
<uses-permission android:name="ANDROID.PERMISSION.CAMERA" />
<uses-permission android:name="ANDROID.PERMISSION.WRITE_EXTERNAL_STORAGE" />
我使用以下代码:
if (resultCode == RESULT_OK) {
if (requestCode == CAMERA_REQUEST) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
try {
Bitmap photo = (Bitmap) data.getExtras().get("data");
File outFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), "myimage.jpg");
FileOutputStream fos = new FileOutputStream(outFile);
photo.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
getImages();
看看我在代码中为保存捕获的图像做了什么。
/*************************** Camera Intent Start ************************/
// Define the file-name to save photo taken by Camera activity
String fileName = "Camera_Example.jpg";
// Create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION, "Image capture by camera");
// imageUri is the current activity attribute, define and save it for later usage
imageUri = getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
/**** EXTERNAL_CONTENT_URI : style URI for the "primary" external storage volume. ****/
// Standard Intent action that can be sent to have the camera
// application capture an image and return it.
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE);
/*************************** Camera Intent End ************************/
}
onActivityResult 方法在这里:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
/*********** Load Captured Image And Data Start ****************/
String imageId = convertImageUriToFile(imageUri, CameraActivity);
// Create and excecute AsyncTask to load capture image
new LoadImagesFromSDCard().execute("" + imageId);
/*********** Load Captured Image And Data End ****************/
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, " Picture was not taken ", Toast.LENGTH_SHORT).show();
}
}
}
// 不要使用 data.getData(),因为它 return 在某些设备中为 null。
因此使用光标获取捕获的图像。
@Override
protected void onActivityResult(int requestCode, int resultCode,
Intent resultData) {
super.onActivityResult(requestCode, resultCode, resultData);
if (resultData != null) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, null, null, null);
int column_index_data = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToLast();
String imagePath = cursor.getString(column_index_data);
Bitmap bitmapImage = BitmapFactory.decodeFile(imagePath );
imageView.setImageBitmap(bitmapImage );
}