我正在尝试向我的应用添加下载功能,我正在使用Glide库从其URL加载图片,并使用下面的代码,我可以保存图片存储到设备存储中,但无法正常工作。
new AsyncTask<FutureTarget<Bitmap>, Void, Bitmap>() {
@Override protected Bitmap doInBackground(FutureTarget<Bitmap>... params) {
try {
return params[0].get();
} catch (Exception ex) {
return null;
}
}
@Override protected void onPostExecute(Bitmap bitmap) {
if(bitmap == null) return;
MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "Art_"+System.currentTimeMillis());
}
}.execute(Glide.with(getApplicationContext()).load(url).asBitmap().diskCacheStrategy(DiskCacheStrategy.SOURCE).into(width, height));
有人可以帮助我解决此问题吗?
1。清单文件中的权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
2。滑行以将图像下载为位图
Glide.with(mContext)
.load("YOUR_URL")
.asBitmap()
.into(new SimpleTarget<Bitmap>(100,100) {
@Override
public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
saveImage(resource);
}
});
3。将位图保存到内存中
private String saveImage(Bitmap image) {
String savedImagePath = null;
String imageFileName = "JPEG_" + "FILE_NAME" + ".jpg";
File storageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
+ "/YOUR_FOLDER_NAME");
boolean success = true;
if (!storageDir.exists()) {
success = storageDir.mkdirs();
}
if (success) {
File imageFile = new File(storageDir, imageFileName);
savedImagePath = imageFile.getAbsolutePath();
try {
OutputStream fOut = new FileOutputStream(imageFile);
image.compress(Bitmap.CompressFormat.JPEG, 100, fOut);
fOut.close();
} catch (Exception e) {
e.printStackTrace();
}
// Add the image to the system gallery
galleryAddPic(savedImagePath);
Toast.makeText(mContext, "IMAGE SAVED", Toast.LENGTH_LONG).show();
}
return savedImagePath;
}
private void galleryAddPic(String imagePath) {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(imagePath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
sendBroadcast(mediaScanIntent);
}
基于Akshay Nandwana的答案,我使用该代码写入内部存储器:
Glide.with(context)
.asBitmap()
.load(url)
.into(new SimpleTarget<Bitmap>() {
@Override
public void onResourceReady(Bitmap resource,Transition<? super Bitmap> transition) {
write(fileName, resource);
}
});
这是write
方法:
public void write(String fileName, Bitmap bitmap) {
FileOutputStream outputStream;
try {
outputStream = context.openFileOutput(fileName, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
outputStream.close();
} catch (Exception error) {
error.printStackTrace();
}
}