我正在使用这个代码来共享一个图像:
File file = ImageLoader.getInstance().getDiskCache().get(imageUrl);
if (file != null && file.exists()) {
Uri uri = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_TEXT, "Hello");
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.setType("image/*");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
context.startActivity(Intent.createChooser(intent, "Send"));
} else {
Toast.makeText(context, "Image cannot be shared", Toast.LENGTH_SHORT).show();
}
我之前使用了ui来加载图像,所以mageLoader.getInstance().getDiskCache().get(imageUrl);
从磁盘缓存返回图像文件。
Gmail, Hangouts, Messages, Drive等可以抓取文件,但在Google+上,抓取不到,而Whatsapp说"不支持这种格式"。但是,如果我将文件保存到下载文件夹并通过Gallery应用程序共享,那么Google+和Whatsapp都会选择相同的图像。
您可以尝试将文件保存到外部缓存,它对我有效。Glide
:
Intent sendIntent = new Intent();
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.setType("image/*");
Glide.with(getContext())
.load("http://...url.here...")
.asBitmap()
.into(new SimpleTarget<Bitmap>(500, 500) {
@Override
public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
try {
File file = new File(getContext().getExternalCacheDir(), "file_to_share.png");
file.getParentFile().mkdirs();
FileOutputStream out = new FileOutputStream(file);
resource.compress(Bitmap.CompressFormat.PNG, 90, out);
out.close();
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
getContext().startActivity(Intent.createChooser(sendIntent, ""));
} catch (IOException e) {
Log.e("Share", e.getMessage(), e);
} finally {
}
}
});
如果您正在使用通用图像加载器,我应用了接受的答案来保存图像,并在用户分享回来后立即删除它:
private File saveImage(String imageUri, String fileName) {
File file = new File(this.getExternalCacheDir(), fileName);
InputStream sourceStream = null;
File cachedImage = ImageLoader.getInstance().getDiskCache().get(imageUri);
if (cachedImage != null && cachedImage.exists()) {
Log.d(TAG, "Cache exists");
try {
sourceStream = new FileInputStream(cachedImage);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
} else {
Log.d(TAG, "Cache doesn't exist");
}
if (sourceStream != null) {
Log.d(TAG, "SourceStream is not null");
try {
OutputStream targetStram = new FileOutputStream(file);
try {
try {
IoUtils.copyStream(sourceStream, targetStram, null);
} catch (IOException e) {
e.printStackTrace();
}
} finally {
try {
targetStram.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
sourceStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
} else {
Log.d(TAG, "SourceStream is null");
Toast.makeText(this, "Image cannot be shared", Toast.LENGTH_SHORT).show();
}
return file;
}
private void shareImage(String imageUrl, String fileName) {
if (isSDReadableWritable()) {
file = saveImage(imageUrl, fileName);
Uri uri = Uri.fromFile(file);
Intent intent = new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_TEXT, "Hello");
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.setType("image/*");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivityForResult(Intent.createChooser(intent, "Send"), 20);
} else {
Toast.makeText(this, "Storage cannot be accessed", Toast.LENGTH_SHORT).show();
}
}
要删除文件,只需覆盖onActivityResult
,它将在共享后立即删除
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 20 && file != null) {
boolean isDelete = file.delete();
Log.d(TAG, "isDelete is " + isDelete);
}
}