Sharing a bitmap requires saving it to file before sharing.
Create a file provider
In your AndroidManifest.xml;
replace the com.pixplicity.example with your own package name, and make sure it
is unique. A user cannot install multiple apps sharing the same provider.
<manifest>
...
<application>
...
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.pixplicity.example.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
...
</application>
</manifest>
File provider paths
Create the file_paths.xml in res/xml/:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<cache-path name="shared_images" path="images/"/>
</paths>
</resources>
Save the bitmap
Replace the com.pixplicity.example with your own package name.
We’re assuming the shared file is a PNG; change this however you like
but remember to set the correct mime type in the snippet at the bottom as well.
private Uri saveImage(Bitmap image) {
File imagesFolder = new File(getCacheDir(), "images");
Uri uri = null;
try {
imagesFolder.mkdirs();
File file = new File(imagesFolder, "shared_image.png");
FileOutputStream stream = new FileOutputStream(file);
image.compress(Bitmap.CompressFormat.PNG, 90, stream);
stream.flush();
stream.close();
uri = FileProvider.getUriForFile(this, "com.pixplicity.example.fileprovider", file);
} catch (IOException e) {
Log.d(TAG, "IOException while trying to write file for sharing: " + e.getMessage());
}
return uri;
}
Share it
private void shareImageUri(Uri uri){
Intent intent = new Intent(android.content.Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_STREAM, uri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setType("image/png");
startActivity(intent);
}