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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.supportv4.content;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.content.FileProvider;
import android.view.View;
import com.example.android.supportv4.R;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* Sample that shows how private files can be easily shared.
*/
public class FileProviderExample extends Activity {
private static final String AUTHORITY = "com.example.android.supportv4.my_files";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.file_provider_example);
}
public void onShareFileClick(View view) {
// Save a thumbnail to file
final File thumbsDir = new File(getFilesDir(), "thumbs");
thumbsDir.mkdirs();
final File file = new File(thumbsDir, "private.png");
saveThumbnail(view, file);
// Now share that private file using FileProvider
final Uri uri = FileProvider.getUriForFile(this, AUTHORITY, file);
final Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("image/png");
intent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(intent);
}
/**
* Save thumbnail of given {@link View} to {@link File}.
*/
private void saveThumbnail(View view, File file) {
final Bitmap bitmap = Bitmap.createBitmap(
view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
view.draw(canvas);
try {
final OutputStream os = new FileOutputStream(file);
try {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, os);
} finally {
os.close();
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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