1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.supportv4.content; 18 import android.app.Activity; 19 import android.content.Intent; 20 import android.graphics.Bitmap; 21 import android.graphics.Canvas; 22 import android.net.Uri; 23 import android.os.Bundle; 24 import android.support.v4.content.FileProvider; 25 import android.view.View; 26 27 import com.example.android.supportv4.R; 28 29 import java.io.File; 30 import java.io.FileOutputStream; 31 import java.io.IOException; 32 import java.io.OutputStream; 33 34 /** 35 * Sample that shows how private files can be easily shared. 36 */ 37 public class FileProviderExample extends Activity { 38 private static final String AUTHORITY = "com.example.android.supportv4.my_files"; 39 40 @Override 41 protected void onCreate(Bundle savedInstanceState) { 42 super.onCreate(savedInstanceState); 43 setContentView(R.layout.file_provider_example); 44 } 45 46 public void onShareFileClick(View view) { 47 // Save a thumbnail to file 48 final File thumbsDir = new File(getFilesDir(), "thumbs"); 49 thumbsDir.mkdirs(); 50 final File file = new File(thumbsDir, "private.png"); 51 saveThumbnail(view, file); 52 53 // Now share that private file using FileProvider 54 final Uri uri = FileProvider.getUriForFile(this, AUTHORITY, file); 55 final Intent intent = new Intent(Intent.ACTION_SEND); 56 intent.setType("image/png"); 57 intent.putExtra(Intent.EXTRA_STREAM, uri); 58 startActivity(intent); 59 } 60 61 /** 62 * Save thumbnail of given {@link View} to {@link File}. 63 */ 64 private void saveThumbnail(View view, File file) { 65 final Bitmap bitmap = Bitmap.createBitmap( 66 view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888); 67 final Canvas canvas = new Canvas(bitmap); 68 view.draw(canvas); 69 70 try { 71 final OutputStream os = new FileOutputStream(file); 72 try { 73 bitmap.compress(Bitmap.CompressFormat.PNG, 100, os); 74 } finally { 75 os.close(); 76 } 77 } catch (IOException e) { 78 throw new RuntimeException(e); 79 } 80 } 81 } 82