Fix FileUriExposedException on Android 7.0

Author: ypresto

example/build.gradle

@@ -21,4 +21,5 @@ android {
 
 dependencies {
     compile project(':lib')
+    compile 'com.android.support:support-core-utils:24.2.0'
 }

example/src/main/AndroidManifest.xml

@@ -1,21 +1,35 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="net.ypresto.androidtranscoder.example" >
+    package="net.ypresto.androidtranscoder.example">
+
+    <uses-permission
+        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
+        android:maxSdkVersion="18" />
 
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme" >
+        android:theme="@style/AppTheme">
         <activity
             android:name=".TranscoderActivity"
-            android:label="@string/app_name" >
+            android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <provider
+            android:name="android.support.v4.content.FileProvider"
+            android:authorities="net.ypresto.androidtranscoder.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>

example/src/main/java/net/ypresto/androidtranscoder/example/TranscoderActivity.java

@@ -7,6 +7,7 @@
 import android.os.Bundle;
 import android.os.ParcelFileDescriptor;
 import android.os.SystemClock;
+import android.support.v4.content.FileProvider;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -26,6 +27,7 @@
 
 public class TranscoderActivity extends Activity {
     private static final String TAG = "TranscoderActivity";
+    private static final String FILE_PROVIDER_AUTHORITY = "net.ypresto.androidtranscoder.example.fileprovider";
     private static final int REQUEST_CODE_PICK = 1;
     private static final int PROGRESS_BAR_MAX = 1000;
     private Future<Void> mFuture;
@@ -55,7 +57,10 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                 final File file;
                 if (resultCode == RESULT_OK) {
                     try {
-                        file = File.createTempFile("transcode_test", ".mp4", getExternalFilesDir(null));
+                        File outputDir = new File(getExternalFilesDir(null), "outputs");
+                        //noinspection ResultOfMethodCallIgnored
+                        outputDir.mkdir();
+                        file = File.createTempFile("transcode_test", ".mp4", outputDir);
                     } catch (IOException e) {
                         Log.e(TAG, "Failed to create temporary file.", e);
                         Toast.makeText(this, "Failed to create temporary file.", Toast.LENGTH_LONG).show();
@@ -89,7 +94,10 @@ public void onTranscodeProgress(double progress) {
                         public void onTranscodeCompleted() {
                             Log.d(TAG, "transcoding took " + (SystemClock.uptimeMillis() - startTime) + "ms");
                             onTranscodeFinished(true, "transcoded file placed on " + file, parcelFileDescriptor);
-                            startActivity(new Intent(Intent.ACTION_VIEW).setDataAndType(Uri.fromFile(file), "video/mp4"));
+                            Uri uri = FileProvider.getUriForFile(TranscoderActivity.this, FILE_PROVIDER_AUTHORITY, file);
+                            startActivity(new Intent(Intent.ACTION_VIEW)
+                                    .setDataAndType(uri, "video/mp4")
+                                    .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION));
                         }
 
                         @Override

example/src/main/res/xml/file_paths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <external-path
+        name="output_videos"
+        path="Android/data/net.ypresto.androidtranscoder.example/files/outputs" />
+</paths>