add support for file uri

cameraview/src/main/java/com/otaliastudios/cameraview/CameraUtils.java

@@ -7,7 +7,9 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Matrix;
 import android.hardware.Camera;
+import android.net.Uri;
 import android.os.Handler;
+import android.os.ParcelFileDescriptor;
 
 import com.otaliastudios.cameraview.controls.Facing;
 import com.otaliastudios.cameraview.engine.mappers.Camera1Mapper;
@@ -98,6 +100,23 @@ public class CameraUtils {
         }
     }
 
+    @SuppressWarnings("WeakerAccess")
+    @Nullable
+    @WorkerThread
+    @SuppressLint("NewApi")
+    public static Uri writeToFile(Context context, @NonNull final byte[] data, @NonNull Uri file) {
+        try {
+            ParcelFileDescriptor fd = context.getContentResolver().openFileDescriptor(file, "w");
+            OutputStream stream = new ParcelFileDescriptor.AutoCloseOutputStream(fd);
+            stream.write(data);
+            stream.flush();
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            return file;
+        }
+    }
+
 
     /**
      * Writes the given data to the given file in a background thread, returning on the
@@ -128,6 +147,26 @@ public class CameraUtils {
         });
     }
 
+    @SuppressWarnings("WeakerAccess")
+    public static void writeToFile(final Context context,
+                                   @NonNull final byte[] data,
+                                   @NonNull final Uri file,
+                                   @NonNull final FileUriCallback callback) {
+        final Handler ui = new Handler();
+        WorkerHandler.execute(new Runnable() {
+            @Override
+            public void run() {
+                final Uri result = writeToFile(context, data, file);
+                ui.post(new Runnable() {
+                    @Override
+                    public void run() {
+                        callback.onFileReady(result);
+                    }
+                });
+            }
+        });
+    }
+
     /**
      * Decodes an input byte array and outputs a Bitmap that is ready to be displayed.
      * The difference with {@link android.graphics.BitmapFactory#decodeByteArray(byte[], int, int)}

cameraview/src/main/java/com/otaliastudios/cameraview/FileUriCallback.java

@@ -0,0 +1,19 @@
+package com.otaliastudios.cameraview;
+
+import android.net.Uri;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+
+public interface FileUriCallback {
+    /**
+     * Notifies that the data was succesfully written to file.
+     * This is run on the UI thread.
+     * Returns a null object if an exception was encountered, for example
+     * if you don't have permissions to write to file.
+     *
+     * @param fileUri the written file, or null
+     */
+    @UiThread
+    void onFileReady(@Nullable Uri fileUri);
+}

cameraview/src/main/java/com/otaliastudios/cameraview/PictureResult.java

@@ -1,7 +1,9 @@
 package com.otaliastudios.cameraview;
 
+import android.content.Context;
 import android.graphics.BitmapFactory;
 import android.location.Location;
+import android.net.Uri;
 import android.os.Build;
 
 import com.otaliastudios.cameraview.controls.Facing;
@@ -172,4 +174,8 @@ public class PictureResult {
     public void toFile(@NonNull File file, @NonNull FileCallback callback) {
         CameraUtils.writeToFile(getData(), file, callback);
     }
+
+    public void toFile(Context context, @NonNull Uri fileUri, @NonNull FileUriCallback callback) {
+        CameraUtils.writeToFile(context, getData(), fileUri, callback);
+    }
 }