Video files now must not be null

cameraview/src/androidTest/java/com/otaliastudios/cameraview/IntegrationTest.java

@@ -18,6 +18,7 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.io.File;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
@@ -149,7 +150,8 @@ public class IntegrationTest extends BaseTest {
 
     private void waitForVideoStart() {
         controller.mStartVideoTask.listen();
-        camera.takeVideo(null);
+        File file = new File(context().getFilesDir(), "video.mp4");
+        camera.takeVideo(file);
         controller.mStartVideoTask.await(400);
     }
 

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

@@ -1284,10 +1284,7 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
      *
      * @param file a file where the video will be saved
      */
-    public void takeVideo(@Nullable File file) {
+    public void takeVideo(@NonNull File file) {
-        if (file == null) {
-            file = new File(getContext().getFilesDir(), "video.mp4");
-        }
         mCameraController.takeVideo(file);
         mUiHandler.post(new Runnable() {
             @Override
@@ -1307,11 +1304,8 @@ public class CameraView extends FrameLayout implements LifecycleObserver {
      *
      * @param file a file where the video will be saved
      */
-    public void takeVideoSnapshot(@Nullable File file) {
+    public void takeVideoSnapshot(@NonNull File file) {
         if (getWidth() == 0 || getHeight() == 0) return;
-        if (file == null) {
-            file = new File(getContext().getFilesDir(), "video.mp4");
-        }
         mCameraController.takeVideoSnapshot(file, AspectRatio.of(getWidth(), getHeight()));
         mUiHandler.post(new Runnable() {
             @Override

docs/_posts/2018-12-20-v1-migration-guide.md

@@ -117,6 +117,9 @@ Some new APIs were introduced, which are respected by both standard videos and s
 - `setAudioBitRate()` and `cameraAudioBitRate`: sets the audio bit rate in bit/s
 - `setVideoBitRate()` and `cameraVideoBitRate`: sets the video bit rate in bit/s
 
+**Important: takeVideo(), like takeVideoSnapshot(), will not accept a null file as input. Use
+new File(context.getFilesDir(), "video.mp4") to use the old default.**
+
 ### Camera Preview
 
 The type of preview is now configurable with `cameraPreview` XML attribute and `Preview` control class.