当应用程序从后台进入前台时，onBackPress() 不起作用

Question

I have a videoView in my activity. onBackPress() is not working when app comes to foreground from background and also when i lock my phone and unlock it because of videoView.seekTo(1). How do we solve it

Below is my code. Please help

public class VideoPreviewActivity extends implements View.OnClickListener  {

    TextView tv_response;
    ImageView iv_video_preview;
    VideoView videoView;
    @SuppressLint({"ClickableViewAccessibility", "InlinedApi"})
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_video_preview);
        processIntent(getIntent());
    }


    public void processIntent(Intent intent) {
        int is_doc_context = intent.getIntExtra(IS_DOC_CONTEXT, 2);
        if (is_doc_context == 1) {

            final MediaController mc = new MediaController(this);
            mc.setVisibility(View.GONE);
            mc.setAnchorView(videoView);
            mc.setMediaPlayer(videoView);
            final Uri video = Uri.parse(videoFileString);
            videoView.setMediaController(mc);
            videoView.setVideoURI(video);
            videoView.seekTo( 1 );

            videoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
                @Override
                public void onCompletion(MediaPlayer mp) {
                }
            });
        } 
    }

    @Override
    protected void onResume() {

        videoView.seekTo( 1 );
        super.onResume();
    }

    @Override
    protected void onPause() {

        if (videoView.isPlaying()){
            videoView.stopPlayback();
        }
        super.onPause();
    }

    @Override
    public void onBackPressed() {
        LibUtils.onBackButtonClick(VideoPreviewActivity.this);
    }
}

Please let me know if you need any information.

Answer 1

call super.onBackPressed() inside in your override onBackPressed() method.

Answer 2

You didn't call findViewById for videoView .

1) Make sure that in your xml of videoView you add an id :

<VideoView 
android:id="@+id/video_view"
android:layout_height="......"
android:layout_width="......." />

2) Do this in onCreate() :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_video_preview);
    processIntent(getIntent());

    //here find the video view
    videoView = findViewById(R.id.video_view);
}

3) One more thing in your onBackPressed() :

   @Override
    public void onBackPressed() {
        LibUtils.onBackButtonClick(VideoPreviewActivity.this);
        //add this
        super.onBackPressed();
    }