CODEWITHSUNDEEP
androidandroid-videoview
Karthik
Karthik

Reputation: 3529

switching videoviews

In my activity, i have 2 VideoViews. i have to play different video files continuously one after the other.
To reduce the switching time, i planned flip the video views. i.e. one video view will be VISIBLE, while other is GONE. While the visible video view is playing, i can initalize (setVideoPath) the other video view.

But based on Logs, i found that for the videoview with visibility GONE, after calling setVideoPath, theOnPreparedListeneris called only when the view becomes VISIBLE. I.e. after the first videoview completes, i switch the visibility, then i get the OnPreparedListenerfor the 2nd videoview.

To confirm my findings, i made both videoviews VISIBLEand calledsetVideoPath. In this case, both the OnPreparedListenerare called immediately.

Question:
Is the VideoView preparation (setVideoPath) dependent on its Visibility?
Is there any way to prepare the videoview in the background (without showing it to user)?

Thanks!

Upvotes: 1

Views: 1305

Answers (3)

Konstantin Pribluda
Konstantin Pribluda

Reputation: 12367

View has to be visible and laid out before it can be bound to camera application. ( Surface view calbacks shall be processed before you do anything ).

Upvotes: 0

goto10
goto10

Reputation: 4370

Digging through the source code for VideoView and SurfaceView it looks like most of the work of initializing the Media Player doesn't happen until after the view is visible. I don't see a way around that.

In particular, here's the part of SurfaceView.java that runs when the view becomes visible:

if (visible) {
    // other stuff
    if (visibleChanged) {
        mIsCreating = true;
        for (SurfaceHolder.Callback c : callbacks) {
            c.surfaceCreated(mSurfaceHolder);
        }
    }
    // other stuff
}

That calls this in VideoView.java:

SurfaceHolder.Callback mSHCallback = new SurfaceHolder.Callback()
{
    // other stuff
    public void surfaceCreated(SurfaceHolder holder)
    {
        mSurfaceHolder = holder;
        openVideo();
    }
    // other stuff
}

And openVideo() is where all the magic happens.

Upvotes: 0

Reno
Reno

Reputation: 33792

Is the VideoView preparation (setVideoPath) dependent on its Visibility?

Apparently yes. openVideo() requires that there is some visibility

public void setVideoURI(Uri uri) {
        mUri = uri;
        mStartWhenPrepared = false;
        mSeekWhenPrepared = 0;
        openVideo();
        requestLayout();
        invalidate();
    }

Is there any way to prepare the videoview in the background (without showing it to user)?

Extend this VideoView and handle prep yourself. Or just use your own VideoView

Upvotes: 1

Related Questions