I don't have a direct answer for you.
But this is what i usually do when problems baffle me. I browse the
git-source of Android.
Try to find the source of SurfaceHolder and find the lockCanvas( ) and
see why it may throw an exception.
On Apr 3, 1:32 pm, mcmc <manni...@gmail.com> wrote:
> Everytime it hits the "c = mHolder.lockCanvas();" line, it pops up
> with that same error mentioned below.
>
> Also, I realize that c returns a null after called lockCanvas(), but
> mHolder is still active. Why might this be?
>
> I'm getting the following error as seen from the logcat window:
>
> E/SurfaceComposerClient( 608): eLocked set when entering lock_layer
> (), layer=1 (lcblk=0x410480a0), state=00000022
> E/SurfaceHolder( 608): Exception locking surface
> E/SurfaceHolder( 608): java.lang.IllegalArgumentException
> E/SurfaceHolder( 608): at
> android.view.Surface.lockCanvasNative(Native Method)
> E/SurfaceHolder( 608): at android.view.Surface.lockCanvas
> (Surface.java:190)
> E/SurfaceHolder( 608): at android.view.SurfaceView
> $2.internalLockCanvas(SurfaceView.java:549)
> E/SurfaceHolder( 608): at android.view.SurfaceView
> $2.lockCanvas(SurfaceView.java:528)
>
> This is the basis of my code, which is primarily based on the
> lunarview:
>
> @Override
> public void run() {
> while (mRun) {
> Canvas c = null;
> try {
> mHolder = getHolder(); //make sure holder is updated
> c = mHolder.lockCanvas();
> synchronized (mHolder) {
> if (mMode == STATE_RUNNING && c != null){
> doDraw(c);
> }
> }
> } finally {
> // do this in a finally so that if an exception is thrown
> // during the above, we don't leave the Surface in an
> // inconsistent state
> if (c != null) {
> mHolder.unlockCanvasAndPost(c);
> }
> }
> }
>
> }
>
> Can someone get back to me ASAP, this is urgent.
>
> Thanks a lot,
> mcmc
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