I'm working on a video into a SurfaceView.
My goal is to get recurrent bitmaps of the running video.
Here is my Custom implementation:
private static final String TAG = "XXX";
private Activity activity;
private SurfaceHolder mSurface;
private MediaPlayer mMediaPlayer;
private SurfaceHolder mActiveSurface;
public ImageView imageView;
boolean locked, locked1;
private boolean isCreated;
public AlphaSurfaceView(Context context,Activity activity) {
super(context);
getHolder().addCallback(this);
setWillNotDraw(false);
this.activity = activity;
}
public AlphaSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public AlphaSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public void draw(Canvas canvas) {
super.draw(canvas);
}
#Override
public void onDraw(Canvas canvas) {
//super.onDraw(canvas);
if(isCreated){
if(getHolder() != null && getHolder().getSurface().isValid()){
Canvas c = null;
try {
if(!locked){
try {
c = getHolder().lockCanvas();
locked = true;
}catch (IllegalArgumentException e){
e.printStackTrace();
locked = false;
}
BitmapDrawable bdrawable = new BitmapDrawable();
bdrawable.draw(c);
}
}catch (Exception e){
e.printStackTrace();
locked = false;
}finally {
if(c != null && locked){
getHolder().unlockCanvasAndPost(c);
locked = false;
}
}
}
}else{
super.onDraw(canvas);
}
invalidate();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
mSurface = holder;
mMediaPlayer = MediaPlayer.create(getContext(), Uri.parse("XX"), mSurface);
mActiveSurface = mSurface;
try {
mMediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
mMediaPlayer.start();
mMediaPlayer.setLooping(true);
}
});
} catch (Exception e) {
e.printStackTrace();
}
this.isCreated = true;
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.d(TAG, "surfacechanged");
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
mMediaPlayer.stop();
}
#Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mMediaPlayer.stop();
}
The problem is an IllegalArgumentException occured by the lockCanvas() method.
I tried many possibilities as:
Adding some boolean (locked & creation of surfaceview)
Test if surface is valid
even add exported="true" in targeted activity in Manifest's xml
By the way the first idea was to use getDrawingCache() but even i added setCacheEnabled(true), the return was null.
So how to resolve this Exception or using another way to get each frame?
Thanks!
You can't draw on a Surface and send a video to it. A Surface is the producer end of a producer-consumer pair, and you can only have one producer at a time.
The easiest way to have a Canvas overlap a SurfaceView Surface is to draw on the View part of the SurfaceView. Send the video to the Surface, and use onDraw() (like a custom view) to draw on the View.
Bear in mind that the Surface is a separate layer that sits behind the View UI layer, so you will need to draw on the View with transparency to see the Surface contents.
Another approach is to use multiple overlapping SurfaceViews, but this is less efficient and more limited. An example with three overlapping Surfaces can be found in Grafika's multi-surface test Activity.
surfaceHolder.addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
Log.e("video","surfaceChanged");
}
#Override
public void surfaceCreated(SurfaceHolder arg0) {
Log.e("video","surfaceCreated");
mediaPlayer.setDisplay(surfaceHolder);
}
#Override
public void surfaceDestroyed(SurfaceHolder arg0) {
Log.e("video","surfaceDestroyed");
if (mediaPlayer != null) mediaPlayer.release();
}
});
That should help.
Let the MediaPlayer do the drawing thing.
Related
Sorry for my english. I have activity1, and activity2. In activity1 i have button, when i click this button this button freezes for a few seconds and after this open activity2. To remove a freeze when click button in activity1 I added code that launches the camera in new runOnUiThread but now not called surfaceCreated.
mPreview - my custom surfaceView
mCamera - object camera
My code:
new Thread(new Runnable() {
#Override
public void run() {
CameraActivity.this.runOnUiThread(new Runnable() {
#Override
public void run() {
mPreview.addCamera(mCamera);
mPreview.addParent(CameraActivity.this);
mCamera.getParameters().setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
mPreview.refreshDrawableState();
mCamera.startPreview();
}
});
}
}).start();
My costom SurfaceView ( i add only important code)
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
public CameraPreview (Context context){
super(context);
}
public CameraPreview(Context context, AttributeSet attrs){
super(context, attrs);
}
public CameraPreview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void addCamera(Camera camera){
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
try {
if(mCamera!=null){
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
}
} catch (Exception e){
Toast.makeText(this.getContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
//code
mCamera.startPreview();
}
}
That's the expected behaviour, the Surface is maintained by the SurfaceView, as a workaround you could check if the surface is valid and has non-0 dimentions and call your surfaceCreated/surfaceChangedfunctions manually
the code you need:
Surface surface = mHolder.getSurface();
if(surface != null && surface.isValid()){
Rect frame = mHolder.getSurfaceFrame();
if(frame.width() > 0 && frame.height() > 0){
surfaceCreated(mHolder);
surfaceChaged(mHolder, PixelFormat.OPAQUE, frame.width(), frame.height()); //pixel format OPAQUE is the default one
}
}
In my android app i have activity containing a surfaceview. I want to start the surfaceview thread when the surfaceview/activity is visible to user. I have tried starting the thread in OnSurfaceCreated. That works but on some mobiles(samsung) The activity takes many seconds to become visible.The screen turns black when i resume activity. So i googled and found that when a view becomes visible onFocusChanged is called. I tried implementing OnFocusChanged in surfaceview but it is never called. below is my surfaceview class.
public class ImageSurface extends SurfaceView implements SurfaceHolder.Callback {
private DrawThread drawThread;
private SurfaceHolder sHolder;
private ImageHolder imageHolder;
Bitmap mybit;
Bitmap orgiBitmap;// ;)
int message;
Context context;
private String valMagField;
public ImageSurface(Context context, AttributeSet attrs) {
super(context, attrs);
this.context=context;
SurfaceHolder holder = getHolder();
holder.addCallback(this);
setFocusable(true);
clearFocus();
drawThread = new DrawThread(context);
}
public void setImageHolder(ImageHolder imageHolder){
this.imageHolder = imageHolder;
}
public void setBitmap(String filePath){
}
public void resume(){
drawThread.resumeThread();
}
#Override
public void onFocusChanged(boolean focus,int direction,Rect rect){
super.onFocusChanged(focus, direction, rect);
Log.d("in focus changed","onfocuschanged"+System.currentTimeMillis());
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
drawThread.setSurfaceSize(width, height);
resume();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
long startTime, stopTime;
startTime = System.currentTimeMillis();
sHolder = holder;
drawThread.setRunning(true);
if(drawThread.getState()==Thread.State.NEW){
drawThread.start();
}
if(drawThread.getState()==Thread.State.TERMINATED){
drawThread = new DrawThread(context);
drawThread.setRunning(true);
drawThread.start();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
drawThread.pauseThread();
}
class DrawThread extends Thread{
int value=0;
private Boolean drun;
int valSize =30;
Context context;
private int sHeight , sWidth;
int lastmessage;
boolean threadPaused= false;
public DrawThread(Context context){
drun = false;
this.context = context;
}
public void pauseThread(){
synchronized(this){
threadPaused = true;
this.notify();
}
}
public void resumeThread(){
synchronized(this){
threadPaused = false;
this.notify();
}
}
public void setRunning(Boolean run){
drun = run;
}
public boolean isRunning(){
return drun;
}
public void setSurfaceSize(int width , int height){
sWidth = width;
sHeight = height;
}
#Override
public void run(){
while(drun){
Canvas c = null;
//Log.d("yes","thread is running");
try{
synchronized(this){
if(threadPaused)
try {
this.wait();
} catch (InterruptedException e) {
Log.d("in wait of surface view thread","error"+e.toString());
}
}
c = sHolder.lockCanvas(null);
synchronized(sHolder){
updateCanvas(c);
}
}finally {
if(c!=null){
sHolder.unlockCanvasAndPost(c);
}
}
}
}
private void updateCanvas(Canvas canvas){
try{
if(imageHolder.dispBit!= null){
int x=(sWidth-imageHolder.dispBit.getWidth())/2,y=(sHeight-imageHolder.dispBit.getHeight())/2;
imageHolder.applyEffects();
if(canvas!=null)
canvas.drawBitmap(imageHolder.dispBit, x,y,null);
}
else if(imageHolder!=null)
imageHolder.setDisplaySize(sWidth, sHeight);
}catch(Exception e){
e.printStackTrace();
}
}
}
}
i am trying to run a simple button animation when the game is over
i have the following classes:
GameView
GameThread
public class GameView extends SurfaceView implements SurfaceHolder.Callback {
boolean gameover;GameThread gamethread;
public GameView(Context context, AttributeSet attrs) {
super(context, attrs);
gameover=true;
getHolder().addCallback(this); // adding the callback (this) to the surface holder to intercept events
setFocusable(true);// make the GamePanel focusable so it can handle events
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
Log.d("TAG", "surface changed");
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
gamethread=new GameThread(getHolder(),this);
gamethread.setrunning(true);
gamethread.start();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry=true;
Log.d("TAG", "Surface destroyed entered");
while(retry){
try {
gamethread.setrunning(false);
gamethread.join();
gamethread=null;
Log.d("tag","thread is destroyed" );
if(gamethread==null){
Log.d("tag","thread is destroyed and null" );
}
retry=false;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}//end while
}//end method
public void update(){
if(gameover){
Button gameover_button = (Button) findViewById(R.id.gameover);
Animation animation = AnimationUtils.loadAnimation(getContext(), R.anim.gameoveranimation);
gameover_button.startAnimation(animation);
}
}//end update`
public class GameThread extends Thread {
// desired fps
private boolean running;
private SurfaceHolder surfaceholder;
private GameView gameview;
public GameThread(SurfaceHolder surfaceHolder, GameView gameview){
this.gameview=gameview;
this.surfaceholder=surfaceHolder; //we need the surfaceholder since we need to lock surface before drawing
}
public void setrunning(boolean running){
this.running=running;
}
#Override
public void run(){
super.run();
Canvas canvas;
while(running){
canvas=null;
canvas = this.surfaceholder.lockCanvas();
synchronized (surfaceholder) {
if(canvas!=null){
canvas.drawColor(Color.BLACK);
this.gameview.Draw1(canvas);
this.gameview.update();
}//end if
}
}
}finally{//in case of an exception
if(canvas!=null){
surfaceholder.unlockCanvasAndPost(canvas);
}
}//end finally
}//end loop
}//end run
}
<br>
everything works fine except the animation in the update method in the gameview class
the animation runs fine in the oncreate method
i know that my problem is related to thread but i don't know much about them
thx in advance
`
If your issue is that you need to call update on the UI thread, then you can use this:
Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
#Override
public void run() {
this.gameview.update();
}
});
Also, it looks like you are looking for your game-over button as a child of your surface view. If that is not correct, you can find the view relative to the parent activity.
Activity activity = (Activity) getContext();
Button gameover_button = (Button) activity.findViewById(R.id.gameover);
public class CannonView extends SurfaceView implements SurfaceHolder.Callback {
CannonThread cannonThread;
private Paint blockerPaint;
public CannonView(Context context, AttributeSet attrs) {
super(context, attrs);
blockerPaint = new Paint();
blockerPaint.setStrokeWidth(10.0f);
getHolder().addCallback(this);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
cannonThread = new CannonThread(holder);
cannonThread.running(true);
cannonThread.start();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry = true;
cannonThread.running(false);
while (retry) {
try {
cannonThread.join();
retry = false;
} catch (InterruptedException e) {
}
}
}
private class CannonThread extends Thread {
boolean setRunning;
SurfaceHolder surfaceHolder;
public CannonThread(SurfaceHolder holder) {
setRunning = true;
surfaceHolder = holder;
}
public void running(boolean isRunning) {
setRunning = isRunning;
}
#Override
public void run() {
Canvas canvas = null;
while (setRunning) {
try {
canvas = surfaceHolder.lockCanvas();
synchronized (surfaceHolder) {
canvas.drawLine(0, 0, 100, 100, blockerPaint);
}
} finally {
if (canvas != null)
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
}
Although above code is very simple
but it is not drawing anything on my activity ..
Logcat says i am doing too much work on main thread ..62 frame skipped ..
Please help
Well this isn't my style of coding, so I decided that you need to simplify things a bit. You used the android api guides but they suck.
Watch the following videos and you should be fine.
http://www.youtube.com/watch?v=wUmId0rwsBQ&list=SP2F07DBCDCC01493A&index=67
http://www.youtube.com/watch?v=0wy907WZFiA&list=SP2F07DBCDCC01493A
http://www.youtube.com/watch?v=ZMcYbf9Hhe4&list=SP2F07DBCDCC01493A
http://www.youtube.com/watch?v=yowNavIDzzE&list=SP2F07DBCDCC01493A
I am have some bitmaps which i want to display serially one after another but my code displays only last bitmap.Can anybody tell me why is it happening?
here is the code
class Panel extends SurfaceView implements SurfaceHolder.Callback {
private boolean _run = false;
public Panel(Context context) {
super(context);
getHolder().addCallback(this);
_run = true;
}
#Override
public void onDraw(Canvas canvas) {
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.i("Read","surfaceChanged is called");
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i("Read","surfaceCreated is called");
while (_run ) {
display();
}
}
public void display() {
Canvas c;
c = null;
try {
c = getHolder().lockCanvas(null);
synchronized (getHolder()) {
onPreviewFrame();
invalidate();
c.drawColor(Color.BLACK);
c.drawBitmap(bmp, 10, 10, null);
//panel.surfaceDestroyed(panel.getHolder());
}
} finally {
if (c != null) {
getHolder().unlockCanvasAndPost(c);
}
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("Read","surfaceDestroyed is called");
_run = false;
}
}
I am not sure what your requirement is but if your are trying to create a continous horizontal image scroll. Take a look at this
https://github.com/blessenm/SlideshowDemo