Develop Reference

SurfaceView and xml

I have program where i use my SurfaceView class. But i want to add ad in my game.To do it i must add xml and use it (i never use xml file and know few about it). Help me pls whith it.
Main Activity on create:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ThisActivity=this;
new Game(this);
setContentView(Game.game);
}
Game:
public class S_Game extends SurfaceView implements CallBack{
public S_Game(Context context){
super(context);
getHolder().addCallback(this);
game=this;
sinh0=false;
sinh1=false;
sinh2=true;
String abas=" "+"";
spacekey=abas.hashCode();
paint=new Paint();
paint.setColor(0xffff0000);
paint.setTextSize(20);
pickx=new AtomicInteger[3];
picky=new AtomicInteger[3];
ifpick0=new AtomicBoolean[3];
for(int i=0;i<3;i++){
pickx[i]=new AtomicInteger();
picky[i]=new AtomicInteger();
ifpick0[i]=new AtomicBoolean();
}
pickt=new AtomicInteger();
NewTimer();
}
public void NewTimer(){
upd=new S_Updater(this);
timer=new Timer();
timer.schedule(upd,250,40);
}
public void Init(){
if(getHeight()>getWidth()){
S_Graff.thisindgraff=0;
}else{
S_Graff.thisindgraff=1;
}
DisplayMetrics metrics = new DisplayMetrics();
MainActivity.ThisActivity.getWindowManager().getDefaultDisplay().getMetrics(metrics);
xdpi=SK(metrics.xdpi);
ydpi=SK(metrics.ydpi);
xdpi=SK(metrics.densityDpi);
float sm=xdpi/3;
float sms=(55/sm);
dpi=sms;
wind=new S_Window(0,0,760,1430);
Board.psize=KonK(18);
Board.DY/=sms;
if(dpi<=0.55){
dpi=0.55f;
}
String s="|";
Board.LINE=s.hashCode();
}
public void Update(Canvas cnv){
if(getHeight()>getWidth()){
maxx=smaxx;
maxy=smaxy;
kx=maxx/getWidth();
ky=maxy/getHeight();
kk=kx;
S_Graff.thisindgraff=0;
debug0=""+maxy+"/"+getHeight();
debug1=""+maxx+"/"+getWidth();
}else{
maxx=smaxy;
maxy=smaxx;
kx=maxx/getWidth();
ky=maxy/getHeight();
kk=ky;
S_Graff.thisindgraff=1;
}
if(binit){LInit();binit=false;}
for(int i=0;i<3;i++){
if(!ifpick0[i].get()){
float px=pickx[i].get();
px/=1000;
float py=picky[i].get();
py/=1000;
ifpick0[i].set(true);
S_Window.Pick(px,py,i);
}
}
S_Graff.OnRotAll();
cnv.drawColor(0xffffffff);
//I draw all S_Graffs in Update
S_Graff.Update(cnv);
Board.UpdateText(cnv);
}
#Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {}
#Override
public void surfaceCreated(SurfaceHolder holder) {
//new Timer().schedule(upd,250,40);
/*Canvas c = getHolder().lockCanvas();
Update(c);
getHolder().unlockCanvasAndPost(c);*/
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
S_Updater:
public class S_Updater extends TimerTask{
public S_Game game;
public SurfaceHolder surfaceHolder;
static boolean isrun=true,ispause;
public S_Updater(S_Game g) {
game=g;
surfaceHolder=g.getHolder();
}
#Override
public void run() {
Canvas canvas=null;
try {
synchronized (surfaceHolder) {
if(surfaceHolder.getSurface().isValid()){
canvas=surfaceHolder.lockCanvas(null);
if(canvas!=null){
game.Update(canvas);
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
finally {}
}
}

surface view not drawing anthing ... frame skipped message

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

Canvas layout with SurfaceView

I was trying to make the image move. The image does not move and sometimes it flickers.
I wanted to make it Runnable. It uses a Surface Holder and s is the bitmap. The canvas sometimes remain still at i=0 or it flickers. How to make it runnable
package com.smiley;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.Log;
import android.view.KeyEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class SmileyView extends SurfaceView implements SurfaceHolder.Callback {
public SmileyView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
holder = getHolder();
s= BitmapFactory.decodeResource(context.getResources(),R.drawable.smiley);
holder.addCallback(this);
}
#Override
public boolean onKeyUp(int keyCode, KeyEvent msg) {
super.onKeyUp(keyCode, msg);
rv.update();
return true;
}
private int i=0;
private Bitmap s;private SurfaceHolder holder;private RenderView rv ;
boolean grun=true;long t=0;
public void resume()
{
rv=new RenderView();
}
#Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder arg0) {
// TODO Auto-generated method stub
grun=true;
if(rv!=null)
rv.start();
}
#Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub
try {
grun =false;
rv.join();
rv=null;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class RenderView extends Thread {
RenderView(){
super();
}
#Override
public void run()
{
SurfaceHolder h=holder;
while(grun)
{
Canvas ca=null;
try{ca = h.lockCanvas(null);
synchronized (h) {
update(); dodraw(ca);
}
}
finally
{
if(ca!=null)
h.unlockCanvasAndPost(ca);
}
}
}
public void dodraw(Canvas canvas)
{ canvas.drawBitmap(s, i, i , null);
canvas.restore();
}
public void update()
{
if(i==0)
i=100;
}
}
}

I made a tutorial for what it seems like you want to do here. You can check it out here. If I had to guess then it might be an issue with not clearing out the canvas. try changing it to (assuming your background is Bitmap backBG)
public void dodraw(Canvas canvas)
{
canvas.drawBitmap(backBG, 0, 0, null);
canvas.drawBitmap(s, i, i , null);
canvas.restore();
}

Problem in displaying Bitmaps on canvas

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

Application error when drawing to SurfaceView

I'm am doing a simple coding attempt trying to draw on a SurfaceView created on my main.xml layout. I can change background color and display an icon fine, but when I try to draw I get an error. I am a newbie so obvious I am missing something, please lend a helping hint, thanks!
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/root" android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<SurfaceView android:id="#+id/Paper"
android:layout_height="fill_parent"
android:layout_width="fill_parent">
</SurfaceView>
</LinearLayout>
and code here;
package com.example.SurfaceViewTest;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class SurfaceViewTest extends Activity implements SurfaceHolder.Callback {
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
private Paint paint;
Bitmap mDrawing;
boolean mRun;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) this.findViewById(R.id.Paper);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// TODO Auto-generated method stub
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
mSurfaceView.setBackgroundColor(Color.rgb(0, 255, 0));
mRun=true;
thread.start();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
Thread thread = new Thread(){
public void doDraw(Canvas c){
mDrawing = Bitmap.createBitmap(200, 300, Bitmap.Config.RGB_565);
c.setBitmap(mDrawing);
paint = new Paint();
paint.setColor(Color.rgb(255, 255,255));
c.drawLine(1,1,200,300, paint);
}
public void run() {
while (mRun) {
Canvas c = null;
try {
c = mSurfaceHolder.lockCanvas(null);
synchronized (mSurfaceHolder) {
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) {
mSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
};
}
UPDATE:
Ok I got it to works thanks!
package com.example.SurfaceViewTest;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class SurfaceViewTest extends Activity implements SurfaceHolder.Callback {
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
Bitmap mDrawing;
Canvas tempCanvas = new Canvas();
Paint paint;
boolean mRun;
int intCanvasWidth, intCanvasHeight;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) this.findViewById(R.id.Paper);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
intCanvasWidth = width;
intCanvasHeight = height;
mDrawing = Bitmap.createBitmap(intCanvasWidth, intCanvasHeight,
Bitmap.Config.RGB_565);
paint = new Paint();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (thread.getState() == Thread.State.TERMINATED) {
thread = new Thread();
}
mRun = true;
thread.start();
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
boolean retry = true;
mRun = false;
while (retry) {
try {
thread.join();
retry = false;
} catch (InterruptedException e) {
// we will try it again and again...
}
}
}
Thread thread = new Thread() {
public void doDraw(Canvas c) {
tempCanvas.setBitmap(mDrawing);
paint.setColor(Color.rgb(255, 255,255));
tempCanvas.drawLine(1,1,200,300, paint);
c.drawBitmap(mDrawing, 0, 0, null);
}
#Override
public void run() {
Canvas c;
while (mRun) {
c = null;
try {
c = mSurfaceHolder.lockCanvas(null);
synchronized (mSurfaceHolder) {
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) {
mSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
};
}

Here's how my SurfaceView works. I think your problem is doing your Bitmap in surfaceCreated().
#Override
public void surfaceCreated(SurfaceHolder holder) {
thread.start();
}
Thread thread = new Thread(){
...
public void doDraw(Canvas c){
//draw onto the canvas here
}
public void run() {
while (mRun) {
Canvas c = null;
try {
c = mSurfaceHolder.lockCanvas(null);
synchronized (mSurfaceHolder) {
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) {
mSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
}
};