Develop Reference

Controlling the frame animation speed with seek bar in android

I have the following code that changes the opacity of the frame animation with the help of a seekbar, now i'm trying to control the duration of frame animation with the help of this seek bar, can anybody help me in telling that if it is possible?
The code:
ImageView myAnimation = (ImageView)findViewById(R.id.myanimation);
//Create a new AnimationDrawable
final AnimationDrawable myAnimationDrawable
= createAnimationDrawable();
//apply the new AnimationDrawable
myAnimation.setImageDrawable(myAnimationDrawable);
SeekBar setAnimationAlpha = (SeekBar)findViewById(R.id.setalpha);
Button startAnimation = (Button)findViewById(R.id.startanimation);
Button stopAnimation = (Button)findViewById(R.id.stopanimation);
startAnimation.setOnClickListener(new Button.OnClickListener(){
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(!myAnimationDrawable.isRunning()){
myAnimationDrawable.start();
}
}});
stopAnimation.setOnClickListener(new Button.OnClickListener(){
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(myAnimationDrawable.isRunning()){
myAnimationDrawable.stop();
}
}});
setAnimationAlpha.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener(){
#Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
myAnimationDrawable.setAlpha(progress);
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
#Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}});
}
private AnimationDrawable createAnimationDrawable(){
AnimationDrawable newAnim = new AnimationDrawable();
newAnim.addFrame(getResources().getDrawable(R.drawable.android_1), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_2), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_3), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_4), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_5), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_6), 90);
newAnim.addFrame(getResources().getDrawable(R.drawable.android_7), 90);
newAnim.setOneShot(false);
return newAnim;
}
}

screen brightness seekbar not working

In my app I added a SeekBar which controls the screen brightness. It works some what fine .
I get the device's screen brightness in Oncreate() and set the progress of the SeekBar.
But when I change the seekbar progress , when I set it to the minimum(ie. to the zero position) the device gets stuck and I had to restart my device to get it working again.
What is wring with my code. Please help me
in oncreate() I have the following code,
try {
BackLightValue = android.provider.Settings.System.getInt(getContentResolver(),Settings.System.SCREEN_BRIGHTNESS);
brightnessscrollbar.setProgress(BackLightValue);
System.out.println("Baclightvalue is "+BackLightValue);
} catch (SettingNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
seekbarclicklistener
brightnessscrollbar.setOnSeekBarChangeListener(
new OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
BackLightValue = (int) ((float)arg1/100);
WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = BackLightValue;
getWindow().setAttributes(layoutParams);
}
#Override
public void onStartTrackingTouch(SeekBar arg0) {
}
#Override
public void onStopTrackingTouch(SeekBar arg0) {
int SysBackLightValue = (int)(BackLightValue * 255);
android.provider.Settings.System.putInt(getContentResolver(),
android.provider.Settings.System.SCREEN_BRIGHTNESS,
SysBackLightValue);
}
});

I came to know that Device gets stuck at the value zero
So I gave a condition on onProgresschanged as folows
public void onProgressChanged(SeekBar arg0, int arg1, boolean arg2) {
// TODO Auto-generated method stub
BackLightValue = (int) ((float)arg1/100);
if(arg1>5){
WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = BackLightValue;
getWindow().setAttributes(layoutParams);
}
}
And it works now, like a charm.

public void onProgressChanged(SeekBar seekBar, int progressValue, boolean fromUser) {
progress = progressValue;
if(progress <1 ) {
progress = 1;
}
android.provider.Settings.System.putInt(getActivity().getContentResolver(), android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE, android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
android.provider.Settings.System.putInt(getActivity().getContentResolver(),
android.provider.Settings.System.SCREEN_BRIGHTNESS,
progress);
WindowManager.LayoutParams layoutParams = window.getAttributes();
layoutParams.screenBrightness = progress / (float)255;
window.setAttributes(layoutParams);
}

Killing a Sprite in AndEngine

Hi im having a bit of problems getting my sprite to fade back in. Im using paralell entity modifiers, scaling and fading after which the sprite gets new X and Y cordinates and fades in and scales back up. It doesnt work and i think it might have something to do with the onUpdate method.
XOsprite = new Sprite(x, y, XO, engine.getVertexBufferObjectManager()) {
#Override
public boolean onAreaTouched(final TouchEvent te, final float xVal,
final float yVal) {
XOsprite.registerEntityModifier(downOut); //kill sprite
isKilled = true;
XOsprite.registerUpdateHandler(new IUpdateHandler() {
#Override
public void reset() {
// TODO Auto-generated method stub
}
#Override
public void onUpdate(float pSecondsElapsed) {
// TODO Auto-generated method stub
totalElapsedTime += pSecondsElapsed;
if(totalElapsedTime >= 3.0f){
BaseGameActivity gameActivity = (BaseGameActivity) activity;
gameActivity.runOnUpdateThread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
if(isKilled){
reviveSprite();
isKilled = false;
}
}
});
}
//reset();
}
});
return true;
}
};
XOsprite.registerEntityModifier(inUp);
gameScene.attachChild(XOsprite);
gameScene.registerTouchArea(XOsprite);
return gameScene;
}
-edit- more code
public void reviveSprite(){
setSprites();
XOsprite.unregisterEntityModifier(downOut);
XOsprite.registerEntityModifier(inUp);
}
public void setSprites(){
if (rand.nextInt(2) == 0) {
XO = X;
} else {
XO = O;
}
x = rand.nextInt(MainActivity.CAM_WIDTH);
y = rand.nextInt(MainActivity.CAM_HEIGHT);
}

you are already on the UpdateThread, so no need to do this
gameActivity.runOnUpdateThread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
if(isKilled){
reviveSprite();
isKilled = false;
}
}
});
just do this
if(isKilled){
reviveSprite();
isKilled = false;
}

Seek Bar For Zooming In-Out for image

I want to implement a zoom in and zoom out an image using seek bar. If I go to right in Seek Bar image should be zoom in and vice versa.
help me.

you can take look here. http://www.zdnet.com/blog/burnette/how-to-use-multi-touch-in-android-2-part-6-implementing-the-pinch-zoom-gesture/1847
EDITED:
checkout this how-can-i-get-zoom-functionality-for-images.

Here pos is the selected image since i have more than one image to zoom in and zoom out.
public void zoomImage(int pos)
{
if(pos==1) {
seekbar.setMax((int) 60.0f);
seekbar.setProgress(seekvalue4 * 10);
System.out.println("--------seekvalue is :" + seekvalue4 * 10);
seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
float scale = (progress / 10.0f);
//
if (scale <= 0.1f) {
return;
}
iv1.setZoom(scale);
seekvalue4 = (int) scale;
}
#Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
#Override
public void onStopTrackingTouch(SeekBar arg0) {
// TODO Auto-generated method stub
}
});
}

thread is throwing error (frame animation)

I am working on frame animation in which i am using thread but thread is throwing me error .
my code is as follow ....
public class Newton_LawsActivity extends Activity implements OnTouchListener, OnGestureListener,OnDoubleTapListener {
/** Called when the activity is first created. */
OnTouchListener l;
ImageView animation;
ImageView hideimage;
TextView t;
Thread timer;
int Rid;
double pixel;
String law="null";
private GestureDetector gestureDetector;
float x,y;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
gestureDetector = new GestureDetector(this);
// the frame-by-frame animation defined as a xml file within the drawable folder
animation = (ImageView)findViewById(R.id.image);
//animation.setBackgroundResource(R.drawable.anatomy_5);
hideimage=(ImageView)findViewById(R.id.imagein);
t=(TextView) findViewById(R.id.t);
animation.setBackgroundResource(R.anim.startanimation);
final AnimationDrawable newtonAnimation = (AnimationDrawable) animation.getBackground();
AnimationStart(newtonAnimation);
animation.setOnTouchListener(this);
}
public void AnimationStart(final AnimationDrawable newanimation){
timer=new Thread(){
#Override
public void run(){
try{
}catch(Exception e){}
finally{
Newton_LawsActivity.this.runOnUiThread(new Runnable() {
public void run(){
newanimation.start();
}});
}
}
};
timer.start();
}
#Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Toast.makeText(this, "animation", Toast.LENGTH_LONG).show();
return gestureDetector.onTouchEvent(event);
}
private void animationswitch(float x, float y) {
// TODO Auto-generated method stub
pixel = getmaskpixel(x,y,animation,hideimage);
Log.w("DEBUG","which is null:pixel" + pixel );
if (pixel==-583672){
animation.setBackgroundResource(R.anim.firstlaw_01);
final AnimationDrawable firstlaw_01 = (AnimationDrawable) animation.getBackground();
law="firstlaw_02";
firstlaw_01.start();
animationstop_01();
}
t.setText(Double.toString(pixel));
}
private double getmaskpixel(float x, float y, ImageView view,ImageView hideimage) {
// TODO Auto-generated method stub
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.touchnewtonfinal415);
int width = bm.getWidth();
int height = bm.getHeight();
float scaleWidth = ((float) view.getWidth()) / width;
float scaleHeight = ((float) view.getHeight()) / height;
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// matrix.postRotate(90);
// recreate the new Bitmap
Bitmap bitmap = Bitmap.createBitmap(bm, 0, 0, width, height,matrix, false);
Log.w("DEBUG","which is null:image " + hideimage.getWidth() + " OR " +hideimage.getHeight() );
double bmWidth = view.getWidth();
double bmHeight = view.getHeight();
if ( x < 0 || y < 0 || x > hideimage.getWidth() || y >hideimage.getHeight()){
return 0; //Invalid, return 0
}else{
//Convert touched x, y on View to on Bitmap
int xBm = (int)(x * (bmWidth / hideimage.getWidth()));
int yBm = (int)(y * (bmHeight / hideimage.getHeight()));
return bitmap.getPixel((int)xBm,(int) yBm);
}
}
public boolean onSingleTapUp(MotionEvent e) {
return false;
// TODO Auto-generated method stub
}
#Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
return true;
}
#Override
public boolean onFling(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}
#Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}
#Override
public void onShowPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public boolean onDoubleTap(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onDoubleTapEvent(MotionEvent e) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onSingleTapConfirmed(MotionEvent e) {
// TODO Auto-generated method stub
x=e.getX();
y= e.getY();
Log.w("DEBUG","which is null:image " + x + " OR " +y);
animationswitch(x, y);
return true;
}
void animationstop_01(){
if(law=="firstlaw_02"){
timer=new Thread(){
#Override
public void run(){
try{
Thread.sleep(8750);
}catch(Exception e){}
finally{
Log.w("debug","it is firstlaw_02");
animation.setBackgroundResource(R.anim.firstlaw_02);
final AnimationDrawable firstlaw_02 = (AnimationDrawable) animation.getBackground();
law="firstlaw_03";
AnimationStart(firstlaw_02);
}};
};
timer.start();
}
}
}
it is throwing me following error..
06-06 14:15:00.668: E/AndroidRuntime(966): FATAL EXCEPTION: Thread-10
06-06 14:15:00.668: E/AndroidRuntime(966): android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.ViewRoot.checkThread(ViewRoot.java:2802)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.ViewRoot.invalidateChild(ViewRoot.java:607)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.ViewRoot.invalidateChildInParent(ViewRoot.java:633)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.ViewGroup.invalidateChild(ViewGroup.java:2505)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.View.invalidate(View.java:5139)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.View.setBackgroundDrawable(View.java:7486)
06-06 14:15:00.668: E/AndroidRuntime(966): at android.view.View.setBackgroundResource(View.java:7395)
06-06 14:15:00.668: E/AndroidRuntime(966): at Newtons.law.Newton_LawsActivity$2.run(Newton_LawsActivity.java:183)

Change your animationstop_01 method to:
void animationstop_01(){
if(law=="firstlaw_02"){
timer=new Thread(){
#Override
public void run(){
try{
Thread.sleep(8750);
}catch(Exception e){
}finally{
Log.w("debug","it is firstlaw_02");
Newton_LawsActivity.this.runOnUiThread(new Runnable() {
public void run(){
animation.setBackgroundResource(R.anim.firstlaw_02);
final AnimationDrawable firstlaw_02 = (AnimationDrawable) animation.getBackground();
law="firstlaw_03";
AnimationStart(firstlaw_02);
}
});
}
};
};
timer.start();
}
}

Error is inside the mehod name animationstop_01() where you are trying,
animation.setBackgroundResource(R.anim.firstlaw_02);
put that inside runOnUiThread()

try this:
animation.post(new Runnable() {
public void run() {
animation.setBackgroundResource(R.anim.firstlaw_02);
}
});
In that way you are posting it to the UI thread. View can only be changed from the original thread that created the View.