Develop Reference

How to make my ImageView responsive to onClickevents while .startAnimation() is running?

I'm new to android, and I'm facing a problem where I'm trying to make my ImageView, which is playing an animation through startAnimation(), to become Invisible as the user clicks on it. what happens however is that only after the animation is done the Imageview becomes invisible. my assumptions was it's because they both run on the UI thread. surprisingly however, when I changed my event handling from setVisibility to startAnimation() it actually listened to the click, interrupted the animation and restarted it!
To override my problem, which did turn out nice, I made a new Animation object that opposite to the first, which shows the Imageview, hides the Imageview and it worked perfectly, but I'm still curious as to why my Imageview was selectively responsive to different event handling?
This code change visibility only after the animation is done
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
face = (ImageView)findViewById(R.id.face);
final Animation showAnimation=AnimationUtils.loadAnimation(MainActivity.this,R.anim.animation);
face.startAnimation(showAnimation);
face.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
face.setVisibility(View.INVISIBLE);
}
});
}
this code changes the animation "while" the original is playing
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
face = (ImageView)findViewById(R.id.face);
final Animation showAnimation=AnimationUtils.loadAnimation(MainActivity.this,R.anim.animation);
face.startAnimation(showAnimation);
face.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Animation hideAnimation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.animation1);
face.startAnimation(hideAnimation);
}
});
}

You should not call face.setVisibility(...), instaed tt should be:
face.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
v.setVisibility(View.INVISIBLE);
}
});

Animation doesn't run after first click

The first time I open up my application in the emulator and click the image to run the animation nothing happens. When I go back to the home menu and then back to my app, the animation runs without me clicking anything. Subsequent clicks after this point run the animation as it was intended to run. This is using 2.3.3 in the emulator. I have not seen this issue using version 4.1.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image1 = (ImageView) findViewById(R.id.ImageView01);
image2 = (ImageView) findViewById(R.id.ImageView02);
image2.setVisibility(View.INVISIBLE);
image1.setClickable(true);
image1.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
Log.d("== My activity ===","OnClick is called"); // This gets logged on every click
Animation fade1 = AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in);
image2.startAnimation(fade1);

The previous activity exit animation is overriding your enter animation. Usually you have to stop/override those with:
activity.overridePendingTransition(R.anim.fade1, R.anim.fade_in);

How to make a page flip like animation when changing between activities?

How can I make a page flip like animation when moving from one activity to other? On some ios applications I saw this, but when I searched for android I could not find any tutorials or code snippets for this.
Please help

Yes it is possible . Please look at this tutorial.
Here's a tutorial on how to add an animation when transistioning between two activities. However, instead of using a translate animation like in the article, you'll want to use a rotate animation.

The flip animation for Activity doesn't exist on Android..sorry!

Here is demo code from sdk:
/**
* <p>Example of using a custom animation when transitioning between activities.</p>
*/
public class Animation extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_animation);
// Watch for button clicks.
Button button = (Button)findViewById(R.id.fade_animation);
button.setOnClickListener(mFadeListener);
button = (Button)findViewById(R.id.zoom_animation);
button.setOnClickListener(mZoomListener);
}
private OnClickListener mFadeListener = new OnClickListener() {
public void onClick(View v) {
// Request the next activity transition (here starting a new one).
startActivity(new Intent(Animation.this, Controls1.class));
// Supply a custom animation. This one will just fade the new
// activity on top. Note that we need to also supply an animation
// (here just doing nothing for the same amount of time) for the
// old activity to prevent it from going away too soon.
overridePendingTransition(R.anim.fade, R.anim.hold);
}
};
private OnClickListener mZoomListener = new OnClickListener() {
public void onClick(View v) {
// Request the next activity transition (here starting a new one).
startActivity(new Intent(Animation.this, Controls1.class));
// This is a more complicated animation, involving transformations
// on both this (exit) and the new (enter) activity. Note how for
// the duration of the animation we force the exiting activity
// to be Z-ordered on top (even though it really isn't) to achieve
// the effect we want.
overridePendingTransition(R.anim.zoom_enter, R.anim.zoom_exit);
}
};
}
all code is at apidemo/app/ ,:)

Why does my animation freeze when returning to activity containing it?

I'm still sort of new with Android, so forgive me if it's an obvious mistake. In this activity I'm using ViewPager to horizontally scroll through three layouts containing an ImageButton that has an animated background depending on its current state. When the button is pressed, it starts a new activity. However, when I hit the back button to go back to the activity containing the animation from the new activity, sometimes the animation freezes or plays back faster than it should. I wrote a method for starting up the animation that I use in onWindowFocusChanged(), and onRestart(). I'm working in Android 2.1 (API 7).
This is my code:
public class CopyOfWorld extends Activity{
MediaPlayer muzak;
Boolean mSwitch = false;
ImageButton holmes;
AnimationDrawable holmesAnimation;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.world);
Preferencer pp = (Preferencer)getApplicationContext();
ViewPagerAdapter adapter = new ViewPagerAdapter();
ViewPager myPager = (ViewPager) findViewById(R.id.viewpager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(1);
if(pp.getMuzak()){
mSwitch = true;
muzak = MediaPlayer.create(CopyOfWorld.this, R.raw.level1);
muzak.setLooping(true);
muzak.start();
}
}
public void clicker(View v){
Intent myIntent = new Intent(CopyOfWorld.this , Subworld.class);
startActivityForResult(myIntent, 0);
}
#Override
public void onWindowFocusChanged(boolean hasFocus){
super.onWindowFocusChanged(hasFocus);
beginRender();
}
#Override
protected void onPause(){
super.onPause();
if(mSwitch){
muzak.release();
}
}
#Override
protected void onRestart(){
super.onRestart();
Preferencer pp = (Preferencer)getApplicationContext();
if(pp.getMuzak()){
muzak = MediaPlayer.create(CopyOfWorld.this, R.raw.level1);
muzak.setLooping(true);
muzak.start();
}
beginRender();
}
public void beginRender(){
ImageButton holmes = (ImageButton) findViewById(R.id.subworlder);
StateListDrawable background = (StateListDrawable) holmes.getBackground();
Drawable current = background.getCurrent();
if(current instanceof AnimationDrawable){
holmesAnimation = (AnimationDrawable) current;
holmesAnimation.start();
}
}
}
I've tried calling the method beginRender() under ()onResume, but then the app simply crashes.
Could anyone point me in the right direction?
EDIT:
I've been tweaking the code here and there, unfortunately to no avail. But I did notice a pattern in the behavior of the animation. When I press down on the ImageButton or hold it so that it goes from its default animation to its pressed or focused animation then move my finger away from the button so that it doesn't start up the new activity, it sometimes behaves very much as I described at the beginning of this post (i.e. it's supposed to return to its default animation, but instead plays back at twice the rate, chokes up, or doesn't play at all.)
Currently the xml that contains these ImageButtons defines their backgrounds as the animations and have no source (src). But when I change the background to transparent and the src to the animations, the app crashes.
Any clues?

In Android: How do you show layout twice using intent?

Let's pretend this was my Java Class...
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button ScreentwoGameButton = (Button) findViewById(R.id.screentwo);
ScreentwoGameButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent ScreentwoGameIntent = new Intent(Main.this, Screentwo.class);
startActivity(StartGameIntent);
}
});
How do i use this code below but the right way like.
So let's put an example if I click screentwo button the screentwo.xml will show and it will allow me to click inside if any buttons are available. Instead just stare what's in the layout.
I don't want to use the Activity to activity cause the whole point is i'm trying to avoid the flashing looking feel going to another java class.
If you look at the moron test game on Android it says example: press the blue button then red and then green, so if u press the blue button the screen will remain and not flash at all but the image of the blue button will disappear and I'm allowed to click the red and then green.
Hope that helped.
Thanks
Wahid
Button ScreentwoButton = (Button) findViewById(R.id.screentwo);
ScreentwoButton.setOnClickListener(new OnClickListener() {
private Uri Uri;
#Override
public void onClick(View v) {
setContentView(R.layout.Screentwo);
Uri uri=Uri;
Intent i=new Intent(Intent.ACTION_VIEW, uri);
mSoundManager.playSound(1);
}
});

try to use:
setContentView(R.layout.next layout); in your button click.

You could use the viewflipper class and add the different layouts as childs to the viewflipper
and set the active child. Using setcontentView will be trouble some when you use findViewById for a old layout. As findViewById will look in the layout that is specified by setContentView