Android Use TransitionDrawable Gradient to Switch Multiple Pictures
- 2021-10-15 11:27:41
- OfStack
Use TransitionDrawable gradient to switch multiple pictures for your reference, the specific contents are as follows
1. Define variables
private int change = 0;// Record subscript
private int[] ids = new int[]{R.drawable.anim_one, R.drawable.anim_two, R.drawable.anim_three};
private Drawable[] drawables;// Picture collection
private Thread mThread;// Thread
private boolean mThreadFlag = true;// Thread end identifier
2. Fill in the picture
private void initDrawableView() {
// Fill in a picture
drawables = new Drawable[ids.length];
for (int i = 0; i < ids.length; i++) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
drawables[i] = getDrawable(ids[i]);
} else {
drawables[i] = getResources().getDrawable(ids[i]);
}
}
}
3. Define hander
private Handler mHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
int duration = msg.arg1;
TransitionDrawable transitionDrawable = new TransitionDrawable(new Drawable[]{drawables[change % ids.length],
drawables[(change + 1) % ids.length]});
change++;// Change the location of the logo
repeatPlay.setBackground(transitionDrawable);
transitionDrawable.startTransition(duration);
return false;
}
});
4. Open the thread to send messages, so that transition1 can be changed directly
private class MyRunnable implements Runnable {
@Override
public void run() {
// This while(true) Is to do an infinite loop
while (mThreadFlag) {
int duration = 5000;// The interval of change
Message message = mHandler.obtainMessage();
message.arg1 = duration;
mHandler.sendMessage(message);
try {
Thread.sleep(duration);
// Septum duration Send in seconds 1 Times
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
5. Open the thread in onCreate (), change transition, and switch pictures
mThread = new Thread(new MyRunnable());
mThread.start();
6. End the thread in onDestroy ()
mThreadFlag = false;// End thread