使用TransitionDrawable渐变切换多张图片，供大家参考，具体内容如下
1、定义变量
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private int change = 0;//记录下标private int[] ids = new int[]{R.drawable.anim_one, R.drawable.anim_two, R.drawable.anim_three};private Drawable[] drawables;//图片集合private Thread mThread;//线程private boolean mThreadFlag = true;//线程结束标志符 |
2、填充图片
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private void initDrawableView() { //填充图片 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、定义hander
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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++;//改变标识位置 repeatPlay.setBackground(transitionDrawable); transitionDrawable.startTransition(duration); return false; } }); |
4、开启线程发送消息，让transition一直在改变
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private class MyRunnable implements Runnable { @Override public void run() { //这个while(true)是做死循环 while (mThreadFlag) { int duration = 5000;//改变的间隔 Message message = mHandler.obtainMessage(); message.arg1 = duration; mHandler.sendMessage(message); try { Thread.sleep(duration); //隔duration秒发送一次 } catch (InterruptedException e) { e.printStackTrace(); } } } } |
5、在onCreate()中开启线程，改变transition,切换图片
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mThread = new Thread(new MyRunnable());mThread.start(); |
6、在onDestroy()中结束线程
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mThreadFlag = false;//结束线程 |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/sinat_25112321/article/details/79141481
