Handler基本用法

Posted 2020-10-24

1.
mHandler = new Handler();
mRunnable = new Runnable() {
    @Override
    public void run() {
        currentPosition++;
        Log.d("recyclerBanner", currentPosition + " ");
        mOverFlyingLayoutManager.scrollToPosition(currentPosition);
        //  recyclerView.smoothScrollToPosition(currentPosition);
        mHandler.postDelayed(this, 3000);
    }
};
mHandler.postDelayed(mRunnable, 3000);

2.项目中实践用法

mainHandler.sendEmptyMessageDelayed(Url.Banner,3000);

@Override
protected void disposeMainHandlerCallMethod(Message msg) {
    super.disposeMainHandlerCallMethod(msg);
    switch(msg.what){
        case Url.Banner:
            currentPosition++;
            Log.d("recyclerBanner", currentPosition + " ");
            mOverFlyingLayoutManager.scrollToPosition(currentPosition);
            //  recyclerView.smoothScrollToPosition(currentPosition);
            mainHandler.sendEmptyMessageDelayed(Url.Banner,3000);
            break;
        default:break;
    }//end of switch
}