固定周期运行线程handler

如题，我写的代码如下，目前代码不能重复周期执行。

请牛人出来帮忙解决。

mRunnable = new Runnable(){
@Override
public void run() {
if(count == 0){
setImage();
count = 1;
}
else{
weather = mContentResolver.getType(mUri);
setWeather(weather);
count = 0;
}
} 
};
mHandler = new Handler();
mHandler.postDelayed(mRunnable, 3000);

 m_Handler = new Handler();
 mRunnable = new Runnable(){
   @Override
   public void run() {
   if(count == 0){
   // do something
   count = 1;
   }
   else if (count==1){
    // do something
   count = 0;
   }
   m_Handler.postDelayed(mRunnable, 3000);// 将这个移动到run method中
   } 
   };
  mRunnable.run(); // missing

你可以去看下TimerTask

new Handler().post(mRunnable);就OK了吧