public void timer(){
Timer timer = new Timer();
TimerTask task = new TimerTask() {
@Override
public void run() {
getActivity().runOnUiThread(new Runnable() {
public void run() {
double b;
b++;
tv.setText(b+");
}
});
}
};
timer.schedule(task, 1, 1000);
}
在网上找的使用getActivity()方法使用后结果提示空指针异常
报错如下
java.lang.NullPointerException
at com.example.anzuo.HuituActivity$1.run(HuituActivity.java:35)
at java.util.Timer$TimerImpl.run(Timer.java:284)