Question

我做了一些关于计时器使用的研究，但我遇到的只是一个错误。

以下是相关代码：

package com.example.test;

import java.util.Timer;
import java.util.TimerTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Gravity;
import android.widget.Toast;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TimerTask timerTask = new TimerTask() {
            @Override
            public void run() {
                Toast wait = Toast.makeText(getApplicationContext(), "Wait", Toast.LENGTH_LONG);
                wait.setGravity(Gravity.TOP, 0, 0);
                wait.show();
            }
        };
        Timer timer = new Timer();
        timer.schedule(timerTask, 2000, 2000);

    }
}

当我跑步时，我从上面的scipt中得到一个错误。错误在哪里？

Answer 1

TimerTask doAsynchronousTask = new TimerTask() {
    @Override
    public void run() {

        //Perform background work here

        handler.post(new Runnable() {
            public void run() {
                //Perform GUI updation work here
                //Toast work also
            }
        });
    }
};
timer.schedule(doAsynchronousTask, 10, 5000);

如何在android中使用计时器？

1 个答案: