AsyncTask.java

package com.example.androidthreadtest;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;

import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;

/**
 * 作者： andli
 * 时间： 2017/11/1 18:17
 * 描述： 通过runOnUiThread改变TextView的值
 */
public class MainActivity extends Activity {

    @BindView(R.id.change_text)
    Button changeText;

    @BindView(R.id.text)
    TextView text;


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

        ButterKnife.bind(this);

        changeText.setText("通过AsyncTask改变TextView的值");


    }

    @OnClick(R.id.change_text)
    public void onViewClicked() {
        new MyAsyncTask().execute(); // 执行异步更新UI操作
    }

    class MyAsyncTask extends AsyncTask
 
   {

        @Override
        protected String doInBackground(String... params) {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            text.setText("AsyncTask更新");
        }
    }


}