Android异步任务处理_多线程

主进程更新UI： 会阻塞

---

MainActivity.java Java文件

package com.example.hongweipc.first;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    Thread.sleep(1000);
                    System.out.println(">>>>>>>>>>>>>>>>>>>Tick");
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

activity_main.xml 布局文件

AndroidManifest.xml

运行情况

---

与上面代码只有MainActivity.java文件有修改
线程更新UI：不会阻塞

package com.example.hongweipc.first;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new Thread() {

                    @Override
                    public void run() {

                        try {
                            while (true) {
                                sleep(1000);
                                System.out.println(">>>>>>>>>>>>>>>>>>>Tick");
                            }
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }
                }.start();
            }
        });

    }
}

线程运行情况