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