Android异步更新UI的四种方式

3. 使用runOnUiThread(action)方法

package com.example.runonuithreadtest;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class MainActivity extends Activity {
 private TextView tv;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 tv = (TextView) findViewById(R.id.tv);
 new MyThread().start();
 }
 class MyThread extends Thread
 {
 @Override
 public void run() {
  runOnUiThread(new Runnable() {
  @Override
  public void run() {
   // TODO Auto-generated method stub
   try {
    //延迟两秒更新
    Thread.sleep(2000);
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
   tv.setText("更新后的TextView");
  }
  });
 }
 }
}

4. 使用Handler的post(Runnabel r)方法

package com.example.runonuithreadtest;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.widget.TextView;
public class MainActivity extends Activity {
 private TextView tv;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 tv = (TextView) findViewById(R.id.tv);
 Handler handler = new Handler();
 handler.post(new Runnable(){
  @Override
  public void run() {
  try {
   //延迟两秒更新
   Thread.sleep(2000);
  } catch (InterruptedException e) {
   e.printStackTrace();
  }
  tv.setText("更新后的TextView");
  }
 });
 }
}

以上就是四种Android异步更新UI的方式，希望对大家的学习有所帮助。

注：相关教程知识阅读请移步到Android开发频道。