Android更新UI的五种方式

package com.chao.updateui;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends Activity implements OnClickListener{
private Layout layout;
private Handler handler;

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

private void initLayout(){
layout=new Layout();
layout.helloText=(TextView) findViewById(R.id.helloText);
layout.webImg=(ImageView) findViewById(R.id.webImg);
layout.button1=(Button) findViewById(R.id.button1);
layout.button2=(Button) findViewById(R.id.button2);
layout.button3=(Button) findViewById(R.id.button3);
layout.button4=(Button) findViewById(R.id.button4);
layout.button5=(Button) findViewById(R.id.button5);
layout.button1.setOnClickListener(this);
layout.button2.setOnClickListener(this);
layout.button3.setOnClickListener(this);
layout.button4.setOnClickListener(this);
layout.button5.setOnClickListener(this);
}

private void initValue(){
layout.button1.setText("1.Handler.post");
layout.button2.setText("2.activity.runOnUiThread");
layout.button3.setText("3.view.post");
layout.button4.setText("4.handler+Thread");
layout.button5.setText("5.AsyncTask");
}

private class Layout{
TextView helloText;
ImageView webImg;
Button button1;
Button button2;
Button button3;
Button button4;
Button button5;
}

//1.Handler.post
private void method_1(){
new Handler().postDelayed(new Runnable() {

@Override
public void run() {
layout.helloText.setText("Handler的postDelayed延时一秒");
}
}, 1000);
}
//2.activity.runOnUiThread
private void method_2(){
new Thread(new Runnable() {

@Override
public void run() {
try {
Thread.sleep(1000);
runOnUiThread(new Runnable() {

@Override
public void run() {
layout.helloText.setText("在子线程中使用activity.runOnUiThread");
}
});
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
//3.view.post
private void method_3(){
new Thread(new Runnable() {

@Override
public void run() {
try {
Thread.sleep(1000);
layout.helloText.post(new Runnable() {

@Override
public void run() {
layout.helloText.setText("在子线程中使用TextView.post");
}
});
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
//4.Handler+Thread
private void method_4(){
handler=new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if(msg.what==1){
Bundle bundle=msg.getData();
String name=bundle.getString("name");
String sex=bundle.getString("sex");
String age=bundle.getString("age");
layout.helloText.setText(name+"\n"+sex+"\n"+age);
}
}
};
Thread thread=new Thread(new Runnable() {

@Override
public void run() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Message msg=Message.obtain();
msg.what=1;

Bundle bundle=new Bundle();
bundle.putString("name", "张三");
bundle.putString("sex", "男");
bundle.putString("age", "16");
msg.setData(bundle);

handler.sendMessage(msg);
}
});
thread.start();
}
//5.AsyncTask
private void method_5(){
AsyncTask<String, Integer, Bitmap> async=new AsyncTask<String, Integer, Bitmap>(){
@Override
protected Bitmap doInBackground(String... params) {
publishProgress(0);
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(params[0]);
publishProgress(30);
final Bitmap bitmap;
try {
HttpResponse response = client.execute(get);
bitmap = BitmapFactory.decodeStream(response.getEntity()
.getContent());
} catch (Exception e) {
return null;
}
publishProgress(100);
return bitmap;
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
layout.helloText.setText("进度-"+values[0]+"%");
}
@Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
if(result==null){
layout.helloText.setText("获取图片失败");
}else{
layout.helloText.setText("获取图片成功");
layout.webImg.setImageBitmap(result);
}
}
@Override
protected void onPreExecute() {
layout.webImg.setImageBitmap(null);
}

};
async.execute("http://imgsize.ph.126.net/?imgurl=http://img2.ph.126.net/-RloZHuMn-ultOW_YDF5fQ==/"
+ "6608648723609095427.jpg_96x96x0x90.jpg");
}

@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.button1:
method_1();
break;
case R.id.button2:
method_2();
break;
case R.id.button3:
method_3();
break;
case R.id.button4:
method_4();
break;
case R.id.button5:
method_5();
break;
default:
break;
}
}
}