请求网络数据后更新视图

请求网络数据后更新视图 zhaohu 发布于 2010年12月09日 20时 ( 0评) 3人收藏此代码，我要收藏(?) Android不能直接在子线程中更新视图,需要借助Handler 类来实现视图更新 标签： Android , Handler , handleMessage

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`01`	`public` `void` `onCreate(Bundle savedInstanceState) {`

`02`	`super.onCreate(savedInstanceState);`

`03`	`setContentView(R.layout.soft_recommend);`

04

`05`	`listview = (ListView) findViewById(R.id.recommSoftList);`

`06`	`//判断数据对象是否为NULL`

`07`	`if(SoftInfo.recommendSofts ==` `null){`

`08`	`//定义后台请求网络数据进度条`

`09`	`recommProBar = (ProgressBar)findViewById(R.id.recommProBar4);`

`10`	`recommProBar.setIndeterminate(false);`

`11`	`recommProBar.setVisibility(View.VISIBLE);`

`12`	`// 起始一个运行线程`

`13`	`new` `Thread(new` `Runnable() {`

`14`	`public` `void` `run() {`

`15`	`//请求网络数据`

`16`	`iconTexts = SoftInfo.getRecommImageTexts(Constants.RECOMM_SOFT_URL);`

`17`	`//执行视图更新`

`18`	`SoftRecommend.this.listHandler`

`19`	`.sendMessage(SoftRecommend.this.listHandler`

`20`	`.obtainMessage());`

21 }

`22`	`}).start();`

23 }else{

`24`	`iconTexts = SoftInfo.getImageTexts(SoftInfo.recommendSofts);`

`25`	`ImageTextAdapter adapter =` `new` `ImageTextAdapter(this);`

`26`	`adapter.setIconTexts(iconTexts);`

`27`	`adapter.setViewId(R.layout.img_txt_view);`

`28`	`listview.setAdapter(adapter);`

29 }

30 }

31 /**

`32`	`* 更新当前UI视图`

33 */

`34`	`Handler listHandler =` `new` `Handler(){`

35 /**

36 *

`37`	`* @param msg`

`38`	`* @author`

`39`	`* @date 2010-12-7`

`40`	`* (non-Javadoc)`

`41`	`* @see android.os.Handler#handleMessage(android.os.Message)`

42 */

`43`	`public` `void` `handleMessage(Message msg){`

`44`	`recommProBar.setVisibility(View.GONE);`

`45`	`ImageTextAdapter adapter =` `new` `ImageTextAdapter(SoftRecommend.this);`

`46`	`adapter.setIconTexts(iconTexts);`

`47`	`adapter.setViewId(R.layout.img_txt_view);`

`48`	`listview.setAdapter(adapter);`

`49`	`super.handleMessage(msg);`

50 }

51 };

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