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android开源框架android-async-http使用

2013-07-24 17:08 567 查看

android-async-http开源框架可以是我们轻松的获取网络数据或者向服务器发送数据，使用起来也很简单，下面做简单介绍，具体详细使用看官网：https://github.com/loopj/android-async-http

1.新建项目，去官网下载zip包，解压，打开releases文件，把里面最新的jar包，考入项目工程libs目录下，引入包。

2.通过1，就可以使用了，很简单，下面是自己写的demo，用它提供的各种不同方法完成从服务器获取一个json数据：

查看源码

打印 ?

01	package com.http;

02	import com.loopj.android.http.AsyncHttpClient;

03	import com.loopj.android.http.AsyncHttpResponseHandler;

04	import com.loopj.android.http.BinaryHttpResponseHandler;

05	import com.loopj.android.http.JsonHttpResponseHandler;

06	import com.loopj.android.http.RequestParams;

08	public class HttpUtil {

09	private static AsyncHttpClient client = new AsyncHttpClient(); //实例话对象

static

12	client.setTimeout( 11000 ); //设置链接超时，如果不设置，默认为10s

14	public static void get(String urlString,AsyncHttpResponseHandler res) //用一个完整url获取一个string对象

16	client.get(urlString,res);

18	public static void get(String urlString,RequestParams params,AsyncHttpResponseHandler res) //url里面带参数

20	client.get(urlString,params,res);

22	public static void get(String urlString,JsonHttpResponseHandler res) //不带参数，获取json对象或者数组

24	client.get(urlString,res);

26	public static void get(String urlString,RequestParams params,JsonHttpResponseHandler res) //带参数，获取json对象或者数组

28	client.get(urlString,params,res);

30	public static void get(String uString,BinaryHttpResponseHandler bHandler) //下载数据使用，会返回byte数据

32	client.get(uString,bHandler);

34	public static AsyncHttpClient getClient()

36	return client;

这个类主要列出了我们常用的get方法，在要使用的地方，调用该类就行了。

具体使用的类：

查看源码

打印 ?

001	package com.http;

003	import java.io.File;

004	import java.io.FileOutputStream;

006	import org.json.JSONArray;

007	import org.json.JSONObject;

009	import android.app.Activity;

010	import android.app.ProgressDialog;

011	import android.os.Bundle;

012	import android.os.Environment;

013	import android.util.Log;

014	import android.view.View;

015	import android.widget.TextView;

016	import android.widget.Toast;

018	import com.loopj.android.http.AsyncHttpResponseHandler;

019	import com.loopj.android.http.BinaryHttpResponseHandler;

020	import com.loopj.android.http.JsonHttpResponseHandler;

021	import com.loopj.android.http.RequestParams;

023	public class MainActivity extends Activity {

024	private TextView textView; // 顶部textview

025	private ProgressDialog pDialog;

026	private TextView textView2; // 下面textview，显示获取的所有数据

@Override

028	protected void onCreate(Bundle savedInstanceState) {

029	super .onCreate(savedInstanceState);

030	setContentView(R.layout.activity_main);

031	textView = (TextView) findViewById(R.id.text);

032	textView2 = (TextView) findViewById(R.id.text2);

034	public void method1(View view) {

035	pDialog = ProgressDialog.show( this , "请稍等" , "数据加载中" );

036	String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?type=1&p=2&size=10" ; // 一個獲取菜谱的url地址

037	HttpUtil.get(urlString, new AsyncHttpResponseHandler() {

038	public void onSuccess(String arg0) { // 获取数据成功会调用这里

039	pDialog.dismiss();

040	textView.setText( "获取json数据成功，看下面" );

041	textView2.setText(arg0);

042	Log.i( "hck" ,arg0);

};

044	public void onFailure(Throwable arg0) { // 失败，调用

045	Toast.makeText(MainActivity. this , "onFailure" ,

046	Toast.LENGTH_LONG).show();

};

048	public void onFinish() { // 完成后调用，失败，成功，都要掉

};

});

052	public void method2(View view) {

053	String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?" ;

054	RequestParams params = new RequestParams(); // 绑定参数

055	params.put( "type" , "1" );

056	params.put( "p" , "2" );

057	params.put( "size" , "10" );

058	HttpUtil.get(urlString,params, new JsonHttpResponseHandler() {

059	public void onSuccess(JSONArray arg0) { // 成功后返回一个JSONArray数据

060	Log.i( "hck" ,arg0.length() + "" );

try

062	textView.setText( "菜谱名字："

063	+ arg0.getJSONObject( 2 ).getString( "name" )); //返回的是JSONArray，获取JSONArray数据里面的第2个JSONObject对象，然后获取名字为name的数据值

064	} catch (Exception e) {

065	Log.e( "hck" ,e.toString());

};

068	public void onFailure(Throwable arg0) {

069	Log.e( "hck" , " onFailure" + arg0.toString());

};

071	public void onFinish() {

072	Log.i( "hck" , "onFinish" );

};

074	public void onSuccess(JSONObject arg0) { //返回的是JSONObject，会调用这里

075	Log.i( "hck" , "onSuccess " );

try

077	textView.setText( "菜谱名字："

078	+ arg0.getJSONArray( "list" ).getJSONObject( 0 )

079	.getString( "name" ));

080	} catch (Exception e) {

081	Log.e( "hck" ,e.toString());

};

});

086	public void method3(View view) {

087	String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?type=1&p=2&size=10" ;

088	HttpUtil.get(urlString, new JsonHttpResponseHandler() {

089	public void onSuccess(JSONObject arg0) {

try

091	textView.setText( "菜谱名字："

092	+ arg0.getJSONArray( "list" ).getJSONObject( 1 )

093	.getString( "name" ));

094	} catch (Exception e) {

095	Log.e( "hck" ,e.toString());

};

});

100	public void method4(View view) {

101	String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?" ;

102	final RequestParams params = new RequestParams();

103	params.put( "type" , "1" );

104	params.put( "p" , "2" );

105	params.put( "size" , "10" );

106	HttpUtil.get(urlString,params, new AsyncHttpResponseHandler() {

107	public void onSuccess(String arg0) {

try

109	JSONObject jObject = new JSONObject(arg0);

110	textView.setText( "菜谱名字："

111	+ jObject.getJSONArray( "list" ).getJSONObject( 2 )

112	.getString( "name" ));

113	Log.i( "hck" ,params.getEntity().toString());

114	} catch (Exception e) {

};

});

119	public void method5(View view) {

120	String url = "http://f.hiphotos.baidu.com/album/w%3D2048/sign=38c43ff7902397ddd6799f046dbab3b7/9c16fdfaaf51f3dee973bf7495eef01f3b2979d8.jpg" ;

121	HttpUtil.get(url, new BinaryHttpResponseHandler() {

@Override

123	public void onSuccess( byte [] arg0) {

124	super .onSuccess(arg0);

125	File file = Environment.getExternalStorageDirectory();

126	File file2 = new File(file, "cat" );

127	file2.mkdir();

128	file2 = new File(file2, "cat.jpg" );

try

130	FileOutputStream oStream = new FileOutputStream(file2);

131	oStream.write(arg0);

132	oStream.flush();

133	oStream.close();

134	textView.setText( "可爱的猫咪已经保存在sdcard里面" );

135	} catch (Exception e) {

136	e.printStackTrace();

137	Log.i( "hck" ,e.toString());

});

布局文件：

查看源码

打印 ?

01	< ScrollView

02	xmlns:android = "http://schemas.android.com/apk/res/android"

03	xmlns:tools = "http://schemas.android.com/tools"

04	android:layout_width = "match_parent"

05	android:layout_height = "match_parent"

06	android:orientation = "vertical"

07	android:gravity = "center_horizontal"

09	< LinearLayout

10	android:layout_width = "fill_parent"

11	android:layout_height = "fill_parent"

12	android:orientation = "vertical"

13	android:gravity = "center_horizontal" >

14	< TextView

15	android:textColor = "#FF0000"

16	android:textSize = "16sp"

17	android:layout_marginTop = "20dp"

18	android:gravity = "center_horizontal"

19	android:id = "@+id/text"

20	android:layout_width = "wrap_content"

21	android:layout_height = "wrap_content"

22	android:text = "获取数据完成后会显示在这里" />

Button

24	android:layout_marginTop = "50dp"

25	android:id = "@+id/bt1"

26	android:layout_width = "wrap_content"

27	android:layout_height = "wrap_content"

28	android:text = "第一种"

29	android:onClick = "method1"

/>

Button

32	android:id = "@+id/bt2"

33	android:layout_width = "wrap_content"

34	android:layout_height = "wrap_content"

35	android:text = "第2种"

36	android:onClick = "method2"

/>

Button

39	android:id = "@+id/bt3"

40	android:layout_width = "wrap_content"

41	android:layout_height = "wrap_content"

42	android:text = "第3种"

43	android:onClick = "method3"

/>

Button

46	android:id = "@+id/bt4"

47	android:layout_width = "wrap_content"

48	android:layout_height = "wrap_content"

49	android:text = "第4种"

50	android:onClick = "method4"

/>

Button

53	android:id = "@+id/bt5"

54	android:layout_width = "wrap_content"

55	android:layout_height = "wrap_content"

56	android:text = "第5种"

57	android:onClick = "method5"

/>

59	< TextView

60	android:textColor = "#FF0000"

61	android:textSize = "16sp"

62	android:layout_marginTop = "20dp"

63	android:gravity = "center_horizontal"

64	android:id = "@+id/text2"

65	android:layout_width = "wrap_content"

66	android:layout_height = "wrap_content"

/>

68	</ LinearLayout >

69	</ ScrollView >

很简单很实用，上面只是get方法的，上传数据，和这个也差不多，大家自己建个服务器，试试。记得加入网文网络的权限和向sdcard的访问权限

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