开源框架android-async-http使用
jopen
11年前
官网:https://github.com/loopj/android-async-http
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:
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:
package com.http; import com.loopj.android.http.AsyncHttpClient; import com.loopj.android.http.AsyncHttpResponseHandler; import com.loopj.android.http.BinaryHttpResponseHandler; import com.loopj.android.http.JsonHttpResponseHandler; import com.loopj.android.http.RequestParams; public class HttpUtil { private static AsyncHttpClient client =new AsyncHttpClient(); //实例话对象 static { client.setTimeout(11000); //设置链接超时,如果不设置,默认为10s } public static void get(String urlString,AsyncHttpResponseHandler res) //用一个完整url获取一个string对象 { client.get(urlString, res); } public static void get(String urlString,RequestParams params,AsyncHttpResponseHandler res) //url里面带参数 { client.get(urlString, params,res); } public static void get(String urlString,JsonHttpResponseHandler res) //不带参数,获取json对象或者数组 { client.get(urlString, res); } public static void get(String urlString,RequestParams params,JsonHttpResponseHandler res) //带参数,获取json对象或者数组 { client.get(urlString, params,res); } public static void get(String uString, BinaryHttpResponseHandler bHandler) //下载数据使用,会返回byte数据 { client.get(uString, bHandler); } public static AsyncHttpClient getClient() { 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:
package com.http; import java.io.File; import java.io.FileOutputStream; import org.json.JSONArray; import org.json.JSONObject; import android.app.Activity; import android.app.ProgressDialog; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.view.View; import android.widget.TextView; import android.widget.Toast; import com.loopj.android.http.AsyncHttpResponseHandler; import com.loopj.android.http.BinaryHttpResponseHandler; import com.loopj.android.http.JsonHttpResponseHandler; import com.loopj.android.http.RequestParams; public class MainActivity extends Activity { private TextView textView; // 顶部textview private ProgressDialog pDialog; private TextView textView2; // 下面textview,显示获取的所有数据 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.text); textView2 = (TextView) findViewById(R.id.text2); } public void method1(View view) { pDialog = ProgressDialog.show(this, "请稍等", "数据加载中"); 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 HttpUtil.get(urlString, new AsyncHttpResponseHandler() { public void onSuccess(String arg0) { // 获取数据成功会调用这里 pDialog.dismiss(); textView.setText("获取json数据成功,看下面"); textView2.setText(arg0); Log.i("hck", arg0); }; public void onFailure(Throwable arg0) { // 失败,调用 Toast.makeText(MainActivity.this, "onFailure", Toast.LENGTH_LONG).show(); }; public void onFinish() { // 完成后调用,失败,成功,都要掉 }; }); } public void method2(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?"; RequestParams params = new RequestParams(); // 绑定参数 params.put("type", "1"); params.put("p", "2"); params.put("size", "10"); HttpUtil.get(urlString, params, new JsonHttpResponseHandler() { public void onSuccess(JSONArray arg0) { // 成功后返回一个JSONArray数据 Log.i("hck", arg0.length() + ""); try { textView.setText("菜谱名字:" + 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 } catch (Exception e) { Log.e("hck", e.toString()); } }; public void onFailure(Throwable arg0) { Log.e("hck", " onFailure" + arg0.toString()); }; public void onFinish() { Log.i("hck", "onFinish"); }; public void onSuccess(JSONObject arg0) { //返回的是JSONObject,会调用这里 Log.i("hck", "onSuccess "); try { textView.setText("菜谱名字:" + arg0.getJSONArray("list").getJSONObject(0) .getString("name")); } catch (Exception e) { Log.e("hck", e.toString()); } }; }); } public void method3(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?type=1&p=2&size=10"; HttpUtil.get(urlString, new JsonHttpResponseHandler() { public void onSuccess(JSONObject arg0) { try { textView.setText("菜谱名字:" + arg0.getJSONArray("list").getJSONObject(1) .getString("name")); } catch (Exception e) { Log.e("hck", e.toString()); } }; }); } public void method4(View view) { String urlString = "http://client.azrj.cn/json/cook/cook_list.jsp?"; final RequestParams params = new RequestParams(); params.put("type", "1"); params.put("p", "2"); params.put("size", "10"); HttpUtil.get(urlString, params, new AsyncHttpResponseHandler() { public void onSuccess(String arg0) { try { JSONObject jObject = new JSONObject(arg0); textView.setText("菜谱名字:" + jObject.getJSONArray("list").getJSONObject(2) .getString("name")); Log.i("hck", params.getEntity().toString()); } catch (Exception e) { } }; }); } public void method5(View view) { String url = "http://f.hiphotos.baidu.com/album/w%3D2048/sign=38c43ff7902397ddd6799f046dbab3b7/9c16fdfaaf51f3dee973bf7495eef01f3b2979d8.jpg"; HttpUtil.get(url, new BinaryHttpResponseHandler() { @Override public void onSuccess(byte[] arg0) { super.onSuccess(arg0); File file = Environment.getExternalStorageDirectory(); File file2 = new File(file, "cat"); file2.mkdir(); file2 = new File(file2, "cat.jpg"); try { FileOutputStream oStream = new FileOutputStream(file2); oStream.write(arg0); oStream.flush(); oStream.close(); textView.setText("可爱的猫咪已经保存在sdcard里面"); } catch (Exception e) { e.printStackTrace(); Log.i("hck", e.toString()); } } }); } }
布局文件:
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center_horizontal" > <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:gravity="center_horizontal"> <TextView android:textColor="#FF0000" android:textSize="16sp" android:layout_marginTop="20dp" android:gravity="center_horizontal" android:id="@+id/text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="获取数据完成后会显示在这里" /> <Button android:layout_marginTop="50dp" android:id="@+id/bt1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第一种" android:onClick="method1" /> <Button android:id="@+id/bt2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第2种" android:onClick="method2" /> <Button android:id="@+id/bt3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第3种" android:onClick="method3" /> <Button android:id="@+id/bt4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第4种" android:onClick="method4" /> <Button android:id="@+id/bt5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第5种" android:onClick="method5" /> <TextView android:textColor="#FF0000" android:textSize="16sp" android:layout_marginTop="20dp" android:gravity="center_horizontal" android:id="@+id/text2" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout> </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