android 向web服务器发送post请求并获取结果
16lz
2021-01-23
android 向web服务器发送post请求并获取结果，因为 需要访问到网络必须要有权限，先在AndroidManifest.xml中加入如下配置：
发送post请求并获取结果的activity 代码如下：
<uses-permission android:name="android.permission.INTERNET" />
发送post请求并获取结果的activity 代码如下：
package httppost.pack; import java.util.ArrayList;import java.util.List;import org.apache.http.HttpResponse;import org.apache.http.NameValuePair;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.protocol.HTTP;import org.apache.http.util.EntityUtils;import android.app.Activity;import android.os.Bundle;import android.widget.TextView;public class AndroidHttpPost extends Activity { /** Called when the activity is first created. */ String action="http://www.beijibear.com/android_post.php"; HttpPost httpRequest=null; List <NameValuePair> params=null; HttpResponse httpResponse; TextView tv=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv=(TextView)findViewById(R.id.textView1); /*建立HttpPost连接*/ httpRequest=new HttpPost(action); /*Post运作传送变数必须用NameValuePair[]阵列储存*/ params=new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("username","beijibear")); try { //发出HTTP request httpRequest.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8)); //取得HTTP response httpResponse=new DefaultHttpClient().execute(httpRequest); //若状态码为200 if(httpResponse.getStatusLine().getStatusCode()==200) { //取出回应字串 String strResult=EntityUtils.toString(httpResponse.getEntity()); tv.setText(strResult); }else{ tv.setText("Error Response"+httpResponse.getStatusLine().toString()); } } catch (Exception e) { // TODO Auto-generated catch block tv.setText(e.getMessage().toString()); } } }