注意,在用Post時,傳遞變量必須用NameValuePais[]數組存儲,通過HttpRequest.setEntity()方法來發出http請求。
此外,也必須通過DefaultHttpClient().execute(httpRequest)添加HttpRequest對象來接收web server的回覆,在通過httpResponse.getEntity()取出回覆信息.
在androidManifest.xml中必須添加權限:
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
/*必需引用apache.http相關類別來建立HTTP聯機*/
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
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;
/*必需引用java.io 與java.util相關類來讀寫文件*/
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class EX08_01 extends Activity
{
/*聲明兩個Button對象,與一個TextView對象*/
private Button mButton1,mButton2;
private TextView mTextView1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/*透過findViewById建構子建立TextView與Button對象*/
mButton1 =(Button) findViewById(R.id.myButton1);
mButton2 =(Button) findViewById(R.id.myButton2);
mTextView1 = (TextView) findViewById(R.id.myTextView1);
/*設定OnClickListener來聆聽OnClick事件*/
mButton1.setOnClickListener(new Button.OnClickListener()
{
/*重寫onClick事件*/
@Override
public void onClick(View v)
{
/*聲明網址字符串*/
String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Post/index.php";
/*建立HTTP Post聯機*/
HttpPost httpRequest = new HttpPost(uriAPI);
/*
* Post運作傳送變量必須用NameValuePair[]數組儲存
*/
List <NameValuePair> params = new ArrayList <NameValuePair>();
params.add(new BasicNameValuePair("str", "I am Post String"));
try
{
/*發出HTTP request*/
httpRequest.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
/*取得HTTP response*/
HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
/*若狀態碼爲200 ok*/
if(httpResponse.getStatusLine().getStatusCode() == 200)
{
/*取出響應字符串*/
String strResult = EntityUtils.toString(httpResponse.getEntity());
mTextView1.setText(strResult);
}
else
{
mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
}
}
catch (ClientProtocolException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (IOException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (Exception e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
}
});
mButton2.setOnClickListener(new Button.OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
/*聲明網址字符串*/
String uriAPI = "http://www.dubblogs.cc:8751/Android/Test/API/Get/index.php?str=I+am+Get+String";
/*建立HTTP Get聯機*/
HttpGet httpRequest = new HttpGet(uriAPI);
try
{
/*發出HTTP request*/
HttpResponse httpResponse = new DefaultHttpClient().execute(httpRequest);
/*若狀態碼爲200 ok*/
if(httpResponse.getStatusLine().getStatusCode() == 200)
{
/*取出響應字符串*/
String strResult = EntityUtils.toString(httpResponse.getEntity());
/*刪除多餘字符*/
strResult = eregi_replace("(/r/n|/r|/n|/n/r)","",strResult);
mTextView1.setText(strResult);
}
else
{
mTextView1.setText("Error Response: "+httpResponse.getStatusLine().toString());
}
}
catch (ClientProtocolException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (IOException e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
catch (Exception e)
{
mTextView1.setText(e.getMessage().toString());
e.printStackTrace();
}
}
});
}
/* 自定義字符串取代函數 */
public String eregi_replace(String strFrom, String strTo, String strTarget)
{
String strPattern = "(?i)"+strFrom;
Pattern p = Pattern.compile(strPattern);
Matcher m = p.matcher(strTarget);
if(m.find())
{
return strTarget.replaceAll(strFrom, strTo);
}
else
{
return strTarget;
}
}
}