需要Internet权限，AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET"/>
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:text="id:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/input_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="99"/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:text="name:"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<EditText
android:id="@+id/input_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="测试名称"/>
</LinearLayout>
<Button
android:id="@+id/btn01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="发送Post请求" /> <TextView
android:id="@+id/info"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/btn02"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="获取图片" />
<ImageView
android:id="@+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
MainActivity.java
public class MainActivity extends Activity {
private TextView info=null;
private Button btn01=null;
private static final String strURL="http://192.168.1.2/android.ashx";
private boolean flag=false; //判断是否成功
private EditText input_id=null;
private EditText input_name=null;
private Button btn02=null;
private ImageView img=null;
private static final String imgURL="http://www.baidu.com/img/bdlogo.gif";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.activity_main);
this.input_id=(EditText)super.findViewById(R.id.input_id);
this.input_name=(EditText)super.findViewById(R.id.input_name);
this.info=(TextView)super.findViewById(R.id.info);
this.btn01=(Button)super.findViewById(R.id.btn01);
this.btn01.setOnClickListener(new OnClickListenerimpl());
this.img=(ImageView)super.findViewById(R.id.img);
this.btn02=(Button)super.findViewById(R.id.btn02);
this.btn02.setOnClickListener(new OnClickListenerimpl());
}
private class OnClickListenerimpl implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btn01:
try {
HttpPost request=new HttpPost(strURL);
List<NameValuePair> params=new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", input_id.getText().toString()));
params.add(new BasicNameValuePair("name", input_name.getText().toString()));
request.setEntity(new UrlEncodedFormEntity(params,HTTP.UTF_8));
HttpResponse response=new DefaultHttpClient().execute(request);
if(response.getStatusLine().getStatusCode()!=404){
//flag=Boolean.parseBoolean(EntityUtils.toString(response.getEntity()).trim());
MainActivity.this.info.setText(EntityUtils.toString(response.getEntity()).trim());
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
case R.id.btn02:
System.out.println(">>Btn02");
try {
byte data[] = MainActivity.this.getUrlData();
System.out.println(">>data_length:"+data.length);
Bitmap bmp=BitmapFactory.decodeByteArray(data, 0, data.length); //二进制到图片
MainActivity.this.img.setImageBitmap(bmp);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
break;
default:
break;
}
}
}
public byte[] getUrlData() throws Exception{
ByteArrayOutputStream bos=null; //内存操作流
try {
URL url=new URL(imgURL);
bos=new ByteArrayOutputStream();
byte data[] =new byte[1024];
HttpURLConnection conn=(HttpURLConnection)url.openConnection();
InputStream input=conn.getInputStream();
int len =0;
while ((len=input.read(data))!=-1) {
bos.write(data,0,len);
}
return bos.toByteArray();
} catch (Exception e) {
throw e;
} finally{
if(bos!=null){
bos.close();
}
}
}使用C#的一般处理程序来接收Post来的信息，然后输出的内容会在Android程序上显示
android.ashx.cs
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
int id = string.IsNullOrEmpty(context.Request.Form["id"]) ? : Convert.ToInt32(context.Request.Form["id"]);
string name = string.IsNullOrEmpty(context.Request.Form["name"]) ? "null" : context.Request.Form["name"].ToString();
if (id != && name != "null")
{
context.Response.Write(string.Format("传递参数的id是{0},传递参数的用户名是{1}", id, name));
}
else
{
context.Response.Write("参数错误");
} }