布局文件activity_main.xml:
<LinearLayout 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:gravity="center_horizontal"
android:orientation="vertical"
tools:context=".MainActivity" >
<EditText android:id="@+id/content"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<Button android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="发表"/>
<ScrollView
android:id="@+id/scrollView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="@+id/result"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
</LinearLayout>
</ScrollView>
</LinearLayout>
主类:
MainActivity.java:
package com.example.dhttpget;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Base64;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText content ;
private Button button;
private Handler handler;
private String result="";
private TextView resultTv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
content = (EditText)findViewById(R.id.content);
resultTv = (TextView)findViewById(R.id.result);
button = (Button)findViewById(R.id.button);
handler = new Handler(){
public void handleMessage(Message msg){
if(result!=null){
resultTv.setText(result);
content.setText("");
}
super.handleMessage(msg);
}
};
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
// if("".equals(content.getText().toString())){
// Toast.makeText(MainActivity.this, "请输入要发表的内容!", Toast.LENGTH_LONG).show();
// return;
// }
new Thread(new Runnable(){
public void run(){
send();
Message m = handler.obtainMessage();
handler.sendMessage(m);
}
}).start();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void send(){
String target = "http://www.baidu.com/";
URL url;
try{
url = new URL(target);
HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection();
InputStreamReader in = new InputStreamReader(urlConnection.getInputStream());
BufferedReader buffer = new BufferedReader(in);
String inputLine = null;
while((inputLine=buffer.readLine())!=null){
result+=inputLine+"\n";
}
in.close();
urlConnection.disconnect();
}catch(MalformedURLException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}
}
public String base64(String content){
try {
content = Base64.encodeToString(content.getBytes("utf-8"), Base64.DEFAULT);
content = URLEncoder.encode(content);
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return content;
}
}
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dhttpget"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.dhttpget.PostActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>
以前代码是用http get 方法访问网络,
接下来,使用http post:
布局文件与上面类似。
具体主类PostActivity.java:
package com.example.dhttpget;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class PostActivity extends Activity {
private EditText nickname;
private EditText content ;
private Button button;
private Handler handler;
private String result="";
private TextView resultTv;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dhttp_post);
content = (EditText)findViewById(R.id.content);
resultTv = (TextView)findViewById(R.id.result);
button = (Button)findViewById(R.id.button);
handler = new Handler(){
public void handleMessage(Message msg){
if(result!=null){
resultTv.setText(result);
content.setText("");
}
super.handleMessage(msg);
}
};
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
// if("".equals(content.getText().toString())){
// Toast.makeText(MainActivity.this, "请输入要发表的内容!", Toast.LENGTH_LONG).show();
// return;
// }
new Thread(new Runnable(){
public void run(){
send();
Message m = handler.obtainMessage();
handler.sendMessage(m);
}
}).start();
}
});
}
public void send(){
String targer = "http://www.baidu.com/";
URL url;
try {
url = new URL(targer);
HttpURLConnection urlConn = (HttpURLConnection)url.openConnection();
urlConn.setRequestMethod("POST");
urlConn.setDoOutput(true);
urlConn.setUseCaches(true);
urlConn.setInstanceFollowRedirects(true);
urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
DataOutputStream out = new DataOutputStream(urlConn.getOutputStream());
String param = "";
out.writeBytes(param);
out.flush();
out.close();
if(urlConn.getResponseCode()==HttpURLConnection.HTTP_OK){
InputStreamReader in = new InputStreamReader(urlConn.getInputStream());
BufferedReader buffer = new BufferedReader(in);
String inputLine = null;
while((inputLine=buffer.readLine())!=null){
result += inputLine + "\n";
}
in.close();
}
urlConn.disconnect();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
转载于:https://my.oschina.net/u/2552902/blog/543822