Java使用新浪微博API通过账号密码方式登陆微博的实例

今天下了个新浪微博的API研究研究，目前实现了发布微博功能，包括带图片的微博。为了安全，新浪微博的API中并没有提供用微博帐号密码登录的功能，而是采用OAuth授权，用户通过浏览器访问新浪网站登录，登录成功后，浏览器再返回key和secret给程序。

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="@+id/login"
android:text="登录" />
<EditText android:id="@+id/status" android:layout_width="fill_parent"
android:layout_height="300sp" android:hint="输入微博消息" />
<Button android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="@+id/send"
android:text="发布" />
</LinearLayout>

一个登录按钮，一个输入框，一个发布按钮
因为要接收浏览器返回的数据，所以，AndroidManifest.xml注册Activity的时候要加个Intent-Filter

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pocketdigi.weibo" android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />

<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".Main" android:label="@string/app_name">
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 <intent-filter>
 <action android:name="android.intent.action.VIEW" />
 <category android:name="android.intent.category.DEFAULT" />
 <category android:name="android.intent.category.BROWSABLE" />
 <data android:scheme="sina" android:host="weibo" />
 <!-- 监控sina://weibo这样的地址 -->
 </intent-filter>
</activity>
</application>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
</manifest>

intent-filter必须分成两段写，如果合在一起写，就启动不了了。
为了简便，直接把新浪Sample里的OAuthConstant类拷过来：

package weibo4android.androidexamples;

import weibo4android.Weibo;
import weibo4android.http.AccessToken;
import weibo4android.http.RequestToken;

public class OAuthConstant {
private static Weibo weibo=null;
private static OAuthConstant instance=null;
private RequestToken requestToken;
private AccessToken accessToken;
private String token;
private String tokenSecret;
private OAuthConstant(){};
public static synchronized OAuthConstant getInstance(){
if(instance==null)
 instance= new OAuthConstant();
return instance;
}
public Weibo getWeibo(){
if(weibo==null)
 weibo= new Weibo();
return weibo;
}

public AccessToken getAccessToken() {
return accessToken;
}
public void setAccessToken(AccessToken accessToken) {
this.accessToken = accessToken;
this.token=accessToken.getToken();
this.tokenSecret=accessToken.getTokenSecret();
}
public RequestToken getRequestToken() {
return requestToken;
}
public void setRequestToken(RequestToken requestToken) {
this.requestToken = requestToken;
}
public String getToken() {
return token;
}
public void setToken(String token) {
this.token = token;
}
public String getTokenSecret() {
return tokenSecret;
}
public void setTokenSecret(String tokenSecret) {
this.tokenSecret = tokenSecret;
}

}

接下来就是最关键的主程序：

package com.pocketdigi.weibo;

import java.io.File;

import weibo4android.Weibo;
import weibo4android.WeiboException;
import weibo4android.http.AccessToken;
import weibo4android.http.RequestToken;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Main extends Activity {
/** Called when the activity is first created. */
String key = "", secret = "";
Button login,send;
EditText status;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
System.setProperty("weibo4j.oauth.consumerKey", "3997936609");
System.setProperty("weibo4j.oauth.consumerSecret",
 "8bc9e3bfd6ae8e3b2b8bda9079918950");
//设置在新浪应用开放平台申请的应用的key和secret
login=(Button)findViewById(R.id.login);
send=(Button)findViewById(R.id.send);
status=(EditText)findViewById(R.id.status);
login.setOnClickListener(new OnClickListener(){

@Override
 public void onClick(View v) {
 // TODO Auto-generated method stub
 login();
 //登录
 }});
send.setOnClickListener(new OnClickListener(){

@Override
 public void onClick(View v) {
 // TODO Auto-generated method stub
 String text=String.valueOf(status.getText());
 Weibo weibo = new Weibo();
 weibo.setToken(key,secret);
 try {
  //weibo.updateStatus(text);
  //只发文字
  File f=new File("/sdcard/wallpaper/129567208597069400.jpg");
  weibo.uploadStatus(text,f );
  //发文字+图片，这里需要导入commons-httpclient-3.0.1.jar，自己网上下
  //在实际项目上，最好放Thread里，因为按下去的时候按钮会卡
 } catch (WeiboException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 }});
}

@Override
protected void onStart() {
// TODO Auto-generated method stub
super.onStart();
//启动时执行检测是否来自网页登录返回
//如果是，获取key和secret
//否则读取SharedPreferences
//若得不到key和secret，直接跳转登录
Uri uri = this.getIntent().getData();
if (uri != null) {
 //如果是浏览器返回
 try {
 RequestToken requestToken = OAuthConstant.getInstance()
  .getRequestToken();
 AccessToken accessToken = requestToken.getAccessToken(uri
  .getQueryParameter("oauth_verifier"));
 OAuthConstant.getInstance().setAccessToken(accessToken);
 // 保存
 Editor sharedata = getSharedPreferences("WeiBo", 0).edit();
 sharedata.putString("key", accessToken.getToken());
 sharedata.putString("secret", accessToken.getTokenSecret());
 sharedata.commit();
 key = accessToken.getToken();
 secret = accessToken.getTokenSecret();
 } catch (WeiboException e) {
 e.printStackTrace();
 }
} else {
 //如果是用户自己启动
 SharedPreferences settings = getSharedPreferences("WeiBo", 0);
 key = settings.getString("key", "");
 secret = settings.getString("secret", "");
}
if (key.equals("") || secret.equals("")) {
 Toast.makeText(this, "尚未登录", Toast.LENGTH_LONG).show();
 login();
 //跳转到浏览器登录

}

}
public void login(){
  Weibo weibo = OAuthConstant.getInstance().getWeibo();
  RequestToken requestToken;
try {
 requestToken =weibo.getOAuthRequestToken("sina://weibo");
 //为了避免与同类应用冲突，还是自己改下URI吧
 Uri uri2 = Uri.parse(requestToken.getAuthenticationURL()+ "&from=xweibo");
 OAuthConstant.getInstance().setRequestToken(requestToken);
 startActivity(new Intent(Intent.ACTION_VIEW, uri2));
} catch (WeiboException e) {
 e.printStackTrace();
}
}
}

发图片需要导入commons-httpclient-3.0.1.jar，否则启动报错，当然weibo4android-1.2.0.jar是不可少的