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