应用WebView实现新浪微博OAuth登录

?

#新浪官方下载SDK(weibo4android)

http://open.weibo.com/wiki/index.php/SDK

?

#申请应用KEY

登录新浪微博，进入http://open.weibo.com/申请应用，获取KEY和SECRET。

?

#准备

在项目中导入commons-httpclient-3.x.jar并加入weibo4android、weibo4android.http、weibo4android.org.json、weibo4android.util包文件(这些都是官方下载的SDK提供的文件)

?

在跳转到新浪微博授权页面时会使用默认浏览器，这个不太好看，也有些用户手机用其他如UC等浏览器。因此，我决定用WebView代换默认浏览器。

默认浏览器

?

WebView代换

?

在我的项目中，有多个应用项目需要OAuth登录，因此需要做成共通，也考虑到应用今后可能会支持如腾讯微博、人人网、支付宝等多种方式登录，所以我的代码考虑了“开-闭原则”。

?

?

package com.oauth;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;

public class ShareWithOAuthActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        findViewById(R.id.share_button).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View button) {
                OAuth.share(ShareWithOAuthActivity.this);
            }
        });
    }
}

?

?

package com.oauth;

import com.db.DbHelper;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.widget.Toast;

public class Share {
    public static final String SINA = "sina";
    public static final String TENCENT = "tencent";

    private static AlertDialog alertDialog = null;
    private static String[] shareList = null;
    private static String[] fullShareList = null;
    public static void share(final Context context, final String content) {
        if (shareList == null) {
            shareList = context.getResources().getStringArray(R.array.share_list);
            fullShareList = new String[shareList.length];
            for (int i=0; i<shareList.length; i++) {
                fullShareList[i] = "分享到" + shareList[i];
            }
        }
        if (alertDialog == null) {
            AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
            dialogBuilder.setTitle("分享");
            dialogBuilder.setItems(fullShareList, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int position) {
                    String flag = text2Flag(context, shareList[position]);
                    if (flag != null) {
                        oauthLogin(context, flag, content);
                    }
                }
            });
            alertDialog = dialogBuilder.create();
        }
        alertDialog.show();
    }
    
    public static String text2Flag(Context context, String text) {
        String result = null;
        if ("新浪微博".equals(text)) {
            result = SINA;
        } else if ("腾讯微博".equals(text)) {
            result = TENCENT;
        } else {
            Toast.makeText(context, "没有匹配的类型", Toast.LENGTH_SHORT).show();
        }
        return result;
    }
    
    public static void oauthLogin(Context context, String flag, String content) {
        Intent intent = new Intent();
        intent.putExtra("oauth_type", flag);
        intent.putExtra("share_content", content);
        Cursor cursor = DbHelper.getUserByFlag(flag);
        if (cursor != null && cursor.moveToFirst()) {
            intent.putExtra("token", cursor.getString(cursor.getColumnIndex("token")));
            intent.putExtra("secret", cursor.getString(cursor.getColumnIndex("secret")));

            intent.setClass(context, ShareActivity.class);
        } else {
            if (SINA.equals(flag)) {
                intent.setClass(context, SinaOAuth.class);
            } else if (TENCENT.equals(flag)) {
                intent.setClass(context, TencentOAuth.class);
            }
        }
        if(cursor != null) cursor.close();
        context.startActivity(intent);
    }
}

?

res/layout/oauth_webview_layout.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">
  <TextView android:id="@+id/oauth_webview_title"
	  android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:background="#996633"
      android:textColor="#000"
      android:textSize="18dp" />
  <WebView android:id="@+id/oauth_webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
</LinearLayout>

?

?

package com.oauth;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.webkit.WebView;
import android.widget.TextView;
import android.webkit.WebViewClient;

public abstract class OAuthActivity extends Activity {
    protected static OAuthActivity oauthActivity;
    protected TextView titleView;
    protected WebView oauthWebView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.oauth_webview_layout);

        initViews();
        oauthLogin();
    }
    
    private void initViews() {
        titleView = (TextView)findViewById(R.id.oauth_webview_title);
        
        oauthWebView = (WebView)findViewById(R.id.oauth_webview);
        oauthWebView.getSettings().setJavaScriptEnabled(true);
        oauthWebView.setWebViewClient(new WebViewClient() {
	        @Override
	        public boolean shouldOverrideUrlLoading(WebView view, String url) {
	        	if (url == null) return false;
	        	if (url.startsWith("weibo4android")) {
	        		Intent intent = new Intent(OAuthActivity.this, CallbackActivity.class);
	        		intent.setData(Uri.parse(url));
	        		OAuthActivity.this.startActivity(intent);
	        	} else {
	                view.loadUrl(url);//腾讯微博在载入授权页面时会跳转，这里不写会用默认浏览器加载页面
	        	}
	            return true;
	        }
        });
    }
    
    protected abstract void oauthLogin();
    protected abstract void callback(Intent callbackIntent);
    
    public static void postLogin(Intent callbackIntent) {
        if (oauthActivity != null) {
            oauthActivity.callback(callbackIntent);
        }
        oauthActivity = null;
    }
}

?

package com.oauth;

import com.db.DbHelper;

import weibo4android.Weibo;
import weibo4android.WeiboException;
import weibo4android.http.AccessToken;
import weibo4android.http.RequestToken;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;

public class SinaOAuth extends OAuthActivity {
	private RequestToken requestToken;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        titleView.setText("新浪微博登录");
    }

    @Override
    protected void oauthLogin() {
        System.setProperty("weibo4j.oauth.consumerKey", Weibo.CONSUMER_KEY);
        System.setProperty("weibo4j.oauth.consumerSecret", Weibo.CONSUMER_SECRET);
        Weibo weibo = new Weibo();
        try {
            requestToken = weibo.getOAuthRequestToken("weibo4android://CallbackActivity");
            Uri uri = Uri.parse(requestToken.getAuthenticationURL()+ "&display=mobile");
            oauthWebView.loadUrl(uri.toString());//自定义WebView
        } catch (WeiboException e) {
            e.printStackTrace();
        }
        oauthActivity = this;//此处很关键
    }

    @Override
    public void callback(Intent callbackIntent) {
        Uri uri = callbackIntent.getData();
        AccessToken accessToken = null;
        try {
            accessToken = requestToken.getAccessToken(uri.getQueryParameter("oauth_verifier"));
        } catch (WeiboException e) {
            e.printStackTrace();
            return;
        }

        DbHelper.persistUser(Share.SINA, accessToken.getUserId(), accessToken.getToken(), accessToken.getTokenSecret());
        
        Intent intent = this.getIntent();
        intent.putExtra("oauth_type", Share.SINA);
        intent.putExtra("token", accessToken.getToken());
        intent.putExtra("secret", accessToken.getTokenSecret());
        intent.setClass(this, ShareActivity.class);
        this.startActivity(intent);
        this.finish();
    }
}

?

package com.oauth;

import android.app.Activity;
import android.os.Bundle;

public class CallbackActivity extends Activity {
	
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		OAuthActivity.postLogin(this.getIntent());
	}
}

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

    <application android:name="com.application.CommonApplication"
        android:icon="@drawable/icon"
        android:theme="@style/theme"
        android:label="@string/app_name">
        <activity android:name=".ShareWithOAuthActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".CallbackActivity">
            <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="weibo4android" android:host="CallbackActivity" /> 
            </intent-filter>
        </activity>
        <activity android:name=".SinaOAuth" android:theme="@android:style/Theme.NoTitleBar" />
        <activity android:name=".TencentOAuth" android:theme="@android:style/Theme.NoTitleBar" />
        <activity android:name=".ShareActivity" android:launchMode="singleTask"/>
        <activity android:name=".ChangeAccountActivity" />
    </application>
</manifest>