ANDROID_MARS学习笔记_S04_006_用获取access_token,access_token_secrect

一、代码流程

1.MainActivity会开启PrepareRequestTokenActivity

2.PrepareRequestTokenActivity会根据配置文件的CONSUMER_KEY、CONSUMER_SECRET生成consumer

根据REQUEST_URL、ACCESS_URL、AUTHORIZE_URL生成provider，然后开启OAuthRequestTokenTask，执行异步操作，访问腾讯网络

3.在OAuthRequestTokenTask的doInBackground()中，provider.retrieveRequestToken()会指定回调地址，这里是指定“x-oauthflow://callback”

而在manifext.xml中，为PrepareRequestTokenActivity设置了<data android:scheme="x-oauthflow" android:host="callback"/>，所以一当OAuthRequestTokenTask成功返回后回调PrepareRequestTokenActivity，而PrepareRequestTokenActivity又设置了android:launchMode="singleTask"，所以回调是是调用PrepareRequestTokenActivity的onNewIntent()，而不是onCreate()。

二、代码
1.xml
(1)activity_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:id="@+id/btn_launch_oauth"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="Launch OAuth Flow"
                 android:onClick="startPrepareRequestTokenActivity"/>

             <TextView android:id="@+id/response_code"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text=""
                 android:textColor="#FFFFFF"
                 android:typeface="normal"/>
 </LinearLayout>

(2)AndroidManifest.xml

         <activity android:name=".PrepareRequestTokenActivity" android:launchMode="singleTask">
             <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="x-oauthflow" android:host="callback"/>
             </intent-filter>
         </activity>
     </application>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.READ_CONTACTS" />

2.java
(1)MainActivity.java

 package org.oauth;

 import org.oauth.R;

 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;

 public class MainActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
     }

     public void startPrepareRequestTokenActivity(View view) {
         startActivity(new Intent().setClass(view.getContext(), PrepareRequestTokenActivity.class));
     }
 }

(2)PrepareRequestTokenActivity.java

 package org.oauth;

 import oauth.signpost.OAuthConsumer;
 import oauth.signpost.OAuthProvider;
 import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
 import oauth.signpost.commonshttp.CommonsHttpOAuthProvider;
 import android.app.Activity;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
 import android.preference.PreferenceManager;

 public class PrepareRequestTokenActivity extends Activity {

     private OAuthConsumer consumer;
     private OAuthProvider provider;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         consumer = new CommonsHttpOAuthConsumer(Constants.CONSUMER_KEY, Constants.CONSUMER_SECRET);
         provider = new CommonsHttpOAuthProvider(Constants.REQUEST_URL, Constants.ACCESS_URL, Constants.AUTHORIZE_URL);
         new OAuthRequestTokenTask(this, consumer, provider).execute();
     }

     //由于设置了<activity android:name=".PrepareRequestTokenActivity" android:launchMode="singleTask">
     //所以回调会调用此方法，而不要调用 onCreate()
     @Override
     public void onNewIntent(Intent intent) {
         super.onNewIntent(intent);
         //最后获取的access_token,access_token_secet都存在prefs
         SharedPreferences prefs = PreferenceManager
                 .getDefaultSharedPreferences(this);
         final Uri uri = intent.getData();
         System.out.println(uri.toString());
         if (uri != null
                 && uri.getScheme().equals(Constants.OAUTH_CALLBACK_SCHEME)) {
             new RetrieveAccessTokenTask(this, consumer, provider, prefs)
                     .execute(uri);
             finish();
         }
     }
 }

(3)OAuthRequestTokenTask.java

 package org.oauth;

 import oauth.signpost.OAuthConsumer;
 import oauth.signpost.OAuthProvider;
 import oauth.signpost.exception.OAuthCommunicationException;
 import oauth.signpost.exception.OAuthExpectationFailedException;
 import oauth.signpost.exception.OAuthMessageSignerException;
 import oauth.signpost.exception.OAuthNotAuthorizedException;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.AsyncTask;

 public class OAuthRequestTokenTask extends AsyncTask<Void, Void, Void> {

     private Context context;
     private OAuthConsumer consumer;
     private OAuthProvider provider;

     public OAuthRequestTokenTask(Context context, OAuthConsumer consumer,
             OAuthProvider provider) {
         super();
         this.context = context;
         this.consumer = consumer;
         this.provider = provider;
     }

     @Override
     protected Void doInBackground(Void... params) {
         try {
             System.out.println("请求Request Token之前" + consumer.getToken());
             //retrieveRequestToken的第二个参数是回调URL
             final String url = provider.retrieveRequestToken(consumer, Constants.OAUTH_CALLBACK_URL);
             System.out.println("请求Request Token之后" + consumer.getToken());
             System.out.println("url---->" + url);
             Uri uri = Uri.parse(url);
             //隐式的启动Activity
             //tel://21983129863
             //sms://767868698769
             //https://.......会启动浏览器
             Intent intent = new Intent(Intent.ACTION_VIEW, uri).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
                     | Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_FROM_BACKGROUND);
             context.startActivity(intent);
         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return null;
     }

 }

(4)RetrieveAccessTokenTask.java

 package org.oauth;

 import oauth.signpost.OAuth;
 import oauth.signpost.OAuthConsumer;
 import oauth.signpost.OAuthProvider;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.util.Log;

 public class RetrieveAccessTokenTask extends AsyncTask<Uri, Void, Void> {

     final String TAG = "OAuth";

     private Context    context;
     private OAuthProvider provider;
     private OAuthConsumer consumer;
     private SharedPreferences prefs;

     public RetrieveAccessTokenTask(Context context, OAuthConsumer consumer,OAuthProvider provider, SharedPreferences prefs) {
         this.context = context;
         this.consumer = consumer;
         this.provider = provider;
         this.prefs=prefs;
     }

     @Override
     protected Void doInBackground(Uri...params) {
         final Uri uri = params[0];

         final String oauth_verifier = uri.getQueryParameter(OAuth.OAUTH_VERIFIER);

         try {
             provider.retrieveAccessToken(consumer, oauth_verifier);//会访问ACCESS_URL

             final Editor edit = prefs.edit();
             edit.putString(OAuth.OAUTH_TOKEN, consumer.getToken());
             edit.putString(OAuth.OAUTH_TOKEN_SECRET, consumer.getTokenSecret());
             edit.commit();

             String token = prefs.getString(OAuth.OAUTH_TOKEN, "");
             String secret = prefs.getString(OAuth.OAUTH_TOKEN_SECRET, "");

             consumer.setTokenWithSecret(token, secret);
             context.startActivity(new Intent(context,MainActivity.class));

             Log.i(TAG, "OAuth - Access Token Retrieved");

         } catch (Exception e) {
             Log.e(TAG, "OAuth - Access Token Retrieval Error", e);
         }

         return null;
     }
 }

(5)Constants.java

 package org.oauth;

 public class Constants {

     //腾讯所分配的APP_KEY
     public static final String CONSUMER_KEY = "99e9494ff07e42489f4ace16b63e1f47";
     //腾讯所分配的APP_SECRET
     public static final String CONSUMER_SECRET = "154f6f9ab4c1cf527f8ad8ab1f8e1ec9";
     //用于获取未授权的request token
     public static final String REQUEST_URL = "https://open.t.qq.com/cgi-bin/request_token";
     //用于获取access token
     public static final String ACCESS_URL = "https://open.t.qq.com/cgi-bin/access_token";
     //用于对未授权的request token进行授权
     public static final String AUTHORIZE_URL = "https://open.t.qq.com/cgi-bin/authorize";

     public static final String ENCODING = "UTF-8";

     //Manifest设置PrepareRequestTokenActivity时也有设置此项
     public static final String OAUTH_CALLBACK_SCHEME = "x-oauthflow";
     public static final String OAUTH_CALLBACK_HOST = "callback";
     //回调地址
     public static final String OAUTH_CALLBACK_URL = OAUTH_CALLBACK_SCHEME + "://" + OAUTH_CALLBACK_HOST;

 }