Android仿新浪微博oauth2.0授权界面实现代码(2)

** * 自定义授权界面，申请令牌 */public class OAuthActivity extends Activity { //保存数据信息 private SharedPreferences preferences; private static final String TAG = "OAuthActivity"; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.webview);  //获取只能被本程序读写的SharedPreferences对象  preferences = getSharedPreferences("OAuth2.0", Context.MODE_PRIVATE);  //WebView加载回调页  WebView webView = (WebView) findViewById(R.id.webView);  //管理WebView  WebSettings webSettings = webView.getSettings();  //启用JavaScript调用功能  webSettings.setJavaScriptEnabled(true);  //启用缩放网页功能  webSettings.setSupportZoom(true);  //获取焦点  webView.requestFocus();  //判断网络连接状态，无网络则去设置网络，有网则继续  String url = Constants.URL;  webView.loadUrl(url);  //WebViewClient主要帮助WebView处理各种通知、请求事件  WebViewClient client = new WebViewClient() {   /**    * 页面加载时会回调该方法，如果用户同意就会成功获取code    * 然后发送一个异步的post请求获取access_token    * 若成功获取access_token信息，则保存所有重要信息    * 并跳转到主界面    * @param view 显现界面视图    * @param url 加载网址    * @param favicon 网址的相关图标    */   @Override   public void onPageStarted(WebView view, String url, Bitmap favicon) {    if (url.startsWith(Constants.REDIRECT_URL)) {     String code = url.split("=")[1];     //设置请求参数     RequestParams params = new RequestParams();     params.put("client_id", Constants.CLIENT_ID);     params.put("client_secret", Constants.APP_SECRET);     params.put("grant_type", "authorization_code");     params.put("redirect_uri", Constants.REDIRECT_URL);     params.put("code", code);     //发送异步post请求access_token令牌，并保存的OAthu的     // client_id和client_secret和access_token等重要信息     WeiboRestClient.post("oauth2/access_token", params, new AsyncHttpResponseHandler() {      @Override      public void onSuccess(int i, Header[] headers, byte[] bytes) {       String data = new String(bytes);       try {        //服务器返回数据        JSONObject object = new JSONObject(data);        (preferences.edit()).clear();        saveData(object);        Toast.makeText(OAuthActivity.this, "登陆成功", Toast          .LENGTH_SHORT).show();        //进入微博主界面        Intent intent = new Intent(OAuthActivity.this,MainActivity.class);        startActivity(intent);        //关闭授权界面        OAuthActivity.this.finish();       } catch (JSONException e) {        e.printStackTrace();       } }      @Override      public void onFailure(int i, Header[] headers, byte[] bytes, Throwable throwable) {       Toast.makeText(OAuthActivity.this, "登陆失败", Toast.LENGTH_SHORT)         .show();       OAuthActivity.this.finish();      }});}}};  webView.setWebViewClient(client); } /**  * 使用SharedPreferences保存的OAthu的client_id和client_secret和access_token等重要信息  */ private void saveData(JSONObject object) {  try {   SharedPreferences.Editor editor = preferences.edit();   editor.putString("access_token", object.getString("access_token"));   editor.putString("remind_in", object.getString("remind_in"));   editor.putString("expires_in", object.getString("expires_in"));   editor.putString("uid", object.getString("uid"));   editor.putString("client_id", Constants.CLIENT_ID);   editor.putString("redirect_uri", Constants.REDIRECT_URL);   editor.putString("client_secret", Constants.APP_SECRET);   editor.apply();  } catch (JSONException e) {   e.printStackTrace();  } }}

public class WeiboRestClient { private static final String BASE_URL = "https://api.weibo.com/"; private static AsyncHttpClient client = new AsyncHttpClient(); public static void get(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {  client.get(getAbsoluteUrl(url), params, responseHandler); } public static void post(String url, RequestParams params, AsyncHttpResponseHandler responseHandler) {   client.post(getAbsoluteUrl(url), params, responseHandler); } private static String getAbsoluteUrl(String relativeUrl) {  return BASE_URL + relativeUrl; }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"> <WebView  android:id="@+id/webView"  android:layout_width="match_parent"  android:layout_height="match_parent"/></LinearLayout>