<activityandroid:name="com.xxx.android.wxapi.WXEntryActivity"android:configChanges="keyboardHidden|orientation|screenSize"android:exported="true"android:launchMode="singleTop"android:screenOrientation="portrait"android:theme="@android:style/Theme.Translucent.NoTitleBar" ></activity>

public class WXEntryActivity extends Activity implements IWXAPIEventHandler {private IWXAPI api;private BaseResp resp = null;private String WX_APP_ID = "创建应用后得到的APP_ID";// 获取第一步的code后，请求以下链接获取access_tokenprivate String GetCodeRequest = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";// 获取用户个人信息private String GetUserInfo = "https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID";private String WX_APP_SECRET = "创建应用后得到的APP_SECRET";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);api = WXAPIFactory.createWXAPI(this, WX_APP_ID, false);api.handleIntent(getIntent(), this);}// 微信发送请求到第三方应用时，会回调到该方法
    @Overridepublic void onReq(BaseReq req) {finish();}// 第三方应用发送到微信的请求处理后的响应结果，会回调到该方法
    @Overridepublic void onResp(BaseResp resp) {String result = "";if (resp != null) {resp = resp;}switch (resp.errCode) {case BaseResp.ErrCode.ERR_OK:result = "发送成功";Toast.makeText(this, result, Toast.LENGTH_LONG).show();String code = ((SendAuth.Resp) resp).code;/** 将你前面得到的AppID、AppSecret、code，拼接成URL 获取access_token等等的信息(微信)*/String get_access_token = getCodeRequest(code);AsyncHttpClient client = new AsyncHttpClient();client.post(get_access_token, new JsonHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, JSONObject response) {// TODO Auto-generated method stub
                    super.onSuccess(statusCode, response);try {if (!response.equals("")) {String access_token = response.getString("access_token");String openid = response.getString("openid");String get_user_info_url = getUserInfo(access_token, openid);getUserInfo(get_user_info_url);}} catch (Exception e) {// TODO Auto-generated catch block
                        e.printStackTrace();}}});finish();break;case BaseResp.ErrCode.ERR_USER_CANCEL:result = "发送取消";Toast.makeText(this, result, Toast.LENGTH_LONG).show();finish();break;case BaseResp.ErrCode.ERR_AUTH_DENIED:result = "发送被拒绝";Toast.makeText(this, result, Toast.LENGTH_LONG).show();finish();break;default:result = "发送返回";Toast.makeText(this, result, Toast.LENGTH_LONG).show();finish();break;}}/*** 通过拼接的用户信息url获取用户信息* * @param user_info_url*/private void getUserInfo(String user_info_url) {AsyncHttpClient client = new AsyncHttpClient();client.get(user_info_url, new JsonHttpResponseHandler() {@Overridepublic void onSuccess(int statusCode, JSONObject response) {// TODO Auto-generated method stub
                super.onSuccess(statusCode, response);try {System.out.println("获取用户信息:" + response);if (!response.equals("")) {String openid = response.getString("openid");String nickname = response.getString("nickname");String headimgurl = response.getString("headimgurl");}} catch (Exception e) {// TODO Auto-generated catch block
                    e.printStackTrace();}}});}@Overrideprotected void onNewIntent(Intent intent) {super.onNewIntent(intent);setIntent(intent);api.handleIntent(intent, this);finish();}/*** 获取access_token的URL（微信）* * @param code*            授权时，微信回调给的* @return URL*/private String getCodeRequest(String code) {String result = null;GetCodeRequest = GetCodeRequest.replace("APPID",urlEnodeUTF8(WX_APP_ID));GetCodeRequest = GetCodeRequest.replace("SECRET",urlEnodeUTF8(WX_APP_SECRET));GetCodeRequest = GetCodeRequest.replace("CODE", urlEnodeUTF8(code));result = GetCodeRequest;return result;}/*** 获取用户个人信息的URL（微信）* * @param access_token*            获取access_token时给的* @param openid*            获取access_token时给的* @return URL*/private String getUserInfo(String access_token, String openid) {String result = null;GetUserInfo = GetUserInfo.replace("ACCESS_TOKEN",urlEnodeUTF8(access_token));GetUserInfo = GetUserInfo.replace("OPENID", urlEnodeUTF8(openid));result = GetUserInfo;return result;}private String urlEnodeUTF8(String str) {String result = str;try {result = URLEncoder.encode(str, "UTF-8");} catch (Exception e) {e.printStackTrace();}return result;}}

public class LoginActivity extends Activity implements OnClickListener {private Button login;// 微信登录private static IWXAPI WXapi;private String WX_APP_ID = "创建应用后得到的APP_ID";@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stub// 启动activity时不自动弹出软键盘
        getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.login);init();}private void init() {login = (Button) findViewById(R.id.bt_login);login.setOnClickListener(this);}@Overridepublic void onClick(View v) {// TODO Auto-generated method stubswitch (v.getId()) {case R.id.login:WXLogin();break;default:break;}}/*** 登录微信*/private void WXLogin() {WXapi = WXAPIFactory.createWXAPI(this, WX_APP_ID, true);WXapi.registerApp(WX_APP_ID);SendAuth.Req req = new SendAuth.Req();req.scope = "snsapi_userinfo";req.state = "wechat_sdk_demo";WXapi.sendReq(req);}}