Android 微信登录

/1、首先你得到微信.开放平台申请开发权限：https://open.weixin.qq.com/

申请通过效果如下即可

2、其次，阅读开发文档：

https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419317851&token=5e2b1bed1e22d52b73509b9def8c200bf130fb3f&lang=zh_CN

3、接下来就是Android开发代码。分三步获取微信信息，用以登录

3/1常量类

public class Constants {// appidpublic static final String APP_ID = "wx1201a018fdcec6";public static final String SECRET = "fc866ba851439dead6a09a480de179";// 商户号public static final String MCH_ID = "15171351";/*** 微信开放平台和商户约定的支付密钥** 注意：不能hardcode在客户端，建议genSign这个过程由服务器端完成*/public static final String APP_KEY = "01b2e2bd220db0c3765609ebc9b59f";}

3/2起调微信登录

//微信登录private void wxlogin(){String  strState = getPackageName() + String.valueOf(System.currentTimeMillis());String SCOPE = "snsapi_userinfo";IWXAPI api;api = WXAPIFactory.createWXAPI(LiteActivity.this, Constants.APP_ID, false);api.registerApp(Constants.APP_ID);if (!api.isWXAppInstalled()) {Toast.makeText(LiteActivity.this,"请先安装微信客户端！",Toast.LENGTH_LONG).show();return;}final SendAuth.Req req = new SendAuth.Req();req.scope = SCOPE;req.state = strState;api.sendReq(req);}

3/3获取微信回调结果，微信开发必要activity

/*** 微信分享回调*/
public class WXEntryActivity extends Activity implements IWXAPIEventHandler {private IWXAPI wxAPI;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);wxAPI = WXAPIFactory.createWXAPI(this, Constants.APP_ID,true);wxAPI.registerApp(Constants.APP_ID);wxAPI.handleIntent(getIntent(), this);}@Overrideprotected void onNewIntent(Intent intent){super.onNewIntent(intent);wxAPI.handleIntent(getIntent(),this);Log.i("ansen","WXEntryActivity onNewIntent");}@Overridepublic void onReq(BaseReq arg0) {Log.i("ansen","WXEntryActivity onReq:"+arg0);}@Overridepublic void onResp(BaseResp resp){if(resp.getType()== ConstantsAPI.COMMAND_SENDMESSAGE_TO_WX){//分享Log.i("ansen","微信分享操作.....");}else if(resp.getType()==ConstantsAPI.COMMAND_SENDAUTH){//登陆SendAuth.Resp authResp = (SendAuth.Resp) resp;String code = authResp.code;TestObServernotice.getInstance().notifyObserver(111, 2, code);Log.i("ansen", "微信登录操作.....");}finish();}
}

配置微信activity

<activityandroid:name=".wxapi.WXEntryActivity"android:configChanges="orientation|keyboardHidden"android:exported="true"android:screenOrientation="portrait"android:windowSoftInputMode="stateHidden|adjustPan"/>

3/4 resp结果如下。

请求微信接口

public static final String wxlogurl = "https://api.weixin.qq.com/sns/userinfo";
public static final String wxlogurl2 = "https://api.weixin.qq.com/sns/oauth2/access_token";

3/5通过观察者模式，回到activity中，根据code获取token

请求如下：，这里是asyncHttp框架。你可以使用其他请求网络类

private void getUserInfo(final String access_token, final String openid) {String url = Url.wxlogurl2;RequestParams params = new RequestParams();params.put("appid", openid);params.put("secret", Constants.SECRET);params.put("code", access_token);params.put("grant_type", "authorization_code");more_loadDialog.setloadtext("登录中...");more_loadDialog.show();AsyncHttpClient client = new AsyncHttpClient();client.post(url, params, new TextHttpResponseHandler() {@Overridepublic void onFailure(int i, Header[] headers, String s, Throwable throwable) {more_loadDialog.dismiss();Toast.makeText(LiteActivity.this, "网络连接异常", Toast.LENGTH_SHORT).show();}@Overridepublic void onSuccess(int i, Header[] headers, String s) {try {more_loadDialog.dismiss();JSONObject object = new JSONObject(s);String at = object.getString("access_token");getUserInfoend(at,Constants.APP_ID);Log.i("lgq", "re==logtest=====" + s);} catch (JSONException e) {e.printStackTrace();}}});
}

结果如下

3/6根据token获取微信账号详情

请求如下

private void getUserInfoend(final String access_token, final String openid) {String url = Url.wxlogurl;RequestParams params = new RequestParams();params.put("openid", openid);params.put("access_token", access_token);more_loadDialog.setloadtext("登录中...");more_loadDialog.show();AsyncHttpClient client = new AsyncHttpClient();client.post(url, params, new TextHttpResponseHandler() {@Overridepublic void onFailure(int i, Header[] headers, String s, Throwable throwable) {more_loadDialog.dismiss();Toast.makeText(LiteActivity.this, "网络连接异常", Toast.LENGTH_SHORT).show();}@Overridepublic void onSuccess(int i, Header[] headers, String s) {try {more_loadDialog.dismiss();JSONObject object = new JSONObject(s);Log.i("lgq", "re==logtest=====" + s);} catch (JSONException e) {e.printStackTrace();}}});
}

结果如下：