使用第三方登录第一步,添加依赖:
compile 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+'
在mainfest文件中添加权限:
在Android6.0以上需动态申请
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
注册微信 :
在全局Application类MyApplication中注册微信,在oncreate()方法中调用registerToWX()注册微信
public static IWXAPI mWXapi;
public String WX_APP_ID = "你的appid";
private void registerToWX() {
mWXapi = WXAPIFactory.createWXAPI(context, WX_APP_ID, false);
mWXapi.registerApp(WX_APP_ID);
}
在点击微信登录的方法中调用以下方法wxLogin():
//微信登录页
private void wxLogin() {
if (!AppApplication.mWXapi.isWXAppInstalled()) {
showMessage("您还未安装微信客户端");
return;
}
final SendAuth.Req req = new SendAuth.Req();
req.scope = "snsapi_userinfo";
req.state = "ufile_wx_login";//这个字段可以任意更改
AppApplication.mWXapi.sendReq(req);
}
在自己项目的包名下创建一个package,取名叫wxapi,并在该包下创建一个类名为WXEntryActivity的类。
public class WXEntryActivity extends Activity implements IWXAPIEventHandler {
private static final String WX_APP_ID = "你的APPID";
private static final String WX_APP_SECRET = "你的APPSECRET";
public static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
private static final String TAG = "WXEntryActivityLog";
public static String wxCode;
// private HttpWxLogin httpWxLogin;
public static String openid;
public static String accessToken;
public static String nickname;
public static String headImgUrl;
public static String unionId;
private Dialog mDialog;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// mDialog=WebDialogUtils.createWebDialog(this,"登录中");
//判断是否已经注册到微信
AppApplication.mWXapi.handleIntent(getIntent(), this);
}
// 微信发送请求到第三方应用时,会回调到该方法
@Override
public void onReq(BaseReq baseReq) {
}
// 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
//app发送消息给微信,处理返回消息的回调
@Override
public void onResp(BaseResp baseResp) {
Log.d(TAG, "onResp: " + baseResp.errStr);
Log.d(TAG, "onResp: 错误码" + baseResp.errCode);
//ERR_OK = 0(用户同意) ERR_AUTH_DENIED = -4(用户拒绝授权) ERR_USER_CANCEL = -2(用户取消)
switch (baseResp.errCode) {
case BaseResp.ErrCode.ERR_AUTH_DENIED:
Toast.makeText(this, "用户拒绝授权登录", Toast.LENGTH_SHORT).show();
// mDialog.dismiss();
finish();
break;
case BaseResp.ErrCode.ERR_USER_CANCEL:
Toast.makeText(this, "用户取消授权登录", Toast.LENGTH_SHORT).show();
// mDialog.dismiss();
finish();
break;
case BaseResp.ErrCode.ERR_OK:
//用户同意授权。
final String code = ((SendAuth.Resp) baseResp).code;
wxCode =code;
Log.d(TAG, "code: " + code);
finish();
break;
}
}
//获取access_token
private void getAccessToken(final String code) {
//这个接口需用get请求
String path = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + WX_APP_ID + "&secret="
+ WX_APP_SECRET + "&code=" + code + "&grant_type=authorization_code";
OkHttpClient client = new OkHttpClient();
final Request request = new Request.Builder()
.url(path)
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d(TAG, "onFailure: 失败");
// mDialog.dismiss();
finish();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
final String result = response.body().string();
Log.d(TAG, "请求微信服务器成功: " + result);
try {
JSONObject jsonObject = new JSONObject(result);
openid = jsonObject.getString("openid");
accessToken = jsonObject.getString("access_token");
} catch (JSONException e) {
e.printStackTrace();
}
getUserInfo();
}
});
}
//获取用户信息
private void getUserInfo() {
String path = "https://api.weixin.qq.com/sns/userinfo?access_token=" + accessToken + "&openid=" + openid;
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url(path)
.build();
Call call = client.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d(TAG, "onFailure: userinfo" + e.getMessage());
finish();
}
@Override
public void onResponse(Call call, Response response) throws IOException {
// Log.d(TAG, "onResponse: userinfo" + response.body().string()); //okhttp中 response.body().string()只允许调用一次
final String result = response.body().string();
try {
JSONObject jsonObject = new JSONObject(result);
unionId = jsonObject.getString("unionid");
headImgUrl = jsonObject.getString("headimgurl");
nickname = jsonObject.getString("nickname");
Log.d(TAG,"getUserInfo: unionId = "+unionId+" headImgUrl = "+ headImgUrl + " nickname = "+ nickname);
} catch (JSONException e) {
e.printStackTrace();
}
finish();
}
});
}
}
到这里已经可以成功获取接入微信登录所需要的所有信息了,我这边的话后端封装好了,只需要传入微信返回的code给后端,然后可以直接从后端返回微信用户的个人信息,所以我这里的getAccessToken()和getUserInfo()这两个方法是没有调用的。这里需要注意的是,微信返回的code只能使用一次。
其实这些都是可以根据微信的文档接的,不过有时候官方文档是真的烂,这里算是给新手一个小实例吧。