Android微信登录

Android微信登录

微信登录
微信登录比较简单，首先在Android Studio的build.gradle中添加相关依赖，如下所示：

implementation 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'
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在你的包名相应目录下新建一个wxapi目录，然后创建WXEntryActivity类，让它直接继承IWXAPIEventHandler
新建工具类，记录对应的AppID和AppSecret,如下所示，同时在AndroidManifest.xml中配置相关权限:
public static final String App_ID="XXXXXXX";
public static final String AppSecret="XXXXXXXXX";
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<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
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重写onReq和onResp方法，因为实现IWXAPIEventHandler接口，微信发送的请求将回调到onReq方法，发送到微信请求的响应结果将回调到onResp方法，所以我们在onResp中针对不同情况进行处理
吊起微信登录，获取相应的授权，从而获取微信个人信息
完整代码如下,可直接复制：
WXEntryActivity类
public class WXEntryActivity extends AppCompatActivity implements IWXAPIEventHandler {
private IWXAPI iwxapi;
public static String CODE;
public static boolean isOK = false;
private String openid,access;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_wxentry);
iwxapi = WXAPIFactory.createWXAPI(this, Utils.App_ID, true);
iwxapi.handleIntent(getIntent(), this);

}

@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
iwxapi.handleIntent(intent,this);
}

@Override
public void onReq(BaseReq baseReq) {

}

@Override
public void onResp(BaseResp baseResp) {
switch (baseResp.errCode) {
case BaseResp.ErrCode.ERR_OK:
SendAuth.Resp sendResp= (SendAuth.Resp) baseResp;
CODE=sendResp.code;
getAccessToken(CODE);
isOK=true;
// WXEntryActivity.this.finish();
break;
case BaseResp.ErrCode.ERR_AUTH_DENIED:
Toast.makeText(WXEntryActivity.this,"用户拒绝授权",Toast.LENGTH_SHORT).show();
isOK=false;
WXEntryActivity.this.finish();
break;
case BaseResp.ErrCode.ERR_USER_CANCEL:
Toast.makeText(this, "用户取消授权", Toast.LENGTH_SHORT).show();
WXEntryActivity.this.finish();
break;
default:
isOK=false;
WXEntryActivity.this.finish();
break;
}
}

private void getAccessToken(String code) {
//获取授权
String path="https://api.weixin.qq.com/sns/oauth2/access_token?appid="+Utils.App_ID+"&secret="+Utils.AppSecret+"&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) {
}

@Override
public void onResponse(Call call, Response response) throws IOException {
final String result=response.body().string();
try {
JSONObject jsonObject=new JSONObject(result);
openid=jsonObject.getString("openid");
access=jsonObject.getString("access_token");
Log.d("-----------", openid);
} catch (JSONException e) {
e.printStackTrace();
}
//获取个人信息
String getUserInfo="https://api.weixin.qq.com/sns/userinfo?access_token=" + access + "&openid=" + openid;
OkHttpClient client1=new OkHttpClient();
final Request request1=new Request.Builder()
.url(getUserInfo)
.build();
Call info=client1.newCall(request1);
info.enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Toast.makeText(getApplicationContext(),"登陆失败",Toast.LENGTH_SHORT).show();
finish();
}

@Override
public void onResponse(Call call, Response response) throws IOException {
String nickName=null;
String sex=null;
String province=null;
String country=null;
String city=null;
String avatarUrl=null;
final String result=response.body().string();
try {
//解析出微信的常用信息，如性别，昵称，省市区等
JSONObject jsonObject=new JSONObject(result);
nickName=jsonObject.getString("nickname");
sex=jsonObject.getString("sex");
city=jsonObject.getString("city");
province=jsonObject.getString("province");
country=jsonObject.getString("country");
avatarUrl=jsonObject.getString("headimgurl");
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
});
}
}