微信API自动登录流程
登录步骤[1]：
1. 申请APP KEY
在开放平台上注册应用即可获取。
2. 导入jar包
导入libammsdk.jar即可。
3. 添加权限
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 4. 创建WXEntryActivity类
- 在包名相应目录下新建一个wxapi目录，并在该wxapi目录下新增一个WXEntryActivity类，该类继承自Activity
- 在manifest文件里面加上exported属性，设置为true
- 实现IWXAPIEventHandler接口
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
setIntent(intent);
api.handleIntent(intent, this);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
System.out.println("onActivityResult");
}
@Override
public void onReq(BaseReq arg0) {
// TODO Auto-generated method stub
Toast.makeText(this, "onReq", Toast.LENGTH_SHORT).show();
System.out.println("onReq");
}
@Override
public void onResp(BaseResp arg0) {
// TODO Auto-generated method stub
Toast.makeText(this, "onResp", Toast.LENGTH_SHORT).show();
SendAuth.Resp authResp = (SendAuth.Resp) arg0;
System.out.println("onResp code:" + authResp.code);
StringBuilder sb = new StringBuilder();
sb.append("https://api.weixin.qq.com/sns/oauth2/access_token");
sb.append("?appid=");
sb.append(APP_ID);
sb.append("&secret=");
sb.append(SECRET);
sb.append("&code=");
sb.append(authResp.code);
sb.append("&grant_type=authorization_code");
String url = sb.toString();
Bundle bundle = new Bundle();
bundle.putString("url", url);
//新开一个activity，用Volley发送请求，用code换回access_token、refresh_token、expires_in和openid
Intent intent = new Intent(WXEntryActivity.this, WeixinActivity2.class);
intent.putExtras(bundle);
System.out.println("url:"+url);
startActivity(intent);
this.finish();
}注意：由于某种未知的原因，WXEntryActivity在执行onresp后会自行销毁并重新生成，然后重新执行onCreate方法。我的方法是在onCreate中加判断条件，并在一定条件下将activity自动销毁。
什么是refresh_token?
但是OAuth2.0为了增强安全性,access token的有效期被大大缩短,通常只有几个小时,也可以申请增加到几十天,但是总是会有过期的时候。为此,OAuth2.0增加了一个refresh token的概念,这个token并不能用于请求api.它是用来在access token过期后刷新access token的一个标记。[2]
什么是openid?
OpenID (OID) is an open standard and decentralized protocol by the non-profit OpenID Foundation that allows users to be authenticated by certain co-operating sites (known as Relying Parties or RP) using a third party service. This eliminates the need for webmasters to provide their own ad hoc systems and allowing users to consolidate their digital identities[3].
新的activity中的相关代码：
@Override
private void sendRequest(String url) {
// TODO Auto-generated method stub
System.out.println("Sending request");
JsonObjectRequest req = new JsonObjectRequest(url, null,
new Response.Listener() {
@Override
public void onResponse(JSONObject response) {
System.out.println("response:" + response.toString());
String artiwaresUrl = "http://www.artiwares.com:8080/account/social_account/";
HashMap map = new HashMap();
map.put("platform", "wechat");
try {
map.put("access_token",
response.getString("access_token"));
map.put("expires_in",
response.getString("expires_in"));
map.put("refresh_token",
response.getString("refresh_token"));
map.put("openid", response.getString("openid"));
System.out.println("JSONException:"
+ response.getString("access_token"));
System.out.println("expires_in:"
+ response.getString("expires_in"));
System.out.println("refresh_token:"
+ response.getString("refresh_token"));
System.out.println("openid:"
+ response.getString("openid"));
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
System.out
.println("JSONException:" + e1.toString());
}
JSONObject params = new JSONObject(map);
CookieRequest result = new CookieRequest(
Request.Method.POST, artiwaresUrl, params,
new Response.Listener() {
@Override
public void onResponse(JSONObject arg0) {
System.out.println("Login success!");
System.out.println("arg0:"
+ arg0.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(
VolleyError error) {
// error
System.out.println("VolleyError:"
+ error.toString());
}
});
mQueue.add(result);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
System.out.println("Error: " + error.getMessage());
}
});
System.out.println("url2:" + url);
mQueue.add(req);
} 实现 WeiboAuthListener 接口
class AuthListener implements WeiboAuthListener {
@Override
public void onComplete(Bundle values) {
mAccessToken = Oauth2AccessToken.parseAccessToken(values);
System.out.println("token:" + mAccessToken.getToken());
System.out.println("values:" + values.toString());
if (mAccessToken.isSessionValid()) {
Toast.makeText(WeiboActivity.this,
"weibosdk_demo_toast_auth_success", Toast.LENGTH_SHORT)
.show();
} else {
String code = values.getString("code");
String message = "weibosdk_demo_toast_auth_failed";
if (!TextUtils.isEmpty(code)) {
message = message + "\nObtained the code: " + code;
}
Toast.makeText(WeiboActivity.this, message, Toast.LENGTH_LONG)
.show();
}
}
@Override
public void onCancel() {
Toast.makeText(WeiboActivity.this,
"weibosdk_demo_toast_auth_canceled", Toast.LENGTH_LONG)
.show();
}
@Override
public void onWeiboException(WeiboException e) {
Toast.makeText(WeiboActivity.this,
"Auth exception : " + e.getMessage(), Toast.LENGTH_LONG)
.show();
}
}创建WXAPI:
IWXAPI api = WXAPIFactory.createWXAPI(this, APP_ID, false);
api.handleIntent(getIntent(), this);以上过程可在WXEntryActivity的onCreate方法中执行。注意：在发出请求之前需要先生成WXEntryActivity的实例，否则onResp方法不会被调用。
发送请求：
api = WXAPIFactory.createWXAPI(this, APP_ID, true);
api.registerApp(APP_ID);
final com.tencent.mm.sdk.modelmsg.SendAuth.Req req = new com.tencent.mm.sdk.modelmsg.SendAuth.Req();
req.scope = "snsapi_userinfo,snsapi_base";
req.state = "none";
Toast.makeText(this, "getToken()", Toast.LENGTH_SHORT).show();
api.sendReq(req);注意：req.scope = “snsapi_userinfo,snsapi_base”;只填任何一个都不行。