<activity       android:name=".wxapi.WXEntryActivity"       android:exported="true">//產(chǎn)生回調(diào)     </activity> 

private final String APP_ID= "wx108514397eea5f77";   private IWXAPI api;   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_wxentry);     api = WXAPIFactory.createWXAPI(this, APP_ID, false);     api.registerApp(APP_ID);     api.handleIntent(getIntent(), this);   }   @Override   public void onReq(BaseReq baseReq) {   }   @Override   public void onResp(BaseResp baseResp) {     switch (baseResp.errCode) {       case BaseResp.ErrCode.ERR_OK:         Toast.makeText(this, "分享成功", Toast.LENGTH_LONG).show();         break;       case BaseResp.ErrCode.ERR_USER_CANCEL:         Toast.makeText(this, "分享取消", Toast.LENGTH_LONG).show();         break;       case BaseResp.ErrCode.ERR_AUTH_DENIED:         Toast.makeText(this, "被拒絕", Toast.LENGTH_LONG).show();         break;       default:         Toast.makeText(this, "未知錯(cuò)誤", Toast.LENGTH_LONG).show();         break;     }     finish();   }

private void weiChat(int flag) {     if (!api.isWXAppInstalled()) {       return;     }     //創(chuàng)建一個(gè)WXWebPageObject對象，用于封裝要發(fā)送的Url     WXWebpageObject webpage = new WXWebpageObject();     webpage.webpageUrl = "http://www.baidu.com/";     //創(chuàng)建一個(gè)WXMediaMessage對象     WXMediaMessage msg = new WXMediaMessage(webpage);     msg.title = "測試";     msg.description = "ceshi ";     SendMessageToWX.Req req = new SendMessageToWX.Req();     req.transaction = String.valueOf(System.currentTimeMillis());//transaction字段用于唯一標(biāo)識一個(gè)請求，這個(gè)必須有，否則會(huì)出錯(cuò)     req.message = msg;     //表示發(fā)送給朋友圈 WXSceneTimeline 表示發(fā)送給朋友 WXSceneSession     req.scene = flag == 0 ? SendMessageToWX.Req.WXSceneSession : SendMessageToWX.Req.WXSceneTimeline;     api.sendReq(req);   }