java - wifiManager.getScanResults() 返回 0-6ren

java - wifiManager.getScanResults() 返回 0

转载作者：太空宇宙更新时间：2023-11-03 10:58:12

我想开发一个软件，在后台使用处理程序线程扫描可用的 wifi 网络。问题是当我使用 handler.postDelayed() 时，WifiManager.getScanResults() 在正常情况下同时返回 0。

这些是运行时权限:

@Override
protected void onResume() {
    super.onResume();
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
    {
        if(checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
        {
            requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 87);
        }
    }
}

还有我的处理程序:

handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                counter++;
                scanWifi();
                scannWifiInterval();
                if(counter==5){
                    sum/=5;
                    textView2.setText(Integer.toString(sum));
                }
            }
        },timeoutSecondGenerator());

和 scanWifi 方法:

private void scanWifi() {
        wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);

        if (!wifiManager.isWifiEnabled()) {
            Toast.makeText(this, "WiFi is disabled ... We need to enable it", Toast.LENGTH_LONG).show();
            wifiManager.setWifiEnabled(true);

        }
        arrayList.clear();
        registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
        wifiManager.startScan();

        Toast.makeText(this, "Scanning WiFi ...", Toast.LENGTH_SHORT).show();
    }

和BroadCastReciever:

BroadcastReceiver wifiReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {


                results = wifiManager.getScanResults();
                unregisterReceiver(this);



                for(int i=0;i<results.size();i++){

                }
                for (ScanResult scanResult : results) {
                    if (scanResult.SSID.equals(networkSSID)) {
                        sum+=scanResult.level;
                        textView.setText(Integer.toString(scanResult.level));

                    }


                }

            }
        }
    };

日志:

09-16 16:36:47.384 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.454 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.474 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.474 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:36:47.474 2536-2536/? E/ViewRootImpl: mStopped=false mHasWindowFocus=false mPausedForTransition=false
09-16 16:37:02.169 1478-1849/? E/WifiStateMachine: result: -1266999764, Moved BSSID: 80:2a:a8:9a:ea:da
09-16 16:37:02.269 2681-2692/? E/Auth: [GoogleAccountDataServiceImpl] getToken() -> NETWORK_ERROR. Account: <ELLIDED:905778253>, App: com.google.android.googlequicksearchbox, Service: oauth2:https://www.googleapis.com/auth/googlenow
    pez: Error when calling server.
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):279)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24)
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629))
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148)
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):254)
        at wwt.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3)
        at cgv.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):5)
        at android.os.Binder.transact(Binder.java:387)
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3)
        at android.os.Binder.execTransact(Binder.java:453)
     Caused by: javax.net.ssl.SSLHandshakeException: Connection closed by peer
        at com.google.android.gms.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
        at com.google.android.gms.org.conscrypt.NativeSsl.doHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.google.android.gms.org.conscrypt.ConscryptFileDescriptorSocket.startHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):15)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.verifyHostname(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.createSocket(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.android.okhttp.internal.http.SocketConnector.connectTls(SocketConnector.java:188)
        at com.android.okhttp.Connection.connect(Connection.java:1324)
        at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:1412)
        at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:131)
        at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:481)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:462)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:368)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:476)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:118)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:249)
        at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218)
        at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java)
        at yod.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):32)
        at imu.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):1)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):109)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24) 
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629)) 
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148) 
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):254) 
        at wwt.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3) 
        at cgv.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):5) 
        at android.os.Binder.transact(Binder.java:387) 
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3) 
        at android.os.Binder.execTransact(Binder.java:453) 
09-16 16:37:02.419 17764-17764/? E/Zygote: no v2
09-16 16:37:02.489 2681-17697/? E/Auth: [GoogleAccountDataServiceImpl] getToken() -> NETWORK_ERROR. Account: <ELLIDED:905778253>, App: com.google.android.googlequicksearchbox, Service: oauth2:https://www.googleapis.com/auth/googlenow
    pez: Error when calling server.
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):279)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24)
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629))
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148)
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):254)
        at wwt.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3)
        at cgv.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):5)
        at android.os.Binder.transact(Binder.java:387)
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3)
        at android.os.Binder.execTransact(Binder.java:453)
     Caused by: javax.net.ssl.SSLHandshakeException: Connection closed by peer
        at com.google.android.gms.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
        at com.google.android.gms.org.conscrypt.NativeSsl.doHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.google.android.gms.org.conscrypt.ConscryptFileDescriptorSocket.startHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):15)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.verifyHostname(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.createSocket(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.android.okhttp.internal.http.SocketConnector.connectTls(SocketConnector.java:188)
        at com.android.okhttp.Connection.connect(Connection.java:1324)
        at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:1412)
        at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:131)
        at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:481)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:462)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:368)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:476)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:118)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:249)
        at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218)
        at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java)
        at yod.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):32)
        at imu.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):1)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):109)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24) 
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629)) 
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148) 
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):254) 
        at wwt.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3) 
        at cgv.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):5) 
        at android.os.Binder.transact(Binder.java:387) 
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3) 
        at android.os.Binder.execTransact(Binder.java:453) 
09-16 16:37:02.499 2400-17412/? E/VelvetNetworkClient: Failed to get auth token
09-16 16:37:02.589 2400-17412/? E/UpdateGcmReg: Network error while trying to register for GCM updates
09-16 16:37:03.320 2681-4954/? E/Auth: [GoogleAccountDataServiceImpl] getToken() -> NETWORK_ERROR. Account: <ELLIDED:905778253>, App: com.google.android.instantapps.supervisor, Service: oauth2:https://www.googleapis.com/auth/playatoms
    pez: Error when calling server.
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):279)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24)
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629))
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13)
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148)
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16)
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33)
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69)
        at gjc.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):4)
        at gjb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at gjb.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at gja.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):1)
        at gkz.getAuthToken(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at android.accounts.AbstractAccountAuthenticator$Transport.getAuthToken(AbstractAccountAuthenticator.java:214)
        at android.accounts.IAccountAuthenticator$Stub.onTransact(IAccountAuthenticator.java:113)
        at android.os.Binder.transact(Binder.java:387)
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3)
        at android.os.Binder.execTransact(Binder.java:453)
     Caused by: javax.net.ssl.SSLHandshakeException: Connection closed by peer
        at com.google.android.gms.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
        at com.google.android.gms.org.conscrypt.NativeSsl.doHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.google.android.gms.org.conscrypt.ConscryptFileDescriptorSocket.startHandshake(:com.google.android.gms@13280016@13.2.80 (040304-211705629):15)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.verifyHostname(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at com.google.android.gms.common.net.SSLCertificateSocketFactory.createSocket(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8)
        at com.android.okhttp.internal.http.SocketConnector.connectTls(SocketConnector.java:188)
        at com.android.okhttp.Connection.connect(Connection.java:1324)
        at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:1412)
        at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:131)
        at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:481)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:462)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:368)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:476)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:118)
        at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:249)
        at com.android.okhttp.internal.huc.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218)
        at com.android.okhttp.internal.huc.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java)
        at yod.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):32)
        at imu.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):1)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6)
        at gnj.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2)
        at gnx.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):109)
        at gnx.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):24) 
        at gnx.b(:com.google.android.gms@13280016@13.2.80 (040304-211705629)) 
        at gmi.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):34) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):13) 
        at ift.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):148) 
        at iet.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):16) 
        at ieq.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):33) 
        at dhb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):69) 
        at gjc.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):4) 
        at gjb.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):2) 
        at gjb.c(:com.google.android.gms@13280016@13.2.80 (040304-211705629):6) 
        at gja.a(:com.google.android.gms@13280016@13.2.80 (040304-211705629):1) 
        at gkz.getAuthToken(:com.google.android.gms@13280016@13.2.80 (040304-211705629):8) 
        at android.accounts.AbstractAccountAuthenticator$Transport.getAuthToken(AbstractAccountAuthenticator.java:214) 
        at android.accounts.IAccountAuthenticator$Stub.onTransact(IAccountAuthenticator.java:113) 
        at android.os.Binder.transact(Binder.java:387) 
        at djf.onTransact(:com.google.android.gms@13280016@13.2.80 (040304-211705629):3) 
        at android.os.Binder.execTransact(Binder.java:453) 
09-16 16:37:03.350 17542-17787/? E/Isotope: UID: [10104]  PID: [17542] HygieneTask : GetArchiveDownload RPC failed
    eer: UNAUTHENTICATED
        at bai.b(PG:6)
        at baf.call(PG:9)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
        at bke.run(PG)
        at java.lang.Thread.run(Thread.java:818)
     Caused by: java.io.IOException: NetworkError
        at android.accounts.AccountManager.convertErrorToException(AccountManager.java:2138)
        at android.accounts.AccountManager.-wrap0(AccountManager.java)
        at android.accounts.AccountManager$AmsTask$Response.onError(AccountManager.java:1996)
        at android.accounts.IAccountManagerResponse$Stub.onTransact(IAccountManagerResponse.java:69)
        at android.os.Binder.execTransact(Binder.java:453)
09-16 16:37:03.350 17542-17789/? E/Isotope: UID: [10104]  PID: [17542] HygieneTaskService : Archive Prefetching failed
    eer: UNAUTHENTICATED
        at bai.b(PG:6)
        at baf.call(PG:9)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
        at bke.run(PG)
        at java.lang.Thread.run(Thread.java:818)
     Caused by: java.io.IOException: NetworkError
        at android.accounts.AccountManager.convertErrorToException(AccountManager.java:2138)
        at android.accounts.AccountManager.-wrap0(AccountManager.java)
        at android.accounts.AccountManager$AmsTask$Response.onError(AccountManager.java:1996)
        at android.accounts.IAccountManagerResponse$Stub.onTransact(IAccountManagerResponse.java:69)
        at android.os.Binder.execTransact(Binder.java:453)
09-16 16:37:03.370 2681-14277/? E/NetworkScheduler: Invalid component specified.
09-16 16:37:03.390 2681-14277/? E/NetworkScheduler: Invalid component specified.
09-16 16:37:03.420 1478-1632/? E/NativeLibraryHelper: Failed to load assets verifier: 0
09-16 16:37:03.700 1478-1632/? E/NativeLibraryHelper: Failed to load assets verifier: 0

继续扫描但什么也没发现

minSdkVersion 17targetSdkVersion 28

我在 samsung galaxy s9 上运行它

如果有人回答，我将不胜感激。

最佳答案

终于找到问题所在了。我刚刚将 targetSdkVersion 从 28 更改为 22，它成功了!我认为在某些 Android 设备上运行时权限不是答案，您还需要在 list 文件中设置它，而在 sdk 28 程序中只设置运行时权限。

关于java - wifiManager.getScanResults() 返回 0，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52353577/

文章推荐： c# - MVC 分层项目结构

文章推荐： c# - SharpDx 窗口调整大小

文章推荐： php - JOIN 只返回一个结果

java - wifiManager.getScanResult() 返回空值
我正在搜索可用的 wifi 网络扫描，但 getScanResults() 方法返回空列表。我包含了所需的所有权限: android.permission.ACCESS_COARSE_LOCATIO
Android WifiManager::getScanResults() 仍然返回空列表
作为 Android 编程的新手，我尝试使用 WifiManager 的 getScanResults() 方法获取 SSID 列表，但它仍然是空的，即使我已授予它 ACCESS_COARSE_LOC
android - 如何根据信号强度按升序对 getScanResults() 列表进行排序？
我按照下面的代码将扫描结果存储到列表中: List results = wifi.getScanResults(); sb = new StringBuilder();
java - Android6.0 WifiManager.getScanResults()
list的大小为0，是Android6.0中WifiManager.getScanResults()的返回值我已经给了他权限(ACCESS_FINE_LOCATION 和 ACCESS_COARSE_
android - 访问 wifi.getScanResults() 中的结果时发生崩溃
我正在尝试使用 getScanResults() 显示 WiFi 的扫描结果。但是，当引用 getScanResults 的信息时会发生崩溃。更详细一点，当添加两行代码时crash就发生了: if(r
java - Android Wifi getScanResult() 返回空列表
我想扫描周围的 WiFi 网络并显示它们，但是当我使用 WifiManager.getScanResult() 时，我得到一个空列表。我已经在 list 中请求了许可，并且我尝试使用运行时，但调试器
java - wifiManager.getScanResults() 返回 0
我想开发一个软件，在后台使用处理程序线程扫描可用的 wifi 网络。问题是当我使用 handler.postDelayed() 时，WifiManager.getScanResults() 在正常情况
android - getConnectionInfo() 和 getScanResults() 检测信号强度变化的区别
我正在尝试检测 wifi 连接中的信号强度变化。我对应该在 BroadcastReceiver 中使用哪种方法感到困惑。使用 getConnectionInfo() 和 getScanResults(
android - 来自 Android wifi.getScanResults() 的旧结果
在我的 Droid 2 上，wifi.getScanResults() 似乎会在短时间内返回旧值。这意味着当我在家时，wifi.getScanResults() 将显示我的家庭网络。如果我沿着几英里
Android WiFiManager.getScanResults() 不返回隐藏的 SSID 数据
我正在开发一个 Android 项目来扫描我们办公室的本地 WiFi 环境。简而言之，我们想要找到不属于那里的接入点。问题:Android 似乎没有返回有关具有隐藏 SSID 的接入点的信息。有谁知
安卓工作室 : getScanResults returns empty but permission is given
我正在尝试创建一个代码来返回可用的 Wi-Fi 网络。但我面临一个问题。 getScanResults 返回空值，尽管我已提供所有可能的网络权限。 public class MainActivity
android - WifiManager.getScanResults() 在 android 上返回空列表
是的，我确实查看了所有其他类似问题，但它们对我不起作用。我正在尝试获取我附近可用的 wifi 连接列表。我就是这样做的: public class WifiFunction { privat
android - WifiManager.getScanResults() - 说明(自动扫描、 sleep 等)
我想澄清一下 WifiManager.getScanResults() 的行为，即: 启用无线时 android 是否按固定时间间隔扫描接入点？可以查询/更改间隔吗？可以查询上次扫描的时间吗？有关讨论
java - Android Oreo，wifiManager.getScanResults() 在 Doze 中返回空列表
当设备进入打瞌睡模式时，我遇到了 wifiManager.getScanResults() 在 Oreo (API26) 上返回空列表的问题。在进入打瞌睡之前，以及在早期的 API 版本上，一切正常(
Android 6.0.1 - 权限问题 = wifiManager.getScanResults() 返回 0
permissionsList.add() 不起作用，但 MainActivity.this.requestPermissions() 可以正常工作。问题是它带来了一个对话框，询问用户是否允许位置权限
java - Android WifiManager getScanResult 提示需要 ACCESS_COARSE_LOCATION 或 ACCESS_FINE_LOCATION 权限，尽管已声明权限
我正在开发一个应用程序来检查 Wifi 热点。我在 wifiManager.getScanResults() 收到错误“java.lang.SecurityException:需要 ACCESS_C
android - 如果 GPS 关闭，WiFi getScanResults 返回一个空列表。 (安卓 6.0.1)
我试图在这个 gif 中解释问题基本上，此测试应用会收到“RSSI_CHANGED” Intent 并在屏幕上显示扫描结果。除非启用 GPS，否则扫描结果始终为空。我想我的问题是为什么？ To
Android 6.0 错误？有权限但 getScanResults() 在 Android 6.0 中仍然返回空列表
我已经在 android 6.0 版本 - Marshmallow 中申请了权限，但是在使用 getScanResults() 时它仍然返回空列表。 private boolean checkPer
Android Pie 和 WiFiManger.getScanResults() 返回空列表或 Android Oreo WiFiManger.startScan() 返回 false
考虑来自 https://developer.android.com/guide/topics/connectivity/wifi-scan#java 的原始示例: public class Main

太空宇宙

个人简介

我是一名优秀的程序员,十分优秀！

作者热门文章

滴滴打车优惠券免费领取

全站热门文章

首页

博学

6Ren·AI

商城

java - wifiManager.getScanResults() 返回 0