当我在手机上测试我的应用程序时，它不起作用

Question

当我在Samsung Galaxy S6 SM-G920I上测试我的应用程序时，它不起作用。 Basaclly应用程序在那里，但不显示访问点信息。

我的大多数代码都在线上获得，但是我在beginnig处修改了结果给了ssid。现在它给出了ssid bssid rssi和时间戳

代码在这里找到 https://medium.com/@ssaurel/develop-a-wifi-scanner-android-application-daa3b77feb73

private WifiManager wifiManager;
private ListView listView;
private Button buttonScan;
private int size = 0;
private List<ScanResult> results;
private ArrayList<String> arrayList = new ArrayList<>();
private ArrayAdapter adapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    buttonScan = findViewById(R.id.scanBtn);
    buttonScan.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            scanWifi();
        }
    });

    listView = findViewById(R.id.wifiList);
    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);
    }

    adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, arrayList);
    listView.setAdapter(adapter);
    scanWifi();
}

private void scanWifi() {
    arrayList.clear();
    registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
    wifiManager.startScan();
    Toast.makeText(this, "Scanning WiFi ...", Toast.LENGTH_SHORT).show();
}

BroadcastReceiver wifiReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        results = wifiManager.getScanResults();
        unregisterReceiver(this);

        for (ScanResult scanResult : results) {
            arrayList.add(scanResult.SSID +scanResult.level +scanResult.BSSID+scanResult.timestamp+scanResult.capabilities);
            adapter.notifyDataSetChanged();
        }
    }
};

}

Mainfest

package="com.example.a0e2fa">

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.INTERNET" />



<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name="com.example.a0e2fa.WiFiScannerActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>