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permissionsList.add()不起作用,但MainActivity.this.requestPermissions()正常工作。问题是它带来一个对话框询问用户是否允许位置权限。Android 6.0.1 - 权限问题= wifiManager.getScanResults()返回0
为什么添加权限不起作用?
有没有办法避免对话框?
见我下面最少的代码:
public class MainActivity extends AppCompatActivity {
WifiManager wifiManager;
WifiBroadcastReceiver broadcastReceiver;
Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
List<String> permissionsList = new ArrayList<String>();
permissionsList.add(Manifest.permission.ACCESS_FINE_LOCATION);
permissionsList.add(Manifest.permission.ACCESS_COARSE_LOCATION);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if(checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
MainActivity.this.requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 100);
MainActivity.this.requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, 100);
}
}
Button scan = (Button) findViewById(R.id.scan);
wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
wifiManager.setWifiEnabled(true);
scan.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(wifiManager != null)
wifiManager.startScan();
}
});
broadcastReceiver = new WifiBroadcastReceiver();
// On attache le receiver au scan result
registerReceiver(broadcastReceiver, new IntentFilter(
WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
}
public class WifiBroadcastReceiver extends BroadcastReceiver {
private WifiManager wifiManager;
@Override
public void onReceive(Context context, Intent intent) {
wifiManager = ((MainActivity) context).getCurrentWifiManager();
List<ScanResult> listeScan = wifiManager.getScanResults();
}
}
public WifiManager getCurrentWifiManager() {
return wifiManager;
}
}
这里是manifest.xml中:
这被理解。这就是我在代码开始处添加权限的原因。这没有用。只有请求许可才有效。缺点是要求用户允许/拒绝权限的对话框。 – narb
据我所知,没有关于对话框的解决方法。 –
重新阅读你的观点,这只是请求和不加的选择。为什么会有添加方法?在我看来,当我使用相机安装应用程序时,它会在安装过程中询问我?位置特别?我将重新阅读文档。 – narb