permissionsList.add()不起作用，但MainActivity.this.requestPermissions()正常工作。問題是它帶來一個對話框詢問用戶是否允許位置權限。Android 6.0.1 - 權限問題= wifiManager.getScanResults()返回0

為什么添加權限不起作用？

有沒有辦法避免對話框？

見我下面最少的代碼：

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 permissionsList = new ArrayList();

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 listeScan = wifiManager.getScanResults();

}

}

public WifiManager getCurrentWifiManager() {

return wifiManager;

}

}

這里是manifest.xml中：

2016-10-18

narb

總結

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