2017-03-01 13 views
1

我看着其他問題,但無法找到anwer。 無論如何,我試圖獲取設備的位置,它只是不會工作。我正在使用Android 5.0(API 21)。呼叫需要權限,可能會被用戶拒絕時,試圖獲取位置

public class MainActivity extends AppCompatActivity implements LocationListener { 

LocationManager locationManager; 
String provider; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
    provider = locationManager.getBestProvider(new Criteria(), false); 
    Location location = locationManager.getLastKnownLocation(provider); 
} 

@Override 
public void onLocationChanged(Location location) { 

} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 

} 

@Override 
public void onProviderEnabled(String provider) { 

} 

@Override 
public void onProviderDisabled(String provider) { 

} 
} 

錯誤是在.getLastKnowLocation()時發生。它說我應該檢查權限,但我已經將權限添加到Android清單。

uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> 

當我點擊紅色燈泡,有「添加權限檢查」選項,當我點擊它,它的廣告是:

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     // TODO: Consider calling 
     // ActivityCompat#requestPermissions 
     // here to request the missing permissions, and then overriding 
     // public void onRequestPermissionsResult(int requestCode, String[] permissions, 
     //           int[] grantResults) 
     // to handle the case where the user grants the permission. See the documentation 
     // for ActivityCompat#requestPermissions for more details. 
     return; 
    } 

但是當我運行它,它總是這樣回報; ,就像我沒有權限。

+0

檢查Android運行時權限 –

回答

1

您需要啓用運行時間權限,

ActivityCompat.requestPermissions(thisActivity, 
      new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION},1200); 
+0

如果未在創建中授予權限,請嘗試調用此權限。儘管運行時權限確實在Android 6.0(API級別23)中開始, – Remario

1

如果你只是想您的應用程序多達工作API等級21,你可以在模塊級build.gradle文件中設置targetSdkVersion 21,這將使錯誤你重新面臨消失。

如果/當您想要開始定位API級別23或更高級別時,除了在清單中聲明它們之外,還需要在運行時請求權限。