Android“gps需要ACCESS_FINE_LOCATION”错误，即使我的清单文件包含这个
每次我运行应用程序，我的SecurityException被抛出，debugging器的错误读取如下：
java.lang.SecurityException：“gps”位置提供程序需要ACCESS_COARSE_LOCATION或ACCESS_FINE_LOCATION权限。
这似乎是一个简单的错误，但是，我的清单文件是完全正确的。 在这里，这里是我的MapActivity代码：
<?xml version="1.0" encoding="utf-8"?> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="com.dev.cromer.jason.coverme.permission.MAPS_RECEIVE" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value= "@string/google_maps_key" /> <activity android:name=".MapActivity" android:label="@string/title_activity_map" > </activity> </application>
我的活动：
package com.dev.cromer.jason.coverme; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.support.v4.app.FragmentActivity; import android.os.Bundle; import android.util.Log; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.location.LocationServices; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.SupportMapFragment; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.MarkerOptions; public class MapActivity extends FragmentActivity implements LocationListener { private GoogleMap mMap; // Might be null if Google Play services APK is not available. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_map); setUpMapIfNeeded(); } @Override protected void onResume() { super.onResume(); setUpMapIfNeeded(); } private void setUpMapIfNeeded() { // Do a null check to confirm that we have not already instantiated the map. if (mMap == null) { // Try to obtain the map from the SupportMapFragment. mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)) .getMap(); // Check if we were successful in obtaining the map. if (mMap != null) { //mMap.setMyLocationEnabled(true); //mMap.setOnMyLocationChangeListener(this); setUpMap(); } } } private void setUpMap() { mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker")); mMap.setMyLocationEnabled(true); LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); try { Location myLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (myLocation != null) { Log.d("TAG", "Not null"); } else { Log.d("TAG", "NULL"); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); } } catch (SecurityException se) { Log.d("TAG", "SE CAUGHT"); se.printStackTrace(); } } @Override public void onLocationChanged(Location location) { Log.d("CHANGED", "LOCATION UPDATED"); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } }
ACCESS_COARSE_LOCATION ， ACCESS_FINE_LOCATION和WRITE_EXTERNAL_STORAGE都是Android 6.0运行时权限系统的一部分 。 除了像在清单中一样使用它们之外， 还必须在运行时（使用requestPermissions() ）从用户请求它们，并查看是否有它们（使用checkSelfPermission() ）。
短期内的一种解决方法是将targetSdkVersion降至23以下。
但是，最终，您将需要更新您的应用程序以使用运行时权限系统。
例如，这个活动有五个权限。 四是运行时权限，虽然它目前只处理三（我写在WRITE_EXTERNAL_STORAGE被添加到运行时权限名册之前）。
/*** Copyright (c) 2015 CommonsWare, LLC Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. From _The Busy Coder's Guide to Android Development_ https://commonsware.com/Android */ package com.commonsware.android.permmonger; import android.Manifest; import android.app.Activity; import android.content.pm.PackageManager; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { private static final String[] INITIAL_PERMS={ Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.READ_CONTACTS }; private static final String[] CAMERA_PERMS={ Manifest.permission.CAMERA }; private static final String[] CONTACTS_PERMS={ Manifest.permission.READ_CONTACTS }; private static final String[] LOCATION_PERMS={ Manifest.permission.ACCESS_FINE_LOCATION }; private static final int INITIAL_REQUEST=1337; private static final int CAMERA_REQUEST=INITIAL_REQUEST+1; private static final int CONTACTS_REQUEST=INITIAL_REQUEST+2; private static final int LOCATION_REQUEST=INITIAL_REQUEST+3; private TextView location; private TextView camera; private TextView internet; private TextView contacts; private TextView storage; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); location=(TextView)findViewById(R.id.location_value); camera=(TextView)findViewById(R.id.camera_value); internet=(TextView)findViewById(R.id.internet_value); contacts=(TextView)findViewById(R.id.contacts_value); storage=(TextView)findViewById(R.id.storage_value); if (!canAccessLocation() || !canAccessContacts()) { requestPermissions(INITIAL_PERMS, INITIAL_REQUEST); } } @Override protected void onResume() { super.onResume(); updateTable(); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.actions, menu); return(super.onCreateOptionsMenu(menu)); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch(item.getItemId()) { case R.id.camera: if (canAccessCamera()) { doCameraThing(); } else { requestPermissions(CAMERA_PERMS, CAMERA_REQUEST); } return(true); case R.id.contacts: if (canAccessContacts()) { doContactsThing(); } else { requestPermissions(CONTACTS_PERMS, CONTACTS_REQUEST); } return(true); case R.id.location: if (canAccessLocation()) { doLocationThing(); } else { requestPermissions(LOCATION_PERMS, LOCATION_REQUEST); } return(true); } return(super.onOptionsItemSelected(item)); } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { updateTable(); switch(requestCode) { case CAMERA_REQUEST: if (canAccessCamera()) { doCameraThing(); } else { bzzzt(); } break; case CONTACTS_REQUEST: if (canAccessContacts()) { doContactsThing(); } else { bzzzt(); } break; case LOCATION_REQUEST: if (canAccessLocation()) { doLocationThing(); } else { bzzzt(); } break; } } private void updateTable() { location.setText(String.valueOf(canAccessLocation())); camera.setText(String.valueOf(canAccessCamera())); internet.setText(String.valueOf(hasPermission(Manifest.permission.INTERNET))); contacts.setText(String.valueOf(canAccessContacts())); storage.setText(String.valueOf(hasPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE))); } private boolean canAccessLocation() { return(hasPermission(Manifest.permission.ACCESS_FINE_LOCATION)); } private boolean canAccessCamera() { return(hasPermission(Manifest.permission.CAMERA)); } private boolean canAccessContacts() { return(hasPermission(Manifest.permission.READ_CONTACTS)); } private boolean hasPermission(String perm) { return(PackageManager.PERMISSION_GRANTED==checkSelfPermission(perm)); } private void bzzzt() { Toast.makeText(this, R.string.toast_bzzzt, Toast.LENGTH_LONG).show(); } private void doCameraThing() { Toast.makeText(this, R.string.toast_camera, Toast.LENGTH_SHORT).show(); } private void doContactsThing() { Toast.makeText(this, R.string.toast_contacts, Toast.LENGTH_SHORT).show(); } private void doLocationThing() { Toast.makeText(this, R.string.toast_location, Toast.LENGTH_SHORT).show(); } }
（从这个示例项目 ）
对于requestPermissions（）函数，参数应该是“ACCESS_COARSE_LOCATION”吗？ 还是应该包含全名“android.permission.ACCESS_COARSE_LOCATION”？
我将使用在Manifest.permission定义的常量，如上所示。
另外，请求代码是什么？
这将作为onRequestPermissionsResult()的第一个parameter passing给你，所以你可以告诉一个requestPermissions()调用另一个。
我简单的解决scheme是这样的
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) { googleMap.setMyLocationEnabled(true); googleMap.getUiSettings().setMyLocationButtonEnabled(true); } else { Toast.makeText(this, R.string.error_permission_map, Toast.LENGTH_LONG).show(); }
或者你可以像这样打开权限对话框
} else { ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION }, TAG_CODE_PERMISSION_LOCATION); }
原因：“从Android 6.0（API级别23）开始，用户在应用程序运行时将权限授予应用程序，而不是在安装应用程序时授予。” 在这种情况下，“ACCESS_FINE_LOCATION”是一个“危险的权限，因此你得到这个”java.lang.SecurityException：“gps”位置提供者需要ACCESS_FINE_LOCATION权限。 错误（ https://developer.android.com/training/permissions/requesting.html ）。
解决scheme：实施https://developer.android.com/training/permissions/requesting.html中的“请求您所需的权限”和“处理权限请求响应”标题下的代码。;
