Java Android WifiManager getScanResult投诉需要访问\u粗略\u位置或访问\u精细\u位置权限,尽管声明了权限
我正在开发一个用于检查Wifi点的应用程序 我在wifiManager.getScanResults()上收到错误“java.lang.SecurityException:需要访问\u粗略\u位置或访问\u精细\u位置权限才能获得扫描结果”,尽管我已经声明了这些权限 主要活动Java Android WifiManager getScanResult投诉需要访问\u粗略\u位置或访问\u精细\u位置权限,尽管声明了权限,java,android,android-wifi,wifimanager,Java,Android,Android Wifi,Wifimanager,我正在开发一个用于检查Wifi点的应用程序 我在wifiManager.getScanResults()上收到错误“java.lang.SecurityException:需要访问\u粗略\u位置或访问\u精细\u位置权限才能获得扫描结果”,尽管我已经声明了这些权限 主要活动 public class MainActivity extends AppCompatActivity { WifiManager wifiManager; String[] wifis; WifiReceiver wi
public class MainActivity extends AppCompatActivity {
WifiManager wifiManager;
String[] wifis;
WifiReceiver wifiReceiver;
ListView wifiListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wifiListView = (ListView) findViewById(R.id.wifi_list);
wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiReceiver = new WifiReceiver();
wifiManager.startScan();
}
protected void onPause() {
unregisterReceiver(wifiReceiver);
super.onPause();
}
protected void onResume() {
registerReceiver(wifiReceiver, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
super.onResume();
}
private class WifiReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
List<ScanResult> wifiScanList = wifiManager.getScanResults();
wifis = new String[wifiScanList.size()];
for (int i = 0; i < wifiScanList.size(); i++) {
wifis[i] = wifiScanList.get(i).toString();
}
wifiListView.setAdapter(new ArrayAdapter<>(getApplicationContext(), android.R.layout.simple_list_item_1, wifis));
}
}
public类MainActivity扩展了AppCompatActivity{
WifiManager WifiManager;
字符串[]wifis;
WifiReceiver WifiReceiver;
ListView-wifiListView;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
wifiListView=(ListView)findViewById(R.id.wifi\u列表);
wifiManager=(wifiManager)getSystemService(Context.WIFI_服务);
wifiReceiver=新的wifiReceiver();
wifiManager.startScan();
}
受保护的void onPause(){
未注册接收人(wifiReceiver);
super.onPause();
}
受保护的void onResume(){
registerReceiver(wifiReceiver,新的意向过滤器(WifiManager.SCAN\u RESULTS\u AVAILABLE\u ACTION));
super.onResume();
}
私有类WifiReceiver扩展了BroadcastReceiver{
@凌驾
公共void onReceive(上下文、意图){
List wifiScanList=wifiManager.getScanResults();
wifis=新字符串[wifiScanList.size()];
对于(int i=0;i
显示
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.sample">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
,但解决方案不适用,因为我已声明了权限
有人知道可能是什么问题吗?谢谢。在Android M中,每次开始使用之前,您都需要向用户请求PermissionModel中定义为危险的权限,例如:
private boolean mayRequestLocation() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
return true;
}
if (checkSelfPermission(ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
return true;
}
if (shouldShowRequestPermissionRationale(ACCESS_FINE_LOCATION)) {
Snackbar.make(mView, R.string.permission_rationale, Snackbar.LENGTH_INDEFINITE)
.setAction(android.R.string.ok, new View.OnClickListener() {
@Override
@TargetApi(Build.VERSION_CODES.M)
public void onClick(View v) {
requestPermissions(new String[]{ACCESS_FINE_LOCATION}, REQUEST_FINE_LOCATION);
}
});
} else {
requestPermissions(new String[]{ACCESS_FINE_LOCATION}, REQUEST_FINE_LOCATION);
}
return false;
}
并在运行时使用以下命令加载它:
loadPermissions(Manifest.permission.ACCESS_FINE_LOCATION,REQUEST_FINE_LOCATION);
要评估权限请求的结果,可以重写onRequestPermissionsResult方法:
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case REQUEST_FINE_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// The requested permission is granted.
}
else{
// The user disallowed the requested permission.
}
return;
}
}
ACCESS\u FINE\u LOCATION
或ACCESS\u rough\u LOCATION
是必需的。要获得有效的结果,您还必须打开GPS或获得PEERS\u MAC\u ADDRESS
权限,如Setting
:您应该打开GPS以获取WIFI接入点列表
但我不确定同行的MAC地址。如果你看(第957行):
如果添加权限,则(!canReadPeerMacAddresses&&!isActiveNetworkScorer&&!isLocationEnabled())可以绕过{
。我已经测试过了,但我无法通过使用权限和禁用位置来获取WIFI MAC列表。尝试重新启动IDE。尝试重新启动IDE,卸载应用程序,清理项目,构建项目,仍然是相同的错误hi@kevin0228ca,我不完全确定我所说的是否适用于您的问题。根据Android 6.0棉花糖(API 23)引入了一个新的运行时权限模型。如果您的应用程序针对Android 6.0,则必须使用新的权限模型。因此,我假设此新模型基于在运行时请求权限,这可能会解决您遇到的问题。Vogella为我们提供了一个链接,指向您是否已验证此权限和调用mContext.checkCallingOrSelfPermission(android.Manifest.permission.PEERS\u MAC\u ADDRESS)==PackageManager.permission\u grated
是否为真?如果为真,则调用enforceAccessPermission()可能会阻止访问
?没有。正如我所说,我已经添加了权限对等点\u MAC\u地址,但在未打开位置的情况下无法成功获取访问点列表。此外,我将我的应用程序设置为系统应用程序,但在未打开位置的情况下仍无法获取访问点列表。的代码强制执行AccessPermission()
如下所示:private void enforceAccessPermission(){mContext.enforceCallingOrSelfPermission(android.Manifest.permission.ACCESS_WIFI_STATE,“WifiService”);}
我在清单中有访问WIFI\u状态
权限。我只是想知道你是否可以在代码中验证这两个权限是否已经被授予。你可能已经请求了它们,但这并不意味着操作系统没有出问题拒绝授予它们。实际上没有。我没有调试Android代码elf。但只有我检查了它的来源。你是对的。也许操作系统或特定于供应商的操作系统可能会拒绝许可。现在我非常好奇如何在不打开位置的情况下获取接入点。我可以对手机做任何事:根目录、制作系统应用程序等。如果你有任何解决方案,请共享。Tnx
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case REQUEST_FINE_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// The requested permission is granted.
}
else{
// The user disallowed the requested permission.
}
return;
}
}
/**
* Return the results of the most recent access point scan, in the form of
* a list of {@link ScanResult} objects.
* @return the list of results
*/
public List<ScanResult> getScanResults(String callingPackage) {
enforceAccessPermission();
int userId = UserHandle.getCallingUserId();
int uid = Binder.getCallingUid();
boolean canReadPeerMacAddresses = checkPeersMacAddress();
boolean isActiveNetworkScorer =
NetworkScorerAppManager.isCallerActiveScorer(mContext, uid);
boolean hasInteractUsersFull = checkInteractAcrossUsersFull();
long ident = Binder.clearCallingIdentity();
try {
if (!canReadPeerMacAddresses && !isActiveNetworkScorer
&& !isLocationEnabled()) {
return new ArrayList<ScanResult>();
}
if (!canReadPeerMacAddresses && !isActiveNetworkScorer
&& !checkCallerCanAccessScanResults(callingPackage, uid)) {
return new ArrayList<ScanResult>();
}
if (mAppOps.noteOp(AppOpsManager.OP_WIFI_SCAN, uid, callingPackage)
!= AppOpsManager.MODE_ALLOWED) {
return new ArrayList<ScanResult>();
}
if (!isCurrentProfile(userId) && !hasInteractUsersFull) {
return new ArrayList<ScanResult>();
}
return mWifiStateMachine.syncGetScanResultsList();
} finally {
Binder.restoreCallingIdentity(ident);
}
}
/**
* Returns true if the caller holds PEERS_MAC_ADDRESS.
*/
private boolean checkPeersMacAddress() {
return mContext.checkCallingOrSelfPermission(
android.Manifest.permission.PEERS_MAC_ADDRESS) == PackageManager.PERMISSION_GRANTED;
}