我正在尝试按照this教程中的步骤在Android Studio中实现一个简单的地理围栏示例。我想要一个当用户输入/离开一些预定义区域时仅显示一些文本的应用程序（您可以在清单文件中看到以下代码）。但是，每次在模拟器上运行此应用程序时，都会收到应用程序名称不断停止的错误。我也在发布Logcat输出。
错误的原因是什么，我该如何解决？
谢谢。
MainActivity类
public class MainActivity extends Activity {
private static final long MINIMUM_DISTANCECHANGE_FOR_UPDATE = 1; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATE = 1000; // in Milliseconds
private static final long POINT_RADIUS = 100; // in Meters
private static final long PROX_ALERT_EXPIRATION = -1; // It will never expire
private static final String PROX_ALERT_INTENT = "com.example.user.proximityalert2.ProximityAlert";
private LocationManager locationManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
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) {
addProximityAlert();
} else {
Toast.makeText(this, "Permission not granted", Toast.LENGTH_LONG).show();
ActivityCompat.requestPermissions(this,new String[] { Manifest.permission.ACCESS_FINE_LOCATION}, 1);
addProximityAlert();
}
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//addProximityAlert();
}
@SuppressLint("MissingPermission")
private void addProximityAlert() {
double latitude = 40.4893;
double longitude = 50.2260;
Intent intent = new Intent(PROX_ALERT_INTENT);
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
locationManager.addProximityAlert(
latitude, // the latitude of the central point of the alert region
longitude, // the longitude of the central point of the alert region
POINT_RADIUS, // the radius of the central point of the alert region, in meters
PROX_ALERT_EXPIRATION, // time for this proximity alert, in milliseconds, or -1 to indicate no expiration
proximityIntent // will be used to generate an Intent to fire when entry to or exit from the alert region is detected
);
IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
registerReceiver(new ProximityIntentReceiver(), filter);
Toast.makeText(getApplicationContext(),"Alert Added",Toast.LENGTH_SHORT).show();
}
}
ProximityIntentReceiver类
public class ProximityIntentReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String key = LocationManager.KEY_PROXIMITY_ENTERING;
Boolean entering = intent.getBooleanExtra(key, false);
if (entering) {
//Log.d(getClass().getSimpleName(), "entering");
Toast.makeText(context, "You are entering XXX", Toast.LENGTH_SHORT).show();
}else {
//Log.d(getClass().getSimpleName(), "exiting");
Toast.makeText(context, "You are exiting XXX", Toast.LENGTH_SHORT).show();
}
}
}
清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.user.proximityalert2">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"
tools:ignore="MockLocation,ProtectedPermissions" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.VIBRATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
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>
<receiver android:name=".ProximityIntentReceiver"/>
</application>
</manifest>
Logcat输出
2019-02-24 16:38:38.740 8270-8270/com.example.user.proximityalert2 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.user.proximityalert2, PID: 8270
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.proximityalert2/com.example.user.proximityalert2.MainActivity}: java.lang.SecurityException: Geofence usage requires ACCESS_FINE_LOCATION permission
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.SecurityException: Geofence usage requires ACCESS_FINE_LOCATION permission
at android.os.Parcel.createException(Parcel.java:1942)
at android.os.Parcel.readException(Parcel.java:1910)
at android.os.Parcel.readException(Parcel.java:1860)
at android.location.ILocationManager$Stub$Proxy.requestGeofence(ILocationManager.java:814)
at android.location.LocationManager.addProximityAlert(LocationManager.java:1114)
at com.example.user.proximityalert2.MainActivity.addProximityAlert(MainActivity.java:46)
at com.example.user.proximityalert2.MainActivity.onCreate(MainActivity.java:32)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: android.os.RemoteException: Remote stack trace:
at com.android.server.LocationManagerService.checkResolutionLevelIsSufficientForGeofenceUse(LocationManagerService.java:1441)
at com.android.server.LocationManagerService.requestGeofence(LocationManagerService.java:2343)
at android.location.ILocationManager$Stub.onTransact(ILocationManager.java:120)
at android.os.Binder.execTransact(Binder.java:731)