onStatusChanged和onProviderDisabled上的Android LocationListener、AbstractMethodError

Question

我有一个带有按钮的简单活动，它使用LocationManager尝试获取当前位置：

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button buttonGps = findViewById(R.id.buttonGps);

    final Context activity = this;

    buttonGps.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (!checkForPhonePermission()) {
                return;
            }

            LocationManager locationManager = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);

            locationManager.requestSingleUpdate(LocationManager.GPS_PROVIDER, new LocationListener() {
                @Override
                public void onLocationChanged(@NonNull Location location) {
                    Log.d(TAG, location.getLatitude() + "");
                }
            }, Looper.myLooper());
        }
    });
}

java.lang.AbstractMethodError: abstract method "void android.location.LocationListener.onStatusChanged(java.lang.String, int, android.os.Bundle)"

java.lang.AbstractMethodError: abstract method "void android.location.LocationListener.onProviderDisabled(java.lang.String)"

这种行为有什么原因吗？

Answer 1

只需在代码末尾添加以下三个函数：

@Override
public void onProviderEnabled(@NonNull String provider) {

}

@Override
public void onProviderDisabled(@NonNull String provider) {

}

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

并编写您希望在状态更改时执行的代码