Android studio获取地图的最近已知位置，并使用微调器设置圆半径

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

LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);

LocationListener locationListener = new LocationListener() {
    @Override
    public void onLocationChanged(Location location) {
        // 获取最新的位置信息
        double latitude = location.getLatitude();
        double longitude = location.getLongitude();
        
        // 在这里进行地图操作或其他处理
    }
    
    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {}
    
    @Override
    public void onProviderEnabled(String provider) {}
    
    @Override
    public void onProviderDisabled(String provider) {}
};

SeekBar seekBar = findViewById(R.id.seekBar);
final TextView radiusTextView = findViewById(R.id.radiusTextView);

seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        // 获取微调器的进度值
        int radius = progress;
        
        // 更新显示圆半径的TextView
        radiusTextView.setText("圆半径：" + radius + "米");
        
        // 在地图上绘制圆，设置半径为radius
        // ...
    }
    
    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {}
    
    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {}
});