我正在构建一个应用程序，以在驾驶时尽量减少手机的使用。为此，我需要知道用户何时以一定速度行驶时，有人可以帮我吗？
我已经获得了设备的当前位置，但是我不知道如何更改它以获取速度
public class MainActivity extends AppCompatActivity {
//Constants
final int REQUEST_CODE = 123;
//time between location updates (1 seconds)
final long MIN_TIME = 1000;
//distance between location updates (10 meters)
final float MIN_DISTANCE = 10;
// GET location
String LOCATION_PROVIDER = LocationManager.GPS_PROVIDER;
//declare LOCATION MANAGER and LOCATION LISTENER
LocationManager mLocationManager;
LocationListener mLocationListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
///////////////////MAIN TOOGLE BUTTON/////////////////////
ToggleButton toggle = findViewById(R.id.mainbtn);
toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
Toast.makeText(getApplicationContext(),"FirstLine Running...", Toast.LENGTH_LONG).show();
} else {
// The toggle is disabled
}
}
});
//Linking elements to Java code
ImageButton cog_wheel = findViewById(R.id.cog_wheel);
//onClick listener
cog_wheel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(MainActivity.this, fl_settings.class);
startActivity(myIntent);
}
});
}
//On Resume
//@Override
@Override
protected void onPostResume() {
super.onPostResume();
Log.d("FL", "OnResume called");
Log.d("FT", "Get Current Location");
getCurrentLocation();
}
// getting the Current Location
private void getCurrentLocation() {
mLocationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
mLocationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.d("FL", "onLocationChanged() callback received");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
Log.d("FL", "onProviderDisabled() callback received");
}
};
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
ActivityCompat.requestPermissions(this,
new String [] {Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_CODE);
return;
}
mLocationManager.requestLocationUpdates(LOCATION_PROVIDER, MIN_TIME, MIN_DISTANCE, mLocationListener);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == REQUEST_CODE){
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
Log.d("FL","onPermissionResults(): Permission Granted!");
getCurrentLocation();
} else{
Log.d("FL","Permission denied =( ");
}
}
}
}