使用 Location.getSpeed 时崩溃

Question

好像每次显示速度都崩溃，只要没有定位，需要打印“--”就好了！

public class MainActivity extends Activity implements LocationListener {


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

    LocationManager locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0,0,this);

    this.onLocationChanged(null);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}


@Override
public void onLocationChanged(Location location) {
    TextView textView = (TextView) findViewById(R.id.textView);
    if(location == null){textView.setText("--");}
else{textView.setText((int)location.getSpeed());}
}
}

Answer 1

使用

textView.setText(String.valueOf((int)location.getSpeed()));

因为当您将 int 传递给 TextView.SetText 时，它需要一个资源 ID

使用 Location.getSpeed 时崩溃

Crash when using Location.getSpeed

java

gps

android

location