下面我展示了我当前运行的代码，目前简单明了。
然而，我想实现一个在没有 GPS 连接时显示的 toast。
这是我项目的下一步，所以，没有它我真的无法继续前进。
我遵循了一些教程，但对于一个简单的 toast 来说，它们是徒劳的。
谁能给我一个简单的例子来解决这个小问题？
public class MainActivity extends Activity
{
TextView TxtLat;
TextView TxtLong;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TxtLat = (TextView) findViewById(R.id.TxtLat);
TxtLong = (TextView) findViewById(R.id.TxtLong);
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener ll = new myLocationListener();
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
}
class myLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location location)
{
if (location != null)
{
double pLong = location.getLongitude();
double pLat = location.getLatitude();
TxtLat.setText(Double.toString(pLat));
TxtLong.setText(Double.toString(pLong));
}
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
@Override
public void onProviderEnabled(String s) {
}
@Override
public void onProviderDisabled(String s) {
}
}
}
最佳答案
这样实现:
LocationManager locationManager = (LocationManager) youractivity.this.getSystemService(LOCATION_SERVICE);
if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
Toast toast = Toast.makeText(youractivity.this, "You can improve the accuracy of your location by turning on: GPS", Toast.LENGTH_SHORT);
toast.show();
}else if(!locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
Toast toast = Toast.makeText(youractivity.this, "You can improve the accuracy of your location by turning on: Wi-Fi", Toast.LENGTH_SHORT);
toast.show();
}else{
Toast toast = Toast.makeText(youractivity.this, "You can improve the accuracy of your location by turning on: GPS or Wi-Fi", Toast.LENGTH_SHORT);
toast.show();
}
并在您的manifest.xml 文件中添加以下权限
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
关于android - 如何在手机追踪器应用程序中实现简单的 "No Connection Toast ..."，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22557139/