問題描述

我正在嘗試為我的新導(dǎo)航應(yīng)用獲取用戶位置.我想經(jīng)常檢查用戶的位置，它必須是準確的.我使用示例中的以下代碼來獲取位置.

i am trying to get the users location for my new navigation app. i want to check the users location frequently and it has to be accurate . I use the following code from sample to get the location .

public class MainActivity extends Activity implements LocationListener {
private LocationManager locationManager;
private String provider;
private TextView a;
private TextView b;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    a = (TextView) findViewById(R.id.a);
    b = (TextView) findViewById(R.id.b);

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    provider = locationManager.getBestProvider(criteria, false);
    Location location = locationManager.getLastKnownLocation(provider);

    if (location != null) {
        System.out.println("Provider " + provider + " has been selected.");
        onLocationChanged(location);
    } else {
        a.setText("Location not available");
        b.setText("Location not available");
    }
}

@Override
protected void onResume() {
    super.onResume();
    locationManager.requestLocationUpdates(provider,0, 1, this);
}

@Override
protected void onPause() {
    super.onPause();
    locationManager.removeUpdates(this);
}

@Override
public void onLocationChanged(Location location) {
    Double lat =  location.getLatitude();
    Double lng =  location.getLongitude();
    a.setText(String.valueOf(lat));
    b.setText(String.valueOf(lng));
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

}

@Override
public void onProviderEnabled(String provider) {
    Toast.makeText(this, "Enabled new provider " + provider,
            Toast.LENGTH_SHORT).show();

}

@Override
public void onProviderDisabled(String provider) {
    Toast.makeText(this, "Disabled provider " + provider,
            Toast.LENGTH_SHORT).show();
}
}

但是當(dāng)我移動時，位置坐標并沒有更新，我總是得到一個恒定的值......有沒有更好的方法來獲取位置?根據(jù) android 文檔，我可以為此使用 Google Play 位置服務(wù)或 Android 平臺位置 API.我檢查了兩者的示例代碼，它實現(xiàn)了 LocationListener 接口來獲取用戶位置.那么它們之間的實際區(qū)別是什么?

But location cordinates are not updating as i move,i get a constant value always ... is there any better way to get location ? According to to android docs i can use Google Play Location Service or Android platform location APIs for this . I checked the sample code for both and it implements the LocationListener interface to get the user location .So whats the actual difference between them?

推薦答案

絕對使用新的 google play 定位服務(wù).他們在室內(nèi)的工作比舊的位置經(jīng)理好得多.我創(chuàng)建了一個使用新的 google play 位置服務(wù)并定期在后臺運行的示例.看看吧:

Absolutely use the new google play location services. They work much better indoors than the old location manager. I have created a sample that uses the new google play location services and works in the background periodically. Check it out:

https://github.com/nickfox/GpsTracker/tree/master/phoneClients/android

這篇關(guān)于查找位置:Google Play 位置服務(wù)或 Android 平臺位置 API的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！