我正在开发我的第一个应用程序,它是一个非常简单的应用程序。单击按钮将经度/纬度发送到服务器/数据库。我正在使用Google Play服务进行定位,而我正在使用Nexus 9平板电脑进行测试。 我发现使用设置>位置(在Nexus 9上) - 高精度&低精度工作正常。数据正确并发送到服务器。但是当选择“仅设备”(GPS)时,它找不到长/纬。我得到了祝酒词:
uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"
我还是新手,所以我不确定我哪里出错了。我确实有清单文件w /
System.out.println("Longitude (function name)" + longitude + " and Latitude: " + latitude);
我的Gradle文件中的Google Play服务。因为它无论如何都可以使用WiFi。
我也放了
public class MainActivity extends Activity implements ConnectionCallbacks,
OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private Button btnNewShowLocation;
private double longitude;
private double latitude;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (checkPlayServices()) {
buildGoogleApiClient();
//**UPDATED**
createLocationRequest()
}
btnNewShowLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mLastLocation != null) {
postDataToServer("web site address- EDIT");
} else {
Toast.makeText(MainActivity.this, "Network isn't available", Toast.LENGTH_LONG).show();
}}});}
// **UPDATED**
protected void createLocationRequest() {
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FATEST_INTERVAL)
.setSmallestDisplacement(DISPLACEMENT);
private void postDataToServer(String uri) {
RequestPackage p = new RequestPackage();
p.setMethod("POST");
p.setUri(uri);
p.setParam("longitude", String.valueOf(longitude));
p.setParam("latitude", String.valueOf(latitude));
MyTask task = new MyTask();
task.execute(p);
System.out.println("Longitude (post data to server)" + longitude + " and Latitude: " + latitude);
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode)) {
GooglePlayServicesUtil.getErrorDialog(resultCode, this,
PLAY_SERVICES_RESOLUTION_REQUEST).show();
} else {
Toast.makeText(getApplicationContext(),
"This device is not supported.", Toast.LENGTH_LONG)
.show();
finish();
}
return false;
}
return true;
}
@Override
public void onConnected(Bundle arg0) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
System.out.println("Longitude (on Connected): " + longitude + " and Latitude: " + latitude);
if (mLastLocation != null) {
latitude = mLastLocation.getLatitude();
longitude = mLastLocation.getLongitude();
} else {
Toast.makeText(getApplicationContext(), "Searching for your location... \nMake sure WiFi or GPS is turned On", Toast.LENGTH_LONG).show();
}}}
在日志中查看Long / Lat被选中时(仅当点击按钮时,否则它为0.0)在我的上一次测试中,我使用了High Accuracy并获得了Long / Lat。关闭Wifi并更改位置,它正在接收我的新位置(但由于没有互联网连接,因此无法发送数据)。所以我很困惑,因为GPS不能以高精度获取我的新位置?
不确定这是否重要,但我希望设备仅适用于位置以及高精度。 任何帮助将不胜感激!这是我的代码(缩短,如果我遗漏任何东西请告诉我添加!)谢谢!
I/System.out﹕ Longitude (on Connected): 0.0 and Latitude: 0.0
I/System.out﹕ Longitude (post data to server)-88.7777777 and Latitude: 55.7777777
W/System.err﹕ java.net.UnknownHostException: Unable to resolve host
以下是高精度打开和Wifi关闭的日志备注。
ArrayAdapter
Wifi关闭了最后一行。
答案 0 :(得分:1)
您需要创建LocationRequest
对象并执行以下操作:
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(interval)
.setFastestInterval(fastestInterval)
.setSmallestDisplacement(minDisplacement);
有关详细信息,您可以尝试我的代码here。