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我想獲得GPS位置值。我寫了code.But我沒有顯示消息。我已經在deveice進行了測試,不是emulator.Device包含GPS &其啓用。 &也沒有互聯網連接。Android GPS位置 - 它不會去onLocationChanged
請告訴我什麼是錯在我的代碼
public class AndroidGPSSampleActivity extends Activity {
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000; // in Milliseconds
protected LocationManager locationManager;
protected Button retrieveLocationButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
retrieveLocationButton = (Button) findViewById(R.id.retrieve_location_button);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES,
new MyLocationListener()
);
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new MyLocationListener());
retrieveLocationButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
showCurrentLocation();
}
});
}
protected void showCurrentLocation() {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
String message = String.format(
"Current Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, "Sample test",
Toast.LENGTH_LONG).show();
Toast.makeText(AndroidGPSSampleActivity.this, message,
Toast.LENGTH_LONG).show();
}
}
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(AndroidGPSSampleActivity.this, message, Toast.LENGTH_LONG).show();
}
public void onStatusChanged(String s, int i, Bundle b) {
Toast.makeText(AndroidGPSSampleActivity.this, "Provider status changed",Toast.LENGTH_LONG).show();
}
public void onProviderDisabled(String s) {
Toast.makeText(AndroidGPSSampleActivity.this,"Provider disabled by the user. GPS turned off",Toast.LENGTH_LONG).show();
}
public void onProviderEnabled(String s) {
System.out.println("==onProviderEnabled=" + s);
Toast.makeText(AndroidGPSSampleActivity.this, "Provider enabled by the user. GPS turned on",Toast.LENGTH_LONG).show();
}
}
和權限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
總是Location
給空值。它沒有去onLocationChanged
方法...
請幫我從這個問題...
您使用模擬地點進行測試,不ü?如果是這樣,我不知道我可以幫助你,因爲我對模擬數據瞭解不多。你有沒有在真實的設備上測試? – 2012-02-13 08:57:54