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這是我的第一個問題。我學習計算機科學,並試圖提高我在android開發方面的技能。所以我想製作一個簡單的天氣應用程序。我不習慣android 6.0的新權限系統,所以我需要你的幫助。新的權限系統(位置整合)
我總是有問題,日誌告訴我,沒有找到位置(我使用的字符串,如果位置爲空)。我這樣做,因爲我想要檢查是否有任何位置。之後,我想將緯度和高度傳遞給用於請求座標的天氣數據的API。請看看我的代碼,並試圖幫助我,給我一些建議,以提高代碼:
public class MainActivity extends AppCompatActivity implements LocationListener {
LocationManager locationManager;
Location location;
String provider;
String[] permissions = {Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//LocationManager Setup get System Services
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
provider = locationManager.getBestProvider(new Criteria(), false);
//Get Last known Location
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, permissions, 10);
} else {
locationManager.requestLocationUpdates(provider, 400, 1000, this);
location = locationManager.getLastKnownLocation(provider);
if (location != null) {
Log.i("Location Info", "Location Achieved");
} else {
Log.i("Location Info", "No Location found");
}
}
}
@Override
protected void onResume() {
super.onResume();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, permissions, 10);
return;
} else {
locationManager.requestLocationUpdates(provider, 400, 1000, this);
}
}
@Override
protected void onPause() {
super.onPause();
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, permissions, 10);
return;
} else {
locationManager.removeUpdates(this);
}
}
@Override
public void onLocationChanged(Location location) {
Double lat = location.getLatitude();
Double lng = location.getLongitude();
Log.i("Latitude", lat.toString());
Log.i("Longitude", lng.toString());
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
THX很多隊友。這有幫助。 – sagat
很高興幫助... –