Kişilerin zillerini bulundukları yere göre susturacak bir uygulama yapıyorum. Bir PlacePicker API'sini kullanıyorum, sonra da bu yerin adını SharedPreferences'a kaydedin ve bir ListView'e ekleyin. Yine de öğeleri silmeyle ilgili problemlerim var. Kullanıcı bir liste görünümü öğesini uzun tıkladığında, SharedPreferences'dan silinmesi gerekir. Sorun, ilk silme işleminden sonra, Paylaşılan SharedPrefs öğesinin silinmesi yöntemim kötüdür ve çalışmaz. Bunu nasıl düzeltebilirim?Bu öğelerin Paylaşılan Başvurular'dan silinmesini nasıl sağlayabilirim?
public class MainActivity extends AppCompatActivity implements LocationListener {
PlacePicker.IntentBuilder builder;
int PLACE_PICKER_REQUEST;
ListView placeListView;
ArrayList<String> placeArrayList;
ArrayAdapter<String> arrayAdapter;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;
ArrayList<Double> latitudeList;
Integer counter;
LocationManager locationManager;
String provider;
double lat;
double lng;
Place place;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
placeListView = (ListView) findViewById(R.id.placeListView);
latitudeList = new ArrayList<>();
placeArrayList = new ArrayList<String>();
arrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, placeArrayList);
placeListView.setAdapter(arrayAdapter);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
provider = locationManager.getBestProvider(new Criteria(), false);
placeListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
new AlertDialog.Builder(MainActivity.this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setTitle("Are you sure?")
.setMessage("Do you want to delete this place?")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
placeArrayList.remove(position);
SharedPreferences sharedPreferences = MainActivity.this.getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
sharedPreferences.edit().remove("name" + position).apply();
arrayAdapter.notifyDataSetChanged();
}
})
.setNegativeButton("No", null)
.show();
return false;
}
});
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
Location location = locationManager.getLastKnownLocation(provider);
if (location != null){
lat = location.getLatitude();
lng = location.getLongitude();
Toast.makeText(getApplicationContext(), String.valueOf(lat) + String.valueOf(lng), Toast.LENGTH_LONG).show();
}else{
Toast.makeText(getApplicationContext(), "Unable to get location", Toast.LENGTH_LONG).show();
}
sharedPreferences = getSharedPreferences("myPrefs", Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
sharedPreferences.edit().putInt("counter", 0);
counter = sharedPreferences.getInt("counter", -1);
arrayAdapter.notifyDataSetChanged();
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
PLACE_PICKER_REQUEST = 1;
builder = new PlacePicker.IntentBuilder();
pickPlace();
}
});
}
public void pickPlace(){
try {
startActivityForResult(builder.build(this), PLACE_PICKER_REQUEST);
} catch (GooglePlayServicesRepairableException e) {
e.printStackTrace();
} catch (GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PLACE_PICKER_REQUEST) {
if (resultCode == RESULT_OK) {
place = PlacePicker.getPlace(data, this);
// String toastMsg = String.format("Place: %s", place.getName());
//Toast.makeText(this, toastMsg, Toast.LENGTH_LONG).show();
counter = sharedPreferences.getInt("counter", -1);
counter = counter + 1;
sharedPreferences.edit().putInt("counter", counter).apply();
LatLng latLng = place.getLatLng();
sharedPreferences.edit().putFloat("latitude" + String.valueOf(counter), (float) latLng.latitude).apply();
sharedPreferences.edit().putFloat("longitude" + String.valueOf(counter), (float) latLng.longitude).apply();
placeArrayList.add(place.getName().toString());
sharedPreferences.edit().putString("name" + placeArrayList.size(), place.getName().toString()).apply();
arrayAdapter.notifyDataSetChanged();
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onLocationChanged(Location location) {
for (int i = counter; i >= 0; i--){
if (lat >= sharedPreferences.getFloat("latitude" + String.valueOf(i), -1) - .005 &&
lat <= sharedPreferences.getFloat("latitude" + String.valueOf(i), -1) + .005 &&
lng >= sharedPreferences.getFloat("longitude" + String.valueOf(i), -1) - .005 &&
lng <= sharedPreferences.getFloat("longitude" + String.valueOf(i), -1) + .005){
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
audioManager.setStreamVolume(AudioManager.STREAM_RING, AudioManager.RINGER_MODE_SILENT, AudioManager.FLAG_SHOW_UI);
}
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
İhtiyacım olan SharedPreferences öğesine başvurmak için bunu nasıl kullanırım? Benim sorunum, bir öğe silindikten sonra, listview vardiyasındaki öğeler daha da aşağıya iner ve artık SharedPreferences'ta bunlara başvurmak için "position" kullanamam. Örneğin, üçüncü öğe silinirse, 4. yerine geçer. o zaman kullanıcı bunu silmek için çalıştığında, onlar 4 bir etiketi vardır çünkü konum 3 – felix
boş ver, çünkü şimdi anlıyorum. Teşekkürler! – felix
Çalıştığına sevindim :) –