I have a classic example of Preferences where I want to call MainActivity
method to hide ImageView
.
But it does not go to debug even.
So how to call method of MainActivity
properly?
public class SettingsActivity extends AppCompatPreferenceActivity
...
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
try {
if (key.equals("isGPS_Switch")) {
Boolean isGPSSwitch = sharedPreferences.getBoolean(key, false);
if (isGPSSwitch) {
// START SERVICE
getActivity().startService(new Intent(getActivity(), gpsService.class));
((MainActivity)getActivity()).MyLocationMapDisplay(true);
} else {
// STOP SERVICE
getActivity().stopService(new Intent(getActivity(), gpsService.class));
((MainActivity)getActivity()).MyLocationMapDisplay(false);
}
}
} catch (Exception ex) {
Log.e("Preferences", ex.getMessage());
}
}
And MAinActivity class
public class MainActivity extends AppCompatActivity
...
private ImageView imageDisplayGPS;
public void MyLocationMapDisplay(boolean isDisplay)
{
if(isDisplay)
{
imageDisplayGPS.setVisibility(View.VISIBLE);
}
else
{
imageDisplayGPS.setVisibility(View.GONE);
}
}
Nothing could simple than using BroadcastReciver
private void configureBroadcastReciver() {
broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent i)
{
try
{
String imageDisplayGPSState = (String) i.getExtras().get("btn_imageDisplayGPS");
if(imageDisplayGPSState.equals("true"))
{
MyLocationMapDisplay(true);
}
else
{
MyLocationMapDisplay(false);
}
}
catch (Exception ex)
{
Log.d("MAIN ACTIVITY", ex.getMessage());
}
}
};
registerReceiver(broadcastReceiver, new IntentFilter("buttons_visible"));
}
And in the Preferences is
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
try {
if (key.equals("isGPS_Switch")) {
Boolean isGPSSwitch = sharedPreferences.getBoolean(key, false);
if (isGPSSwitch) {
// START SERVICE
getActivity().startService(new Intent(getActivity(), gpsService.class));
Intent buttons_visible = new Intent("buttons_visible");
buttons_visible.putExtra("btn_imageDisplayGPS", "true");
getContext().sendBroadcast(buttons_visible);
} else {
// STOP SERVICE
getActivity().stopService(new Intent(getActivity(), gpsService.class));
Intent buttons_visible = new Intent("buttons_visible");
buttons_visible.putExtra("btn_imageDisplayGPS", "false");
getContext().sendBroadcast(buttons_visible);
}
}
} catch (Exception ex) {
Log.e("Preferences", ex.getMessage());
}
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.