Toast is not displayed with the GPS position

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Toast is not displayed with the GPS position

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#1 by (1 votes)
#2 by (0 votes)

1

I'm developing a very simple app, when the app runs it opens a TOAST with my GPS position. The app is running normally, but TOAST is not showing. What could be wrong?

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pixelayer.masterpoint" >

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

MainActivity.java

package com.teste.masterpoint;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.provider.Settings;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity implements LocationListener {

    private LocationManager locationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
                2000, 1, this);

    }

    @Override
    public void onLocationChanged(Location location) {

        String msg = "New Latitude: " + location.getLatitude() + "New Longitude: " + location.getLongitude();

        Toast.makeText(getBaseContext(), msg, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onProviderDisabled(String provider) {

        Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
        startActivity(intent);
        Toast.makeText(getBaseContext(), "Gps is turned off!! ",
                Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onProviderEnabled(String provider) {

        Toast.makeText(getBaseContext(), "Gps is turned on!! ",
                Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onStatusChanged(String provider, int status, Bundle extras) {
        // TODO Auto-generated method stub

    }

    @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);
    }
}

android

asked by anonymous 22.11.2015 / 15:36

2 answers

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score 1 · Answer 1

Toast is within the onLocationChanged() method, as its name indicates is only called when its location changes. (1)
As long as there is no such change, within the limits set to locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 1, this); , the method is not called.

Before this happens, you can, using the locationManager .getLastKnownLocation() method, get its last known location.

In method onCreate() include the following code:

if (locationManager != null) {
    Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    if (location != null) {
        String msg = "New Latitude: " + location.getLatitude() + "New Longitude: " + location.getLongitude();

        Toast.makeText(getBaseContext(), msg, Toast.LENGTH_LONG).show();
    }
}

Of course, this method will only be called if GPS is connected and with access to the satellites.

score 0 · Answer 2

Step 1 : Have you checked that onLocationChanged() is being called? Use Log to verify this:

Log.v("QualquerTAG", "Entrou no onLocationChanged() Latitude: "+location.getLatitude()+" | Longitude: "+location.getLongitude());

and make sure it's called on the console.

Step 2 : If the method is being called (step 1), it is probably not running on the Thread UI. Then try to call the Toast inside the UI Thread:

MainActivity.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(MainActivity.this, msg, Toast.LENGTH_LONG).show();
        }
    });

PS: I strongly advise against using getBaseContext() as the context of Toast . I recommend using MainActivity.this instead.

Step 3 : If nothing works, try adding these permissions and see if the issue is resolved:

<uses-permission android:name="android.permission.ACCESS_GPS" />
<uses-permission android:name="android.permission.ACCESS_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />