samples-flatfoot/codelabs/lifecycle/app/src/main/java/com/example/android/lifecycles/step4_solution/LocationActivity.java

/*
 * Copyright 2017, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.lifecycles.step4_solution;

import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.widget.TextView;
import android.widget.Toast;

import android.arch.lifecycle.LifecycleActivity;
import com.example.android.codelabs.lifecycle.R;

public class LocationActivity extends LifecycleActivity {

    private static final int REQUEST_LOCATION_PERMISSION_CODE = 1;

    private LocationListener mGpsListener = new MyLocationListener();

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED
                && grantResults[1] == PackageManager.PERMISSION_GRANTED) {
            bindLocationListener();
        } else {
            Toast.makeText(this, "This sample requires Location access", Toast.LENGTH_LONG).show();
        }
    }

    private void bindLocationListener() {
        BoundLocationManager.bindLocationListenerIn(this, mGpsListener, getApplicationContext());
    }

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

        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,
                    new String[]{Manifest.permission.ACCESS_FINE_LOCATION,
                            Manifest.permission.ACCESS_COARSE_LOCATION},
                    REQUEST_LOCATION_PERMISSION_CODE);
        } else {
            bindLocationListener();
        }
    }

    private class MyLocationListener implements LocationListener {
        @Override
        public void onLocationChanged(Location location) {
            TextView textView = (TextView) findViewById(R.id.location);
            textView.setText(location.getLatitude() + ", " + location.getLongitude());
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras) {
        }

        @Override
        public void onProviderEnabled(String provider) {
            Toast.makeText(LocationActivity.this,
                    "Provider enabled: " + provider, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onProviderDisabled(String provider) {
        }
    }
}