Android Application keeps stopping as I requested location

Question

I am new to Android Studio, I know that, it cannot be an excuse but I need your help

I added two request statements in Manifest

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.escaper.lehome">

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

On my activity java file I have location manager, I am trying to get Latitude and Longitude and pass them to TextView.

package com.example.escaper.lehome;

import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationManager;
import android.provider.Settings;
import android.support.design.widget.NavigationView;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.location.LocationServices;

import org.w3c.dom.Text;

public class Main2Activity extends AppCompatActivity {

    LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    Location location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        if (location != null) {
            Double latitude = location.getLatitude();
            Double longitude = location.getLongitude();
            // We have location data
            TextView tvLat = (TextView) findViewById(R.id.tvLat);
            tvLat.setText(latitude.toString());

            TextView tvLong = (TextView) findViewById(R.id.tvLong);
            tvLong.setText(longitude.toString());

        } else {
            // We don't have location data
        }

    }

    public void onClick(View view) {

    }
}

However, Application keeps stopping.

Updated LogCat , after crashing was fixed, however still cannot display location

03-19 23:17:16.325 9261-9261/? I/art: Not late-enabling -Xcheck:jni (already on)
03-19 23:17:16.325 9261-9261/? W/art: Unexpected CPU variant for X86 using defaults: x86
03-19 23:17:16.574 9261-9261/com.example.escaper.lehome W/System: ClassLoader referenced unknown path: /data/app/com.example.escaper.lehome-1/lib/x86
03-19 23:17:16.673 9261-9291/com.example.escaper.lehome I/GMPM: App measurement is starting up
03-19 23:17:16.674 9261-9261/com.example.escaper.lehome I/InstantRun: starting instant run server: is main process
03-19 23:17:16.684 9261-9291/com.example.escaper.lehome E/GMPM: getGoogleAppId failed with status: 10
03-19 23:17:16.685 9261-9291/com.example.escaper.lehome E/GMPM: Uploading is not possible. App measurement disabled
03-19 23:17:16.752 9261-9261/com.example.escaper.lehome W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
03-19 23:17:16.947 9261-9300/com.example.escaper.lehome I/OpenGLRenderer: Initialized EGL, version 1.4
03-19 23:17:16.947 9261-9300/com.example.escaper.lehome D/OpenGLRenderer: Swap behavior 1
03-19 23:17:16.947 9261-9300/com.example.escaper.lehome W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
03-19 23:17:16.947 9261-9300/com.example.escaper.lehome D/OpenGLRenderer: Swap behavior 0
03-19 23:17:17.019 9261-9261/com.example.escaper.lehome W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView

Answer 1

It is created by this line:

LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);

if you call a function like getSystemService which needs Context, you cannot new them as class member like this. You must do it when Context is created, for example in onCreate(). So your code need to be like this:

LocationManager locationManager = null;

protected void onCreate(Bundle savedInstanceState) {
    ...
    locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
    ...
}

I have not checked all of your code and you may find other bugs too, but this part is obviously incorrect.