Helper methods for Android Apps

Utils.java

package br.com.brgweb.utilsexample;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.support.v4.content.ContextCompat;
import android.text.InputType;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

public class Utils {

    /**
     * Creates an ACTION_SEND intent to message the app Google Play link
     *
     * @param v       View    the View that called the method
     * @param message String  the message that will prepend the link
     */
    public static void SendIntent(View v, String message) {
        Intent sendIntent = new Intent();
        sendIntent.setAction(Intent.ACTION_SEND);
        sendIntent.putExtra(Intent.EXTRA_TEXT, message + "https://play.google.com/store/apps/details?id=" + v.getContext().getPackageName());
        sendIntent.setType("text/plain");
        v.getContext().startActivity(sendIntent);
    }

    /**
     * Creates an ACTION_SEND intent to share the app Google Play Link
     *
     * @param v       View    the View that called the method
     * @param message String  the message that will prepend the link
     */
    public static void ShareIntent(View v, String message) {
        Intent sharingIntent = new Intent(Intent.ACTION_SEND);
        ApplicationInfo applicationInfo = context.getApplicationInfo();
        int stringId = applicationInfo.labelRes;
        String appName = stringId == 0 ? applicationInfo.nonLocalizedLabel.toString() : context.getString(stringId);
        sharingIntent.setType("text/plain");
        String shareBody = message + "https://play.google.com/store/apps/details?id=" + v.getContext().getPackageName())
        ;
        sharingIntent.putExtra(Intent.EXTRA_SUBJECT, appName);
        sharingIntent.putExtra(Intent.EXTRA_TEXT, shareBody);
        v.getContext().startActivity(Intent.createChooser(sharingIntent, "Compartilhar"));
    }

    /**
     * Send the user to Google Play Store to rate the app
     *
     * @param v View    the View that called the method
     */
    public static void RateIntent(View v) {
        Uri uri = Uri.parse("market://details?id=" + v.getContext().getPackageName());
        Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);
        try {
            v.getContext().startActivity(goToMarket);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(v.getContext(), "Não foi possível iniciar a Play Store.", Toast.LENGTH_SHORT).show();
        }
    }


    /**
     * Start activity to send an email with a bug report
     *
     * @param v View    the View that called the method
     */
    public static void BugReportIntent(final View v) {

        AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
        builder.setTitle("Avisar Erro no App");
        final String[] message_text = new String[1];
        // Set up the input
        final EditText input = new EditText(v.getContext());
        input.setInputType(InputType.TYPE_CLASS_TEXT);
        builder.setView(input);
        // Set up the buttons
        builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                message_text[0] = input.getText().toString();
                ApplicationInfo applicationInfo = context.getApplicationInfo();
                int stringId = applicationInfo.labelRes;
                String appname = stringId == 0 ? applicationInfo.nonLocalizedLabel.toString() : context.getString(stringId);
                Intent i = new Intent(Intent.ACTION_SEND);
                i.setType("message/rfc822");
                i.putExtra(Intent.EXTRA_EMAIL, new String[]{"[email protected]"});
                i.putExtra(Intent.EXTRA_SUBJECT, "[" + appname + "] Aviso de Erro");
                i.putExtra(Intent.EXTRA_TEXT, message_text[0]);
                try {
                    v.getContext().startActivity(Intent.createChooser(i, "Enviar email..."));
                } catch (ActivityNotFoundException ex) {
                    Toast.makeText(v.getContext(), "Nenhum aplicativo de email encontrado. Por favor envie mensagem na Play Store", Toast.LENGTH_SHORT).show();
                }
            }
        });
        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.cancel();
            }
        });

        builder.show();
    }

    /**
     * Logout function that clear all Paper.book data and restarts main activity
     *
     * @param v View    the View that called the method
     */
    public static void Logout(View v) {
        Paper.init();
        Paper.book.destroy();
        Intent intent = getIntent();
        finish();
        startActivity(intent);

    }

    /**
     * Check if app has a specific permission granted
     *
     * @param permission String      the permission name
     * @param a          Acitivity   the activity from wich the method was called
     * @return boolean     if the permission was granted
     */
    public boolean hasPermission(String permission, Activity a) {
        int permissionCheck = ContextCompat.checkSelfPermission(a, permission);
        return permissionCheck == PackageManager.PERMISSION_GRANTED;
    }

    /**
     * Check if the user has internet connection
     *
     * @param c Context     the Context that called the method
     * @return boolean     if the user has connection
     */
    public static boolean hasConnection(Context c) {
        ConnectivityManager cm = (ConnectivityManager) c.getSystemService(CONNECTIVITY_SERVICE);
        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        if (activeNetwork != null) {
            if ((activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) ||
                    (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)) {
                return true;
            }
        } else {
            return false;
        }
        return false;
    }

    /**
     *
     * Shows a dialog to configure network. If the user doesn't configure, it closes the app.
     *
     * @param message   String  the message to show in the dialog
     * @param v         View    the view that called the method
     * @param close     boolean should the app be closed if user cancel the dialog
     */
    public static void connectionDialog(String message, View v, boolean close){
        android.support.v7.app.AlertDialog.Builder alertDialogBuilder = new android.support.v7.app.AlertDialog.Builder(v);
        alertDialogBuilder.setMessage(message)
                .setCancelable(false)
                .setPositiveButton("Configurar",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0);
                            }
                        })
                .setNegativeButton("Cancelar",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                dialog.cancel();
                                if (close) {
                                    closeApp(getActivity());
                                }
                            }
                        });
        android.support.v7.app.AlertDialog alert = alertDialogBuilder.create();
        alert.show();
    }

    /**
     *
     * Finish activity and close the App
     *
     * @param a     Activity    the activity
     */
    public static void closeApp(Activity a){
        if (android,os.Build.VERSION_SDK_INT <= 15){
            a.finish();
            System.exit(0);
        }else if (android,os.Build.VERSION_SDK_INT <= 20){
            a.finishAffinity();
        }else if (android,os.Build.VERSION_SDK_INT >= 21){
            a.finishAndRemoveTask();
        }
    }

}