adam's code

MainActivity.java
===========================
package com.example.adm.myapplication;

import android.app.Activity;
import android.app.Fragment;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import android.content.Context;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;

import java.util.Objects;

public class MainActivity extends AppCompatActivity {


    EditText txtUserName;
    EditText txtUserPassword;
    TextView lblMsg;
    Context context;
    private int totalTry = 5;
    Button btnLogin;
    Button btnRegister;
    EditText txtUser,txtPass,txtPass2;


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


    }

    private void setPointer() {
        this.context = this;


        lblMsg = (TextView) findViewById(R.id.lblMsg);
        btnLogin = (Button) findViewById(R.id.btnLogin);
        btnRegister = (Button) findViewById(R.id.btnRegister);
        txtUser = (EditText) findViewById(R.id.txtUserName);
        txtPass = (EditText) findViewById(R.id.txtPassword);
        txtPass2 = (EditText) findViewById(R.id.txtPassword2);
        txtUserName = (EditText) findViewById(R.id.txtUserName);
        txtUserPassword = (EditText) findViewById(R.id.txtUserPassword);





        //listerners
    btnLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            login();
        }
    });

    btnRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            register();
        }
    });
}



    private void login() {
        String getUser=txtUserName.getText().toString();
        String getPass=txtUserPassword.getText().toString();

        if (totalTry == 0) {
            Toast.makeText(MainActivity.this, R.string.blocked, Toast.LENGTH_SHORT).show();
            return;
        }
        utlShared shared = new utlShared(this);
        if (shared.checkUserPassword(getUser, getPass)) {
            lblMsg.setText(R.string.userLoged);
            Intent intent = new Intent(this, Welcom.class);
            intent.putExtra("userName", getUser);
            startActivity(intent);

        } else {

            if (shared.checkUser(getUser)) {
                Toast.makeText(MainActivity.this, R.string.wrongpass, Toast.LENGTH_LONG).show();
            } else {
                showLoginErrorDialog();
            }
        }
    }


    public void register() {
        //create builder
        android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(context);
        //set title
        builder.setTitle(R.string.register);

        //inflate view from layout ->custom layout,null,false as defualt values
        View viewInflated = LayoutInflater.from(context).inflate(R.layout.dlg_new_task, null, true);

        final EditText txtUser = (EditText)viewInflated.findViewById(R.id.txtUserName);
        final EditText txtPass = (EditText)viewInflated.findViewById(R.id.txtPassword);
        final EditText txtPass2 = (EditText)viewInflated.findViewById(R.id.txtPassword2);

        builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();
            }
        });



        final utlShared myShared = new utlShared(context);
        builder.setPositiveButton(R.string.register, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();

                String pass1=txtPass.getText().toString();
                String pass2=txtPass2.getText().toString();

                if (!pass1.equals(pass2)) {
                    Toast.makeText(context, R.string.errorSamepass, Toast.LENGTH_LONG).show();
                    register();
                    return;
                }

                utlShared myShared = new utlShared(context);
                String userName=txtUser.getText().toString();

                //check if user exists
                if (myShared.checkUser(userName)) {
                    Toast.makeText(context, R.string.userExixst, Toast.LENGTH_SHORT).show();
                    register();
                    return;
                }
                //running the method of add user
                myShared.addUser(userName,pass1);



            }
        });

        //display our inflated view in screen
        builder.setView(viewInflated);
        //show the dialog
        builder.show();

    }



    private void showLoginErrorDialog() {
        final String getUser = txtUser.getText().toString();
        final utlShared shared = new utlShared(context);

        if (! shared.checkUser(getUser)) {
            new AlertDialog.Builder(context).setTitle(R.string.user_not_found)
                    .setMessage(R.string.wantToRegist)
                    .setPositiveButton(R.string.register, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {


                            dialogInterface.dismiss();
                            register();

                        }

                    })

                    .setNegativeButton(R.string.tryAgain, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            Toast.makeText(context, R.string.tryAgain, Toast.LENGTH_SHORT).show();
                            dialogInterface.dismiss();
                        }
                    })

                    .show();
        }
        }


}

Welcome.java
===============================

package com.example.adm.myapplication;


import android.app.AlertDialog;
import android.content.Context;

import android.content.DialogInterface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.InputType;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

public class Welcom extends AppCompatActivity {


    String userName;
    Context context;
    utlShared myUtl;
    ListView taskList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcom);
        setPointer();

    }

    private void setPointer()
    {
        this.context=this;
        userName=getIntent().getStringExtra("userName");
        myUtl = new utlShared(context);
        taskList=(ListView)findViewById(R.id.taskList);
        setListData();
        Toast.makeText(Welcom.this, "Welcome " +userName, Toast.LENGTH_SHORT).show();
    }

    private void setListData()
    {
        TaskAdapter adapter = new TaskAdapter(context,userName);
        taskList.setAdapter(adapter);
    }




    public void addCustomTask(View view)
    {
        //create builder
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        //set title
        builder.setTitle(R.string.addnewtask);

        //inflate view from layout ->custom layout,null,false as defualt values
        View viewInflated= LayoutInflater.from(context).inflate(R.layout.weed,null,false);

        final EditText txtCustomTask = (EditText)viewInflated.findViewById(R.id.txtTask);

        builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();
            }
        });

        builder.setPositiveButton(R.string.addtask, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                dialogInterface.dismiss();
                String myTask = txtCustomTask.getText().toString();
                //Toast.makeText(context, "task is:"+myText, Toast.LENGTH_SHORT).show();
                myUtl.task(userName,myTask,false);
                /////
                setListData();
            }
        });

        //display our inflated view in screen
        builder.setView(viewInflated);
        //show the dialog
        builder.show();

    }


}


TaskAdapter.java
=========================================

package com.example.adm.myapplication;

import android.content.Context;
import android.content.SharedPreferences;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Created by ADM on 9/3/2016.
 */
public class TaskAdapter extends BaseAdapter {

    //transfer context
    Context context;
    //transfer user to use for shared preferences
    String userName;
    //create a list of tasks.....
    List<taskItem> myTasks;

    //constructor, for creating the adapter we need from the user context and userName
    public TaskAdapter(Context context,String userName) {
        this.context = context;
        this.userName=userName;
        //go to user shared preferences and fill the list
        getData();
    }

    //how many item to display
    @Override
    public int getCount() {
        //return the myTasks size....
        return myTasks.size();
    }

    //return a specific item by index
    @Override
    public Object getItem(int i) {
        return myTasks.get(i);
    }

    //return index number
    @Override
    public long getItemId(int i) {
        return 0;
    }

    //create our view
    @Override
    public View getView(int index, View view, ViewGroup viewGroup) {
        //inflate the view inside view object -> viewInflated
        View viewInflated = LayoutInflater.from(context).inflate(R.layout.task_item,null,false);

        //set our inflated view behiver

        //set pointer for our inflated view

        //set pointer for task name....
        final TextView txtTaskName=(TextView)viewInflated.findViewById(R.id.taskName);
        //set pointer for task status....
        final Switch swTask=(Switch)viewInflated.findViewById(R.id.taskDone);

        //set task name, by the index of my myTasks collection
        txtTaskName.setText(myTasks.get(index).taskName);
        //set task status , switch is getting true/false
        swTask.setChecked(myTasks.get(index).taskStatus);


        //create listener event, when switch is pressed
        swTask.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //we using utlShared to update task status
                //create instance of utlShared
                utlShared myShared = new utlShared(context);
                //calling method of task, and giving userName(shared preferences, taskName, taskStatus)
                myShared.task(userName,txtTaskName.getText().toString(),swTask.isChecked());
                //we sending a message to the user, and inform him/her about the change
                Toast.makeText(context, swTask.isChecked()?"task done" :"Task undone...", Toast.LENGTH_SHORT).show();
            }
        });

        //return the view with the behiver.....
        return viewInflated;
    }

    private void getData()
    {
        //go to specific shared preferences by user name.....
        SharedPreferences taskPref=context.getSharedPreferences(userName,context.MODE_PRIVATE);

        //create instance of our myTasks list
        myTasks = new ArrayList<>();
        //get all tasks from shared preferances
        //the shared preferences is by key and value, therefor we will use Map collection
        //we know that the key is String, but we don't know what type of value we will get. <K,?>
        Map<String,?> tasks=taskPref.getAll();
        // transfer the data from map collection to list collection , single item is like the defination of the tasks <String,?>
        //Entry -> record , enterSet -> set of records
        for(Map.Entry<String,?> singleTask:tasks.entrySet())
        {
            //insert task to list by Key and Value, we check if value is equal to 1, becuase 1=true 0=false
            myTasks.add(new taskItem(singleTask.getKey(),singleTask.getValue().equals("1")));
        }
    }

}


TaskItem.java
==========================================================
package com.example.adm.myapplication;

/**
 * Created by ADM on 9/3/2016.
 */
public class taskItem {
    public String taskName;
    public boolean taskStatus;

    public taskItem(String taskName, boolean taskStatus) {
        this.taskName = taskName;
        this.taskStatus = taskStatus;
    }
}

utlShared.java
===============================================

package com.example.adm.myapplication;

import android.content.Context;
import android.content.SharedPreferences;
import android.renderscript.Sampler;
import android.text.Editable;
import android.util.Log;

import java.util.jar.Attributes;

/**
 * Created by ADM on 8/26/2016.
 */
public class utlShared {
    //context to use later
    Context context;
    //declatrtion of shared preferences object
    private SharedPreferences userPref;
    //declaration of shared preferences editor
    private SharedPreferences.Editor editor;

    public utlShared() {}

    public utlShared(Context context)
    {
        //get context to use it
        this.context=context;
        //declaretion of shared preferences with file name and file mode (private,public)
        userPref=context.getSharedPreferences("users",Context.MODE_PRIVATE);
        //declaration of editor
        editor=userPref.edit();
    }

    //get user and password
    public void addUser(String userName, String password)
    {
        //stores in the phone device under data\data\package name
        //put in shared preferences user name and password
        editor.putString(userName,password);
        //commit (save/apply) the changes.
        editor.commit();
    }

    public boolean checkUser(String userName)
    {
        //get name by key->userName
        String checkString = userPref.getString(userName,"na");

        //print to logcat a custom message.....
        Log.e("checkUser", "checkUser: "+checkString );
        //check if userName equals to responded data, if it's na, we don't havce the user...
        return !checkString.equals("na");
    }

    public boolean checkUserPassword(String userName, String userPassword)
    {
        String checkString = userPref.getString(userName,"na");
        return checkString.equals(userPassword);
    }

    public void task(String userName,String taskName,boolean taskDone)
    {
        //pointer to user task shared preferances
        SharedPreferences taskPref=context.getSharedPreferences(userName,Context.MODE_PRIVATE);
        //create editor to change the specific shared preferences
        SharedPreferences.Editor taskEditor=taskPref.edit();

        //add new task -> if true write 1 else write 0
        taskEditor.putString(taskName,taskDone?"1":"0");
        //apply the changes
        taskEditor.commit();
    }
}

activity_main.xml
==========================================================

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/myLogo"
            android:textSize="50sp">

        </TextView>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:orientation="vertical">

        <EditText
            android:id="@+id/txtUserName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/user_name"
            android:gravity="center"
            android:inputType="text"
            android:textSize="22sp" />

        <EditText
            android:id="@+id/txtUserPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/password1"
            android:gravity="center"
            android:inputType="textPassword"
            android:textSize="22sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/login"
            android:background="#00BFFF"
            android:textColor="#ffffff"
            android:textSize="32sp"
            android:id="@+id/btnLogin"
            android:layout_marginBottom="20dp"/>

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/register"
            android:background="#00BFFF"
            android:textColor="#ffffff"
            android:textSize="32sp"
            android:id="@+id/btnRegister"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:textSize="32sp"
            android:text="@string/my_login_system"
            android:gravity="center"
            android:id="@+id/lblMsg"/>
    </LinearLayout>
</LinearLayout>


activity_welcom.xml
===================================================

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >


    <Button android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/addtask"
        android:onClick="addCustomTask"

        />

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/taskList"
        />
</LinearLayout>


dlg_new_task.xml
==================================================================

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:gravity="center">

    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/task"/>

    <EditText
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:hint="@string/user_name"
    android:id="@+id/txtUserName"/>

    <EditText
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:hint="@string/password1"
    android:id="@+id/txtPassword"/>

    <EditText
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:hint="@string/password2"
        android:id="@+id/txtPassword2"/>
</LinearLayout>


task_item.xml
==============================================================================================


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:orientation="horizontal"
    android:layoutDirection="rtl"
    android:layout_margin="20dp"
    >

    <Switch
        android:layout_width="40dp"
        android:layout_height="wrap_content"
        android:id="@+id/taskDone"
        />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="22sp"
        android:id="@+id/taskName"
        android:text="EXAMPLE FOR TASK"
        />
</LinearLayout>


weed.xml
=======================================================================================

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:gravity="center">

    <ImageView
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@drawable/task"/>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/addtask"
        android:id="@+id/txtTask"/>
</LinearLayout>


strings.xml
=========================================================


<resources>
    <string name="app_name"> האפלקציה שלי </string>
    <string name="user_name"> שם משתמש </string>
    <string name="password1"> סיסמה </string>
    <string name="password2">   סימסה עוד פעם</string>
    <string name="register">  הרשמה </string>
    <string name="login"> כניסה </string>
    <string name="cancel"> חזרה </string>
    <string name="regist_accept"> נרשמת בהצלחה </string>
    <string name="welcome"> ברוך הבא </string>
    <string name="myLogo"> הלוגו שלי </string>
    <string name="my_login_system"> מערכת הרשמה שלי </string>
    <string name="user_not_found"> משתמש לא נמצא </string>
    <string name="wantToRegist"> רוצה להירשם </string>
    <string name="tryAgain">  נסה שוב </string>
    <string name="errorSamepass"> סיסמאות לא זהות </string>
    <string name="userExixst"> משתמש קיים </string>
    <string name="userLoged"> משתמש נכנס </string>
    <string name="blocked"> נחסמת </string>
    <string name="wrongpass"> סיסמה שגויה </string>
    <string name="addnewtask"> הוספ משימה חדשה </string>
    <string name="addtask"> הוסף משימה </string>
    <string name="taskis"> משימה היא </string>
    <string name="taskdone"> משימה בוצעה </string>
    <string name="taskUndone"> משיצה לא בומעה </string>
</resources>


AndroidManifests.xml
=======================================================================================

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".Welcom" />
        <!-- ATTENTION: This was auto-generated to add Google Play services to your project for
     App Indexing.  See https://g.co/AppIndexing/AndroidStudio for more information. -->
        <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
    </application>

</manifest>