demo of class 18/8

AndroidManifest
=======================
  <uses-permission android:name="android.permission.CALL_PHONE" />

MainActivity.java
=====================
public class MainActivity extends AppCompatActivity {


    EditText txtUserName;
    EditText txtUserPass;
    TextView lblMsg;
    final String MY_USER="zeev";
    final String MY_PASS="12345";
    private int totalTry=5;
    Context context;

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

    private void setPointer()
    {
        context=this;
        txtUserName=(EditText)findViewById(R.id.txtUserName);
        txtUserPass=(EditText)findViewById(R.id.txtUserPassword);
        lblMsg=(TextView)findViewById(R.id.lblMsg);
    }

    public void btnClick(View view)
    {
        String getUser=txtUserName.getText().toString();
        String getPass=txtUserPass.getText().toString();

        if (totalTry==0) {
            Toast.makeText(MainActivity.this, "You are an idiot!!", Toast.LENGTH_SHORT).show();
            return;
        }

        if (getUser.equals(MY_USER) && getPass.equals(MY_PASS))
        {
            //lblMsg.setText("User loged...");
            Intent myIntent = new Intent(this,Welcome.class);
            startActivity(myIntent);
            //startActivity(new Intent(this,Welcome.class));
            finish();
        }
        else
        {
            totalTry--;
            Toast.makeText(MainActivity.this, "you have "+totalTry+" times", Toast.LENGTH_LONG).show();

        }
    }

}



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"
    android:background="@drawable/my_background">

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

       <ImageView
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
           android:src="@drawable/google"/>
    </LinearLayout>

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

        <EditText
            android:id="@+id/txtUserName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter your name...."
            android:inputType="text"
            android:textSize="22sp" />

        <EditText
            android:id="@+id/txtUserPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter Password..."
            android:inputType="textPassword"
            android:textSize="22sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:orientation="vertical">

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Login"
            android:background="#91E0FF"
            android:textColor="#ffffff"
            android:textSize="32sp"
            android:onClick="btnClick"/>
    </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="MY LOGIN SYSTEM V1"
            android:gravity="center"
            android:id="@+id/lblMsg"/>
    </LinearLayout>
</LinearLayout>


Welcome.java
=================
public class Welcome extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.welcome);
        //utlTest.showMsg(this);

        //create the number we want by String !!!!
        String posted_by = "048772538";
        //create string that is trimmed
        String uri = "tel:" + posted_by.trim() ;
        //create implicty intent of dial
        Intent intent = new Intent(Intent.ACTION_DIAL);
        //sending data to implicity intent
        intent.setData(Uri.parse(uri));
        //start the activity......
        startActivity(intent);

    }
}


welcome.xml
====================
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/my_background">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="WELCOME"
        android:textSize="50sp"
        android:gravity="center"
        />
</LinearLayout>


utlTest.java
======================
public class utlTest {

    public static void showMsg(Context context)
    {
        Toast.makeText(context, "Hello michal!!!", Toast.LENGTH_LONG).show();
    }
}