Sample Android Login Application

Sample Android Login Application

After developing wide range of Java applications including Web and Desktop based since about four and half years now I have started learning Android Since last one month and day by day I'm getting very keen in learning the Same.

Following is the Sample Android Login Application which I have developed and would like to share with everyone.
This Application is at its very basic stage, Irrespective of the database used.

It works as follows:
If User Name and Password Entered are similar it gives a Toast pop up saying that "Login Successful"
Else It will give a Toast pop up Saying that "Invalid Login"

I feel it will help the Android learning beginners:

This application is developed on Following platforms:
Ubuntu 10.10,
Eclipse 3.5 Galileo
Android 2.1 SDK

Following is the Screen short of the Application:

Following is the Screen short of the Application:

I have used Table Layout, Following is the Layout Code for the Same:


<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:stretchColumns="1">
     
<TableRow>
<TextView 
android:text="User Name: " 
android:id="@+id/TextView01" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content">
</TextView>

<EditText 
android:text="" 
android:id="@+id/txtUname" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content">
</EditText>
</TableRow>


<TableRow>
<TextView 
android:text="Password: " 
android:id="@+id/TextView02" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content">
</TextView>


<EditText 
android:text="" 
android:id="@+id/txtPwd" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content"
android:password="true">
</EditText>
</TableRow>


<TableRow>
<Button
android:text="Cancel" 
android:id="@+id/btnCancel" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content">
</Button>


<Button
android:text="Login" 
android:id="@+id/btnLogin" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content">
</Button>


</TableRow>


</TableLayout>



Following is the Activity Code for the Application:


package com.mayuri.login;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;


public class SampleLogin extends Activity {

EditText txtUserName;
EditText txtPassword;
Button btnLogin;
Button btnCancel;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        txtUserName=(EditText)this.findViewById(R.id.txtUname);
        txtPassword=(EditText)this.findViewById(R.id.txtPwd);
        btnLogin=(Button)this.findViewById(R.id.btnLogin);
        btnLogin=(Button)this.findViewById(R.id.btnLogin);
        btnLogin.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

if((txtUserName.getText().toString()).equals(txtPassword.getText().toString())){
         Toast.makeText(SampleLogin.this, "Login Successful",Toast.LENGTH_LONG).show();
        } else{
         Toast.makeText(SampleLogin.this, "Invalid Login",Toast.LENGTH_LONG).show();
        }

}
});       
    }
} 




Following are the Screenshots of the Applications, Depending on their behaviours i.e. "Login Success" and "Invalid Login".