Sample Log-in Screen:
User Interface:
Username and password edit field with login Button.(main.xml)
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_height="wrap_content" android:layout_width="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="@+id/UserNameText"
android:text="UserName" android:typeface="sans" android:textStyle="bold"></TextView>
<EditText android:layout_height="wrap_content" android:hint="User Name"
android:layout_width="fill_parent" android:id="@+id/username"></EditText>
</LinearLayout>
<LinearLayout android:id="@+id/LinearLayout02"
android:layout_height="wrap_content" android:layout_width="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content" android:id="@+id/PasswordText"
android:text="Password" android:textStyle="bold"></TextView>
<EditText android:layout_height="wrap_content" android:hint="Password"
android:singleLine="true" android:layout_width="fill_parent"
android:id="@+id/password"></EditText>
</LinearLayout>
<Button android:layout_height="wrap_content" android:id="@+id/login"
android:text="Login" android:layout_gravity="center"
android:layout_width="100px"></Button>
</LinearLayout>
Activity:
On Clicking on login button , displays an dialog with username
LoginActivity.java
package com.login;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class LoginActivity extends Activity {
/** Called when the activity is first created. */
// Retrieve username and password using id.
EditText userName = null;
EditText password = null;
// Button
Button loginButton = null;
Context context = null;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
userName = (EditText)findViewById(R.id.username);
password = (EditText)findViewById(R.id.password);
loginButton = (Button)findViewById(R.id.login);
loginButton.setOnClickListener(new Button.OnClickListener()
{
@Override
public void onClick(View arg0)
{
showDialog();
}
});
}
/**
* On clicking login button, dialog is displayed with userName
*/
private void showDialog()
{
Builder alert = new AlertDialog.Builder(this);
alert.setMessage("Welcome "+userName.getText()+"!!!!");
alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
alert.show();
}
}
Output:
