Basic Android: My First App

Basic Android: My First App

Create a android project named MyFirstApp.

Change the following files:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >     <TextView         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/hello" />     <EditText         android:id="@+id/edit_message"         android:layout_width="fill_parent"         android:layout_height="wrap_content"                 android:ems="10"         android:hint="@string/edit_message" >         <requestFocus />     </EditText>     <Button         android:id="@+id/button1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/button_send"         android:onClick="sendMessage" /> </LinearLayout>

Strings.xml

<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="hello">This Application is written by Kent Lau </string>     <string name="app_name">MyFirstApp</string>     <string name="edit_message">Please edit something here.</string>     <string name="button_send">Hantar Sekarang</string> </resources>

MyFirstAppActivity.java

package com.ugrowit; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.EditText; public class MyFirstAppActivity extends Activity {                         public final static String EXTRA_MESSAGE = "com.example.myapp.MESSAGE";                             /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {                     Intent intent = getIntent();         super.onCreate(savedInstanceState);         setContentView(R.layout.main);     }         /** Called when the user selects the Send button */     public void sendMessage(View view) {     // Do something in response to button             Intent intent = new Intent(this, DisplayMessageActivity.class);             EditText editText = (EditText)findViewById(R.id.edit_message);                         String message = editText.getText().toString();             intent.putExtra(EXTRA_MESSAGE, message);                         startActivity(intent);     } }

DisplayMessageActivity.java

package com.ugrowit; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.widget.TextView; public class DisplayMessageActivity extends Activity{                         @Override     public void onCreate(Bundle savedInstanceState) {                                 super.onCreate(savedInstanceState);         Intent intent = getIntent();         String message = intent.getStringExtra(MyFirstAppActivity.EXTRA_MESSAGE);         TextView textView = new TextView(this);         textView.setTextSize(40);         textView.setText(message);         setContentView(textView);     } }