14/08/2012
1. Add Images To Resources
Prepare 3 images for button states, and put it into “resource/drawable” folder.- button_normal_green.png – Default image button.
- button_focused_orange.png – Display when button is focused, for example, when phone’s keypad is move (focus) on this button.
- button_pressed_yellow.png – Display when button is pressed.
2. Add Selector For Different Button States
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:drawable="@drawable/button_pressed_yellow" android:state_pressed="true" /> <item android:drawable="@drawable/button_focused_orange" android:state_focused="true" /> <item android:drawable="@drawable/button_normal_green" /> </selector>
3. Add Button
<?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" >
<Button
android:id="@+id/imageButtonSelector"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/new_button" />
</LinearLayout>
4. Code Code
package com.mkyong.android;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.Toast;
import android.view.View;
import android.view.View.OnClickListener;
public class MyAndroidAppActivity extends Activity {
Button imageButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
addListenerOnButton();
}
public void addListenerOnButton() {
imageButton = (Button) findViewById(R.id.imageButtonSelector);
imageButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
Toast.makeText(MyAndroidAppActivity.this,
"ImageButton (selector) is clicked!",
Toast.LENGTH_SHORT).show();
}
});
}
}
5. Demo
Run the application. 1. Result, default button. (button_normal_green.png)
