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Using color in Android, by Java code
In last article, Using color in Android, by XML, described how to define color in XML file. Here, changing color using Java code will be described.
Keep using the main.xml and mycolor.xml
Modify Java code
package com.exercise.AndroidColor;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
public class AndroidColor extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final LinearLayout backGround = (LinearLayout)findViewById(R.id.background);
Button whiteButton = (Button)findViewById(R.id.whitebutton);
Button redButton = (Button)findViewById(R.id.redbutton);
Button greenButton = (Button)findViewById(R.id.greenbutton);
Button blueButton = (Button)findViewById(R.id.bluebutton);
whiteButton.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
backGround.setBackgroundResource(android.R.color.white);
}});
redButton.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
backGround.setBackgroundColor(0xff000000 + 0xff0000);
}});
greenButton.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
backGround.setBackgroundResource(R.color.green);
}});
blueButton.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
backGround.setBackgroundResource(R.color.blue);
}});
}
}
Download the files.출처 : http://android-er.blogspot.com/
