Android中实现多彩的霓虹灯

厌伴老儒烹瓠叶，强随举子踏槐花。这篇文章主要讲述Android中实现多彩的霓虹灯相关的知识，希望能为你提供帮助。
1、布局文件

< ?xml version="1.0" encoding="utf-8"?>
< LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mainll"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.lixc.neonlight.MainActivity"
android:orientation="vertical">

< /LinearLayout>

2、color.xml文件

< ?xml version="1.0" encoding="utf-8"?>
< resources>
< color name="color1"> #ffff0000< /color>
< color name="color2"> #ffff6600< /color>
< color name="color3"> #ffffff00< /color>
< color name="color4"> #ff00ff00< /color>
< color name="color5"> #ff00ffff< /color>
< color name="color6"> #ff0000ff< /color>
< color name="color7"> #ff6600ff< /color>
< /resources>

3、在MainActivity中声明成员变量

private Handler handler;
private static LinearLayout linearLayout;
public static TextView[] textViews = new TextView[14];
int[] bgColor = new int[]{R.color.color1, R.color.color2, R.color.color3,
R.color.color4, R.color.color5, R.color.color6, R.color.color7};
private int index = 0;

4、在MainActivity中的onCreate()方法中，添加文本框组件到线性布局管理器中

linearLayout = (LinearLayout)findViewById(R.id.mainll);
int height = this.getResources().getDisplayMetrics().heightPixels;
for (int i=0; i< textViews.length; i++){
textViews[i] = new TextView(this);
textViews[i].setWidth(this.getResources().getDisplayMetrics().widthPixels);
textViews[i].setHeight(height/textViews.length);
linearLayout.addView(textViews[i]);
}

5、创建新线程，重写run()方法

new Thread(new Runnable() {
@Override
public void run() {
while (!Thread.currentThread().isInterrupted()){
Message message = new Message();
message.what = 1;
handler.sendMessage(message);
try {
Thread.sleep(new Random().nextInt(1000));
}catch (Exception e){
e.printStackTrace();
}
}
}
}).start();

6、创建一个Handler对象，重写handleMessage()方法

handler = new Handler(){
@Override
public void handleMessage(Message msg){
int temp = 0;
switch (msg.what){
case 1:
for (int i=0; i< textViews.length; i++){
temp = new Random().nextInt(bgColor.length);
if (index == temp){
temp++;
if (temp == bgColor.length){
temp = 0;
}
}
index = temp;
textViews[i].setBackgroundColor(getResources().getColor(bgColor[index]));
}
break;
default:
break;
}
super.handleMessage(msg);
}
};