Android霓虹灯效果

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Android霓虹灯效果

页面布局文件：

activity_main.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <TextView        android:id="@+id/tv1"        android:layout_width="300dip"        android:layout_height="300dip"        android:layout_gravity="center" />    <TextView        android:id="@+id/tv2"        android:layout_width="240dip"        android:layout_height="240dip"        android:layout_gravity="center" />    <TextView        android:id="@+id/tv3"        android:layout_width="180dip"        android:layout_height="180dip"        android:layout_gravity="center" />    <TextView        android:id="@+id/tv4"        android:layout_width="120dip"        android:layout_height="120dip"        android:layout_gravity="center" />    <TextView        android:id="@+id/tv5"        android:layout_width="60dip"        android:layout_height="60dip"        android:layout_gravity="center" /></FrameLayout>

主要业务操作代码：

MainActivity.java

public class MainActivity extends Activity {    private int[] colors = new int[] {0xFFFF0000, 0xFF00FF00, 0xFF0000FF, 0xFFFF00FF,             0xFF00FFFF};    private int[] nextColorsPointers = new int[] {1, 2, 3, 4, 0};    private View[] views;    private int currentColorPointer = 0;    private Handler handler;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        views = new View[] {findViewById(R.id.tv5), findViewById(R.id.tv4),                 findViewById(R.id.tv3), findViewById(R.id.tv2),findViewById(R.id.tv1)};        handler = new Handler();        Runnable runnable = new Runnable() {            @Override            public void run() {                int nextColorPointer = currentColorPointer;                for(int i = views.length - 1;  i >= 0; i --) {                    views[i].setBackgroundColor(colors[nextColorsPointers[nextColorPointer]]);                    nextColorPointer = nextColorsPointers[nextColorPointer];                }                currentColorPointer ++;                if(currentColorPointer == 5) {                    currentColorPointer = 0;                }                handler.postDelayed(this, 300);            }        };        handler.postDelayed(runnable, 300);    }}

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