Android霓虹灯效果

最新推荐文章于 2022-03-22 08:52:41 发布

凹凸曼一枚

最新推荐文章于 2022-03-22 08:52:41 发布

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分类专栏： Android 文章标签：布局 FrameLayout Handler Layout Runnable

本文链接：https://blog.youkuaiyun.com/monkeyzsf/article/details/39701177

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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);
    }

}