java-me - J2ME 图像项目幻灯片

Question

我尝试过在 j2me 中使用图像幻灯片。下面是我的图像幻灯片代码。但它会执行图像不幻灯片并且不显示吗。

如果我单击播放按钮，图像将自动从图像 0.jpg 幻灯片放映到图像 7.jpg。

幻灯片的这个变量

 String[] Foto={"/0.jpg", "/1.jpg","/2.jpg", "/3.jpg","/4.jpg", "/5.jpg","/6.jpg", "/7.jpg"};
 Image[] img = new Image[8];

这个循环用于显示图像..

protected void paint(Graphics g) {
    try {

        g.setColor(255, 0, 0 );
        g.fillRect(0, 0, getWidth(), getHeight());
        g.setColor(255,0, 0);
        g.drawString(text,getWidth()/2, getHeight()/2,
        Graphics.TOP | Graphics.HCENTER);
        g.setColor(0, 255, 0);
        g.setColor(123,0,255);
        g.drawRect(74,74, 100,100 );
        g.drawRect(72,72, 104,104 );

                   for ( int i=0;i<8;i++)
                if (i==1)
                if (i==2)
           img[i]=Image.createImage(Foto[i]);
           g.drawImage(img [1],124,124, Graphics.VCENTER | Graphics.HCENTER );
           g.drawImage(img [2],124,124, Graphics.VCENTER | Graphics.HCENTER );
           g.drawImage(img [1],124,124, Graphics.VCENTER | Graphics.HCENTER );

    } catch (IOException ex) {
        ex.printStackTrace();
    }}

Answer 1

Paint() 中有一个循环，它将在 Canvas 上一张一张地绘制图像。尝试使用全局变量 currentIndex = 0

protected void paint(Graphics g) {
try {

    g.setColor(255, 0, 0 );
    g.fillRect(0, 0, getWidth(), getHeight());
    g.setColor(255,0, 0);
    g.drawString(text,getWidth()/2, getHeight()/2,
    Graphics.TOP | Graphics.HCENTER);
    g.setColor(0, 255, 0);
    g.setColor(123,0,255);
    g.drawRect(74,74, 100,100 );
    g.drawRect(72,72, 104,104 );


   img = Image.createImage(Foto[currentIndex]);
   g.drawImage(img,124,124, Graphics.VCENTER | Graphics.HCENTER );

} catch (IOException ex) {
    ex.printStackTrace();
}}

onClick你的按钮，你可以尝试

currentIndex++;
repaint();

如果您想要动画，您可以在重绘图像时更改 x 或 y