如何在屏幕上显示随机图像android

Question

我在drawable文件夹中有7张图片。我想在屏幕上随机显示它们。我是处理图形的新手。现在它只在屏幕上显示一个图像。如何在屏幕上显示随机图像？感谢

public class MyGraphics extends SurfaceView implements Runnable {

SurfaceHolder ourHolder;
Thread ourThread = null;
Boolean isRunning = true;
int[] images = new int[]{R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6,R.drawable.img7};


public void run() {

    while(isRunning){

        if(!ourHolder.getSurface().isValid())
         continue;

        Canvas ourCanvas = ourHolder.lockCanvas();
        ourCanvas.drawRGB(0, 0, 0);

        Bitmap img_blue = BitmapFactory.decodeResource(getResources(), R.drawable.mg1);
        ourCanvas.drawBitmap(img_blue, 0, 0, null);

        ourHolder.unlockCanvasAndPost(ourCanvas);
    }
}

Answer 1

生成随机数0-6并从int数组中获取图像源。

Random rn = new Random();    
int location=rn.rn.nextInt(7);    
Bitmap img_blue = BitmapFactory.decodeResource(getResources(), images[location]);