IllegalArgumentException : y + height must be <= bitmap.height()

最新推荐文章于 2024-04-30 15:42:44 发布

zgf1991

最新推荐文章于 2024-04-30 15:42:44 发布

阅读量8.9k

点赞数

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/zgf1991/article/details/9013675

本文介绍了一个Android应用中遇到的截图问题及其解决方案。问题出现在尝试从Activity中获取屏幕截图时，在真实设备上出现异常，但模拟器正常。文章详细展示了出现问题的代码片段，并提供了解决方案的链接。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

网上找的一个截屏的代码，出现这个错误，模拟器没问题，手机给出问题了.......

public class ScreenShot {

	// 获取指定Activity的截屏，保存到png文件
	private static Bitmap takeScreenShot(Activity activity) {

		// View是你需要截图的View
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap b1 = view.getDrawingCache();

		// 获取状态栏高度
		Rect frame = new Rect();
		activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
		int statusBarHeight = frame.top;
		System.out.println(statusBarHeight);

		// 获取屏幕长和高
		int width = activity.getWindowManager().getDefaultDisplay().getWidth();
		int height = activity.getWindowManager().getDefaultDisplay()
				.getHeight();
		DisplayMetrics dm = activity.getResources().getDisplayMetrics();
		int displayWidth = dm.widthPixels;
		int displayHeight = dm.heightPixels;
		
		//
		int contentTop = activity.getWindow()
				.findViewById(Window.ID_ANDROID_CONTENT).getTop();
		// statusBarHeight是上面所求的状态栏的高度
		int titleBarHeight = contentTop - statusBarHeight;
		int cutHeight = titleBarHeight + statusBarHeight;
		
		int bHeight = b1.getHeight();
		int nHeight=height - cutHeight;
		if((cutHeight +nHeight)>bHeight){
			nHeight = bHeight - cutHeight;
		}
		// 去掉标题栏
		// Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
		Bitmap b = Bitmap.createBitmap(b1, 0, cutHeight, width,  nHeight);
		view.destroyDrawingCache();
		//问题
//		 if (y + height > source.getHeight()) {
//	            throw new IllegalArgumentException("y + height must be <= bitmap.height()");
//	        }
		return b;
	}

	// 保存到sdcard
	private static void savePic(Bitmap b, String strFileName) {
		FileOutputStream fos = null;
		try {
			fos = new FileOutputStream(strFileName);
			if (null != fos) {
				b.compress(Bitmap.CompressFormat.PNG, 90, fos);
				fos.flush();
				fos.close();
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	// 程序入口
	public static void shoot(Activity a) {
		ScreenShot.savePic(ScreenShot.takeScreenShot(a), "sdcard/xx.png");
	}
}

以上代码是我加了处理的，很乱~

解决方法是看下面网站不看源码的孩子伤不起啊!!!

慎用Bitmap.createBitmap http://www.mclouder.com/portal.php?mod=view&aid=10

  翻看Bitmap.java，找到createBitmap都是调用的这个重构方法：
public static Bitmap createBitmap(Bitmap source, int x, int y, int width, int height,
         Matrix m, boolean filter) {

      checkXYSign(x, y);
      checkWidthHeight(width, height);
      if (x + width > source.getWidth()) {
         throw new IllegalArgumentException("x + width must be <= bitmap.width()");
      }
      if (y + height > source.getHeight()) {
         throw new IllegalArgumentException("y + height must be <= bitmap.height()");
      }