搜刮各个论坛组合一个直接可用的,可根据自己的的项目情况,修改封装
放在glsurfaceview的onDrawFrame方法中,外面添加一个boolean去控制执行,如果render是被动刷新,执行requestrender
这个截图一定要放在onDrawFrame最后,否者截图可能导致黑屏或白屏
public class FMScreenShotUtil {
public static void screenShot(Context context,GL10 gl, int x, int y, int w, int h) {
Bitmap bmp = createBitmapFromGLSurface(context,0, 0, w, h, gl);
saveAndRefrash(context, bmp);
}
private static Bitmap createBitmapFromGLSurface(Context context,int x, int y, int w, int h, GL10 gl) throws OutOfMemoryError {
int bitmapBuffer[] = new int[w * h];
int bitmapSource[] = new int[w * h];
IntBuffer intBuffer = IntBuffer.wrap(bitmapBuffer);
intBuffer.position(0);
try {
gl.glReadPixels(x, y, w, h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE,
intBuffer);
int offset1, offset2;
for (int i = 0; i < h; i++) {
offset1 = i * w;
offset2 = (h - i - 1) * w;
for (int j = 0; j < w; j++) {
int texturePixel = bitmapBuffer[offset1 + j];
int blue = (texturePixel >> 16) & 0xff;
int red = (texturePixel << 16) & 0x00ff0000;
int pixel = (texturePixel & 0xff00ff00) | red | blue;
bitmapSource[offset2 + j] = pixel;
}
}
} catch (GLException e) {
return null;
}
return Bitmap.createBitmap(bitmapSource, w, h, Bitmap.Config.ARGB_8888);
}
private static String saveAndRefrash(Context context, Bitmap bitmap) {
String cacheDirectory = Environment.getExternalStorageDirectory().getPath();
long l = System.currentTimeMillis();
String filePath = cacheDirectory + l + ".png";
File imagePath = new File(filePath);
FileOutputStream fos = null;
try {
fos = new FileOutputStream(imagePath);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
} catch (Exception e) {
} finally {
try {
fos.close();
bitmap.recycle();
bitmap = null;
//最后通知图库更新
Intent intent = new Intent();
intent.setAction(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);//扫描单个文件
intent.setData(Uri.fromFile(imagePath));//给图片的绝对路径
context.sendBroadcast(intent);
} catch (Exception e) {
}
}
return filePath;
}
}
本文介绍了一种在 OpenGL ES 环境下进行屏幕截图的方法,通过在 GLSurfaceView 的 onDrawFrame 方法中调用,实现对当前帧的捕获并保存为图片。该方法适用于需要在应用中加入屏幕截图功能的项目。
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