要在Android中实现仅从左侧模糊图像的效果,您可以使用RenderScript库。以下是一个代码示例,演示了如何使用RenderScript模糊图像:
#pragma version(1)
#pragma rs java_package_name(com.yourpackage)
rs_allocation inputImage;
rs_allocation outputImage;
int width;
int height;
void root(const uchar4 *v_in, uchar4 *v_out, const void *usrData, uint32_t x, uint32_t y) {
if (x < width / 2) {
*v_out = *v_in;
} else {
uint32_t r = 0;
uint32_t g = 0;
uint32_t b = 0;
uint32_t a = 0;
int count = 0;
for (int dx = -2; dx <= 2; dx++) {
for (int dy = -2; dy <= 2; dy++) {
int newX = x + dx;
int newY = y + dy;
if (newX >= 0 && newX < width && newY >= 0 && newY < height) {
uchar4 pixel = rsGetElementAt_uchar4(inputImage, newX, newY);
r += pixel.r;
g += pixel.g;
b += pixel.b;
a += pixel.a;
count++;
}
}
}
*v_out = rsPackColorTo8888(r/count, g/count, b/count, a/count);
}
}
private void blurImage(Bitmap inputBitmap, ImageView imageView) {
Bitmap outputBitmap = Bitmap.createBitmap(inputBitmap.getWidth(), inputBitmap.getHeight(), inputBitmap.getConfig());
RenderScript rs = RenderScript.create(this);
Allocation input = Allocation.createFromBitmap(rs, inputBitmap);
Allocation output = Allocation.createFromBitmap(rs, outputBitmap);
ScriptC_blur blurScript = new ScriptC_blur(rs);
blurScript.setInputImage(input);
blurScript.setOutputImage(output);
blurScript.set_width(inputBitmap.getWidth());
blurScript.set_height(inputBitmap.getHeight());
blurScript.forEach_root(input, output);
output.copyTo(outputBitmap);
imageView.setImageBitmap(outputBitmap);
input.destroy();
output.destroy();
blurScript.destroy();
rs.destroy();
}
Bitmap inputBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.your_image);
ImageView imageView = findViewById(R.id.imageView);
blurImage(inputBitmap, imageView);
请确保在布局文件中正确设置ImageView的id。
这些代码将仅从图像的左侧一半模糊图像,并将模糊后的图像设置为ImageView的内容。您可以根据需要调整RenderScript文件中的模糊算法来获得所需的效果。