要在Android中使用GPUImage库在触摸时去除图像模糊,可以按照以下步骤进行操作:
dependencies {
implementation 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.4.1'
}
GPUImageView gpuImageView = findViewById(R.id.gpuImageView);
gpuImageView.setImage(R.drawable.your_image); // 设置要显示的图像资源
public class TouchImageView extends GPUImageView {
private float touchX, touchY;
public TouchImageView(Context context) {
super(context);
}
public TouchImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
touchX = event.getX();
touchY = event.getY();
// 根据触摸位置调整滤镜参数
GPUImageFilter filter = getFilter(); // 获取当前的滤镜
if (filter instanceof GPUImageGaussianBlurFilter) {
GPUImageGaussianBlurFilter blurFilter = (GPUImageGaussianBlurFilter) filter;
blurFilter.setBlurSize(calculateBlurSize());
requestRender(); // 请求渲染更新
}
break;
}
return super.onTouchEvent(event);
}
private float calculateBlurSize() {
// 根据触摸位置计算模糊程度,这里可以根据实际需求进行调整
float maxBlurSize = 10.0f; // 最大模糊程度
float touchThreshold = 0.5f; // 触摸位置阈值,超过此值才生效
float normalizedX = touchX / getWidth();
float normalizedY = touchY / getHeight();
float distanceToCenter = (float) Math.sqrt(Math.pow(normalizedX - 0.5f, 2) +
Math.pow(normalizedY - 0.5f, 2));
float blurSize = maxBlurSize * Math.max(0, distanceToCenter - touchThreshold) /
(0.5f - touchThreshold);
return blurSize;
}
}
TouchImageView touchImageView = new TouchImageView(this);
touchImageView.setImage(R.drawable.your_image); // 设置要显示的图像资源
FrameLayout container = findViewById(R.id.container);
container.addView(touchImageView, new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.MATCH_PARENT));
通过以上步骤,可以在Android应用中使用GPUImage库,在触摸时根据触摸位置实时调整滤镜参数,从而去除图像模糊。