工具类:
public class ViewUtils {
public static void setTouchDelegate(View view, int expandLeftValue, int expandTopValue, int expandRightValue, int expandBottomValue) {
View parentView = (View) view.getParent();
parentView.post(new Runnable() {
@Override
public void run() {
Rect rect = new Rect();
view.getHitRect(rect); //这个方法后rect里面便有了值
rect.left -= DpUtils.dip2px(view.getContext(), expandLeftValue);
rect.top -= DpUtils.dip2px(view.getContext(), expandTopValue);
rect.right += DpUtils.dip2px(view.getContext(), expandRightValue);
rect.bottom += DpUtils.dip2px(view.getContext(), expandBottomValue);
parentView.setTouchDelegate(new TouchDelegate(rect, view)); //委托给parentView
}
});
}
}
一个转换工具类:
public class DpUtils {
/**
* 根据手机的分辨率从 dip 的单位 转成为 px(像素)
*/
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
/**
* 将px值转换为sp值,保证文字大小不变
*/
public static int px2sp(Context context, float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale + 0.5f);
}
/**
* 将sp值转换为px值,保证文字大小不变
*/
public static int sp2px(Context context, float spValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (spValue * fontScale + 0.5f);
}
}
项目中使用:
![](https://img.haomeiwen.com/i6461854/670e9c8136724d07.png)
image.png
参考:
https://www.jianshu.com/p/80da2aec5dbc
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