android手动绘制矩形框
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
if(is_select_area){
downX = x;
downY = y;
downRectF.set(downX, downY, downX, downY);
//表示可以改变矩形形状 得是矩形确认形状后
if (sideBoxRectF.contains(downRectF) && !dragRectF.contains(downRectF) && boxRectConfirm) {
changeBoxSide = true;
}
if (dragRectF.contains(downRectF) && boxRectConfirm) {
dragBox = true;
}
lastX = x;
lastY = y;
}
if(is_selected){
downX = x;
downY = y;
dragRectF.set(rect);
// downRectF.set(downX, downY, downX, downY);
// //表示可以改变矩形形状 得是矩形确认形状后
if (sideBoxRectF.contains(downRectF) && !dragRectF.contains(downRectF) && boxRectConfirm) {
changeBoxSide = true;
}
if (dragRectF.contains(downRectF) && boxRectConfirm) {
dragBox = true;
}
lastX = x;
lastY = y;
}
break;
case MotionEvent.ACTION_MOVE:
float offsetX = x - lastX;
float offsetY = y - lastY;
if(is_selected){
if (dragBox) {//手指按下点，在上一个lastBoxRectF矩形内，才考虑执行下面的代码 因为boxRectF会变的，有可能导致变着变着boxRectF包含了downRectF
rect.offset( offsetX, offsetY);
}
//拖动边缘改变View大小和形状
//当左边框小到一定程度就不响应了
//感觉需要对 矩形上下左右区域做下区分
if (leftRectF.contains(downRectF)) {//左区域
rect.left += offsetX;
} else if (leftTopRectF.contains(downRectF) && !dragRectF.contains(downRectF)) {//左上区域 特殊在，点击位置不位于上一次的标注框内
rect.left += offsetX;
rect.top += offsetY;
} else if (topRectF.contains(downRectF)) {//上区域
rect.top += offsetY;
} else if (rightTopRectF.contains(downRectF) && !dragRectF.contains(downRectF)) {
rect.top += offsetY;
rect.right += offsetX;
} else if (rightRectF.contains(downRectF)) {//右区域
rect.right += offsetX;
} else if (rightBottomRectF.contains(downRectF) &&a