如何ImageView的重置鉴于寻呼机原来的位置？ [英] How to reset imageview to original position in view pager?
本文介绍了如何ImageView的重置鉴于寻呼机原来的位置？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我使用我在哪里，从服务获取图像视图寻呼机。问题是当我放大缩小图片，并轻扫下一个图像，然后转到previous图像，即previous图像仍处于缩放视图。如何恢复到原来的位置。
我查了很多资源，包括 Chrisbanes PhotoView中库。但没有为我提供了解决方案。如何解决此问题？
请提供我一个解决方案这一点。
先谢谢了。
我的code是如下：
自定义的TouchView被使用。
公共类TouchImageView扩展了ImageView的{矩阵矩阵;//我们可以在这3个国家之一
静态最终诠释NONE = 0;
静态最终诠释DRAG = 1;
静态最终诠释ZOOM = 2;
INT模式=无;
布尔isZoomed;//记住一些东西放大
去年的PointF =新的PointF（）;
的PointF开始=新的PointF（）;
浮minScale = 1F;
浮maxScale = 3F;
浮动[]米;
INT viewWidth，viewHeight;
静态最终诠释CLICK = 3;
浮saveScale = 1F;
保护浮球origWidth，origHeight;
INT oldMeasuredWidth，oldMeasuredHeight;
ScaleGestureDetector mScaleDetector;上下文语境;公共TouchImageView（上下文的背景下）{
超级（上下文）;
sharedConstructing（上下文）;
}公共TouchImageView（上下文的背景下，ATTRS的AttributeSet）{
超（背景下，ATTRS）;
sharedConstructing（上下文）;
}
公众持股量getSaveScale（）{
返回saveScale;
}私人无效sharedConstructing（上下文的背景下）{
super.setClickable（真）;
this.context =背景;
mScaleDetector =新ScaleGestureDetector（上下文，新ScaleListener（））;
矩阵=新的Matrix（）;
M =新的浮动[9];
setImageMatrix（矩阵）;
setScaleType（ScaleType.MATRIX）; setOnTouchListener（新OnTouchListener（）{ @覆盖
公共布尔onTouch（视图V，MotionEvent事件）{
布尔defaultResult = v.onTouchEvent（事件）;
mScaleDetector.onTouchEvent（事件）;
的PointF CURR =新的PointF（event.getX（），event.getY（））; 开关（event.getAction（））{
案例MotionEvent.ACTION_DOWN：
last.set（CURR）;
start.set（最后）;
模式= DRAG;
打破; 案例MotionEvent.ACTION_MOVE：
如果（==模式拖动）{
浮DELTAX = curr.x - last.x;
浮DELTAY = curr.y - last.y;
浮fixTransX = getFixDragTrans（DELTAX，viewWidth，origWidth * saveScale）;
浮fixTransY = getFixDragTrans（DELTAY，viewHeight，origHeight * saveScale）;
matrix.postTranslate（fixTransX，fixTransY）;
fixTrans（）;
last.set（curr.x，curr.y）;
}
打破; 案例MotionEvent.ACTION_UP：
模式=无;
INT xDiff =（INT）Math.abs（curr.x - start.x）;
INT yDiff =（INT）Math.abs（curr.y - start.y）;
如果（xDiff＆LT;单击＆放大器;＆安培; yDiff＆LT;点击）
performClick（）;
打破; 案例MotionEvent.ACTION_POINTER_UP：
模式=无;
打破;
默认：
返回defaultResult;
} setImageMatrix（矩阵）;
无效（）;
返回true; //表示事件已处理
}
}）;
}公共无效setMaxZoom（浮X）{
maxScale = X;
}
公众持股量getMaxScale（）{
返回maxScale;
}
//复位图像
公共无效resetZoom（）
{
矩阵=新的Matrix（）;
saveScale = 1F;
matrix.setScale（1F，1F）;
setImageMatrix（矩阵）;
无效（）;
}私有类ScaleListener扩展ScaleGestureDetector.SimpleOnScaleGestureListener { @覆盖
公共布尔onScaleBegin（ScaleGestureDetector检测器）{
isZoomed = TRUE;
模式= ZOOM;
返回true;
}
@覆盖
公共布尔onScale（ScaleGestureDetector检测器）{
浮mScaleFactor = detector.getScaleFactor（）;
浮origScale = saveScale;
saveScale * = mScaleFactor;
如果（saveScale＆GT; maxScale）{
saveScale = maxScale;
mScaleFactor = maxScale / origScale;
}否则如果（saveScale＆LT; minScale）{
saveScale = minScale;
mScaleFactor = minScale / origScale;
} 如果（origWidth * saveScale＆LT; = || viewWidth * origHeight＆saveScale LT = viewHeight）
matrix.postScale（mScaleFactor，mScaleFactor，viewWidth / 2，viewHeight / 2）;
其他
matrix.postScale（mScaleFactor，mScaleFactor，detector.getFocusX（），detector.getFocusY（））; fixTrans（）;
返回true;
}
@覆盖
公共无效onScaleEnd（ScaleGestureDetector检测器）{
// TODO自动生成方法存根
isZoomed = FALSE;
super.onScaleEnd（探测器）;
}
}
公共布尔isZoomed（）{
返回isZoomed;
}公共无效setZoomed（布尔isZoomed）{
this.isZoomed = isZoomed;
}无效fixTrans（）{
matrix.getValues（米）;
浮transX = M [Matrix.MTRANS_X]
浮transY = M [Matrix.MTRANS_Y] 浮fixTransX = getFixTrans（transX，viewWidth，origWidth * saveScale）;
浮fixTransY = getFixTrans（transY，viewHeight，origHeight * saveScale）; 如果（fixTransX！= 0 || fixTransY！= 0）
matrix.postTranslate（fixTransX，fixTransY）;
}浮动getFixTrans（反式浮动，浮动viewSize，浮contentSize）{
浮minTrans，MAXTRANS; 如果（contentSize＆LT; = viewSize）{
minTrans = 0;
MAXTRANS = viewSize - contentSize;
}其他{
minTrans = viewSize - contentSize;
MAXTRANS = 0;
} 如果（反式LT; minTrans）
返回 - 反+ minTrans;
如果（反式GT; MAXTRANS）
返回 - 反+ MAXTRANS;
返回0;
}浮getFixDragTrans（浮动三角洲，浮viewSize，浮contentSize）{
如果（contentSize＆LT; = viewSize）{
返回0;
}
返回三角洲;
}@覆盖
保护无效onMeasure（INT widthMeasureSpec，诠释heightMeasureSpec）{
super.onMeasure（widthMeasureSpec，heightMeasureSpec）;
viewWidth = MeasureSpec.getSize（widthMeasureSpec）;
viewHeight = MeasureSpec.getSize（heightMeasureSpec）; //
//在重新缩放旋转图片
//
如果（oldMeasuredHeight == viewWidth＆放大器;＆安培; oldMeasuredHeight == viewHeight
|| viewWidth == 0 || viewHeight == 0）
返回;
oldMeasuredHeight = viewHeight;
oldMeasuredWidth = viewWidth; 如果（saveScale == 1）{
//适应屏幕。
浮规模; 可绘制可绘制= getDrawable（）;
如果（绘== NULL || drawable.getIntrinsicWidth（）== 0 || drawable.getIntrinsicHeight（）== 0）
返回;
INT bmWidth = drawable.getIntrinsicWidth（）;
INT bmHeight = drawable.getIntrinsicHeight（）; Log.d（bmSize，bmWidth：+ bmWidth +bmHeight：+ bmHeight）; 漂浮的scaleX =（浮点）viewWidth /（浮点）bmWidth;
漂浮的scaleY =（浮点）viewHeight /（浮点）bmHeight;
规模= Math.min（将scaleX，的scaleY）;
matrix.setScale（秤，秤）; //中心图像
浮动redundantYSpace =（浮点）viewHeight - （*规模（浮点）bmHeight）;
浮动redundantXSpace =（浮点）viewWidth - （*规模（浮点）bmWidth）;
redundantYSpace / =（浮点）2;
redundantXSpace / =（浮点）2; matrix.postTranslate（redundantXSpace，redundantYSpace）; origWidth = viewWidth - 2 * redundantXSpace;
origHeight = viewHeight - 2 * redundantYSpace;
setImageMatrix（矩阵）;
}
fixTrans（）;
}
}
在viewPagerAdapter： 在ViewPagerAdapter类： LoopViewPager pagerSelector;
最后TouchImageView prodImage =（TouchImageView）ItemView控件
.findViewById（R.id.product_image）; pagerSelector.setOnPageChangeListener（新OnPageChangeListener（）{ @覆盖
公共无效使用onPageSelected（INT位置）{
如果（pagerSelector！= NULL）{
prodImage.resetZoom（）; //当页面选择，复位变焦但没有奏效。
}
}
} @覆盖
公共无效onPageScrolled（INT为arg0，ARG1浮球，诠释ARG2）{
} @覆盖
公共无效onPageScrollStateChanged（INT为arg0）{ }
}）;
解决方案
找到解决方案：
在上面的类ViewPagerAdapter我用这个..
SparseArray＆LT; TouchImageView＆GT;意见=新SparseArray＆LT; TouchImageView＆GT;（）; //声明这个.. @覆盖
公共无效notifyDataSetChanged（）{
INT键= 0;
的for（int i = 0; I＆LT; views.size（）;我++）{
键= views.keyAt（I）
TouchImageView视图= views.get（键）;
view.resetZoom（）; //自定义的ImageView方法重置这里声明变焦。 }
super.notifyDataSetChanged（）;
}
I am using view pager where i am getting images from services. Problem is when i zoom image and swipe next image and then go to previous image, that previous image is still in zoom view. How to reset to original position.
I checked lots in resource including Chrisbanes photoview library. but nothing provided me solution. How to resolve this?
Please provide me a solution for this.
Thanks in advance.
My code is as follows:
Custom TouchView been used.
public class TouchImageView extends ImageView {
Matrix matrix;
// We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
boolean isZoomed;
// Remember some things for zooming
PointF last = new PointF();
PointF start = new PointF();
float minScale = 1f;
float maxScale = 3f;
float[] m;
int viewWidth, viewHeight;
static final int CLICK = 3;
float saveScale = 1f;
protected float origWidth, origHeight;
int oldMeasuredWidth, oldMeasuredHeight;
ScaleGestureDetector mScaleDetector;
Context context;
public TouchImageView(Context context) {
super(context);
sharedConstructing(context);
}
public TouchImageView(Context context, AttributeSet attrs) {
super(context, attrs);
sharedConstructing(context);
}
public float getSaveScale() {
return saveScale;
}
private void sharedConstructing(Context context) {
super.setClickable(true);
this.context = context;
mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
matrix = new Matrix();
m = new float[9];
setImageMatrix(matrix);
setScaleType(ScaleType.MATRIX);
setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
boolean defaultResult = v.onTouchEvent(event);
mScaleDetector.onTouchEvent(event);
PointF curr = new PointF(event.getX(), event.getY());
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
last.set(curr);
start.set(last);
mode = DRAG;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
float deltaX = curr.x - last.x;
float deltaY = curr.y - last.y;
float fixTransX = getFixDragTrans(deltaX, viewWidth, origWidth * saveScale);
float fixTransY = getFixDragTrans(deltaY, viewHeight, origHeight * saveScale);
matrix.postTranslate(fixTransX, fixTransY);
fixTrans();
last.set(curr.x, curr.y);
}
break;
case MotionEvent.ACTION_UP:
mode = NONE;
int xDiff = (int) Math.abs(curr.x - start.x);
int yDiff = (int) Math.abs(curr.y - start.y);
if (xDiff < CLICK && yDiff < CLICK)
performClick();
break;
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
default:
return defaultResult;
}
setImageMatrix(matrix);
invalidate();
return true; // indicate event was handled
}
});
}
public void setMaxZoom(float x) {
maxScale = x;
}
public float getMaxScale() {
return maxScale;
}
//reset image
public void resetZoom()
{
matrix = new Matrix();
saveScale = 1f;
matrix.setScale(1f, 1f);
setImageMatrix(matrix);
invalidate();
}
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
isZoomed=true;
mode = ZOOM;
return true;
}
@Override
public boolean onScale(ScaleGestureDetector detector) {
float mScaleFactor = detector.getScaleFactor();
float origScale = saveScale;
saveScale *= mScaleFactor;
if (saveScale > maxScale) {
saveScale = maxScale;
mScaleFactor = maxScale / origScale;
} else if (saveScale < minScale) {
saveScale = minScale;
mScaleFactor = minScale / origScale;
}
if (origWidth * saveScale <= viewWidth || origHeight * saveScale <= viewHeight)
matrix.postScale(mScaleFactor, mScaleFactor, viewWidth / 2, viewHeight / 2);
else
matrix.postScale(mScaleFactor, mScaleFactor, detector.getFocusX(), detector.getFocusY());
fixTrans();
return true;
}
@Override
public void onScaleEnd(ScaleGestureDetector detector) {
// TODO Auto-generated method stub
isZoomed = false;
super.onScaleEnd(detector);
}
}
public boolean isZoomed() {
return isZoomed;
}
public void setZoomed(boolean isZoomed) {
this.isZoomed = isZoomed;
}
void fixTrans() {
matrix.getValues(m);
float transX = m[Matrix.MTRANS_X];
float transY = m[Matrix.MTRANS_Y];
float fixTransX = getFixTrans(transX, viewWidth, origWidth * saveScale);
float fixTransY = getFixTrans(transY, viewHeight, origHeight * saveScale);
if (fixTransX != 0 || fixTransY != 0)
matrix.postTranslate(fixTransX, fixTransY);
}
float getFixTrans(float trans, float viewSize, float contentSize) {
float minTrans, maxTrans;
if (contentSize <= viewSize) {
minTrans = 0;
maxTrans = viewSize - contentSize;
} else {
minTrans = viewSize - contentSize;
maxTrans = 0;
}
if (trans < minTrans)
return -trans + minTrans;
if (trans > maxTrans)
return -trans + maxTrans;
return 0;
}
float getFixDragTrans(float delta, float viewSize, float contentSize) {
if (contentSize <= viewSize) {
return 0;
}
return delta;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
viewWidth = MeasureSpec.getSize(widthMeasureSpec);
viewHeight = MeasureSpec.getSize(heightMeasureSpec);
//
// Rescales image on rotation
//
if (oldMeasuredHeight == viewWidth && oldMeasuredHeight == viewHeight
|| viewWidth == 0 || viewHeight == 0)
return;
oldMeasuredHeight = viewHeight;
oldMeasuredWidth = viewWidth;
if (saveScale == 1) {
//Fit to screen.
float scale;
Drawable drawable = getDrawable();
if (drawable == null || drawable.getIntrinsicWidth() == 0 || drawable.getIntrinsicHeight() == 0)
return;
int bmWidth = drawable.getIntrinsicWidth();
int bmHeight = drawable.getIntrinsicHeight();
Log.d("bmSize", "bmWidth: " + bmWidth + " bmHeight : " + bmHeight);
float scaleX = (float) viewWidth / (float) bmWidth;
float scaleY = (float) viewHeight / (float) bmHeight;
scale = Math.min(scaleX, scaleY);
matrix.setScale(scale, scale);
// Center the image
float redundantYSpace = (float) viewHeight - (scale * (float) bmHeight);
float redundantXSpace = (float) viewWidth - (scale * (float) bmWidth);
redundantYSpace /= (float) 2;
redundantXSpace /= (float) 2;
matrix.postTranslate(redundantXSpace, redundantYSpace);
origWidth = viewWidth - 2 * redundantXSpace;
origHeight = viewHeight - 2 * redundantYSpace;
setImageMatrix(matrix);
}
fixTrans();
}
}
In viewPagerAdapter:
In ViewPagerAdapter class:
LoopViewPager pagerSelector;
final TouchImageView prodImage = (TouchImageView) itemView
.findViewById(R.id.product_image);
pagerSelector.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
if(pagerSelector!=null){
prodImage.resetZoom(); // while page selection, reset the zoom but this not worked.
}
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
解决方案
Found solution:
In the above class ViewPagerAdapter I used this..
SparseArray<TouchImageView> views = new SparseArray<TouchImageView>(); //declare this..
@Override
public void notifyDataSetChanged() {
int key = 0;
for(int i = 0; i < views.size(); i++) {
key = views.keyAt(i);
TouchImageView view = views.get(key);
view.resetZoom(); //in custom imageview method to reset zoom declared here.
}
super.notifyDataSetChanged();
}
这篇关于如何ImageView的重置鉴于寻呼机原来的位置？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
