ImageView的缩放不工作 [英] ImageView zooming is not working
本文介绍了ImageView的缩放不工作的处理方法,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
我有一个ImageView的放大应用程序运行在我的手机,当我第一次运行时,图像的工作和缩放好了,在那之后,我做了一个链接按钮,图像视图,用同样的previous应用的形象出现,但没有放大它,它不会在所有的移动
有人能帮助?
mapslocations.xml
<按钮
机器人:ID =@ + ID / pslook1
机器人:layout_width =FILL_PARENT
机器人:layout_height =45dp
机器人:layout_alignParentRight =真
机器人:layout_alignParentTop =真
机器人:layout_weight =1
机器人:比重=中心
机器人:文字=地图
机器人:TEXTSIZE =10SP
机器人:TEXTSTYLE =斜体/>
Sites.java
包com.f.fa;进口android.annotation.Sup pressLint;
进口android.app.Activity;
进口android.graphics.Matrix;
进口android.graphics.PointF;
进口android.os.Bundle;
进口android.util.FloatMath;
进口android.view.MotionEvent;
进口android.view.View;
进口android.widget.ImageView;公共类站点延伸活动{
ImageView的imageDetail1;
字模=新的Matrix();
矩阵savedMatrix =新的Matrix();
的PointF的startPoint =新的PointF();
的PointF中点=新的PointF();
浮oldDist = 1F;
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; / **当第一次创建活动调用。 * /
@覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.mapslocations);
imageDetail1 =(ImageView的)findViewById(R.id.pslook1);
/ **
*对图像的触摸听者设置
* /
imageDetail1.setOnTouchListener(新View.OnTouchListener(){ @覆盖
公共布尔onTouch(视图V,MotionEvent事件){ ImageView的观点=(ImageView的)V;
的System.out.println(矩阵=+ savedMatrix.toString());
开关(event.getAction()及MotionEvent.ACTION_MASK){
案例MotionEvent.ACTION_DOWN: savedMatrix.set(矩阵);
startPoint.set(event.getX(),event.getY());
模式= DRAG;
打破; 案例MotionEvent.ACTION_POINTER_DOWN: oldDist =间距(事件); 如果(oldDist> 10F){
savedMatrix.set(矩阵);
中点(中点,事件);
模式= ZOOM;
}
打破; 案例MotionEvent.ACTION_UP: 案例MotionEvent.ACTION_POINTER_UP:
模式=无; 打破; 案例MotionEvent.ACTION_MOVE:
如果(==模式拖动){
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - startPoint.x,
event.getY() - startPoint.y);
}否则如果(==模式ZOOM){
浮newDist =间距(事件);
如果(newDist> 10F){
matrix.set(savedMatrix);
浮规模= newDist / oldDist;
matrix.postScale(规模化,规模化,midPoint.x,midPoint.y);
}
}
打破; }
view.setImageMatrix(矩阵); 返回true;
} @燮pressLint(FloatMath)
私人浮动间距(MotionEvent事件){
浮X = event.getX(0) - event.getX(1);
浮Y = event.getY(0) - event.getY(1);
返回FloatMath.sqrt(X * X + Y * Y);
}
私人无效中点(点的PointF,MotionEvent事件){
浮X = event.getX(0)+ event.getX(1);
浮Y = event.getY(0)+ event.getY(1);
point.set(X / 2,Y / 2);
}
});
}
}
imageview1.xml
< ImageView的
机器人:ID =@ + ID / pslook1
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT
机器人:scaleType =黑客帝国
机器人:SRC =@绘制/ powerstationwallmap/>
PagePowerstation.java
包com.f.fa;进口android.app.Activity;
进口android.os.Bundle;
进口android.widget.Button;公共类PagePowerstation延伸活动{ 按钮imageview1; @覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
的setContentView(R.layout.imageview1);
}
}
解决方案
试试这个定制 TouchImageView
:
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; //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);
} / * * /
私人无效stopInterceptEvent()
{
。的getParent()requestDisallowInterceptTouchEvent(真);
} 私人无效startInterceptEvent()
{
。的getParent()requestDisallowInterceptTouchEvent(假);
} 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){
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;
stopInterceptEvent();
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); 浮transX = M [Matrix.MTRANS_X] 如果((INT)(getFixTrans(transX,viewWidth,origWidth * saveScale)+ fixTransX)== 0)
startInterceptEvent();
其他
stopInterceptEvent();
}
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<单击&放大器;&安培; yDiff<点击)
performClick();
startInterceptEvent();
打破; 案例MotionEvent.ACTION_POINTER_UP:
模式=无;
打破;
} setImageMatrix(矩阵);
无效();
返回true; //表示事件已处理
} });
} 公共无效setMaxZoom(浮X){
maxScale = X;
} 私有类ScaleListener扩展ScaleGestureDetector.SimpleOnScaleGestureListener {
@覆盖
公共布尔onScaleBegin(ScaleGestureDetector检测器){
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> maxScale){
saveScale = maxScale;
mScaleFactor = maxScale / origScale;
}否则如果(saveScale< minScale){
saveScale = minScale;
mScaleFactor = minScale / origScale;
} 如果(origWidth * saveScale< = || 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;
}
} 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< = 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< = 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();
}
}
使用XML格式:
< your_package_name.TouchImageView
机器人:ID =@ + ID / dialogImageView
机器人:layout_width =FILL_PARENT
机器人:layout_height =FILL_PARENT/>
I have an ImageView zoom application ran on my mobile, when I first run it, the image work and the zooming as well, after that, I made a link button to the image view, with the same previous application, the image appears but no zooming for it and it doesn't move at all
Can someone help?
mapslocations.xml
<Button
android:id="@+id/pslook1"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_weight="1"
android:gravity="center"
android:text="Map"
android:textSize="10sp"
android:textStyle="italic" />
Sites.java
package com.f.fa;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.os.Bundle;
import android.util.FloatMath;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;
public class Sites extends Activity {
ImageView imageDetail1;
Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
PointF startPoint = new PointF();
PointF midPoint = new PointF();
float oldDist = 1f;
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapslocations);
imageDetail1 = (ImageView) findViewById(R.id.pslook1);
/**
* set on touch listner on image
*/
imageDetail1.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
ImageView view = (ImageView) v;
System.out.println("matrix=" + savedMatrix.toString());
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
savedMatrix.set(matrix);
startPoint.set(event.getX(), event.getY());
mode = DRAG;
break;
case MotionEvent.ACTION_POINTER_DOWN:
oldDist = spacing(event);
if (oldDist > 10f) {
savedMatrix.set(matrix);
midPoint(midPoint, event);
mode = ZOOM;
}
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
matrix.set(savedMatrix);
matrix.postTranslate(event.getX() - startPoint.x,
event.getY() - startPoint.y);
} else if (mode == ZOOM) {
float newDist = spacing(event);
if (newDist > 10f) {
matrix.set(savedMatrix);
float scale = newDist / oldDist;
matrix.postScale(scale, scale, midPoint.x, midPoint.y);
}
}
break;
}
view.setImageMatrix(matrix);
return true;
}
@SuppressLint("FloatMath")
private float spacing(MotionEvent event) {
float x = event.getX(0) - event.getX(1);
float y = event.getY(0) - event.getY(1);
return FloatMath.sqrt(x * x + y * y);
}
private void midPoint(PointF point, MotionEvent event) {
float x = event.getX(0) + event.getX(1);
float y = event.getY(0) + event.getY(1);
point.set(x / 2, y / 2);
}
});
}
}
imageview1.xml
<ImageView
android:id="@+id/pslook1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="matrix"
android:src="@drawable/powerstationwallmap" />
PagePowerstation.java
package com.f.fa;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
public class PagePowerstation extends Activity {
Button imageview1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.imageview1);
}
}
解决方案
Try this custom TouchImageView
:
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;
// 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);
}
/* */
private void stopInterceptEvent()
{
getParent().requestDisallowInterceptTouchEvent(true);
}
private void startInterceptEvent()
{
getParent().requestDisallowInterceptTouchEvent(false);
}
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) {
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;
stopInterceptEvent();
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);
float transX = m[Matrix.MTRANS_X];
if((int) (getFixTrans(transX, viewWidth, origWidth * saveScale) + fixTransX) == 0)
startInterceptEvent();
else
stopInterceptEvent();
}
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();
startInterceptEvent();
break;
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
}
setImageMatrix(matrix);
invalidate();
return true; // indicate event was handled
}
});
}
public void setMaxZoom(float x) {
maxScale = x;
}
private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
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;
}
}
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();
}
}
Use in XML:
<your_package_name.TouchImageView
android:id="@+id/dialogImageView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
这篇关于ImageView的缩放不工作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