android photoview 图片放大缩放功能 ImageView

2019年3月17日 939次阅读来源: Dijkstra算法

转自：http://blog.csdn.net/aaawqqq/article/details/43128111

Android 图片浏览功能图片放大缩小

使用 photoview 双击或双指缩放的ImageView

使用多点触控和双击。

滚动，以平滑滚动甩。

github 下载地址： https://github.com/chrisbanes/PhotoView

实际效果参考

《android photoview 图片放大缩放功能 ImageView》

图片来自： http://a.code4app.com/android/PhotoView/5241a4026803fa1327000000

下载完成后导入IDE里面

《android photoview 图片放大缩放功能 ImageView》

将lib 添加进来

《android photoview 图片放大缩放功能 ImageView》

贴出 photoview的代码：

[java]
view plain
copy

/*******************************************************************************
* Copyright 2011, 2012 Chris Banes.
*
* Licensed under the Apache License, Version 2.0 (the “License”);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an “AS IS” BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package uk.co.senab.photoview;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.widget.ImageView;
import uk.co.senab.photoview.PhotoViewAttacher.OnMatrixChangedListener;
import uk.co.senab.photoview.PhotoViewAttacher.OnPhotoTapListener;
import uk.co.senab.photoview.PhotoViewAttacher.OnViewTapListener;
public class PhotoView extends ImageView implements IPhotoView {
private final PhotoViewAttacher mAttacher;
private ScaleType mPendingScaleType;
public PhotoView(Context context) {
this(context, null);
}
public PhotoView(Context context, AttributeSet attr) {
this(context, attr, 0);
}
public PhotoView(Context context, AttributeSet attr, int defStyle) {
super(context, attr, defStyle);
super.setScaleType(ScaleType.MATRIX);
mAttacher = new PhotoViewAttacher(this);
if (null != mPendingScaleType) {
setScaleType(mPendingScaleType);
mPendingScaleType = null;
}
}
/**
* @deprecated use {@link #setRotationTo(float)}
*/
@Override
public void setPhotoViewRotation(float rotationDegree) {
mAttacher.setRotationTo(rotationDegree);
}
@Override
public void setRotationTo(float rotationDegree) {
mAttacher.setRotationTo(rotationDegree);
}
@Override
public void setRotationBy(float rotationDegree) {
mAttacher.setRotationBy(rotationDegree);
}
@Override
public boolean canZoom() {
return mAttacher.canZoom();
}
@Override
public RectF getDisplayRect() {
return mAttacher.getDisplayRect();
}
@Override
public Matrix getDisplayMatrix() {
return mAttacher.getDrawMatrix();
}
@Override
public boolean setDisplayMatrix(Matrix finalRectangle) {
return mAttacher.setDisplayMatrix(finalRectangle);
}
@Override
@Deprecated
public float getMinScale() {
return getMinimumScale();
}
@Override
public float getMinimumScale() {
return mAttacher.getMinimumScale();
}
@Override
@Deprecated
public float getMidScale() {
return getMediumScale();
}
@Override
public float getMediumScale() {
return mAttacher.getMediumScale();
}
@Override
@Deprecated
public float getMaxScale() {
return getMaximumScale();
}
@Override
public float getMaximumScale() {
return mAttacher.getMaximumScale();
}
@Override
public float getScale() {
return mAttacher.getScale();
}
@Override
public ScaleType getScaleType() {
return mAttacher.getScaleType();
}
@Override
public void setAllowParentInterceptOnEdge(boolean allow) {
mAttacher.setAllowParentInterceptOnEdge(allow);
}
@Override
@Deprecated
public void setMinScale(float minScale) {
setMinimumScale(minScale);
}
@Override
public void setMinimumScale(float minimumScale) {
mAttacher.setMinimumScale(minimumScale);
}
@Override
@Deprecated
public void setMidScale(float midScale) {
setMediumScale(midScale);
}
@Override
public void setMediumScale(float mediumScale) {
mAttacher.setMediumScale(mediumScale);
}
@Override
@Deprecated
public void setMaxScale(float maxScale) {
setMaximumScale(maxScale);
}
@Override
public void setMaximumScale(float maximumScale) {
mAttacher.setMaximumScale(maximumScale);
}
@Override
// setImageBitmap calls through to this method
public void setImageDrawable(Drawable drawable) {
super.setImageDrawable(drawable);
if (null != mAttacher) {
mAttacher.update();
}
}
@Override
public void setImageResource(int resId) {
super.setImageResource(resId);
if (null != mAttacher) {
mAttacher.update();
}
}
@Override
public void setImageURI(Uri uri) {
super.setImageURI(uri);
if (null != mAttacher) {
mAttacher.update();
}
}
@Override
public void setOnMatrixChangeListener(OnMatrixChangedListener listener) {
mAttacher.setOnMatrixChangeListener(listener);
}
@Override
public void setOnLongClickListener(OnLongClickListener l) {
mAttacher.setOnLongClickListener(l);
}
@Override
public void setOnPhotoTapListener(OnPhotoTapListener listener) {
mAttacher.setOnPhotoTapListener(listener);
}
@Override
public OnPhotoTapListener getOnPhotoTapListener() {
return mAttacher.getOnPhotoTapListener();
}
@Override
public void setOnViewTapListener(OnViewTapListener listener) {
mAttacher.setOnViewTapListener(listener);
}
@Override
public OnViewTapListener getOnViewTapListener() {
return mAttacher.getOnViewTapListener();
}
@Override
public void setScale(float scale) {
mAttacher.setScale(scale);
}
@Override
public void setScale(float scale, boolean animate) {
mAttacher.setScale(scale, animate);
}
@Override
public void setScale(float scale, float focalX, float focalY, boolean animate) {
mAttacher.setScale(scale, focalX, focalY, animate);
}
@Override
public void setScaleType(ScaleType scaleType) {
if (null != mAttacher) {
mAttacher.setScaleType(scaleType);
} else {
mPendingScaleType = scaleType;
}
}
@Override
public void setZoomable(boolean zoomable) {
mAttacher.setZoomable(zoomable);
}
@Override
public Bitmap getVisibleRectangleBitmap() {
return mAttacher.getVisibleRectangleBitmap();
}
@Override
public void setZoomTransitionDuration(int milliseconds) {
mAttacher.setZoomTransitionDuration(milliseconds);
}
@Override
public IPhotoView getIPhotoViewImplementation() {
return mAttacher;
}
@Override
public void setOnDoubleTapListener(GestureDetector.OnDoubleTapListener newOnDoubleTapListener) {
mAttacher.setOnDoubleTapListener(newOnDoubleTapListener);
}
@Override
protected void onDetachedFromWindow() {
mAttacher.cleanup();
super.onDetachedFromWindow();
}
}

接下来将lib 导入自己的项目中使用

在自己的项目中使用只需要在 xml 文件里面将原有的imageview 替换为 uk.co.senab.photoview.PhotoView

就能使用

如图：

《android photoview 图片放大缩放功能 ImageView》

非常方便快捷

github 下载地址： https://github.com/chrisbanes/PhotoView

谢谢大家

    原文作者：Dijkstra算法
    原文地址: https://blog.csdn.net/bsmmaoshenbo/article/details/64121860
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