android photoview 图片放大缩放功能 ImageView

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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

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

下载完成后导入IDE里面

将lib 添加进来

贴出 photoview的代码：

/******************************************************************************* * 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：

非常方便快捷

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

谢谢大家

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