本文共 7893 字，大约阅读时间需要 26 分钟。

这是一个很方便的自定义图片显示控件，只需要把图片的Url放在数组传给控件就可。加载逻辑和显示逻辑都做了相应的封装。

看看例子。

直接粘出控件源码

package com.raspberry.library.view;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;import com.bumptech.glide.Glide;import com.bumptech.glide.load.engine.DiskCacheStrategy;import com.raspberry.library.util.DisplayUtils;import java.util.List;/** * @author shuwen * @ClassName MultiImageView.java * @Description: 显示1~N张图片的View */public class MultiImageView extends LinearLayout {    public static int MAX_WIDTH = 0;    // 照片的Url列表    private List
   
     imagesList;    /**     * 长度 单位为Pixel     **/    private int pxOneMaxWandH;  // 单张图最大允许宽高    private int pxMoreWandH = 0;// 多张图的宽高    private int pxImagePadding = DisplayUtils.dip2px(getContext(), 3);// 图片间的间距    private int MAX_PER_ROW_COUNT = 3;// 每行显示最大数    private LayoutParams onePicPara;    private LayoutParams morePara, moreParaColumnFirst;    private LayoutParams rowPara;    private OnItemClickListener mOnItemClickListener;    public void setOnItemClickListener(OnItemClickListener onItemClickListener) {        mOnItemClickListener = onItemClickListener;    }    public MultiImageView(Context context) {        super(context);    }    public MultiImageView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public void setList(List
    
      lists) throws IllegalArgumentException {        if (lists == null) {            throw new IllegalArgumentException("imageList is null...");        }        imagesList = lists;        if (MAX_WIDTH > 0) {            pxMoreWandH = (MAX_WIDTH - pxImagePadding * 2) / 3; //解决右侧图片和内容对不齐问题            pxOneMaxWandH = MAX_WIDTH * 2 / 3;            initImageLayoutParams();        }        initView();    }    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {        if (MAX_WIDTH == 0) {            int width = measureWidth(widthMeasureSpec);            if (width > 0) {                MAX_WIDTH = width;                if (imagesList != null && imagesList.size() > 0) {                    setList(imagesList);                }            }        }        super.onMeasure(widthMeasureSpec, heightMeasureSpec);    }    /**     * Determines the width of this view     *     * @param measureSpec A measureSpec packed into an int     * @return The width of the view, honoring constraints from measureSpec     */    private int measureWidth(int measureSpec) {        int result = 0;        int specMode = MeasureSpec.getMode(measureSpec);        int specSize = MeasureSpec.getSize(measureSpec);        if (specMode == MeasureSpec.EXACTLY) {            // We were told how big to be            result = specSize;        } else {            // Measure the text            // result = (int) mTextPaint.measureText(mText) + getPaddingLeft()            // + getPaddingRight();            if (specMode == MeasureSpec.AT_MOST) {                // Respect AT_MOST value if that was what is called for by                // measureSpec                result = Math.min(result, specSize);            }        }        return result;    }    private void initImageLayoutParams() {        int wrap = LayoutParams.WRAP_CONTENT;        int match = LayoutParams.MATCH_PARENT;        onePicPara = new LayoutParams(wrap, wrap);        moreParaColumnFirst = new LayoutParams(pxMoreWandH, pxMoreWandH);        morePara = new LayoutParams(pxMoreWandH, pxMoreWandH);        morePara.setMargins(pxImagePadding, 0, 0, 0);        rowPara = new LayoutParams(match, wrap);    }    // 根据imageView的数量初始化不同的View布局,还要为每一个View作点击效果    private void initView() {        this.setOrientation(VERTICAL);        this.removeAllViews();        if (MAX_WIDTH == 0) {            //为了触发onMeasure()来测量MultiImageView的最大宽度，MultiImageView的宽设置为match_parent            addView(new View(getContext()));            return;        }        if (imagesList == null || imagesList.size() == 0) {            return;        }        if (imagesList.size() == 1) {            addView(createImageView(0, false));        } else {            int allCount = imagesList.size();            if (allCount == 4) {                MAX_PER_ROW_COUNT = 2;            } else {                MAX_PER_ROW_COUNT = 3;            }            int rowCount = allCount / MAX_PER_ROW_COUNT + (allCount % MAX_PER_ROW_COUNT > 0 ? 1 : 0);// 行数            for (int rowCursor = 0; rowCursor < rowCount; rowCursor++) {                LinearLayout rowLayout = new LinearLayout(getContext());                rowLayout.setOrientation(LinearLayout.HORIZONTAL);                rowLayout.setLayoutParams(rowPara);                if (rowCursor != 0) {                    rowLayout.setPadding(0, pxImagePadding, 0, 0);                }                int columnCount = allCount % MAX_PER_ROW_COUNT == 0 ? MAX_PER_ROW_COUNT : allCount %                        MAX_PER_ROW_COUNT;//每行的列数                if (rowCursor != rowCount - 1) {                    columnCount = MAX_PER_ROW_COUNT;                }                addView(rowLayout);                int rowOffset = rowCursor * MAX_PER_ROW_COUNT;// 行偏移                for (int columnCursor = 0; columnCursor < columnCount; columnCursor++) {                    int position = columnCursor + rowOffset;                    rowLayout.addView(createImageView(position, true));                }            }        }    }    private ImageView createImageView(int position, final boolean isMultiImage) {        String url = imagesList.get(position);        ImageView imageView = new ColorFilterImageView(getContext());        if (isMultiImage) {            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);            imageView.setLayoutParams(position % MAX_PER_ROW_COUNT == 0 ? moreParaColumnFirst : morePara);        } else {            imageView.setAdjustViewBounds(true);            imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);            imageView.setMaxHeight(pxOneMaxWandH);            imageView.setLayoutParams(onePicPara);        }        imageView.setId(url.hashCode());        imageView.setOnClickListener(new ImageOnClickListener(position));        Glide.with(getContext()).load(url).diskCacheStrategy(DiskCacheStrategy.ALL).into(imageView);        return imageView;    }    private class ImageOnClickListener implements View.OnClickListener {        private int position;        public ImageOnClickListener(int position) {            this.position = position;        }        @Override        public void onClick(View view) {            if (mOnItemClickListener != null) {                mOnItemClickListener.onItemClick(view, position);            }        }    }    public interface OnItemClickListener {        public void onItemClick(View view, int position);    }}
    
   

使用也非常简单，想要了解具体逻辑的，请看源码。xml文件

使用Butterknife注解

@Bind(R.id.patient_detail_table_pictures)    MultiImageView patient_detail_table_pictures;

private List
   
    tableImgs=new ArrayList<>();
   

tableImgs.add("http://p3.so.qhmsg.com/bdr/_240_/t01530591c4a0e6c033.jpg");        tableImgs.add("http://p2.so.qhmsg.com/bdr/_240_/t01ab43c649e752002c.jpg");        tableImgs.add("http://p2.so.qhmsg.com/bdr/_240_/t01dce1c2b41d8e272c.jpg");        tableImgs.add("http://p1.so.qhmsg.com/bdr/_240_/t01974c03c076598946.jpg");        tableImgs.add("http://p0.so.qhmsg.com/bdr/_240_/t0123c14f8d0d2be925.jpg");        tableImgs.add("http://p1.so.qhmsg.com/bdr/_240_/t01938dc3846fae8de1.jpg");        patient_detail_table_pictures.setList(tableImgs);

再加上网络请求权限

如果想要添加点击事件

patient_detail_table_pictures.setOnItemClickListener(new MultiImageView.OnItemClickListener() {            @Override            public void onItemClick(View view, int position) {                //点击图片相应的逻辑处理            }        });

这样就可以实现GridView或者RecyclerView的九宫格图片展示，很方便，快速开发必备！觉得有用给个赞呗~ git项目地址：