Android 仿朋友圈之多图显示(一)

一：效果

 

 

 

 

1.MultiImageView ：

import android.content.Context;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;

import com.bumptech.glide.Glide;
import com.lvfq.library.utils.LvDPUtil;

import java.util.List;

/**
 * @author sgf
 * @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 = LvDPUtil.dip2px(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) {
            // 如果需要两张和四张图横向铺满，
//            if (lists.size() == 2 || lists.size() == 4) {
//                pxMoreWandH = (MAX_WIDTH - pxImagePadding) / 2;
//            } else {
            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;  // 一张图的时候，图片宽度
            initImageLayoutParams();
        }

        initView();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (MAX_WIDTH == 0) {
            int width = measureWidth(widthMeasureSpec);
            if (width > 0) {
                MAX_WIDTH = width - getPaddingLeft() - getPaddingRight();
                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(pxOneMaxWandH, 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(final int position, final boolean isMultiImage) {
        String url = "";
        if (!TextUtils.isEmpty(imagesList.get(position))) {
            url = imagesList.get(position);
        }

        ImageView imageView = new ColorFilterImageView(getContext());
        if (isMultiImage) {
            imageView.setScaleType(ScaleType.CENTER_CROP);
            imageView.setLayoutParams(position % MAX_PER_ROW_COUNT == 0 ? moreParaColumnFirst : morePara);
        } else {
            imageView.setAdjustViewBounds(true);
            imageView.setScaleType(ScaleType.FIT_START);
            imageView.setMaxHeight(pxOneMaxWandH);
            imageView.setLayoutParams(onePicPara);
        }

        imageView.setId(url.hashCode());
        imageView.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mOnItemClickListener != null) {
                    mOnItemClickListener.onItemClick(v, position);
                }
            }
        });
        // TODO: 2016/10/18 之后设置网络图片
        Glide.with(getContext()).load(url).into(imageView);
        return imageView;
    }

    public interface OnItemClickListener {
        void onItemClick(View view, int position);
    }
}

2.添加依赖包：

 implementation 'com.lfq:AndroidUtils:1.1.6'

3.带有阴影的ImageView ：

import android.content.Context;
import android.graphics.Color;
import android.graphics.PorterDuff.Mode;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ImageView;

/**
 * @author sgf
 * @ClassName: ColorFilterImageView
 * @Description: 实现图像根据按下抬起动作变化颜色
 */
public class ColorFilterImageView extends ImageView implements OnTouchListener {
    public ColorFilterImageView(Context context) {
        this(context, null, 0);
    }

    public ColorFilterImageView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public ColorFilterImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:  // 按下时图像变灰
                setColorFilter(Color.GRAY, Mode.MULTIPLY);
                break;
            case MotionEvent.ACTION_UP:   // 手指离开或取消操作时恢复原色
            case MotionEvent.ACTION_CANCEL:
                setColorFilter(Color.TRANSPARENT);
                break;
            default:
                break;
        }
        return false;
    }
}

4.布局：

5.实现：

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.FragmentActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

/**
 * ImageActivity 
 *
 * @author sgf
 */

public class ImageActivity extends FragmentActivity {

    RecyclerView recyclerView;
    CommonAdapter mAdapter;
    List mList = new ArrayList<>();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_dynamic_image);

        recyclerView = LvV.find(this, R.id.recyclerView);
        mList = Data.getImgs(9);

        initAdapter();

        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(mAdapter);

    }

    private void initAdapter() {
        mAdapter = new CommonAdapter(this, R.layout.item_dynamic_image, mList) {
            @Override
            protected void convert(ViewHolder holder, String s, int position) {
                MultiImageView multiImage = holder.getView(R.id.multi_image);
                holder.setText(R.id.tv_title, (position + 1) + "张图");
                multiImage.setList(Data.getImgs(position + 1));
                final int pos = position;
                multiImage.setOnItemClickListener(new MultiImageView.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        LvToastUtil.showToast((Activity) mContext, "position1:" + pos + " , position2:" + position);
                    }
                });
            }
        };

    }
}

multiImageView.setList(imgs);   // List 类型的图片地址列表
multiImage.setOnItemClickListener(new MultiImageView.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                       // To do something or 查看大图.
                    }
                });

二：效果：

 

1.MultiImageView

用法类似：

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;

import com.bumptech.glide.Glide;

import java.util.List;

/**
 * @author sgf
 * @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 pxOneWidth = DensityUtil.dip2px(getContext(), 200); // 单张图时候的宽
    private int pxOneHeight = DensityUtil.dip2px(getContext(), 150); // 单张图时候的高
    private int pxMoreWandH = 0; // 多张图的宽高
    private int pxImagePadding = DensityUtil.dip2px(getContext(), 2);// 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;
    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 / 3 - pxImagePadding;
            // pxOneWidth = MAX_WIDTH / 2;
            // pxOneHeight = 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);
    }

    /**
     * @param measureSpec
     * @return 返回View的宽度
     */
    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() {

        onePicPara = new LayoutParams(pxOneWidth, pxOneHeight);

        morePara = new LayoutParams(pxMoreWandH, pxMoreWandH);
        morePara.setMargins(0, 0, pxImagePadding, 0);

        int wrap = LayoutParams.WRAP_CONTENT;
        int match = LayoutParams.MATCH_PARENT;
        rowPara = new LayoutParams(match, wrap);
        rowPara.setMargins(0, 0, 0, pxImagePadding);
    }

    // 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) {
            for (final String url : imagesList) {
                final ImageView imageView = new ImageView(getContext());
                imageView.setId(url.hashCode()); // 指定id
                imageView.setLayoutParams(onePicPara);
                imageView.setMinimumWidth(pxMoreWandH);
                imageView.setScaleType(ScaleType.CENTER_CROP);

                Glide.with(getContext()).load(url).into(imageView);

                imageView.setOnClickListener(mImageViewOnClickListener);
                addView(imageView);
            }

        } 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;
                    String thumbUrl = imagesList.get(position);

                    final ImageView imageView = new ImageView(getContext());
                    imageView.setId(thumbUrl.hashCode());// 指定id
                    imageView.setLayoutParams(morePara);
                    imageView.setScaleType(ScaleType.CENTER_CROP);
                    imageView.setTag(R.string.app_name, position);
                    Glide.with(getContext()).load(thumbUrl).into(imageView);

                    imageView.setOnClickListener(mImageViewOnClickListener);
                    rowLayout.addView(imageView);
                }
            }
        }
    }

    // 图片点击事件
    private View.OnClickListener mImageViewOnClickListener = new OnClickListener() {

        @Override
        public void onClick(View view) {
            if (mOnItemClickListener != null) {
                mOnItemClickListener.onItemClick(view, view.getTag() + "");
            }
        }
    };

    public interface OnItemClickListener {
        void onItemClick(View view, String position);
    }

}

2.DensityUtil

import android.content.Context;
import android.util.DisplayMetrics;

/**
 * Created by sgf
 */

public class DensityUtil {

    public static int dip2px(Context context, float dpValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    public static int px2dip(Context context, float pxValue) {
        final float scale = context.getResources().getDisplayMetrics().density;
        return (int) (pxValue / scale + 0.5f);
    }

    /**
     * 获取手机的密度
     */
    public static float getDensity(Context context) {
        DisplayMetrics dm = context.getResources().getDisplayMetrics();
        return dm.density;
    }
}

3.布局：

4.适配器：

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.support.v4.graphics.drawable.RoundedBitmapDrawable;
import android.support.v4.graphics.drawable.RoundedBitmapDrawableFactory;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.request.target.BitmapImageViewTarget;
import com.example.donghe.wxfriend.MultiImageView;
import com.example.donghe.wxfriend.R;
import com.example.donghe.wxfriend.activity.GalleryActivity;
import com.example.donghe.wxfriend.bean.ListItemModle;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by sgf
 */

public class MyRecycleViewAdapter extends RecyclerView.Adapter {

    private Context mContext;
    private List list;
    private LayoutInflater mInflater;
    private ArrayList images;

    public MyRecycleViewAdapter(Context mContext) {

        this.mContext = mContext;
        mInflater = LayoutInflater.from(mContext);
    }

    public void setList(List list) {
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        final View view = LayoutInflater.from(mContext).inflate(R.layout.list_item_layout, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int pos) {

        final ViewHolder viewHolder = (ViewHolder) holder;
        final ListItemModle itemModle = list.get(pos);

        holder.itemView.setTag(pos);
        viewHolder.tvContent.setText(itemModle.getContent());
        Glide.with(mContext).load(itemModle.getHeadImg())
                .asBitmap()
                .centerCrop()
                .diskCacheStrategy(DiskCacheStrategy.ALL)
                .into(new BitmapImageViewTarget(viewHolder.ivHead) {
                    @Override
                    protected void setResource(Bitmap resource) {
                        RoundedBitmapDrawable rounde = RoundedBitmapDrawableFactory.create(mContext.getResources(), resource);
                        rounde.setCircular(true);
                        //要实现圆角，只需要加上这句
                        rounde.setCornerRadius(100L);
                        viewHolder.ivHead.setImageDrawable(rounde);
                    }
                });

        viewHolder.tvName.setText(itemModle.getName());
        if (itemModle != null && itemModle.getUrls().size() > 0) {
            viewHolder.gridView.setVisibility(View.VISIBLE);
            viewHolder.gridView.setList(itemModle.getUrls());

            viewHolder.gridView.setOnItemClickListener(new MultiImageView.OnItemClickListener() {
                @Override
                public void onItemClick(View view, String position) {
                    addPic(itemModle);
                    Intent intent = new Intent(mContext, GalleryActivity.class);
                    intent.putStringArrayListExtra("imagePath", images);
                    intent.putExtra("position", position);
                    mContext.startActivity(intent);
                }
            });
        } else {
            viewHolder.gridView.setVisibility(View.GONE);
        }
    }

    @Override
    public int getItemCount() {
        return list.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {

        TextView tvName;
        ImageView ivHead;
        TextView tvContent;
        MultiImageView gridView;

        public ViewHolder(View itemView) {
            super(itemView);
            ivHead = (ImageView) itemView.findViewById(R.id.iv_head);
            tvName = (TextView) itemView.findViewById(R.id.tv_username);
            tvContent = (TextView) itemView.findViewById(R.id.tv_content);
            gridView = (MultiImageView) itemView.findViewById(R.id.gridview);
        }
    }

    private void addPic(final ListItemModle item) {
        if (images == null) {
            images = new ArrayList<>();
        } else {
            images.clear();
        }
        images.addAll(item.getUrls());
    }

}

可参考案例1

可参考案例2

九宫格案例