android水平柱状图view

package com.baidu.baidumaps.track.widget; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import com.baidu.BaiduMap.R; import com.baidu.baidumaps.common.util.ScreenUtils; import java.util.ArrayList; /** * 导航信息统计柱状图 * @author ouyangkun * */ public class HistogramView extends LinearLayout { /** * 内部使用的分区数据结构 */ public static class Item { public int walkDistance; public int carDistance; public int month; public Item(int month, int walkDistance, int carDistance) { this.month = month; this.walkDistance = walkDistance; this.carDistance = carDistance; } @Override public String toString() { return "Item{" + "walkDistance=" + walkDistance + ", carDistance=" + carDistance + ", month=" + month + '}'; } } private LayoutInflater mInflater; private Context mContext; public final static int ITEM_MAX_WIDTH = 350; public final static int ITEM_HEIGHT = 25; public HistogramView(Context context) { super(context); init(context); } public HistogramView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } private void init(Context context) { mContext = context; mInflater = LayoutInflater.from(context); } public void setHistogramItems(ArrayList<Item> items){ Log.e("tag", "items="+items); if(items == null) { return; } float max = getMaxDistance(items); Log.e("tag", "max="+max); for (int i = 0; i < items.size(); i++){ LinearLayout view = (LinearLayout) mInflater.inflate(R.layout.track_navi_histogram_item, this, false); TextView tvMonth = (TextView)view.findViewById(R.id.tv_month); TextView tvCarDistance = (TextView)view.findViewById(R.id.tv_car_distance); TextView tvWalkDistance = (TextView)view.findViewById(R.id.tv_walk_distance); Item item = items.get(i); tvMonth.setText(item.month + "月"); tvCarDistance.setText(item.carDistance + ""); tvWalkDistance.setText(item.walkDistance + ""); tvCarDistance.setWidth(30); float carRatio = item.carDistance / max; LayoutParams carParams = new LayoutParams((int)(ITEM_MAX_WIDTH * carRatio), ITEM_HEIGHT); tvCarDistance.setLayoutParams(carParams); float walkRatio = item.walkDistance / max; LayoutParams walkParams = new LayoutParams((int)(ITEM_MAX_WIDTH * walkRatio), ITEM_HEIGHT); tvWalkDistance.setLayoutParams(walkParams); addView(view); } //底部横线布局 LinearLayout linearLayout = new LinearLayout(mContext); LayoutParams linearLayoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT); linearLayoutParams.topMargin = -ScreenUtils.dip2px(10, mContext); linearLayout.setOrientation(LinearLayout.HORIZONTAL); linearLayout.setLayoutParams(linearLayoutParams); //横线 ImageView imageView = new ImageView(mContext); LayoutParams imageParams = new LayoutParams(ITEM_MAX_WIDTH+10, ScreenUtils.dip2px(1, mContext)); imageParams.leftMargin = ScreenUtils.dip2px(30, mContext); imageParams.gravity = Gravity.CENTER_VERTICAL; imageView.setLayoutParams(imageParams); imageView.setBackgroundColor(mContext.getResources().getColor(R.color.track_histogram_frame)); linearLayout.addView(imageView); //文本km TextView textView = new TextView(mContext); LayoutParams textViewParams = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); textViewParams.leftMargin = ScreenUtils.dip2px(5, mContext); textView.setText("km"); textView.setLayoutParams(textViewParams); linearLayout.addView(textView); addView(linearLayout); } private float getMaxDistance(ArrayList<Item> items){ if(items == null) { return 0; } float max = 0; for (int i = 0; i < items.size(); i++){ Item item = items.get(i); float temp = item.walkDistance + item.carDistance; if(temp > max){ max = temp; } } return max; } }