项目中最近用到各种图表，本来打算用第三方的，例如MPAndroid,这是一个十分强大的图表库，应用起来十分方便，但是最终发现和设计不太一样，没办法，只能自己写了。今天将写好的柱状图的demo贴在这，该柱状图可根据数据的功能有一下几点：
1. 根据数据的多少，动态的绘制柱状图柱子的条数；
2. 柱状图每条柱子的绘制都有动态的动画效果；
3. 每条柱子有点击事件，点击时弹出提示框，显示相关信息，规定时间后，弹窗自动消失。
好了，先上演示图：
下边贴出相关代码：
自定义柱状图类：
package com.example.histogram;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.Handler;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import com.example.histogram.UI.UI;
import java.text.NumberFormat;
public class HistoGram extends View implements Runnable {
private Handler handler = new Handler(); // 用于延时更新，实现动画
private float animHeight; // 进度条动画高度
private Paint axisLinePaint; // 坐标轴画笔
private Paint hLinePaint; // 内部水平虚线画笔
private Paint textPaint; // 绘制文本的画笔
private Paint recPaint; // 绘制柱状图阴影背景的画笔
private Paint dataPaint; // 绘制柱状图的画笔
private Paint textPaint2; // 绘制白色文本的画笔
private Paint textPaint3; // 绘制坐标的画笔
private Paint textPaint4; // 绘制x轴上的白色竖线的画笔
private String[] xTitleString; // x轴刻度
private String[] yTitleString; // y轴刻度
private String[] data; // 接口返回的indicatordata，用于计算柱子高度
NumberFormat numberFormat; //用于格式化数字
private float currentHeight; // 当前柱状图应有的高度，应由计算得来
private int num = -1; // 画多少条柱子，因为存在刚开机数据不足24条的情况
private float mRelativePxInHeight;
private float mRelativePxInWidth;
private OnChartClickListener listener;
private int mDist;
public void setNum(int num) {
this.num = num;
invalidate();
}
public void setData(String[] data) {
this.data = data;
invalidate();
}
public void setxTitleString(String[] title) {
this.xTitleString = title;
invalidate();
}
public HistoGram(Context context) {
this(context, null);
}
public HistoGram(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public void setTitle(String[] title) {
this.xTitleString = title;
}
public HistoGram(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
axisLinePaint = new Paint();
hLinePaint = new Paint();
textPaint = new Paint();
recPaint = new Paint();
dataPaint = new Paint();
textPaint2 = new Paint();
textPaint3 = new Paint();
textPaint4 = new Paint();
numberFormat = NumberFormat.getNumberInstance();
numberFormat.setMinimumFractionDigits(3); //设置打印时保留三位小数
axisLinePaint.setColor(Color.parseColor("#dbdde4")); //设置坐标轴的颜色为白色
hLinePaint.setARGB(51, 255, 255, 255);
textPaint.setColor(Color.parseColor("#8593a1"));
// textPaint.setTextSize(29);
textPaint.setTextSize(UI.dip2px(getContext(), 12));
recPaint.setColor(Color.parseColor("#f2f5fc"));
dataPaint.setColor(Color.CYAN);
textPaint2.setColor(Color.WHITE);
textPaint2.setTextSize(UI.dip2px(getContext(), 12));
textPaint3.setColor(Color.parseColor("#000000"));
textPaint3.setTextSize(UI.dip2px(getContext(), 9));
textPaint4.setColor(Color.parseColor("#8593a1"));
textPaint4.setTextSize(UI.dip2px(getContext(), 6));
axisLinePaint.setAntiAlias(true);
hLinePaint.setAntiAlias(true);
textPaint.setAntiAlias(true);
recPaint.setAntiAlias(true);
dataPaint.setAntiAlias(true);
textPaint2.setAntiAlias(true);
textPaint3.setAntiAlias(true);
textPaint4.setAntiAlias(true);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(data == null || xTitleString == null || num < 0 ) {
return;
}
//绘制y轴刻度
Paint.FontMetrics metrics = textPaint3.getFontMetrics();
int decent = (int) metrics.descent;
float width = getWidth();
float height = getHeight();
//根据原型图得出，图中每px高度在实际中的相对尺寸
mRelativePxInHeight = height / 470;
//根据原型图得出，图中每px宽度在实际中的相对尺寸
mRelativePxInWidth = width / 690;
textPaint3.setTextAlign(Paint.Align.RIGHT);
//绘制纵坐标
yTitleString = new String[6];
yTitleString[5] = "0";
yTitleString[4] = "20";
yTitleString[3] = "40";
yTitleString[2] = "60";
yTitleString[1] = "80";
yTitleString[0] = "100";
for (int i = 0; i < yTitleString.length; i++) {
canvas.drawText(yTitleString[i], 88 * mRelativePxInWidth, (72 + i * 56) * mRelativePxInHeight + decent, textPaint3);
}
//绘制x轴刻度
textPaint3.setTextAlign(Paint.Align.CENTER);
textPaint4.setTextAlign(Paint.Align.CENTER);
TextPaint textPaint = new TextPaint();
textPaint.setColor(Color.parseColor("#000000"));
textPaint.setTextSize(UI.dip2px(getContext(), 9));
//计算柱子之间的间隔
//最左侧位置100 * mRelativePxInWidth,最右侧位置630 ePxInWidth,
float totalWidth = 630 - 100;
// 柱子与之子之间的间隔
mDist = (int) (totalWidth / (xTitleString.length + 1));
for (int i = 0; i < xTitleString.length; i++) {
//绘制白色竖线
canvas.drawLine((100 + (i+1) * mDist) * mRelativePxInWidth, 348 * mRelativePxInHeight, (100 + (i+1) * mDist) * mRelativePxInWidth, 352 * mRelativePxInHeight, axisLinePaint);
//绘制x轴文字
canvas.drawText(xTitleString[i], (100 + (i+1) * mDist) * mRelativePxInWidth, 370 * mRelativePxInHeight, textPaint3);
}
// 绘制矩形阴影
for (int i = 0; i < num; i++) {
RectF rectF = new RectF();
// rectF.left = 111 * relativePxInWidth + i * 22 * relativePxInWidth;
// rectF.right = 121 * relativePxInWidth + i * 22 * relativePxInWidth;
rectF.left = 95 * mRelativePxInWidth + (i+1) * mDist * mRelativePxInWidth;
rectF.right = 105 * mRelativePxInWidth +(i+1) * mDist * mRelativePxInWidth;
rectF.top = 70 * mRelativePxInHeight;
rectF.bottom = 338 * mRelativePxInHeight;
canvas.drawRoundRect(rectF, 10, 10, recPaint);
}
// 绘制x轴坐标线
for (int i = 0; i < 6; i++) {
canvas.drawLine(100 * mRelativePxInWidth, (66 + i * 56) * mRelativePxInHeight + decent, 630 * mRelativePxInWidth, (66 + i * 56) * mRelativePxInHeight + decent, axisLinePaint);
}
// 延时绘制，实现动画效果。数字越大，延时越久，动画效果就会越慢
handler.postDelayed(this, 1);
for (int i = 0; i < num; i++) {
RectF dataRectF = new RectF();
dataRectF.left = 95 * mRelativePxInWidth + (i + 1) * mDist * mRelativePxInWidth;
dataRectF.right = 105 * mRelativePxInWidth + (i + 1) * mDist * mRelativePxInWidth;
dataPaint.setColor(Color.parseColor("#3ac2d9"));
//获取柱子高度
currentHeight = Float.parseFloat(data[num - 1 - i]);
if (currentHeight == 0) {
dataRectF.top = 346 * mRelativePxInHeight;
} else if (currentHeight == 100) {
dataRectF.top = 70 * mRelativePxInHeight;
} else {
if (animHeight >= currentHeight) {
dataRectF.top = 346 * mRelativePxInHeight - currentHeight / 100 * 276 * mRelativePxInHeight;
} else {
dataRectF.top = 346 * mRelativePxInHeight - 276 * mRelativePxInHeight * (animHeight / 100);
}
}
dataRectF.bottom = 346 * mRelativePxInHeight;
// 限制最高高度
if (dataRectF.top < 70 * mRelativePxInHeight) {
dataRectF.top = 70 * mRelativePxInHeight;
}
canvas.drawRoundRect(dataRectF, 10, 10, dataPaint);
}
}
//实现柱子增长的动画效果
@Override
public void run() {
animHeight += 1;
if (animHeight >= 276 * mRelativePxInHeight) {
return;
} else {
invalidate();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: {
//获取点击坐标
float x = event.getX();
float y = event.getY();
//判断点击点的位置
float leftx = 0;
float rightx = 0;
for (int i = 0; i < num; i++) {
leftx = 95 * mRelativePxInWidth + (i+ 1) * mDist * mRelativePxInWidth - mDist/2 * mRelativePxInWidth;
rightx = 105 * mRelativePxInWidth + (i+ 1) * mDist * mRelativePxInWidth + mDist/2 * mRelativePxInWidth;
if (x < leftx) {
continue;
}
if (leftx <= x && x <= rightx) {
//获取点击的柱子区域的y值
float top = 346 * mRelativePxInHeight - Float.parseFloat(data[num - 1 - i])/ 100 * 276 * mRelativePxInHeight;
float bottom = 346 * mRelativePxInHeight;
if (y >= top && y <= bottom) {
//判断是否设置监听
//将点击的第几条柱子，点击柱子顶部的坐值，用于弹出dialog提示数据，还要返回百分比currentHeidht = Float.parseFloat(data[num - 1 - i])
if(listener != null) {
Log.e("ss","x" + x +";y:" + y);
listener.onClick(i + 1, leftx + mDist/2,top,Float.parseFloat(data[num - 1 - i]));
}
break;
}
}
}
break;
}
case MotionEvent.ACTION_MOVE:
Log.e("touch", "ACTION_MOVE");
break;
case MotionEvent.ACTION_UP:
Log.e("touch", "ACTION_UP");
break;
}
return true;
}
public interface OnChartClickListener {
void onClick(int num, float x, float y, float value);
}
public void setOnChartClickListener(OnChartClickListener listener) {
this.listener = listener;
}
} 在xml文件中的应用：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.histogram.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="40dp"
android:gravity="center"
android:text="繁忙度指示图(%)"
android:textSize="15sp"
android:textColor="#000000"
/>
<com.example.histogram.HistoGram
android:id="@+id/staticview"
android:layout_width="400dp"
android:layout_height="500dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="14dp"
android:layout_marginTop="5dp"/>
</LinearLayout> 在activity中的实现：
package com.example.histogram;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.PopupWindow;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private PopupWindow mPopupWindow;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final HistoGram histoGram = (HistoGram) findViewById(R.id.staticview);
String[] data ={"100","20","40","20","80","20","60","30","5","20","60","30","5","5","20","60","30","5"};
final String[] title = {"1","2","3","4","5","6","7","8","9","6","7","8","9","9","6","7","8","9"};
histoGram.setNum(title.length);
histoGram.setData(data);
histoGram.setxTitleString(title);
histoGram.setOnChartClickListener(new HistoGram.OnChartClickListener() {
@Override
public void onClick(int num, float x, float y, float value) {
//显示提示窗
View inflate = View.inflate(MainActivity.this, R.layout.popupwindow, null);
TextView textView = (TextView) inflate.findViewById(R.id.main_tv);
textView.setText(value + "%\n" + title[num - 1]);
if(mPopupWindow != null) {
mPopupWindow.dismiss();
}
mPopupWindow = new PopupWindow(inflate,140, 60, true);
mPopupWindow.setTouchable(true);
Log.e("ss","num" + num +";x" + x+";y"+ y + ";value" + value
+";(int)((- histoGram.getHeight()) + y - 65)"
+(int)((- histoGram.getHeight()) + y - 65)
+ "histoGram.getHeight()" + histoGram.getHeight());
// 设置好参数之后再show
// Toast.makeText(MainActivity.this, "num" + num +";x" + x+";y"+ y + ";value" + value
// +";popupWindow.getWidth()"+ mPopupWindow.getWidth()+";"+ mPopupWindow.getHeight(), Toast.LENGTH_SHORT).show();
mPopupWindow.showAsDropDown(histoGram,(int)(x - 65),(int)((- histoGram.getHeight()) + y - 65) );
mPopupWindow.setBackgroundDrawable(getResources().getDrawable(R.mipmap.databg_busyness));
new Handler().postDelayed(new Runnable(){
public void run() {
mPopupWindow.dismiss();
}
}, 1000);
}
});
}
} 以上所述是小编给大家介绍的Android自定义带增长动画和点击弹窗提示效果的柱状图,实现一个模拟后台数据登入的效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对编程网网站的支持！
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