Android实现一个包含表格的图标库实例代码

之前有写过一个图表lib,但是开发的速度,大多很难跟上产品需求变化的脚步,所以修改了下原先的图表库,支持图表下面能整合table显示对应的类目,用曲线替换了折线,支持多曲线的显示,增加了显示的动画,,增加了一些可定制的属性,支持水平柱状图和叠加柱状图,以及多曲线图和饼状图的显示

1.效果图

2.各种图表的使用方式

1.饼状图 这个和原先的使用一样,只不过增加了一个动画,可以参看之前的文章,饼状图使用。

2.水平多柱状图

2.1 xml布局

 <wellijohn.org.varchart.hor_bar_with_line_chart.ChartLine
  android:id="@+id/chartline"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@color/white"
  app:default_x_visible_num="4.2"//一个屏幕中显示多少列
  app:y_interval="40dp"//Y轴的间距
  app:y_num_text_max_width="56dp"//y轴左边的文字的宽度 />

还有y_visible_num:y轴需要显示几列

2.2 数据设置

public class HorBarActivity extends AppCompatActivity {
 //显示的坐标点
 private ChartLine mChartline;
 //多条折线的坐标点
 private List<List<DotVo>> mMulListDisDots;
 //x轴的点
 private String[] mXdots = new String[]{"08/18"
   , "08/19",
   "08/20", "08/21", "08/22", "08/23", "08/24",
   "08/25", "08/26", "08/27", "08/28", "08/29", "09/01", "09/02", "09/23",
 };
 private double mMax = 44;
 private Random rand = new Random();
 private List<CategoryVo> mCategoryList;
 @Override
 protected void onCreate(@Nullable Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_hor_bar);
  initView();
  initMulTestData();
  initCategoryList();
  try {
   mChartline.setYAxisMaxValue(mMax).setXdots(mXdots).setAnimationOpen(true).setListDisDots(mMulListDisDots).
     setCategoryList(mCategoryList).reDraw();
  } catch (YCoordinateException e) {
   Log.d("MainActivity", "onCreate: ");
   e.printStackTrace();
  }
 }
 /**
  * 柱状图的数据,是一个list,一个CategoryVo,就是一列中增加一个柱状
  * CategoryVo:{
  *  卡券类目的名称
  *  private String categoryName;
  *  每个卡券类目的值
  *  private List<String> categoryValueList;
  * }
  */
 private void initCategoryList() {
  mCategoryList = new ArrayList<>();
  mCategoryList.add(new CategoryVo());
  mCategoryList.add(new CategoryVo());
  mCategoryList.add(new CategoryVo());
 }
 /**
  * 初始化曲线图,private List<List<DotVo>> mMulListDisDots;
  * List<DotVo>>就是一条曲线图,
  */
 private void initMulTestData() {
  mMulListDisDots = new ArrayList<>();
  for (int i = 0; i < 3; i++) {
   ArrayList<DotVo> temp = new ArrayList();
   DotVo tempDotVo = new DotVo("08/18", rand.nextInt((int) mMax));
   temp.add(tempDotVo);
   DotVo tempDotVo1 = new DotVo("08/19", rand.nextInt((int) mMax));
   temp.add(tempDotVo1);
   DotVo tempDotVo2 = new DotVo("08/20", rand.nextInt((int) mMax));
   temp.add(tempDotVo2);
   DotVo tempDotVo3 = new DotVo("08/21", rand.nextInt((int) mMax));
   temp.add(tempDotVo3);
   DotVo tempDotVo4 = new DotVo("08/22", rand.nextInt((int) mMax));
   temp.add(tempDotVo4);
   DotVo tempDotVo5 = new DotVo("08/23", rand.nextInt((int) mMax));
   temp.add(tempDotVo5);
   DotVo tempDotVo6 = new DotVo("09/02", rand.nextInt((int) mMax));
   temp.add(tempDotVo6);
   mMulListDisDots.add(temp);
  }
 }
 private void initView() {
  mChartline = findViewById(R.id.chartline);
 }
}

3.叠加柱状图

3.1 xml布局

<wellijohn.org.varchart.overlay_bar_with_line_chart.OverLayBarChartLine
  android:id="@+id/overlay_chart_line"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:background="@color/white"
  android:visibility="visible"
  app:overlay_default_x_visible_num="4.2"
  app:overlay_y_interval="40dp"
  app:overlay_y_num_text_max_width="56dp" />

3.2 数据设置,如2.2一样

3.实现的几个关键点

3.1 宽度需要重写,onMeasure,因为的控件的宽度是大于屏幕的宽度的,宽度是根据显示的x轴的点和间距,以及y轴坐标的文字的所占的宽度的距离所组成。  

 int widthParentMeasureMode = MeasureSpec.getMode(widthMeasureSpec);
  int widthParentMeasureSize = MeasureSpec.getSize(widthMeasureSpec);
  int heightParentMeasureMode = MeasureSpec.getMode(heightMeasureSpec);
  int heightParentMeasureSize = MeasureSpec.getSize(heightMeasureSpec);
  int resultWidthSize = 0;
  int resultHeightSize = 0;
  int resultWidthMode = MeasureSpec.EXACTLY;//用来对childView进行计算的
  int resultHeightMode = MeasureSpec.EXACTLY;
  int paddingWidth = getPaddingLeft() + getPaddingRight();
  int paddingHeight = getPaddingTop() + getPaddingBottom();
  ViewGroup.LayoutParams thisLp = getLayoutParams();
  switch (widthParentMeasureMode) {
   //父类不加限制给子类
   case MeasureSpec.UNSPECIFIED:
    //这个代表在布局写死了宽度
    if (thisLp.width > 0) {
     resultWidthSize = thisLp.width;
     resultWidthMode = MeasureSpec.EXACTLY;
    } else {
     resultWidthSize = (int) (getYMaxTextWidth() + mXinterval * mXdots.length);
     resultWidthMode = MeasureSpec.UNSPECIFIED;
    }
    break;
   case MeasureSpec.AT_MOST:
    //这个代表在布局写死了宽度
    if (thisLp.width > 0) {
     resultWidthSize = thisLp.width;
     resultWidthMode = MeasureSpec.EXACTLY;
    } else if (thisLp.width == ViewGroup.LayoutParams.MATCH_PARENT) {
     resultWidthSize = Math.max(0, widthParentMeasureSize - paddingWidth);
     resultWidthMode = MeasureSpec.AT_MOST;
    } else if (thisLp.width == ViewGroup.LayoutParams.WRAP_CONTENT) {
     resultWidthSize = (int) (getYMaxTextWidth() + mXinterval * mXdots.length);
     resultWidthMode = MeasureSpec.AT_MOST;
    }
    break;
   case MeasureSpec.EXACTLY:
    //这个代表在布局写死了宽度
    if (thisLp.width > 0) {
     resultWidthSize = Math.min(widthParentMeasureSize, thisLp.width);
     resultWidthMode = MeasureSpec.EXACTLY;
    } else if (thisLp.width == ViewGroup.LayoutParams.MATCH_PARENT) {
     resultWidthSize = widthParentMeasureSize;
     resultWidthMode = MeasureSpec.EXACTLY;
    } else if (thisLp.width == ViewGroup.LayoutParams.WRAP_CONTENT) {
     resultWidthSize = (int) (getYMaxTextWidth() + mXinterval * mXdots.length);
     resultWidthMode = MeasureSpec.AT_MOST;
    }
    break;
  }
  setMeasuredDimension(MeasureSpec.makeMeasureSpec(resultWidthSize, resultWidthMode),
    MeasureSpec.makeMeasureSpec(resultHeightSize, resultHeightMode));

3.2 规划固定的区域,在超出区域的部分不可见,这个在之前用的bitmap来实现,总感觉别扭,后面读官方的源码的时候,了解了canvas的clipRect方法,我们在绘制这块的时候,onDraw方法中调用

 int clipRestoreCount = canvas.save();
 canvas.clipRect(mContentRect);//绘制之前调用
 doDraw();//进行想要的绘制
 canvas.restoreToCount(clipRestoreCount);//绘制完成调用restoreToCount恢复到绘制这块之前的状态

3.3 动画我们基本都可以用ValueAnimator来实现,比如说饼状图:他的一个绘制是0-360的角度的转变,我们就可以

private void startPathAnim(long duration) {
  ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 360);
  valueAnimator.setDuration(duration);
  valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
   @Override
   public void onAnimationUpdate(ValueAnimator animation) {
    mDrawAngle = (float) animation.getAnimatedValue();
    ViewCompat.postInvalidateOnAnimation(CirclePercentChart.this);
   }
  });
  valueAnimator.start();
 }

然后通过mDrawAngle来控制每次绘制的角度,这样就可以有从0-360度绘制的感觉,那个柱状图的动画也是一样的,以不变应万变。

3.4 贝塞尔曲线绘制的算法

 if (i == 0) {// 第一条为二阶贝塞尔
  path.moveTo(mDots[0], mDots[1] + (mLastHorLineY - mDots[1]) * mPhaseY);// 起点
 } else {
  float cpx = preX + (mDots[0] - preX) / 2.0f;
  path.cubicTo(cpx, preY + (mLastHorLineY - preY) * mPhaseY,
    cpx, mDots[1] + (mLastHorLineY - mDots[1]) * mPhaseY,
    mDots[0], mDots[1] + (mLastHorLineY - mDots[1]) * mPhaseY);}

在绘制贝塞尔曲线,我仔细去查过这些控制点的计算规则,有根据三点,来计算出两个控制点,但是这样绘制出来在三个点内部曲线是很平滑的,但是在接下来的第四个点的衔接的时候,感觉不是很好,所以我还是用了上面的计算方法来计算控制点,算法我贴出来,参数分别是1,2,3的x和y坐标和弯曲系数

public static ControlPonits getControlPoints(double x0, double y0, double x1, double y1, double x2, double y2, double paramCoefficient) {
  double d01 = Math.sqrt(Math.pow(x1 - x0, 2) + Math.pow(y1 - y0, 2));
  double d12 = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));
  double fa = paramCoefficient * d01 / (d01 + d12); // scaling factor for triangle Ta
  double fb = paramCoefficient * d12 / (d01 + d12); // ditto for Tb, simplifies to fb=t-fa
  double p1x = x1 - fa * (x2 - x0); // x2-x0 is the width of triangle T
  double p1y = y1 - fa * (y2 - y0); // y2-y0 is the height of T
  double p2x = x1 + fb * (x2 - x0);
  double p2y = y1 + fb * (y2 - y0);
  ControlPonits tempControlPoints = new ControlPonits();
  tempControlPoints.beforeControlPointX = (float) p1x;
  tempControlPoints.beforeControlPointY = (float) p1y;
  tempControlPoints.afterControlPointX = (float) p2x;
  tempControlPoints.afterControlPointY = (float) p2y;
  return tempControlPoints;
 }

3.library引入方式

step 1. Add it in your root build.gradle at the end of repositories:

allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}
Step 2. Add the dependency
dependencies {
  compile 'com.github.WelliJohn:charts:1.0.0'
}

github地址

总结

以上所述是小编给大家介绍的Android实现一个包含表格的图标库实例代码,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小技巧网站的支持!

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