Android表格图标库制作

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

以上就是本次小编整理的全部内容,感谢你对编程小技巧的支持。

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