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之前有寫過一個圖表lib,但是開發(fā)的速度,大多很難跟上產(chǎn)品需求變化的腳步,所以修改了下原先的圖表庫,支持圖表下面能整合table顯示對應(yīng)的類目,用曲線替換了折線,支持多曲線的顯示,增加了顯示的動畫,,增加了一些可定制的屬性,支持水平柱狀圖和疊加柱狀圖,以及多曲線圖和餅狀圖的顯示
1.效果圖
2.各種圖表的使用方式 1.餅狀圖 這個和原先的使用一樣,只不過增加了一個動畫,可以參看之前的文章,餅狀圖使用。 2.水平多柱狀圖 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"http://一個屏幕中顯示多少列 app:y_interval="40dp"http://Y軸的間距 app:y_num_text_max_width="56dp"http://y軸左邊的文字的寬度 /> 還有y_visible_num:y軸需要顯示幾列
2.2 數(shù)據(jù)設(shè)置
public class HorBarActivity extends AppCompatActivity { //顯示的坐標點 private ChartLine mChartline; //多條折線的坐標點 private List<List<DotVo>> mMulListDisDots; //x軸的點 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(); } } /** * 柱狀圖的數(shù)據(jù),是一個list,一個CategoryVo,就是一列中增加一個柱狀 * CategoryVo:{ * 卡券類目的名稱 * private String categoryName; * 每個卡券類目的值 * private List<String> categoryValueList; * } */ private void initCategoryList() { mCategoryList = new ArrayList<>(); mCategoryList.add(new CategoryVo()); mCategoryList.add(new CategoryVo()); mCategoryList.add(new CategoryVo()); } /** * 初始化曲線圖,private List<List<DotVo>> mMulListDisDots; * List<DotVo>>就是一條曲線圖, */ 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.疊加柱狀圖 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 數(shù)據(jù)設(shè)置,如2.2一樣 3.實現(xiàn)的幾個關(guān)鍵點 3.1 寬度需要重寫,onMeasure,因為的控件的寬度是大于屏幕的寬度的,寬度是根據(jù)顯示的x軸的點和間距,以及y軸坐標的文字的所占的寬度的距離所組成。
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;//用來對childView進行計算的 int resultHeightMode = MeasureSpec.EXACTLY; int paddingWidth = getPaddingLeft() + getPaddingRight(); int paddingHeight = getPaddingTop() + getPaddingBottom(); ViewGroup.LayoutParams thisLp = getLayoutParams(); switch (widthParentMeasureMode) { //父類不加限制給子類 case MeasureSpec.UNSPECIFIED: //這個代表在布局寫死了寬度 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: //這個代表在布局寫死了寬度 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: //這個代表在布局寫死了寬度 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 規(guī)劃固定的區(qū)域,在超出區(qū)域的部分不可見,這個在之前用的bitmap來實現(xiàn),總感覺別扭,后面讀官方的源碼的時候,了解了canvas的clipRect方法,我們在繪制這塊的時候,onDraw方法中調(diào)用
int clipRestoreCount = canvas.save(); canvas.clipRect(mContentRect);//繪制之前調(diào)用 doDraw();//進行想要的繪制 canvas.restoreToCount(clipRestoreCount);//繪制完成調(diào)用restoreToCount恢復(fù)到繪制這塊之前的狀態(tài)
3.3 動畫我們基本都可以用ValueAnimator來實現(xiàn),比如說餅狀圖:他的一個繪制是0-360的角度的轉(zhuǎn)變,我們就可以
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(); }
然后通過mDrawAngle來控制每次繪制的角度,這樣就可以有從0-360度繪制的感覺,那個柱狀圖的動畫也是一樣的,以不變應(yīng)萬變。
3.4 貝塞爾曲線繪制的算法
if (i == 0) {// 第一條為二階貝塞爾 path.moveTo(mDots[0], mDots[1] + (mLastHorLineY - mDots[1]) * mPhaseY);// 起點 } 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);}
在繪制貝塞爾曲線,我仔細去查過這些控制點的計算規(guī)則,有根據(jù)三點,來計算出兩個控制點,但是這樣繪制出來在三個點內(nèi)部曲線是很平滑的,但是在接下來的第四個點的銜接的時候,感覺不是很好,所以我還是用了上面的計算方法來計算控制點,算法我貼出來,參數(shù)分別是1,2,3的x和y坐標和彎曲系數(shù)
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
以上就是本次小編整理的全部內(nèi)容,感謝你對億速云的支持。
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