APK下載地址

1.效果圖

2.各種圖表的使用方式

1.餅狀圖 這個(gè)和原先的使用一樣，只不過增加了一個(gè)動(dòng)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

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"//一個(gè)屏幕中顯示多少列

app:y_interval="40dp"//Y軸的間距

app:y_num_text_max_width="56dp"//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(biāo)點(diǎn)

private ChartLine mChartline;

//多條折線的坐標(biāo)點(diǎn)

private List> mMulListDisDots;

//x軸的點(diǎn)

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 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(gè)list，一個(gè)CategoryVo，就是一列中增加一個(gè)柱狀

* CategoryVo：{

* 卡券類目的名稱

* private String categoryName;

* 每個(gè)卡券類目的值

* private List 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> mMulListDisDots;

* List>就是一條曲線圖，

*/

private void initMulTestData() {

mMulListDisDots = new ArrayList<>();

for (int i = 0; i < 3; i++) {

ArrayList 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

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(shí)現(xiàn)的幾個(gè)關(guān)鍵點(diǎn)

3.1 寬度需要重寫，onMeasure，因?yàn)榈目丶膶挾仁谴笥谄聊坏膶挾鹊?#xff0c;寬度是根據(jù)顯示的x軸的點(diǎn)和間距，以及y軸坐標(biāo)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(jìn)行計(jì)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(gè)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(gè)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(gè)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(gè)在之前用的bitmap來實(shí)現(xiàn)，總感覺別扭，后面讀官方的源碼的時(shí)候，了解了canvas的clipRect方法，我們在繪制這塊的時(shí)候，onDraw方法中調(diào)用

int clipRestoreCount = canvas.save();

canvas.clipRect(mContentRect);//繪制之前調(diào)用

doDraw();//進(jìn)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(dòng)畫我們基本都可以用ValueAnimator來實(shí)現(xiàn)，比如說餅狀圖：他的一個(gè)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(gè)柱狀圖的動(dòng)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(diǎn)

} 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(xì)去查過這些控制點(diǎn)的計(jì)算規(guī)則，有根據(jù)三點(diǎn)，來計(jì)算出兩個(gè)控制點(diǎn)，但是這樣繪制出來在三個(gè)點(diǎn)內(nèi)部曲線是很平滑的，但是在接下來的第四個(gè)點(diǎn)的銜接的時(shí)候，感覺不是很好，所以我還是用了上面的計(jì)算方法來計(jì)算控制點(diǎn)，算法我貼出來，參數(shù)分別是1，2，3的x和y坐標(biāo)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;

}

github地址

如果大家有好的想法的話，希望能夠交流下,如果你們覺得文章對你自定義view有幫助，希望你們幫忙star下，謝謝

總結(jié)

以上是生活随笔為你收集整理的android自定义图标下载,charts的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。