本文實例為大家分享了Android列表時間軸展示的具體代碼，供大家參考，具體內容如下

實現的效果圖如下:

實現的方式是利用recycleview的ItemDecoration這個抽象類,就是我們經常用來畫分割線的的這個類,

具體如下

public class DividerItemDecoration extends RecyclerView.ItemDecoration{

// 寫右邊字的畫筆(具體信息)

private Paint mPaint;

// 寫左邊日期字的畫筆( 時間 + 日期)

private Paint mPaint1;

private Paint mPaint2;

private Paint mPaint3;

// 左 上偏移長度

private int itemView_leftinterval;

private int itemView_topinterval;

// 軸點半徑

private int circle_radius;

// 圖標

private Bitmap mIcon;

//月份合集(使用時需要設置)

private List monthList= new ArrayList<>();

//年份合集(使用時需要設置)

private List yearList= new ArrayList<>();

public void setMonthList(List monthList) {

this.monthList = monthList;

}

public void setYearList(List yearList) {

this.yearList = yearList;

}

// 在構造函數里進行繪制的初始化，如畫筆屬性設置等

public DividerItemDecoration(Context context) {

// 軸點畫筆(紅色)

mPaint = new Paint();

mPaint.setColor(Color.rgb(58, 154, 239));

mPaint.setStyle(Paint.Style.STROKE);

mPaint.setStrokeWidth(3);

// 左邊時間文本畫筆(藍色)

// 此處設置了兩只分別設置 時分 & 年月

mPaint1 = new Paint();

mPaint1.setColor(Color.BLACK);

mPaint1.setTextSize(30);

mPaint2 = new Paint();

mPaint2.setColor(context.getResources().getColor(R.color.divider));

mPaint2.setTextSize(26);

mPaint3 = new Paint();

mPaint3.setColor(Color.rgb(58, 154, 239));

mPaint3.setTextSize(20);

// 賦值ItemView的左偏移長

itemView_leftinterval = 150;

// 賦值ItemView的上偏移長度

itemView_topinterval = 30;

// 賦值軸點圓的半徑為10

circle_radius = 8;

}

// 重寫getItemOffsets()方法

// 作用：設置ItemView 左 & 上偏移長度

@Override

public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {

super.getItemOffsets(outRect, view, parent, state);

// 設置ItemView的左 & 上偏移長度分別為150 px & 30px,即此為onDraw()可繪制的區域

outRect.set(itemView_leftinterval, itemView_topinterval, 0, 0);

}

// 重寫onDraw()

// 作用:在間隔區域里繪制時光軸線 & 時間文本

@Override

public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {

super.onDraw(c, parent, state);

// 獲取RecyclerView的Child view的個數

int childCount = parent.getChildCount();

// 遍歷每個Item，分別獲取它們的位置信息，然后再繪制對應的分割線

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

// 獲取每個Item對象

View child = parent.getChildAt(i);

View lastChild = null;

if (i > 0) {

lastChild = parent.getChildAt(i - 1);

}

/**

* 繪制軸點

*/

// 軸點 = 圓 = 圓心(x,y) 位置可以根據需求來調節

float centerx = child.getLeft() - itemView_leftinterval / 4;

float centery = child.getTop() + itemView_topinterval +10;

// 繪制軸點圓

c.drawCircle(centerx, centery, circle_radius, mPaint);

/**

* 繪制上半軸線(x軸是保持不變的)

*/

// 上端點坐標(x,y)

float upLine_up_x = centerx;

float upLine_up_y = 0;

if (i>0){

upLine_up_y = lastChild.getBottom();

}else {

upLine_up_y = centery - itemView_topinterval;

}

// 下端點坐標(x,y)

float upLine_bottom_x = centerx;

float upLine_bottom_y = centery - circle_radius;

//繪制上半部軸線

c.drawLine(upLine_up_x, upLine_up_y, upLine_bottom_x, upLine_bottom_y, mPaint);

/**

* 繪制下半軸線,最后一個不畫下半軸

*/

if (i

// 上端點坐標(x,y)

float bottomLine_up_x = centerx;

float bottom_up_y = centery + circle_radius;

// 下端點坐標(x,y)

float bottomLine_bottom_x = centerx;

float bottomLine_bottom_y = child.getBottom();

//繪制下半部軸線

c.drawLine(bottomLine_up_x, bottom_up_y, bottomLine_bottom_x, bottomLine_bottom_y, mPaint);

}

/**

* 繪制左邊時間文本

*/

// 獲取每個Item的位置

int index = parent.getChildAdapterPosition(child);

// 設置文本起始坐標

float Text_x = child.getLeft() - itemView_leftinterval * 5 / 6;

float Text_y = upLine_bottom_y;

// 根據Item位置設置時間文本

switch (index) {

case (0):

// 設置日期繪制位置

c.drawText(monthList.get(0), Text_x, Text_y, mPaint1);

c.drawText(yearList.get(0), Text_x + 8, Text_y + 28, mPaint2);

break;

case (1):

// 設置日期繪制位置

c.drawText(monthList.get(1), Text_x, Text_y, mPaint1);

c.drawText(yearList.get(1), Text_x + 8, Text_y + 28, mPaint2);

break;

case (2):

// 設置日期繪制位置

if (TextUtils.isEmpty(yearList.get(2))){

c.drawText(monthList.get(2), Text_x, Text_y, mPaint3);

}else {

c.drawText(monthList.get(2), Text_x, Text_y, mPaint1);

c.drawText(yearList.get(2), Text_x + 8, Text_y + 28, mPaint2);

}

break;

case (3):

// 設置日期繪制位置

c.drawText(monthList.get(3), Text_x, Text_y, mPaint1);

c.drawText(yearList.get(3), Text_x + 8, Text_y + 28, mPaint2);

break;

case (4):

// 設置日期繪制位置

c.drawText(monthList.get(4), Text_x, Text_y, mPaint1);

c.drawText(yearList.get(4), Text_x + 8, Text_y + 28, mPaint2);

break;

default:c.drawText("結束", Text_x, Text_y, mPaint1);

}

}

}

}

使用比較簡單:

DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(this);

dividerItemDecoration.setMonthList(monthList);

dividerItemDecoration.setYearList(yearList);

mRecyclerView.addItemDecoration(dividerItemDecoration);

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