Android 实现数字九宫格软键盘
前言
一开始大概是这种
需求
组长说 要不搞一个自定义软键盘吧 数字搞大点 方便外卖员输入数字
我设置了输入EditText的输入格式为Number 还是不行
那就开搞吧
先来看下实现的效果图吧
实现效果GIF
实现代码
自定义View 一个NineNumericKeyboardView
/** * Author by Lyu * Date on 2021/5/26-19:55 * Description:九宫格数字软键盘 */ public class NineNumericKeyboardView extends View { /** * 列 */ private static final int TOTAL_COL = 3; /** * 行 */ private static final int TOTAL_ROW = 4; private Paint HuiseBgPaint, linePaint; private Paint mTextPaint; private int mViewWidth; // 键盘宽度 private int mViewHight; // 键盘高度 private float mCellWidth, mCellHight; // 单元格宽度、高度 private Row rows[] = new Row[TOTAL_ROW]; private Bitmap bitmap; // 删除按钮图片 private Paint mCutTextPaint; //回调方法 public interface CallBack { void clickNum(String num);// 回调点击的数字 void deleteNum();// 回调删除 } private CallBack mCallBack;// 回调 public void setOnCallBack(CallBack callBack) { mCallBack = callBack; } public NineNumericKeyboardView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context); } public NineNumericKeyboardView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } public NineNumericKeyboardView(Context context) { super(context); init(context); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); drawLine(canvas); for (int i = 0; i < TOTAL_ROW; i++) { if (rows[i] != null) rows[i].drawCells(canvas); } } /** * 画6条直线 * * @param canvas */ private void drawLine(Canvas canvas) { canvas.drawLine(0, 0, mViewWidth, 0, linePaint); canvas.drawLine(0, mCellHight, mViewWidth, mCellHight, linePaint); canvas.drawLine(0, mCellHight * 2, mViewWidth, mCellHight * 2, linePaint); canvas.drawLine(0, mCellHight * 3, mViewWidth, mCellHight * 3, linePaint); canvas.drawLine(mCellWidth, 0, mCellWidth, mViewHight, linePaint); canvas.drawLine(mCellWidth * 2, 0, mCellWidth * 2, mViewHight, linePaint); } /** * 初始化画笔 * * @param context */ private void init(Context context) { mTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG); mCutTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG); linePaint = new Paint(Paint.ANTI_ALIAS_FLAG); linePaint.setTextSize(1.0f); linePaint.setColor(0x90000000); HuiseBgPaint = new Paint(Paint.ANTI_ALIAS_FLAG); HuiseBgPaint.setStyle(Paint.Style.FILL); HuiseBgPaint.setColor(Color.parseColor("#e9e9e9")); initDate(); } private void initDate() { fillDate(); } @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mViewWidth = w; mViewHight = h; mCellWidth = mViewWidth / TOTAL_COL; mCellHight = mViewHight / TOTAL_ROW; mTextPaint.setTextSize(mCellHight / 3); } private Cell mClickCell = null; private float mDownX; private float mDownY; /* * * 触摸事件为了确定点击位置的数字 */ @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mDownX = event.getX(); mDownY = event.getY(); int col = (int) (mDownX / mCellWidth); int row = (int) (mDownY / mCellHight); measureClickCell(col, row); break; case MotionEvent.ACTION_UP: if (mClickCell != null) { // 在抬起后把状态置为默认 rows[mClickCell.i].cells[mClickCell.j].state = State.DEFAULT_NUM; mClickCell = null; invalidate(); } break; } return true; } /** * 测量点击单元格 * * @param col 列 * @param row 行 */ private void measureClickCell(int col, int row) { if (col >= TOTAL_COL || row >= TOTAL_ROW) return; if (rows[row] != null) { mClickCell = new Cell(rows[row].cells[col].num, rows[row].cells[col].state, rows[row].cells[col].i, rows[row].cells[col].j); rows[row].cells[col].state = State.CLICK_NUM; if ("-5".equals(rows[row].cells[col].num)) { mCallBack.deleteNum(); } else { mCallBack.clickNum(rows[row].cells[col].num); } invalidate(); } } /** * 组 以一行为一组 */ private class Row { public int j; Row(int j) { this.j = j; } // 一行3个单元格 public Cell[] cells = new Cell[TOTAL_COL]; public void drawCells(Canvas canvas) { for (int i = 0; i < cells.length; i++) { if (cells[i] != null) cells[i].drawSelf(canvas); } } } // 单元格 private class Cell { public String num; public State state; /** * i = 行 j = 列 */ public int i; public int j; public Cell(String num, State state, int i, int j) { super(); this.num = num; this.state = state; this.i = i; this.j = j; } // 绘制一个单元格 如果颜色需要自定义可以修改 public void drawSelf(Canvas canvas) { switch (state) { case CLICK_NUM: // 绘制点击效果灰色背景 canvas.drawRect((mCellWidth * j), (mCellHight * i), (mCellWidth * (j + 1)), (mCellHight * (i + 1)), HuiseBgPaint); break; } if ("-5".equals(num)) { // 绘制删除图片 canvas.drawBitmap(bitmap, (float) (mCellWidth * 2.5 - bitmap.getWidth() / 2), (float) (mCellHight * 3.5 - bitmap.getHeight() / 2), HuiseBgPaint); } else { // 绘制数字 canvas.drawText(num, (float) ((j + 0.5) * mCellWidth - mTextPaint.measureText(num) / 2), (float) ((i + 0.5) * mCellHight + mTextPaint.measureText(num, 0, 1) / 2), mTextPaint); } } } /** * cell的state */ private enum State { DEFAULT_NUM, CLICK_NUM; } private List<String> numKeys = Arrays.asList("1", "2", "3", "4", "5", "6", "7", "8", "9", "0"); /** * 填充数字 */ private void fillDate() { int postion = 0; for (int i = 0; i < TOTAL_ROW; i++) { rows[i] = new Row(i); for (int j = 0; j < TOTAL_COL; j++) { if (i == 3 && j == 0) { rows[i].cells[j] = new Cell(".", State.DEFAULT_NUM, i, j); continue; } else if (i == 3 && j == 2) { rows[i].cells[j] = new Cell("-5", State.DEFAULT_NUM, i, j); continue; } else { rows[i].cells[j] = new Cell(numKeys.get(postion), State.DEFAULT_NUM, i, j); postion++; } } } //这里是插入一张删除数字的图 一般是 X bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.keyboard_delete); } }
使用方法
利用android自带的组件PopupWindow在指定页面的下方弹出即可 完成效果
在指定的View页面
//初始化键盘 private void initKeyboardView() { // 设置不弹出系统键盘 etInputPickupCode.setInputType(InputType.TYPE_NULL); // 自己监听EditText的点击事件弹出我们自定义的键盘 etInputPickupCode.setOnClickListener(view -> mPop.showAtLocation(llKey, Gravity.BOTTOM, 0, 0)); mPop = new PopupWindow(); mPopView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.custom_keyboardview, null); mPop.setContentView(mPopView); mPop.setTouchable(true); mPop.setFocusable(true); mPop.setBackgroundDrawable(new ColorDrawable()); mPop.setWidth(ViewGroup.LayoutParams.MATCH_PARENT); mPop.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT); mCustomKeyView = mPopView.findViewById(R.id.key_view); // 设置回调,并进行文本的插入与删除 mCustomKeyView.setOnCallBack(this); } @Override public void clickNum(String num) { if (etInputPickupCode.getText().length() < 8) { etInputPickupCode.append(num); } } @Override public void deleteNum() { int last = etInputPickupCode.getText().length(); if (last > 0) { //删除最后一位 etInputPickupCode.getText().delete(last - 1, last); } }
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