Android自定义StepView仿外卖配送进度

<?xml version="1.0" encoding="utf-8"?> <resources>  <declare-styleable name="StepView">  <attr name="step_size" format="dimension"/><!--step的size，也就是image的大小-->  <attr name="line_size" format="dimension"/><!--线宽-->  <attr name="text_size" format="dimension"/><!--文字大小-->  <attr name="text_line_margin" format="dimension"/><!--文字和线之间的间距-->  <attr name="normal_line_color" format="color"/><!--一般线的颜色-->  <attr name="normal_text_color" format="color"/><!--一般文字的颜色-->  <attr name="target_text_color" format="color"/><!--一般文字的颜色-->  <attr name="passed_line_color" format="color"/><!--已经过线的颜色-->  <attr name="step_count" format="integer"/><!--总step数-->  <attr name="current_step" format="integer"/><!--当前step位置-->  <attr name="normal_step_iv" format="reference"/><!--一般图片-->  <attr name="passed_step_iv" format="reference"/><!--已经过的图片-->  <attr name="target_step_iv" format="reference"/><!--当前step图片-->  <attr name="step_is_touch" format="boolean"/><!--step是否可点-->  <attr name="text_up_line" format="boolean"/><!--文字是否在线上-->  </declare-styleable> </resources> 

CheckBox cbTouch = findViewById(R.id.cb_touch); CheckBox cbIsDown = findViewById(R.id.cb_is_down); final StepView stepView = findViewById(R.id.step_view); String[] stepTexts = new String[]{"订单已提交", "商家已接单", "配送中", "已送达"}; stepView.setStepTexts(stepTexts);//传入每一进度的文字描述 stepView.setCurrentStep(2);//设置当前进度所在位置 stepView.setOnItemStepTouchListener(new StepView.OnItemStepTouchListener() {  @Override  public void onItemStepTouch(int postion) {  Log.d(TAG, "当前点击位置: "+postion);  } }); cbTouch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {  @Override  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {  stepView.setStepIsTouch(isChecked);  } }); cbIsDown.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {  @Override  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {  stepView.setTextUpLine(!isChecked);  } }); 

public StepView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {  super(context, attrs, defStyleAttr);  init(context, attrs);  }   private void init(Context context, AttributeSet attrs) {  mLinePaint = new Paint();  mLinePaint.setAntiAlias(true);  mTextPaint = new Paint();  mTextPaint.setAntiAlias(true);  mPreLineLength = 0;  //默认的step图片  mNormalBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_normal);  mPassedBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_passed);  mTargetBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_target);   TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.StepView);  //获取xml文件中的线的颜色值、size  mNormalLineColor = typedArray.getColor(R.styleable.StepView_normal_line_color, Color.BLUE);  mPassedLineColor = typedArray.getColor(R.styleable.StepView_passed_line_color, Color.WHITE);  int lineSize = (int) typedArray.getDimension(R.styleable.StepView_line_size, 2);  //获取xml文件中的文本的颜色值、size  mNormalTextColor = typedArray.getColor(R.styleable.StepView_normal_text_color, Color.BLACK);  mTargetTextColor = typedArray.getColor(R.styleable.StepView_target_text_color, Color.BLACK);  int textSize = (int) typedArray.getDimension(R.styleable.StepView_text_size, 10);  //获取xml文件中的step的size，设置给step图片的高度  int stepSize = (int) typedArray.getDimension(R.styleable.StepView_step_size, 0);  //获取xml文件中的文本和线之间的间距  mTextLineMargin = (int) typedArray.getDimension(R.styleable.StepView_text_line_margin, 3);  //获取xml文件中的step总数  mStepCount = typedArray.getInt(R.styleable.StepView_step_count, 2);   //获取xml文件中的当前step位置  mCurrentStep = typedArray.getInt(R.styleable.StepView_current_step, 0);  //获取xml文件中step图片  BitmapDrawable normalDrawable = (BitmapDrawable) typedArray.getDrawable(R.styleable.StepView_normal_step_iv);  BitmapDrawable passedDrawable = (BitmapDrawable) typedArray.getDrawable(R.styleable.StepView_passed_step_iv);  BitmapDrawable targetDrawable = (BitmapDrawable) typedArray.getDrawable(R.styleable.StepView_target_step_iv);  //获取xml文件中step是否可点击TRUE可以，FALSE不可以，默认为FALSE  mStepIsTouch = typedArray.getBoolean(R.styleable.StepView_step_is_touch, false);  //获取xml文件中text是否在线上，TRUE在线上，FALSE不在线上，默认为FALSE  mTextUpLine = typedArray.getBoolean(R.styleable.StepView_text_up_line, true);  mTextPaint.setTextSize(textSize);  mLinePaint.setStrokeWidth(lineSize);  mNormalBitmap = normalDrawable.getBitmap();//将xml文件中指定的图片赋给对应的bitmap  mPassedBitmap = passedDrawable.getBitmap();  mTargetBitmap = targetDrawable.getBitmap();  mNormalBitmapWH = getBitmapWH(stepSize, mNormalBitmap);  mPassedBitmapWH = getBitmapWH(stepSize, mPassedBitmap);  mTargetBitmapWH = getBitmapWH(stepSize, mTargetBitmap);  if (stepSize != 0) {//如果stepSize不为0，要对其进行压缩处理，使其高度等于stepSize   mNormalBitmap = zoomImg(mNormalBitmap, mNormalBitmapWH);   mPassedBitmap = zoomImg(mPassedBitmap, mPassedBitmapWH);   mTargetBitmap = zoomImg(mTargetBitmap, mPassedBitmapWH);  }  mStepRectFs = new RectF[mStepCount];//初始化step所对应的矩阵数组，点击step时会用到，用于确定点击的是哪个step  typedArray.recycle(); } 

@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  int widthMode = MeasureSpec.getMode(widthMeasureSpec);  int widthSize = MeasureSpec.getSize(widthMeasureSpec);  int heightMode = MeasureSpec.getMode(heightMeasureSpec);  int heightSize = MeasureSpec.getSize(heightMeasureSpec);  int width = widthSize - getPaddingLeft() - getPaddingRight();//任何模式下with都是父容器给定的with-padding值  int height = 0;  if (heightMode == MeasureSpec.EXACTLY) {  height = heightSize - getPaddingTop() - getPaddingBottom();  } else {  height = dp2px(getContext(), 80);  }  setMeasuredDimension(width, height);  mPreLineLength = width / (mStepCount + 1);//计算每条线的长度，由于线比step多一个所以加1 } 

@Override protected void onDraw(Canvas canvas) {  if (mStepCount != 0) {  drawLine(canvas);//drawLine和drawStep分两次循环是为了防止部分线覆盖step  drawStep(canvas);  } } 

private void drawLine(Canvas canvas) {  float lineStartX = getPaddingLeft();  float lineStartY = getLineStartY();  float lineStopX = 0;  float lineStopY = lineStartY;  for (int i = 0; i < mStepCount + 1; i++) {  if (i < mCurrentStep - 1) {   mLinePaint.setColor(mPassedLineColor);  } else if (i == mCurrentStep - 1) {   mLinePaint.setColor(mPassedLineColor);  } else {   mLinePaint.setColor(mNormalLineColor);  }  lineStopX = lineStartX + mPreLineLength;  canvas.drawLine(lineStartX, lineStartY, lineStopX, lineStopY, mLinePaint);  lineStartX = lineStopX;  } } 

private void drawStep(Canvas canvas) {  float lineStartX = getPaddingLeft();  float lineStartY = getLineStartY();  Bitmap currentBitmap;  int[] currentBitmapWH;  float lineStopX;  float bitmapLeft;  float bitmapTop;  for (int i = 0; i < mStepCount; i++) {  if (i < mCurrentStep - 1) {   currentBitmap = mPassedBitmap;   currentBitmapWH = mPassedBitmapWH;   mTextPaint.setColor(mNormalTextColor);  } else if (i == mCurrentStep - 1) {   currentBitmap = mTargetBitmap;   currentBitmapWH = mTargetBitmapWH;   mTextPaint.setColor(mTargetTextColor);  } else {   currentBitmap = mNormalBitmap;   currentBitmapWH = mNormalBitmapWH;   mTextPaint.setColor(mNormalTextColor);  }  lineStopX = lineStartX + mPreLineLength;  bitmapLeft = lineStopX - currentBitmapWH[0] / 2;  bitmapTop = lineStartY - currentBitmapWH[1] / 2;  canvas.drawBitmap(currentBitmap, bitmapLeft, bitmapTop, null);  mStepRectFs[i] = new RectF(bitmapLeft, bitmapTop, bitmapLeft + currentBitmapWH[0], bitmapTop + currentBitmapWH[1]);  if (mStepTexts != null) {//当没有传入对应的texts时不需要划线   drawText(canvas, i, bitmapLeft + currentBitmapWH[1] / 2, bitmapTop, currentBitmapWH[1]);//传入step中点坐标  }  lineStartX = lineStopX;  } }  private void drawText(Canvas canvas, int i, float x, float y, float bitmapH) {  String text = mStepTexts[i];  int[] textWH = getTextWH(text);  int textWidth = textWH[0];  int textHeight = textWH[1];  float bottom = 0;  if (mTextUpLine) {//画文本时的基准点是left.bottom,使其中心点与step的中心点对其  bottom = y - mTextLineMargin;  } else {  bottom = y + bitmapH + mTextLineMargin + textHeight;  }  canvas.drawText(text, x - textWidth / 2, bottom, mTextPaint); } 

@Override public boolean onTouchEvent(MotionEvent event) {  if (!mStepIsTouch) {//不能点击返回FALSE不处理  return false;  }  switch (event.getAction()) {  case MotionEvent.ACTION_DOWN:   float x = event.getX();   float y = event.getY();   int touchStep = getTouchStep(new PointF(x, y));//获取被点击的点的位置   if (touchStep != -1) {   mCurrentStep = touchStep + 1;   invalidate();   }   break;  }  return true; } 

private OnItemStepTouchListener mOnItemStepTouchListener;  public void setOnItemStepTouchListener(OnItemStepTouchListener onItemStepTouchListener) {  mOnItemStepTouchListener = onItemStepTouchListener; }  //每一个step的触摸监听 public interface OnItemStepTouchListener {  void onItemStepTouch(int postion); } 

//设置当前step public void setCurrentStep(int currentStep) {  mCurrentStep = currentStep;  invalidate(); } 

//设置step对应的texts public void setStepTexts(String[] stepTexts) {  mStepTexts = stepTexts;  mStepCount = mStepTexts.length;  mStepRectFs = new RectF[mStepCount];//初始化step所对应的矩阵数组，点击step时会用到，用于确定点击的是哪个step } 

public void setStepIsTouch(boolean stepIsTouch) {  mStepIsTouch = stepIsTouch; } 

public void setTextUpLine(boolean textUpLine) {  mTextUpLine = textUpLine;  invalidate(); }