/** 设置选中状态下按钮的背景颜色 */
public void setSelectedBackgroundColors(int backgroundColors) {
mSelectedBackgroundColors = backgroundColors;
if (mBackgroundDrawable != null) {
mBackgroundDrawable.setStrokeColor(backgroundColors);
}
if (mSelectedDrawable != null) {
mSelectedDrawable.setColor(backgroundColors);
}
mPaint.setColor(backgroundColors);
invalidate();
}
public void setCornerRadius(int cornerRadius) {
mCornerRadius = cornerRadius;
if (mBackgroundDrawable != null) {
mBackgroundDrawable.setRadius(cornerRadius);
}
invalidate();
}
public SegmentControl(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.SegmentControl);
String textArray = ta.getString(R.styleable.SegmentControl_texts);
if (textArray != null) {
mTexts = textArray.split("\\|");
}
mTextSize =
ta.getDimensionPixelSize(
R.styleable.SegmentControl_android_textSize,
(int)
TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 14, context.getResources().getDisplayMetrics()));
mSelectedBackgroundColors =
ta.getColor(R.styleable.SegmentControl_selectedBackgroundColors, 0xffffffff);
mSelectedTextColors = ta.getColor(R.styleable.SegmentControl_selectedTextColors, 0xffffffff);
mCornerRadius =
ta.getDimensionPixelSize(
R.styleable.SegmentControl_cornerRadius,
(int)
TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, 5, context.getResources().getDisplayMetrics()));
mDirection = Direction.values()[ta.getInt(R.styleable.SegmentControl_direction, 0)];
mHorizonGap = ta.getDimensionPixelSize(R.styleable.SegmentControl_horizonGap, 0);
mVerticalGap = ta.getDimensionPixelSize(R.styleable.SegmentControl_verticalGap, 0);
mCurrentIndex = ta.getInt(R.styleable.SegmentControl_selectedIndex, 0); // 默认选中第一个
if (mTexts != null && mTexts.length > 0 && mCurrentIndex > mTexts.length - 1) {
mCurrentIndex = mTexts.length - 1;
}
int gap =
ta.getDimensionPixelSize(
R.styleable.SegmentControl_gaps,
(int)
TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, 2, context.getResources().getDisplayMetrics()));
if (mHorizonGap == 0) mHorizonGap = gap;
if (mVerticalGap == 0) mVerticalGap = gap;
ta.recycle();
mBackgroundDrawable = new RadiusDrawable(mCornerRadius, true, 0);
mBackgroundDrawable.setStrokeWidth(2);
mBackgroundDrawable.setStrokeColor(mSelectedBackgroundColors);
if (Build.VERSION.SDK_INT < 16) {
setBackgroundDrawable(mBackgroundDrawable);
} else {
setBackground(mBackgroundDrawable);
}
mSelectedDrawable = new RadiusDrawable(mCornerRadius, false, mSelectedBackgroundColors);
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setTextSize(mTextSize);
mPaint.setColor(mSelectedBackgroundColors);
// here's the tricky thing, when you doing a click detect on a capacitive touch screen,
// sometimes the touch points of touchDown and touchUp are different(it's call slop) even when
// you didn't actually move your finger,
// so we set a distance limit for the distance of this two touch points to create a better user
// experience;
int touchSlop = 0;
if (context == null) {
touchSlop = ViewConfiguration.getTouchSlop();
} else {
final ViewConfiguration config = ViewConfiguration.get(context);
touchSlop = config.getScaledTouchSlop();
}
mTouchSlop = touchSlop * touchSlop;
inTapRegion = false;
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mTexts != null && mTexts.length > 0) {
for (int i = 0; i < mTexts.length; i++) {
// draw separate lines
if (i < mTexts.length - 1) {
mPaint.setColor(mSelectedBackgroundColors);
mPaint.setStrokeWidth(2);
if (mDirection == Direction.HORIZON) {
canvas.drawLine(mCacheBounds[i].right, 0, mCacheBounds[i].right, getHeight(), mPaint);
} else {
canvas.drawLine(
mCacheBounds[i].left,
mSingleChildHeight * (i + 1),
mCacheBounds[i].right,
mSingleChildHeight * (i + 1),
mPaint);
}
}
// draw selected drawable
if (i == mCurrentIndex && mSelectedDrawable != null) {
int topLeftRadius = 0;
int topRightRadius = 0;
int bottomLeftRadius = 0;
int bottomRightRadius = 0;
if (mDirection == Direction.HORIZON) {
if (i == 0) {
topLeftRadius = mCornerRadius;
bottomLeftRadius = mCornerRadius;
}
if (i == mTexts.length - 1) {
topRightRadius = mCornerRadius;
bottomRightRadius = mCornerRadius;
}
} else {
if (i == 0) {
topLeftRadius = mCornerRadius;
topRightRadius = mCornerRadius;
}
if (i == mTexts.length - 1) {
bottomLeftRadius = mCornerRadius;
bottomRightRadius = mCornerRadius;
}
}
mSelectedDrawable.setRadiuses(
topLeftRadius, topRightRadius, bottomLeftRadius, bottomRightRadius);
mSelectedDrawable.setBounds(mCacheBounds[i]);
mSelectedDrawable.draw(canvas);
mPaint.setColor(mSelectedTextColors);
} else {
mPaint.setColor(mSelectedBackgroundColors);
}
// draw texts
canvas.drawText(
mTexts[i],
mCacheBounds[i].left + (mSingleChildWidth - mTextBounds[i].width()) / 2,
mCacheBounds[i].top + (mSingleChildHeight - mPaint.ascent() - mPaint.descent()) / 2,
mPaint);
}
}
}
