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@@ -0,0 +1,159 @@
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+package com.example.zhpan.circleviewpager.view;
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+
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+import android.content.Context;
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+import android.graphics.Bitmap;
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+import android.graphics.BitmapFactory;
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+import android.graphics.Canvas;
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+import android.graphics.Matrix;
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+import android.util.AttributeSet;
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+
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+import androidx.annotation.DrawableRes;
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+import androidx.annotation.Nullable;
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+
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+import com.zhpan.bannerview.indicator.BaseIndicatorView;
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+
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+/**
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+ * @ author : zhouweibin
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+ * @ time: 2019/12/18 17:04.
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+ * @ desc: 选中与未选中的图片长宽可能不一样
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+ **/
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+public class DrawableIndicator extends BaseIndicatorView {
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+ // 选中与未选中的图片
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+ private Bitmap mCheckedBitmap, mNormalBitmap;
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+ // 图片之间的间距
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+ private int mIndicatorPadding;
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+ // 选中图片的宽高
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+ private int mCheckedBitmapWidth, mCheckedBitmapHeight;
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+ //未选中图片的宽高
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+ private int mNormalBitmapWidth, mNormalBitmapHeight;
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+ private IndicatorSize mIndicatorSize;
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+
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+ public DrawableIndicator(Context context) {
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+ this(context, null);
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+ }
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+
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+ public DrawableIndicator(Context context, @Nullable AttributeSet attrs) {
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+ this(context, attrs, 0);
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+ }
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+
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+ public DrawableIndicator(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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+ super(context, attrs, defStyleAttr);
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+ }
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+
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+ @Override
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+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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+ super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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+ int maxHeight = Math.max(mCheckedBitmapHeight, mNormalBitmapHeight);
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+ int realWidth = mCheckedBitmapWidth + (mNormalBitmapWidth + mIndicatorPadding) * (getPageSize() - 1);
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+ setMeasuredDimension(realWidth, maxHeight);
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+ }
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+
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+ @Override
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+ protected void onDraw(Canvas canvas) {
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+ super.onDraw(canvas);
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+ if (getPageSize() > 1 || mCheckedBitmap == null || mNormalBitmap == null) {
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+ for (int i = 1; i < getPageSize() + 1; i++) {
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+ int left;
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+ int top;
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+ Bitmap bitmap = mNormalBitmap;
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+ int index = i - 1;
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+ if (index < getCurrentPosition()) {
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+ left = (i - 1) * (mNormalBitmapWidth + mIndicatorPadding);
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+ top = getMeasuredHeight() / 2 - mNormalBitmapHeight / 2;
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+ } else if (index == getCurrentPosition()) {
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+ left = (i - 1) * (mNormalBitmapWidth + mIndicatorPadding);
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+ top = getMeasuredHeight() / 2 - mCheckedBitmapHeight / 2;
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+ bitmap = mCheckedBitmap;
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+ } else {
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+ left = (i - 1) * mIndicatorPadding + (i - 2) * mNormalBitmapWidth + mCheckedBitmapWidth;
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+ top = getMeasuredHeight() / 2 - mNormalBitmapHeight / 2;
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+ }
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+ drawIcon(canvas, left, top, bitmap);
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+ }
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+ }
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+ }
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+
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+ private void drawIcon(Canvas canvas, int left, int top, Bitmap icon) {
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+ if (icon == null) {
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+ return;
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+ }
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+ canvas.drawBitmap(icon, left, top, null);
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+ }
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+
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+ private void initIconSize() {
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+ if (mCheckedBitmap != null) {
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+ if (mIndicatorSize != null) {
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+ if (mCheckedBitmap.isMutable()) {
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+ mCheckedBitmap.setWidth(mIndicatorSize.checkedWidth);
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+ mCheckedBitmap.setHeight(mIndicatorSize.checkedHeight);
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+ } else {
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+ int width = mCheckedBitmap.getWidth();
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+ int height = mCheckedBitmap.getHeight();
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+ float scaleWidth = ((float) (mIndicatorSize.checkedWidth) / width);
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+ float scaleHeight = ((float) (mIndicatorSize.checkedHeight) / height);
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+ Matrix matrix = new Matrix();
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+ matrix.postScale(scaleWidth, scaleHeight);
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+ mCheckedBitmap = Bitmap.createBitmap(mCheckedBitmap, 0, 0, width, height, matrix, true);
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+ }
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+ }
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+ mCheckedBitmapWidth = mCheckedBitmap.getWidth();
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+ mCheckedBitmapHeight = mCheckedBitmap.getHeight();
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+ }
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+
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+ if (mNormalBitmap != null) {
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+ if (mIndicatorSize != null) {
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+ if (mNormalBitmap.isMutable()) {
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+ mNormalBitmap.setWidth(mIndicatorSize.normalWidth);
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+ mNormalBitmap.setHeight(mIndicatorSize.normalHeight);
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+ } else {
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+ int width = mNormalBitmap.getWidth();
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+ int height = mNormalBitmap.getHeight();
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+ float scaleWidth = ((float) (mIndicatorSize.normalWidth) / mNormalBitmap.getWidth());
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+ float scaleHeight = ((float) (mIndicatorSize.normalHeight) / mNormalBitmap.getHeight());
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+ Matrix matrix = new Matrix();
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+ matrix.postScale(scaleWidth, scaleHeight);
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+ mNormalBitmap = Bitmap.createBitmap(mNormalBitmap, 0, 0, width, height, matrix, true);
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+ }
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+ }
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+ mNormalBitmapWidth = mNormalBitmap.getWidth();
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+ mNormalBitmapHeight = mNormalBitmap.getHeight();
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+ }
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+ }
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+
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+ public DrawableIndicator setIndicatorDrawable(@DrawableRes int normalDrawable, @DrawableRes int checkedDrawable) {
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+ mNormalBitmap = mCheckedBitmap = BitmapFactory.decodeResource(getResources(), normalDrawable);
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+ mCheckedBitmap = BitmapFactory.decodeResource(getResources(), checkedDrawable);
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+ initIconSize();
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+ postInvalidate();
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+ return this;
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+ }
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+
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+ public DrawableIndicator setIndicatorSize(int normalWidth, int normalHeight, int checkedWidth, int checkedHeight) {
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+ this.mIndicatorSize = new IndicatorSize(normalWidth, normalHeight, checkedWidth, checkedHeight);
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+ initIconSize();
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+ postInvalidate();
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+ return this;
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+ }
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+
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+ public DrawableIndicator setIndicatorGap(int padding) {
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+ if (padding >= 0) {
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+ mIndicatorPadding = padding;
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+ postInvalidate();
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+ }
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+ return this;
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+ }
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+
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+ static class IndicatorSize {
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+ int normalWidth;
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+ int checkedWidth;
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+ int normalHeight;
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+ int checkedHeight;
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+
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+ public IndicatorSize(int normalWidth, int normalHeight, int checkedWidth, int checkedHeight) {
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+ this.normalWidth = normalWidth;
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+ this.checkedWidth = checkedWidth;
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+ this.normalHeight = normalHeight;
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+ this.checkedHeight = checkedHeight;
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+ }
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+ }
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+}
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zhpanvip
