优化Tab的自定义性，可直接继承操作paint；增加自定义字体的示例

XuQK · Mar 5, 2021 · eb825b3 · eb825b3
1 parent c17ffdd
commit eb825b3
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Showing 4 changed files with 41 additions and 14 deletions.
diff --git a/app/src/main/assets/chilanka.otf b/app/src/main/assets/chilanka.otf
diff --git a/app/src/main/java/github/xuqk/kdtablayout/sample/ScrollableTabActivity.kt b/app/src/main/java/github/xuqk/kdtablayout/sample/ScrollableTabActivity.kt
@@ -6,8 +6,8 @@ import android.view.animation.AccelerateInterpolator
 import android.view.animation.DecelerateInterpolator
 import androidx.appcompat.app.AppCompatActivity
 import github.xuqk.kdtablayout.KDTabAdapter
-import github.xuqk.kdtablayout.KDTabLayout
 import github.xuqk.kdtablayout.sample.adapter.ViewPager2Adapter
+import github.xuqk.kdtablayout.sample.widget.CustomFontTab
 import github.xuqk.kdtablayout.widget.KDTab
 import github.xuqk.kdtablayout.widget.KDTabIndicator
 import github.xuqk.kdtablayout.widget.indicator.KDRecIndicator
@@ -159,7 +159,7 @@ class ScrollableTabActivity : AppCompatActivity() {
 
         tab5.contentAdapter = object : KDTabAdapter() {
             override fun createTab(position: Int): KDTab? {
-                return KDColorMorphingTextTab(this@ScrollableTabActivity, ZH[position]).apply {
+                return CustomFontTab(this@ScrollableTabActivity, EN[position]).apply {
                     horizontalPadding = 16f
                     selectedTextColor = Color.parseColor("#673ab7")
                     normalTextColor = Color.parseColor("#9ccc65")
@@ -178,7 +178,7 @@ class ScrollableTabActivity : AppCompatActivity() {
             }
 
             override fun getTabCount(): Int {
-                return ZH.size
+                return EN.size
             }
         }
 

diff --git a/app/src/main/java/github/xuqk/kdtablayout/sample/widget/CustomFontTab.kt b/app/src/main/java/github/xuqk/kdtablayout/sample/widget/CustomFontTab.kt
@@ -0,0 +1,26 @@
+package github.xuqk.kdtablayout.sample.widget
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.Typeface
+import github.xuqk.kdtablayout.widget.tab.KDColorMorphingTextTab
+
+/**
+ * Created By：XuQK
+ * Created Date：21-3-5 下午2:57
+ * Creator Email：[email protected]
+ * Description：
+ */
+
+@SuppressLint("ViewConstructor")
+class CustomFontTab(context: Context, text: String) : KDColorMorphingTextTab(context, text) {
+
+    private val customTypeface by lazy {
+        Typeface.createFromAsset(context.assets, "chilanka.otf")
+    }
+
+    override fun setPaintParam() {
+        super.setPaintParam()
+        paint.typeface = customTypeface
+    }
+}
diff --git a/kdtablayout/src/main/java/github/xuqk/kdtablayout/widget/tab/KDSizeMorphingTextTab.kt b/kdtablayout/src/main/java/github/xuqk/kdtablayout/widget/tab/KDSizeMorphingTextTab.kt
@@ -5,14 +5,10 @@ import android.content.Context
 import android.graphics.Canvas
 import android.graphics.Paint
 import android.graphics.Typeface
-import android.graphics.fonts.FontFamily
-import android.widget.TextView
 import androidx.annotation.ColorInt
-import github.xuqk.kdtablayout.KDTabLayout
 import github.xuqk.kdtablayout.dpToPx
 import github.xuqk.kdtablayout.getBaselineToCenter
 import github.xuqk.kdtablayout.widget.KDTab
-import kotlin.math.max
 
 /**
  * Created By：XuQK
@@ -86,7 +82,8 @@ open class KDSizeMorphingTextTab(context: Context, text: String) :
     }
 
     override fun computeContentBounds() {
-        paint.getTextBounds(text, 0, text.length, contentRect)
+        setPaintParam()
+
         val contentWidth = contentRect.width()
         val contentHeight = contentRect.height()
         contentRect.left = left + (width - contentWidth) / 2
@@ -96,8 +93,8 @@ open class KDSizeMorphingTextTab(context: Context, text: String) :
     }
 
     override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
-        paint.textSize = dpToPx(context, max(selectedTextSize, normalTextSize)).toFloat()
-        paint.typeface = if (bold) Typeface.DEFAULT_BOLD else Typeface.DEFAULT
+        setPaintParam()
+
         val w = paint.measureText(text) + dpToPx(context, horizontalPadding) * 2
         setMeasuredDimension(
             resolveSizeAndState(w.toInt(), widthMeasureSpec, 0),
@@ -106,15 +103,19 @@ open class KDSizeMorphingTextTab(context: Context, text: String) :
     }
 
     override fun drawContent(canvas: Canvas) {
+        setPaintParam()
+
+        paint.getFontMetrics(fontMetrics)
+        val baselineY = fontMetrics.getBaselineToCenter() + height / 2
+        canvas.drawText(text, (width / 2).toFloat(), baselineY, paint)
+    }
+
+    protected open fun setPaintParam() {
         paint.reset()
         paint.isAntiAlias = true
         paint.textSize = dpToPx(context, textSize).toFloat()
         paint.color = textColor
         paint.typeface = if (bold) Typeface.DEFAULT_BOLD else Typeface.DEFAULT
         paint.textAlign = Paint.Align.CENTER
-        paint.getFontMetrics(fontMetrics)
-
-        val baselineY = fontMetrics.getBaselineToCenter() + height / 2
-        canvas.drawText(text, (width / 2).toFloat(), baselineY, paint)
     }
 }