优化3D效果

Author: CNCoderX

app/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
         applicationId "com.cncoderx.test.wheelview"
-        minSdkVersion 15
-        targetSdkVersion 24
+        minSdkVersion 14
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }

app/src/main/java/com/cncoderx/test/wheelview/MainActivity.java

@@ -62,7 +62,7 @@ public void onChanged(WheelView wheel, int oldIndex, int newIndex) {
         mYear = 1980;
         mMonth = 1;
         mDay = 1;
-//        updateDayEntries();
+        updateDayEntries();
         updateTextView();
     }
 

library/bintray.gradle

@@ -4,7 +4,7 @@ apply plugin: 'com.jfrog.bintray'
 def siteUrl = 'https://github.com/CNCoderX/WheelView'
 def gitUrl = 'https://github.com/CNCoderX/WheelView.git'
 
-version = "1.0"
+version = "1.1.0"
 group = "com.cncoderx.wheelview"
 def libName = "WheelView"
 def libDesc = "like ios wheel selector"

library/build.gradle

@@ -1,21 +1,29 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
-        minSdkVersion 15
-        targetSdkVersion 24
+        minSdkVersion 14
+        targetSdkVersion 25
         versionCode 1
-        versionName "1.0"
+        versionName "1.1.0"
     }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+//    compileOptions {
+//        sourceCompatibility JavaVersion.VERSION_1_8
+//        targetCompatibility JavaVersion.VERSION_1_8
+//    }
+    lintOptions {
+        abortOnError false
+        checkReleaseBuilds false
+    }
 }
 
 dependencies {

library/src/main/java/com/cncoderx/wheelview/Wheel3DView.java

@@ -100,9 +100,10 @@ protected void drawItem(Canvas canvas, int index, int offset) {
         // 滚动的距离映射到y轴的长度
         float translateY = (float) (Math.sin(angle) * r);
 
-        float scaleX = (float) Math.cos(angle / 3);
+        float scaleOffset = (float) Math.abs(Math.sin(angle / 2) * (itemHeight - getLineSpace()));
+
         // 折射偏移量x
-        float refractX = getRefractX();
+//        float refractX = getRefractX();
 
         int clipLeft = getPaddingLeft();
         int clipRight = getWidth() - getPaddingRight();
@@ -113,7 +114,7 @@ protected void drawItem(Canvas canvas, int index, int offset) {
         if (Math.abs(range) <= 0) {
             mPaint.setColor(getSelectedColor());
             canvas.save();
-            canvas.translate(refractX, 0);
+//            canvas.translate(refractX, 0);
             canvas.clipRect(clipLeft, upperLimit, clipRight, lowerLimit);
             drawText(canvas, text, translateX, translateY, rotate, 1);
             canvas.restore();
@@ -122,41 +123,41 @@ protected void drawItem(Canvas canvas, int index, int offset) {
         else if (range > 0 && range < itemHeight) {
             mPaint.setColor(getSelectedColor());
             canvas.save();
-            canvas.translate(refractX, 0);
+//            canvas.translate(refractX, 0);
             canvas.clipRect(clipLeft, upperLimit, clipRight, lowerLimit);
             drawText(canvas, text, translateX, translateY, rotate, 1);
             canvas.restore();
 
             mPaint.setColor(getUnselectedColor());
             canvas.save();
             canvas.clipRect(clipLeft, lowerLimit, clipRight, clipBottom);
-            drawText(canvas, text, translateX, translateY, rotate, scaleX);
+            drawText(canvas, text, translateX, translateY, rotate, scaleOffset);
             canvas.restore();
         }
         // 绘制与上分界线相交的文字
         else if (range < 0 && range > -itemHeight) {
             mPaint.setColor(getSelectedColor());
             canvas.save();
-            canvas.translate(refractX, 0);
+//            canvas.translate(refractX, 0);
             canvas.clipRect(clipLeft, upperLimit, clipRight, lowerLimit);
             drawText(canvas, text, translateX, translateY, rotate, 1);
             canvas.restore();
 
             mPaint.setColor(getUnselectedColor());
             canvas.save();
             canvas.clipRect(clipLeft, clipTop, clipRight, upperLimit);
-            drawText(canvas, text, translateX, translateY, rotate, scaleX);
+            drawText(canvas, text, translateX, translateY, rotate, scaleOffset);
             canvas.restore();
         } else {
             mPaint.setColor(getUnselectedColor());
             canvas.save();
             canvas.clipRect(clipLeft, clipTop, clipRight, clipBottom);
-            drawText(canvas, text, translateX, translateY, rotate, scaleX);
+            drawText(canvas, text, translateX, translateY, rotate, scaleOffset);
             canvas.restore();
         }
     }
 
-    private void drawText(Canvas canvas, CharSequence text, float translateX, float translateY, float rotate, float scale) {
+    private void drawText(Canvas canvas, CharSequence text, float translateX, float translateY, float rotate, float scaleOffset) {
         mCamera.save();
         mCamera.rotateX(rotate);
         mCamera.getMatrix(mMatrix);
@@ -166,7 +167,12 @@ private void drawText(Canvas canvas, CharSequence text, float translateX, float
         mMatrix.preTranslate(-centerX, -centerY);
         mMatrix.postTranslate(centerX + translateX, centerY + translateY);
 
-        canvas.scale(scale, 1, centerX, centerY);
+        final int width = canvas.getWidth();
+        final int height = canvas.getHeight();
+        float scaleX = (width - scaleOffset) / width;
+        float scaleY = (height - scaleOffset) / height;
+        canvas.scale(scaleX, scaleY, centerX, centerY);
+
         canvas.concat(mMatrix);
         canvas.drawText(text, 0, text.length(), centerX, centerY - baseline, mPaint);
     }