add version judgment

Solartisan · Sep 17, 2016 · 26afab9 · 26afab9
1 parent 6ce9f61
commit 26afab9
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Showing 2 changed files with 4 additions and 2 deletions.
diff --git a/README.md b/README.md
@@ -2,7 +2,6 @@ WaveSideBar project
 ===================
 
 一个快速跳跃分组的侧边栏控件，示例中配合RecyclerView实现。
-因为控件中使用了`path.op`，所以level>=19，如在项目中使用，请自行修改该处实现以兼容更低版本。
 
 <img src="./preview/simple.gif">
 

diff --git a/wave/src/main/java/cc/solart/wave/WaveSideBarView.java b/wave/src/main/java/cc/solart/wave/WaveSideBarView.java
@@ -8,6 +8,7 @@
 import android.graphics.Paint;
 import android.graphics.Path;
 import android.graphics.RectF;
+import android.os.Build;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
@@ -293,7 +294,9 @@ private void drawBallPath(Canvas canvas) {
 
         mBallPath.reset();
         mBallPath.addCircle(mBallCentreX, mCenterY, mBallRadius, Path.Direction.CW);
-        mBallPath.op(mWavePath, Path.Op.DIFFERENCE);
+        if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.KITKAT) {
+            mBallPath.op(mWavePath, Path.Op.DIFFERENCE);
+        }
 
         mBallPath.close();
         canvas.drawPath(mBallPath, mWavePaint);