logcat日志输出信息：
10-25 05:05:41.737 28659-28659/net.chiangfai I/dalvikvm: Could not find method android.content.res.Resources.getDrawable, referenced from method android.support.v7.widget.ResourcesWrapper.getDrawable 10-25 05:05:41.737 28659-28659/net.chiangfai W/dalvikvm: VFY: unable to resolve virtual method 702: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable; 10-25 05:05:41.737 28659-28659/net.chiangfai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002 10-25 05:05:41.737 28659-28659/net.chiangfai I/dalvikvm: Could not find method android.content.res.Resources.getDrawableForDensity, referenced from method android.support.v7.widget.ResourcesWrapper.getDrawableForDensity 10-25 05:05:41.737 28659-28659/net.chiangfai W/dalvikvm: VFY: unable to resolve virtual method 704: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable; 10-25 05:05:41.737 28659-28659/net.chiangfai D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002 10-25 05:05:41.745 28659-28659/net.chiangfai E/dalvikvm: Could not find class ‘android.graphics.drawable.RippleDrawable‘, referenced from method android.support.v7.widget.AppCompatImageHelper.hasOverlappingRendering
原因：出现以上情况，是因为代码所调用的一些方法只能在较高的API level（高于minSdkVersion）上使用，而调试用的机子或模拟器所用的SDK Version小于该API level
解决来源：http://blog.csdn.net/jiawei6212130/article/details/52302432
E/dalvikvm: Could not find class...
原文：http://www.cnblogs.com/chiangfai/p/5996345.html