load pdf error

[gao746700783]

E/dalvikvm: Could not find class 'android.util.ArrayMap', referenced from method com.shockwave.pdfium.PdfDocument.
08-28 21:21:43.369 3565-4232/com.router.report W/dalvikvm: VFY: unable to resolve new-instance 2372 (Landroid/util/ArrayMap;) in Lcom/shockwave/pdfium/PdfDocument;
08-28 21:21:43.369 3565-4232/com.router.report D/dalvikvm: VFY: replacing opcode 0x22 at 0x0003
08-28 21:21:43.369 3565-4232/com.router.report D/dalvikvm: DexOpt: unable to opt direct call 0x4da1 at 0x05 in Lcom/shockwave/pdfium/PdfDocument;.
08-28 21:21:43.409 3565-3565/com.router.report E/PdfDetailActivity: android.util.ArrayMap