我正在使用一种方法来检测Android设备上的pdf支持情况，如下所示publicbooleancanDisplayPdf(){PackageManagerpackageManager=application.getPackageManager();IntenttestIntent=newIntent(Intent.ACTION_VIEW);testIntent.setType("application/pdf");if(packageManager.queryIntentActivities(testIntent,PackageManager.MATCH_DEFAULT_ONLY).