我使用的这个片段,以检查是否安装了应用程序/活动:
i'm using this snippet to check if an app/activity is installed:
public static boolean isIntentAvailable(Context context, String action) { final PackageManager packageManager = context.getPackageManager(); final Intent intent = new Intent(action); List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); return list.size() > 0; } public static boolean isScanAvailable(Context context) { return isIntentAvailable(context, "com.google.zxing.client.android.SCAN"); }在上面的例子中它检查是否安装的C扫描仪应用的酒吧$ C $,它工作得很好。 不过,如果我尝试使用来检查的Adobe需要安装Flashplayer com.adobe.flashplayer 它不工作,并始终返回false。
In the above example it checks if the Barcode Scanner App is installed, which works just fine. However, if i try to check for the Adobe Flashplayer using com.adobe.flashplayer it doesn't work and always returns false.
有没有更好/更可靠的方法来检查闪光?
Is there a better / more reliable method to check for Flash?
推荐答案嗯是的。我的code以上贴确实意图检查未工作的flash播放器(没有公开意图我猜的)。
Uhm yeah. My code posted above does Intent checking which isn't working for the flashplayer (no public intents i guess).
更明显的方式是只使用 getPackageInfo()这工作得很好:
The more obvious way would be to just use getPackageInfo() which works just fine:
public static boolean isFlashAvailable(Context context) { String mVersion; try { mVersion = context.getPackageManager().getPackageInfo( "com.adobe.flashplayer", 0).versionName; Log.d("Flash", "Installed: " + mVersion); return true; } catch (NameNotFoundException e) { Log.d("Flash", "Not installed"); return false; } }
(作为额外的奖励,我们得到确切的版本号也是如此)
(As an added bonus we get the exact version number too)
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如何检查是否安装了Flash?
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