Android，android官網

Android，android官網
判斷intent-filter的特定的action

本文地址：http://blog.csdn.net/caroline_wendy

如果使用startIntent()啟動Activity時，如果intent-filter中未包含此action，則會異常崩潰；在使用時，可以先進行檢查：

    // 判斷是否安裝【健康工具】    private boolean isInstallChunyuTools() {        Intent cardioFaceIntent = new Intent(EtonConstants.CHUNYU_CARDIO_FACE_ACTION);        Intent pedometerIntent = new Intent(EtonConstants.CHUNYU_PEDOMETER_ACTION);        PackageManager pm = getPackageManager();        List<ResolveInfo> cardioFaceInfos =                pm.queryIntentActivities(cardioFaceIntent, PackageManager.GET_RESOLVED_FILTER);        List<ResolveInfo> pedometerInfos =                pm.queryIntentActivities(pedometerIntent, PackageManager.GET_RESOLVED_FILTER);        return cardioFaceInfos.isEmpty() || pedometerInfos.isEmpty();    }

參考：http://stackoverflow.com/questions/20809237/android-search-installed-package-with-intent-filter
heck out queryIntentActivities()So you create an intent with the correct filter matching discriminators on it.

Intent intent = new Intent("my_awesome.package.hasa.custom.ACTION!");intent.addCategory("typingisfunfunfun");intent.setData(Uri.parse("data://foo/bar"));PackageManager pm = getPackageManager();List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, PackageManager.GET_RESOLVED_FILTER);if(resolveInfo.isEmpty()) {  Log.i("NoneResolved", "No Activities");} else {  Log.i("Resolved!", "There are activities" + resolveInfos);}