[代码] java代码
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/**
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* Indicates whether the specified action can be used as an intent. This
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* method queries the package manager for installed packages that can
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* respond to an intent with the specified action. If no suitable package is
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* found, this method returns false.
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*
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* @param context The application's environment.
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* @param action The Intent action to check for availability.
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*
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* @return True if an Intent with the specified action can be sent and
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*responded to, false otherwise.
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*/
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public static boolean isIntentAvailable(Context context, String action) {
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final PackageManager packageManager = context.getPackageManager();
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final Intent intent = new Intent(action);
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List<ResolveInfo> list =
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packageManager.queryIntentActivities(intent,
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PackageManager.MATCH_DEFAULT_ONLY);
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return list.size() > 0;
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}
