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package cgeo.geocaching.utils;
import cgeo.geocaching.CgeoApplication;
import org.apache.commons.collections4.CollectionUtils;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import java.util.List;
public final class ProcessUtils {
private ProcessUtils() {
// utility class
}
/**
* Preferred method to detect the availability of an external app
*
* @param packageName
* @return
*/
public static boolean isLaunchable(final String packageName) {
return getLaunchIntent(packageName) != null;
}
/**
* Checks whether a launch intent is available or if the package is just installed
* This function is relatively costly, so if you know that the package in question has
* a launch intent, use isLaunchable() instead.
*
* @param packageName
* @return
*/
public static boolean isInstalled(final String packageName) {
return isLaunchable(packageName) || hasPackageInstalled(packageName);
}
/**
* This will find installed applications even without launch intent (e.g. the streetview plugin).
*/
private static boolean hasPackageInstalled(final String packageName) {
final List<PackageInfo> packs = CgeoApplication.getInstance().getPackageManager().getInstalledPackages(0);
for (final PackageInfo packageInfo : packs) {
if (packageName.equals(packageInfo.packageName)) {
return true;
}
}
return false;
}
/**
* This will find applications, which can be launched.
*/
public static Intent getLaunchIntent(final String packageName) {
if (packageName == null) {
return null;
}
final PackageManager packageManager = CgeoApplication.getInstance().getPackageManager();
try {
// This can throw an exception where the exception type is only defined on API Level > 3
// therefore surround with try-catch
return packageManager.getLaunchIntentForPackage(packageName);
} catch (final Exception ignored) {
return null;
}
}
public static boolean isIntentAvailable(final String intent) {
return isIntentAvailable(intent, null);
}
/**
* Indicates whether the specified action can be used as an intent. This
* method queries the package manager for installed packages that can
* respond to an intent with the specified action. If no suitable package is
* found, this method returns false.
*
* @param action
* The Intent action to check for availability.
* @param uri
* The Intent URI to check for availability.
*
* @return True if an Intent with the specified action can be sent and
* responded to, false otherwise.
*/
public static boolean isIntentAvailable(final String action, final Uri uri) {
final PackageManager packageManager = CgeoApplication.getInstance().getPackageManager();
final Intent intent;
if (uri == null) {
intent = new Intent(action);
} else {
intent = new Intent(action, uri);
}
final List<ResolveInfo> list = packageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
final List<ResolveInfo> servicesList = packageManager.queryIntentServices(intent,
PackageManager.MATCH_DEFAULT_ONLY);
return CollectionUtils.isNotEmpty(list) || CollectionUtils.isNotEmpty(servicesList);
}
}
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