I'm using this block of code to launch the default Alarm Clock when tapping on my clock widget.
public Intent getAlarmPackage(Context context)
{
PackageManager packageManager = context.getPackageManager();
Intent AlarmClockIntent = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_LAUNCHER);
String clockImpls[][] = {
{ "Standard Alarm", "com.android.alarmclock",
"com.android.alarmclock.AlarmClock" },
{ "HTC Alarm ClockDT", "com.htc.android.worldclock",
"com.htc.android.worldclock.WorldClockTabControl" },
{ "Standard Alarm ClockDT", "com.android.deskclock",
"com.android.deskclock.AlarmClock" },
{ "Froyo Nexus Alarm ClockDT",
"com.google.android.deskclock",
"com.android.deskclock.DeskClock" },
{ "Moto Blur Alarm ClockDT",
"com.motorola.blur.alarmclock",
"com.motorola.blur.alarmclock.AlarmClock" },
{ "Samsung Galaxy S", "com.sec.android.app.clockpackage",
"com.sec.android.app.clockpackage.ClockPackage" } };
But this is not working with the Sony Xperia Z. Any suggestions?