Android Interview Questions and Answers What is android?

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Android Interview Questions

1. The Intent Class
The Intent class has acquired two rather specialized factory methods. The method public static Intent makeMainActivity(ComponentName mainActivity) will return an Intent which can be used to launch an Application with the named main Activity. For example,
Intent i = Intent.makeMainActivity( new ComponentName(
"xper.honeycomb",
"xper.honycomb.XperActivity"));
System.out.println("action == " + i.getAction());
System.out.println("categories == " + i.getCategories());
System.out.println("component == " + i.getComponent());
System.out.println("flags == x" + Integer.toHexString(i.getFlags())); prints action == android.intent.action.MAIN categories == [android.intent.category.LAUNCHER] component == ComponentInfo{xper.honeycomb/xper.honycomb.XperActivity} flags == x The method public static Intent makeRestartActivityTask(ComponentName mainActivity) will return an Intent to relaunch an Application with the named main Activity. For example,
Intent j = Intent.makeRestartActivityTask( new ComponentName(
"xper.honeycomb",
"xper.honycomb.XperActivity"));
System.out.println("action == " + j.getAction());
System.out.println("categories == " + j.getCategories());

System.out.println("component == " + j.getComponent());
System.out.println("flags == x" + Integer.toHexString(j.getFlags())); prints action == android.intent.action.MAIN categories == [android.intent.category.LAUNCHER] component == ComponentInfo{xper.honeycomb/xper.honycomb.XperActivity} flags == x As can be seen the difference between the two methods is that the second one sets two flags,
Intent.FLAG_ACTIVITY_NEW_TASK(0x10000000) and
Intent.FLAG_ACTIVITY_CLEAR_TASK(0x00008000)) Quite why it is necessary to add two brand new methods for this purpose is not that obvious.

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