How to end all activity in Android development

Each activity has its own life cycle, which is opened and eventually closed.

Four ways to end the current activity

Java code

1. Close the current Activity method one
2. Finish ();
4. Close the current interface method two
5. Android.os.Process.killProcess (Android.os.Process.myPid ());
7. Close the current interface method three
8. System.exit (0);
10. Close the current interface method four
11. This.ondestroy ();

But if four activity:a,b,c and d have been activated,

In D activity, you want to start another activity B, but not become a a,b,c,d,b, but hope is a, B, and the data is still retained

Java code

1. Intent Intent = new Intent ();
2. Intent.setclass (tableactivity. This, frameactivity.  class);
3. Intent.addflags (Intent.flag_activity_single_top); //Set do not refresh the interface that will be skipped
4. Intent.setflags (Intent.flag_activity_clear_top); //It can turn off activity in the middle of the desired interface
5. StartActivity (Intent);

If four activity:a,b,c and d have been started,

In D activity, want to start another activity B, but not become a,b,c,d,b, but hope is a A, and B data does not retain

Java code

1. Intent Intent = new Intent ();
2. Intent.setclass (tableactivity. This, frameactivity.  class);
3. Intent.setflags (Intent.flag_activity_clear_top); //It can turn off activity in the middle of the desired interface
4. StartActivity (Intent);

If four activity:a,b,c and d have been started, in D activity,
/Want to start another Activity B, but not become a,b,c,d,b, but hope is a,c,d,b, you can write code like this:

Java code

1. Intent intent1 = new Intent (tableactivity. This, frameactivity.    class);
2. Intent1.addflags (Intent.flag_activity_reorder_to_front);
3. StartActivity (INTENT1);

If you have started four activity:a,b,c and D, in D activity, you want to shut down all activity at once .

Create a class that is designed to handle activity

Java code

2. Package com.layout;
6. Import java.util.LinkedList;
8. Import java.util.List;
10. Import android.app.Activity;
12. Import android.app.Application;
14. /**
16. * A class used to end all background activity
18. * @author Administrator
20. *
22. */
24. Public class Sysapplication extends application {
26. //Use list to save each activity is the key
28. private List<activity> mlist = new linkedlist<activity> ();
30. //In order to implement static objects created every time you use the class without creating a new object
32. private static sysapplication instance;
34. //Construction method
36. Private Sysapplication () {}
38. //Instantiate once
40. public synchronized static Sysapplication getinstance () {
42. if (null = = instance) {
44. Instance = new Sysapplication ();
46. }
48. return instance;
50. }
52. //Add Activity
54. public void addactivity (activity activity) {
56. Mlist.add (activity);
58. }
60. //close activity in each list
62. public Void exit () {
64. try {
66. For (Activity activity:mlist) {
68. if (activity! = null)
70. Activity.finish ();
72. }
74. } catch (Exception e) {
76. E.printstacktrace ();
78. } finally {
80. System.exit (0);
82. }
84. }
86. //Kill process
88. public void Onlowmemory () {
90. super.onlowmemory ();
92. System.GC ();
94. }
96. }

When each activity is created, add the

Java code

1. Sysapplication.getinstance (). Addactivity (this);

Add the activity to the list.

When you want to close, call the Sysapplication exit method

Java code

1. Close the entire program
2. Sysapplication.getinstance (). exit ();

How to end all activity in Android development