There is something similar to the session under Android, called Application, getapplication () usage

There is something similar to the session on Android, called Application.
There is something similar to the session on Android, called Application.

1, you can create a new class, for example: Hellowordapplication.java must extends application (name with you)
In this class, set the data variables you want to be global, for example: private String loginName;
It then generates its get, set method.
2. Configure your application class in the Androidmanifest.xml file as follows:
<application android:icon= "@drawable/icon" android:label= "@string/app_name" Android:name= "hellowordapplication ">
<activity >
Slightly
</activity>
</application>
is to add the attribute configuration of android:name= "Hellowordapplication" to the <application> tag.
3, in the use of the time:
Hellowordapplicationapplication = (hellowordapplication) getapplication ();
Application.setloginname ("Baidu");
Then will "Baidu" saved to the application, other places to use when, application.getloginname ();

Android Getapplication () use

Java code

2. Package com.hyzing;
6. Import android.app.Application;
10. Public class Mysystemappcation extends application{
12. private int curindex;
16. public int Getcurindex () {
18. return curindex;
20. }
24. public void Setcurindex (int curindex) {
26. this.curindex = Curindex;
28. }
32. @Override
34. public void OnCreate () {
36. super.oncreate ();
38. }
42. @Override
44. public void Onterminate () {
46. super.onterminate ();
48. }
50. }

Java code

2. Package com.hyzing;
4. Import android.app.Activity;
6. Import android.content.Intent;
8. Import Android.os.Bundle;
10. Import Android.util.Log;
14. Public class Systemtestactivity extends Activity {
16. @Override
18. public void OnCreate (Bundle savedinstancestate) {
20. super.oncreate (savedinstancestate);
22. //setcontentview (R.layout.main);
24. Mysystemappcation application = (mysystemappcation) This
26. . Getapplication ();
28. System.out.println ("++++++++++++++" +application);
30. LOG.I ("Data", "===============" + Application.getcurindex ());
32. Application.setcurindex (5);
34. Intent Intent = new Intent ();
36. Bundle bundle = new bundle ();
38. Bundle.putstring ("CheckIn", "0");
40. Bundle.putboolean ("Manageruser", true);
42. Intent.putextras (bundle);
44. Intent.setclass (<span style="color: #ff0000;" >systemtestactivity. This</span>, printactivity.  class);
46. StartActivity (Intent);
50. }
52. }

Java code

2. Package com.hyzing;
6. Import android.app.Activity;
8. Import android.content.Intent;
10. Import Android.os.Bundle;
12. Import Android.util.Log;
16. Public class Printactivity extends Activity {
20. @Override
22. protected void OnCreate (Bundle savedinstancestate) {
24. <span style="color: #ff0000;" >super.oncreate (savedinstancestate);</span>
26. Mysystemappcation application = (mysystemappcation) This
28. . Getapplication ();
30. LOG.I ("Data", " " "+ Application.getcurindex ());
32. Application.setcurindex (6);
34. Intent Intent = new Intent ();
36. Bundle bundle = new bundle ();
38. Bundle.putstring ("CheckIn", "0");
40. Bundle.putboolean ("Manageruser", true);
42. Intent.putextras (bundle);
44. Intent.setclass (printactivity. This, printagainactivity.  class);
46. StartActivity (Intent);
48. }
50. }

Java code

2. Package com.hyzing;
6. Import android.app.Activity;
8. Import Android.os.Bundle;
10. Import Android.util.Log;
14. Public class Printagainactivity extends Activity {
18. @Override
20. protected void OnCreate (Bundle savedinstancestate) {
22. <span style="color: #ff0000;" >super.oncreate (savedinstancestate);</span>
24. Final Mysystemappcation application = (mysystemappcation) This
26. . Getapplication ();
28. LOG.I ("Data", " " "+ Application.getcurindex ());
32. }
36. }

Java code

2. <?xml version="1.0" encoding="Utf-8"?>
4. <manifest xmlns:android="Http://schemas.android.com/apk/res/android"
6. package="com.hyzing"
8. android:versioncode="1"
10. Android:versionname="1.0" >
14. <uses-sdk android:minsdkversion="/> "
16. <application android:name=". Mysystemappcation "
18. android:icon="@drawable/ic_launcher"
20. Android:label="@string/app_name" >
22. <activity
24. Android:name=". Systemtestactivity "
26. Android:label="@string/app_name" >
28. <intent-filter>
30. <action android:name="Android.intent.action.MAIN"/>
32. <category android:name="Android.intent.category.LAUNCHER"/>
34. </intent-filter>
36. </activity>
38. <activity
40. Android:name=". Printactivity "
42. Android:label="@string/app_name" >
44. </activity>
46. <activity
48. Android:name=". Printagainactivity "
50. Android:label="@string/app_name" >
52. </activity>
56. </application>
60. </manifest>

There is something similar to the session under Android, called Application, getapplication () usage