This document provides an overview of Android basics training content including activities, permissions, and asynchronous tasks. It discusses key concepts such as the lifecycle methods of activities like onCreate() and onPause(), how to define activities in AndroidManifest.xml, and the syntax and attributes of permission declarations. It also compares the Apache HTTP client and HttpURLConnection for making HTTP requests from Android.

1. Android
Basics
Training
linshen@meizu.com
http://linshen.me

2. About this site
developer.android.com

3. d.android.com
About this site

4. What you can learn
● Android
● Button TextView
●
●
● Android ——Volley
● Activity Permission
● UI Thread AsyncTask

5. What you can learn
Activity Permission

6. What you can learn
Activity

7. Activity
Activity
DEFINITION:
Usage:
● Activity
● onCreate() onPause()
● setContentView() ID
● AndroidManiest.xml
Activity

8. Activity
onCreate() onPause()

9. Activity
onCreate() onPause()

11. What you can learn
Activity Permission

12. What you can learn
Permission

13. <uses-permission android:name="string"
android:maxSdkVersion="integer" />
SYNTAX:
ATTRIBUTES:
● android:name
○ <permission>
● android:maxSdkVersion
○ API LEVEL API LEVEL
Permission

14. <uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Permission

15. What you can learn
● Android
● Button TextView
●
●
● Android ——Volley
● Activity Permission
● UI Thread AsyncTask

16. AsyncTask

18. Choose an HTTP Client
Apache HTTP Client VS. HttpURLConnection

19. Choose an HTTP Client
Apache HTTP Client

20. Apache HTTP Client
• DefaultHttpClient AndroidHttpClient
HTTP
• API bug
• Android
• Android 6.0 Android org.apache.http.* ( )

21. Choose an HTTP Client
Apache HTTP Client

22. Choose an HTTP Client
HttpURLConnection

23. HttpURLConnection
• Http Client
• API Android
• Android 2.3 HttpURLConnection bug
InputStream close()
• gzip

24. Start request
• delay Android UI
• crash
•
•
•

25. 2015.7.10 2500000000