Android入门培训（测试实习生）
前一段时间给公司的测试实习生做了Android入门的培训。要讲的明白，确实需要查阅的东西比较多，现在将ppt分享出来。
Topics
1, Android verision ,developer history and version distribution
2, Basic concept (Activity, Service, Broadcast receiver, ContentProvider-Database)
3, Screen classification
4, Adb command
5, Log analysis
6, Signature
Android
1，mobile phone os (ios，wp，blackberry)
2，open source
3，2008年9月 android 1.0
4，75% （2012 Q3）
1-1 Android version
1-2 Developer history
1-3 Version distribution
1-4 What’s next
Android 5.0 (Key Lime Pie )
June 15, 2013~June 17, 2013
1-5 Reference
http://developer.android.com/about/dashboards/index.html
http://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels
2-1 Activity
2-2 service
(1) time consuming (download)
(2) stay in background (mp3)
2-3 Broadcast receiver
Global
(1) network connect state
(2) power boot
2-4 database
Add
Delete
Update
Select
2-5 Other proper
Sdk(Software Development Kit)
Demo
3-1 classification
(1) size
(2) density
3-2 Proper noun
(1) Screen size : diagonal length, inch
(2) Screen density: pots/inches
(3) Rosolution: width* height pots
(4) Density-independent pixel :dip
mdpi: 160dpi 1dip-1px
3-3 Size & density
xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp
3-4 Reference
http://developer.android.com/guide/practices/screens_support.html
4-1 adb
1，stands for android debug bridge
2， It is a client-server program
(1) client
(2) server
(3) daemon
4-2 adb category
4-3 adb command
4-3-1 check the connect state
adb devices
Q: can not connect
A: delete the Wandoujia process
adb kill-server
4-3-2 select device/emulator
adb �Cd
adb �Ce
adb �Cs <serialNumber>
4-3-3 install/uninstall
adb �Cs <serialNumber> <path_to_apk>
adb �Cd install <path_to_apk>
adb �Ce install <path_to_apk>
adb uninstall <package>
4-3-4 pull/push
adb pull <remote> <local>
adb push <local> <remote>
4-3-5 data
cd
cat sharedpreference
sqlite3 webview.db
.head on
select * from cookies;
4-3-6 process/memory usage
adb shell ps
user: root/system/media/ 进程拥有者的登录名
pid: process identity 进程id
name: path/package name
adb shell top
User 用户进程
System 系统进程
CPU使用情况（指一个最小时间片内所占时间，单位jiffies。或者指所占进程数）：
User 处于用户态的运行时间，不包含优先值为负进程
Nice 优先值为负的进程所占用的CPU时间
Sys 处于核心态的运行时间
Idle 除IO等待时间以外的其它等待时间
IOW IO等待时间
IRQ 硬中断时间
SIRQ 软中断时间
进程属性：
PID 进程在系统中的ID
CPU% 当前瞬时所以使用CPU占用率
S 进程的状态，其中S表示休眠，R表示正在运行，Z表示僵死状态，N表示该进程优先值是负数。
#THR 程序当前所用的线程数
VSS Virtual Set Size 虚拟耗用内存（包含共享库占用的内存）
RSS Resident Set Size 实际使用物理内存（包含共享库占用的内存）
PCY OOXX，不知道什么东东
UID 运行当前进程的用户id
adb shell
input text ‘the_input_content’
4-3-7 logcat
adb logcat
adb logcat �Cs <tag>
adb logcat �Cc
adb logcat > log_file.txt
adb logcat �Cv
cls
4-4 Reference
http://developer.android.com/tools/help/adb.html
5-1 Error type
Type:
(1)Force close
(2) Crash
(3)ANR(application not response)
5-2 FC
Caused by:
(1) Null pointer
(2) Missing resource
(3) Api
….
Location:
(1) AndroidRuntime
(2) has died
5-3 Crash
Direct close
Location:
log
Eg，/system/lib/libhwui.so
5-4 ANR
Conditions:
(1)No response to an input event (such as key press or screen touch events) within 5 seconds.
(2)A BroadcastReceiver hasn't finished executing within 10 seconds.
Location:
(1) log file
1-1 CPUusagefrom 3697ms to 4223ms later
1-2 100%TOTAL:4.8% user + 7.6% kernel + 87% iowait
cpu high: device is busy
cpu low: the main thread is blocked
iowait high: the main thread ‘s block may from io operation
(2) trace file (data/anr/trace)
stack
6-1 Signature
(1) identity
(2) apk upgrade (conflick )
(3) app module (theme, addon)
(4) Unique (apk changes, the signature invalid)