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# awesome-adb
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Adb 用法大全。
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## 目录
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* [查看手机型号](#查看手机型号)
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* [查看手机电池状况](#查看手机电池状况)
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* [查看手机分辨率](#查看手机分辨率)
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* [查看 android\_id](#查看-android_id)
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* [录制屏幕](#录制屏幕)
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* [查看前台 Activity](#查看前台-activity)
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### 查看手机型号
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命令:
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```
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adb shell getprop ro.product.model
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```
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输出示例:
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```
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Nexus 5
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```
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### 查看手机电池状况
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命令:
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```
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adb shell dumpsys battery
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```
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输入示例:
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```
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Current Battery Service state:
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AC powered: false
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USB powered: true
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Wireless powered: false
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status: 2
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health: 2
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present: true
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level: 44
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scale: 100
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voltage: 3872
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temperature: 280
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technology: Li-poly
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```
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其中 `scale` 代表最大电量,`level` 代表当前电量。上面的输出表示还剩下 44% 的电量。
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### 查看手机分辨率
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命令:
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```
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adb shell dumpsys window displays
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```
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输出示例:
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```
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WINDOW MANAGER DISPLAY CONTENTS (dumpsys window displays)
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Display: mDisplayId=0
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init=1080x1920 480dpi cur=1080x1920 app=1080x1776 rng=1080x1005-1794x1701
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deferred=false layoutNeeded=false
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...
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// some other output here
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...
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```
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### 查看 android\_id
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命令:
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```
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adb shell settings get secure android_id
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```
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输出示例:
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```
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51b6be48bac8c569
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```
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### 录制屏幕
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录制屏幕以 mp4 格式保存到 /sdcard:
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```
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adb shell screenrecord /sdcard/filename.mp4
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```
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需要停止时按 <kbd>Ctrl-C</kbd>,默认录制时间和最长录制时间都是 180 秒。
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如果需要导出到电脑:
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```
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adb pull /sdcard/filename.mp4
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```
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`screenrecord` 命令也支持一些参数,可以使用 `adb shell screenrecord --help` 查看,下面是简介:
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| 参数 | 含义 |
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|:--------------------|:------------------------------------------------|
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| --size WIDTHxHEIGHT | 视频的尺寸,比如 `1280x720`,默认是屏幕分辨率。 |
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| --bit-rate RATE | 视频的比特率,默认是 4Mbps。 |
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| --time-limit TIME | 录制时长,单位秒。 |
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| --verbose | 输出更多信息。 |
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### 查看前台 Activity
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命令:
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```
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adb shell dumpsys activity activities | grep mFocusedActivity
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```
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输出示例:
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```
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mFocusedActivity: ActivityRecord{8079d7e u0 com.cyanogenmod.trebuchet/com.android.launcher3.Launcher t42}
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```
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其中的 `com.cyanogenmod.trebuchet/com.android.launcher3.Launcher` 就是当前处于前台的 Activity。
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