在5.0和5.1中预置的apk是Launcher2，包名为com.android.launcher；从6.0开始模拟器中预置的apk是Launcher3，包名为com.android.launcher3。

可以通过命令查看Launcher的位置：

```Shell
adb shell pm path com.android.launcher
adb shell pm path com.android.launcher3
```

|  Android版本   |  Launcher位置  |
|  :----:  | ----  |
|  5.0   | /system/priv-app/Launcher2/Launcher2.apk |
|  5.1   | /system/priv-app/Launcher2/Launcher2.apk |
|  6.0   | /system/priv-app/Launcher3/Launcher3.apk |
|  7.0   | /system/priv-app/Launcher3/Launcher3.apk |
|  7.1   | /system/app/Launcher3/Launcher3.apk |
|  8.0   | /system/priv-app/Launcher3/Launcher3.apk |
|  8.1   | /system/priv-app/Launcher3/Launcher3.apk |
|  9.0   | /system/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  10.0  | /system/product/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  11.0  | /system_ext/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  12.0  | /system_ext/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  12.1  | /system_ext/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  13.0  | /system_ext/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |
|  14.0  | /system_ext/priv-app/Launcher3QuickStep/Launcher3QuickStep.apk |