# adb and fastboot must know

Install [android SDK](https://developer.android.com/studio/index.html) (bottom of the page) or full [android studio](https://developer.android.com/studio/index.html) if you need to develop on android.


`fastboot` looks like `adb` but it is used when device is in `bootloader` (*or fastboot*).

## Check connected devices

### adb:
```bash
adb devices
```

### fastboot
```bash
fastboot devices
```

## Reboot

### normal reboot
```bash
adb reboot
```

### bootloader reboot
```bash
adb reboot bootloader
```

```bash
fastboot reboot-bootloader
```

### recovery reboot
```bash
adb reboot recovery
```

## Unlock / erase / flash

### unlock bootloader
```bash
fastboot oem unlock
```
> WARING: If you if you unlock the bootloader it will behave like a factory reset. So backup all your data before!

### lock bootloader
```bash
fastboot oem lock
```
> WARNING: If you lock back the bootloader, next time you need to unlock data will still behave like a factory reset

### erase
```bash
fastboot erase xxx
```

Erase partition xxx.
Partition could be:
- `boot`,
- `cache`,
- `recovery`
- `system`,
- `radio`,
- `userdata`,
- `bootloader`


### flash
```bash
fastboot flash xxx yyy
```

Flash partition xxx with new yyy.

For example:

- flash bootloader with a new bootloaler image:
  ```bash
  fastboot flash bootloader new_bootloader.img
  ```
- flash radio with a new radio image:
  ```bash
  fastboot flash radio new_radio.img
  ```
  
## File explorer
  
### Explore files (use linux commands)
  
```bash
adb shell
```

### copy files from computer to device

```bash
adb push FILE /sdcard
```

Copy a file `FILE` to device's sdcard.

### copy files from device to computer

```bash
adb pull FILE /some_computer_directory
```
Copy a file `FILE` to computer's directory

### remount

```bash
adb remount
```

### install apk
```bash
adb install file_name.apk 
```

## Backup and Restore (NO ROOT NEEDED)

### backup

When you launch a backup command a `password` for this backup will be asked.

#### backup all (*simple*)

```bash
adb backup -all
```

Note: backup `backup.ab` is placed inside `platform-tools` by default.

#### backup parametized (*less simple but accurate*)

```bash
adb backup -apk -shared -all -f computer_destination_directory\backup.ab
```
Parameters:
- `-apk` OR `_noapk`: 
  - include or not apk
- `-shared` OR `-noshared`: 
  - include or not files from `sdcard`
- `-all`
  - Save system files and applications files (wihtout apk files)
- `-f computer_destination_directory\backup.ab`
  - define a directory

### restore
```bash
adb retore computer_source_directory\backup.ab
```