Android平台能否修改及自定义Bluetooth与BLE配对对话框中的passkey文本？

Hey there! Both of your requested customizations are absolutely achievable, but they require system-level access since these are core Android UI elements. Let’s break down each scenario:

1. Modifying the passkey text in Android’s Bluetooth dialog #

Yes, you can customize this text, but the approach varies based on your setup:

• Custom ROM development: If you’re building your own Android ROM, navigate to the system Bluetooth app directory (usually packages/apps/Bluetooth). Look for the string resources file (res/values/strings.xml) and locate the key corresponding to the passkey dialog text (common keys might look like bluetooth_pairing_passkey or similar). Edit the string value, then recompile the system and flash it to your device.
• Rooted device: For a rooted device, you have two main options:
  • Extract the Bluetooth.apk from your system partition, modify its string resources using a tool like APK Editor, re-sign the APK, and push it back to the system.
  • Use an Xposed or LSPosed module to hook the Bluetooth dialog’s UI rendering method and dynamically replace the passkey text at runtime.
• Important note: Non-rooted third-party apps cannot modify this dialog—Android’s permission model restricts access to system-level UI elements for regular apps.

2. Changing the "Try 0000 and 1234" prompt in BLE pairing dialogs #

This customization is also possible, with similar requirements to the first question:

• Custom ROM development: This text is typically stored in either the system framework resources or the Bluetooth app’s strings. Search through frameworks/base/core/res/res/values/strings.xml or the Bluetooth app’s strings file for the exact phrase "Try 0000 and 1234" (or its corresponding string key). Update the value and recompile the ROM.
• Rooted device:
  • If the text is in framework-res.apk, extract this file, modify the relevant string resource, re-sign it, and replace the system’s version.
  • Use a module (Xposed/LSPosed) to intercept the dialog creation call and swap out the default prompt text with your custom one.
• Device-specific note: Some manufacturers customize these system dialogs, so you might need to check vendor-specific system apps or resources if the standard locations don’t have the text.

内容的提问来源于stack exchange，提问作者Shruti Mahajan