求通过Intent设置默认设备助手应用的具体Intent参数（Cortana可用）

Hey there, I totally get your frustration—this is one of those under-documented Intent workflows that most forums brush off as impossible, but it is doable, especially if you understand how Android handles default assistant settings. Let me break down what works:

1. Launch the System Assistant Settings Page (No Special Permissions) #

The most reliable, user-facing way is to open the system's built-in settings page where users can select Cortana as their default assistant. This doesn't require any special permissions and works on all Android versions:

For Kotlin:

val intent = Intent(Settings.ACTION_VOICE_INPUT_SETTINGS)
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
context.startActivity(intent)

For Java:

Intent intent = new Intent(Settings.ACTION_VOICE_INPUT_SETTINGS);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);

This will take the user straight to the screen where they can pick Cortana from the list of available assistants.

2. Directly Set Cortana as Default (Requires System Privileges) #

If you're working with a system-level app (like preloaded software), you can skip the user selection and set Cortana directly. This needs the WRITE_SECURE_SETTINGS permission, which is only granted to apps signed with the platform key or system-privileged apps.

First, declare the permission in your manifest:

<uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />

Then use this code to update the default assistant:

val cortanaPackage = "com.microsoft.cortana" // Double-check the package name for your region
Settings.Secure.putString(
    context.contentResolver,
    Settings.Secure.DEFAULT_ASSISTANT,
    cortanaPackage
)

A Quick Note #

If you've seen Cortana do this automatically on some devices, it's almost certainly using the second method—since Microsoft often preloads it as a system app on partner devices, giving it access to those restricted permissions. For regular third-party apps, the first method is your only valid option, as Android blocks direct changes to default assistants for privacy and security.

内容的提问来源于stack exchange，提问作者Praharsh Bhatt