求助：Android中PackageInstaller.uninstall程序化卸载应用的实现示例

No worries—let's break down a clean, working implementation of the recommended PackageInstaller.uninstall() method to replace the deprecated ACTION_UNINSTALL_PACKAGE API. This example covers everything you need, from permissions to handling uninstall results.

Step 1: Add Required Permission #

First, declare the REQUEST_DELETE_PACKAGES permission in your AndroidManifest.xml—this is mandatory for uninstalling apps on Android 8.0 (API 26) and above:

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

This is a normal permission, so you don't need to request it dynamically; the system grants it automatically when your app is installed.

Step 2: Implement the Uninstall Logic #

Here's a complete method you can add to your Activity/Fragment to trigger an uninstall:

private void uninstallApp(String packageName) {
    PackageInstaller packageInstaller = getPackageManager().getPackageInstaller();
    
    // Create a broadcast receiver to handle the uninstall result
    Intent resultIntent = new Intent(this, UninstallResultReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            this,
            0,
            resultIntent,
            // Use FLAG_IMMUTABLE for API 30+ (safer, since we don't need to modify the intent)
            PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE
    );
    
    // Trigger the uninstall
    packageInstaller.uninstall(
            packageName,
            pendingIntent.getIntentSender()
    );
}

Step 3: Create a Broadcast Receiver for Results #

You need a BroadcastReceiver to listen for whether the uninstall succeeded or failed. Create a new class like this:

public class UninstallResultReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        int resultCode = getResultCode();
        if (resultCode == RESULT_OK) {
            Toast.makeText(context, "App uninstalled successfully!", Toast.LENGTH_SHORT).show();
            // You can add logic here to update your app list, etc.
        } else {
            // Get error details if available
            String errorMessage = intent.getStringExtra(PackageInstaller.EXTRA_ERROR_MESSAGE);
            String failMsg = errorMessage != null ? "Uninstall failed: " + errorMessage : "Uninstall failed";
            Toast.makeText(context, failMsg, Toast.LENGTH_LONG).show();
        }
    }
}

Don't forget to register this receiver in your AndroidManifest.xml:

<receiver android:name=".UninstallResultReceiver" />

Key Notes #

• PendingIntent Flags: For API 30+, use FLAG_IMMUTABLE (as shown) unless you specifically need to modify the intent later. This aligns with Android's security best practices.
• Result Handling: Unlike the old startActivityForResult approach, the broadcast receiver lets you capture results even if your app is in the background.
• Compatibility: This works on API 21+ (since PackageInstaller was introduced in API 21), but the REQUEST_DELETE_PACKAGES permission is required starting from API 26.

Now you can call uninstallApp(app.getPackageName()) instead of your old code, and it'll work seamlessly on modern Android versions.

内容的提问来源于stack exchange，提问作者Toni Joe