检测android用户何时在Android中缩放应用程序屏幕

DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
float density = displayMetrics.density;

public class DensityChangeReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
            // 屏幕密度发生变化，执行相应操作
        }
    }
}

<receiver android:name=".DensityChangeReceiver">
    <intent-filter>
        <action android:name="android.intent.action.CONFIGURATION_CHANGED" />
    </intent-filter>
</receiver>

View rootView = getWindow().getDecorView().getRootView();
rootView.setScaleX(scaleFactor);
rootView.setScaleY(scaleFactor);