我是第一次使用这个指纹扫描仪/zk9500/。 我编译 jar 文件。
implementation files('libs/zkandroidcore.jar')
implementation files('libs/zkandroidfpreader.jar')
所以我写了这段代码。
private BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION_USB_PERMISSION.equals(action)) {
synchronized (this) {
if (intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
LogHelper.i("have permission!");
} else {
LogHelper.e("not permission!");
}
}
}
}
};
private void InitDevice() {
UsbManager musbManager = (UsbManager) this.getSystemService(Context.USB_SERVICE);
IntentFilter filter = new IntentFilter();
filter.addAction(ACTION_USB_PERMISSION);
filter.addAction(UsbManager.ACTION_USB_ACCESSORY_ATTACHED);
Context context = this.getApplicationContext();
context.registerReceiver(mUsbReceiver, filter);
for (UsbDevice device : musbManager.getDeviceList().values()) {
if (device.getVendorId() == VID && device.getProductId() == PID) {
if (!musbManager.hasPermission(device)) {
Intent intent = new Intent(ACTION_USB_PERMISSION);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
musbManager.requestPermission(device, pendingIntent);
}
}
}
}
但不征求许可。我不知道如何征求许可。
只有"危险"权限需要运行时确认。 ACTION_USB_PERMISSION
不是危险的许可。
危险权限列表 : https://developer.android.com/guide/topics/permissions/overview.html#permission-groups