我正在使用 Zebra TC26 扫描仪,并希望创建一个可以触发扫描和读取条形码的后台 java 服务。
我有一个没有活动且只有一个服务的应用程序(该服务是我的应用程序和斑马扫描仪 api 之间的中间人)。我实现了一个似乎适用于操作结果的 BroadcastReceiver,例如软扫描触发结果和配置结果。发送 SOFT_SCAN_TRIGGER 操作将开始扫描,但我从未收到带有条形码的结果。只有命令结果。
当我在具有活动的单独应用程序中运行相同的代码时,它可以工作,并且我会收到扫描的代码。我需要做什么才能通过没有活动的服务接收扫描的代码?
public class MyService extends Service {
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String decodedSource = intent.getStringExtra(SOURCE);
String decodedData = intent.getStringExtra(DATA_STRING);
// ...
}
};
// ...
private void startListening() {
IntentFilter filter = new IntentFilter();
filter.addCategory(Intent.CATEGORY_DEFAULT);
filter.addAction(MY_ACTION);
registerReceiver(broadcastReceiver, filter);
}
public void triggerScan() {
Intent i = new Intent();
i.setAction(ACTION);
i.putExtra(SWITCH_PROFILE, MY_PROFILE);
i.putExtra("SEND_RESULT","true");
i.putExtra(SOFT_SCAN_TRIGGER, "START_SCANNING");
this.sendBroadcast(i);
}
// ...
private void initConfiguration(){
Bundle bundleMain = new Bundle();
// profile name and state
bundleMain.putString("PROFILE_NAME", MY_PROFILE);
bundleMain.putString("PROFILE_ENABLED","true");
bundleMain.putString("CONFIG_MODE", "UPDATE");
// Associate profile with this app
Bundle appConfig = new Bundle();
appConfig.putString("PACKAGE_NAME", getPackageName());
appConfig.putStringArray("ACTIVITY_LIST", new String[]{"*"});
bundleMain.putParcelableArray("APP_LIST", new Bundle[]{appConfig});
// Configure intent output for captured data to be sent to this app
Bundle bundleIntentOutConfig = new Bundle();
bundleIntentOutConfig.putString("PLUGIN_NAME", "INTENT");
bundleIntentOutConfig.putString("RESET_CONFIG", "false");
// Param list properties
Bundle bundleIntentParams = new Bundle();
bundleIntentParams.putString("intent_output_enabled", "true");
bundleIntentParams.putString("intent_action", MY_ACTION);
bundleIntentParams.putString("intent_category", Intent.CATEGORY_DEFAULT);
bundleIntentParams.putString("intent_delivery", "2"); //0 - activity, 1 - service, 2 - Broadcast
bundleIntentOutConfig.putBundle("PARAM_LIST", bundleIntentParams);
ArrayList<Bundle> bundlePluginConfig = new ArrayList<>();
bundlePluginConfig.add(bundleIntentOutConfig);
bundleMain.putParcelableArrayList("PLUGIN_CONFIG", bundlePluginConfig);
Intent bundleSetConfig = new Intent();
bundleSetConfig.setAction(ACTION);
bundleSetConfig.putExtra(SET_CONFIG, bundleMain);
bundleSetConfig.putExtra("SEND_RESULT", "COMPLETE_RESULT"); //Supported values: NONE, LAST_RESULT, COMPLETE_RESULT
bundleSetConfig.putExtra("COMMAND_IDENTIFIER", "INTENT_API");
}
}
和
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<service
android:name=".MyService"
android:enabled="true"
android:exported="true">
</service>
</application>