我在V7 POS终端(打印模块)android机器(V5.1.1)工作。我在我的应用程序中配置了SDK(Jar文件)。服务器应用程序安装在POS机上。打印过程中出现问题。在这里,我包括了我的步骤。我被困在问题超过一天。帮我解决一下
服务开始。
public void startService(){
Intent intent = new Intent();
intent.setAction("com.justtide.service.dev.AIDL_SERVICE");
intent.setPackage("com.justtide.service.dev");
bindService(intent, mConnection, Service.BIND_AUTO_CREATE);
}
设备提供商
private ServiceConnection mConnection = new ServiceConnection() {
@Override
public void onServiceDisconnected(ComponentName name) {
}
@Override
public synchronized void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub
mDeviceProvider = DeviceProvider.Stub.asInterface(service);
}
};
打印机供应商
printerProvider =mDeviceProvider.getPrinterProvider();
printerProvider.fillStringFormat("TEST",PRINTER_FONT_SIZE_SMALL,PRINTER_FONT_TYPE_BOLD,PRINTER_ALIGNMENT_CENTER);
printerProvider.fillString("001420183990573");
int ret=-1;
try{
ret = printerProvider.print(); // The Problem is occurred here.
} catch (RemoteException e) {
e.printStackTrace();
}
在这里,我将错误日志包含在POS机中。
错误选择应用程序
com.example.justtidev7_demo I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@3e9ea6fc time:3027349
com.example.justtidev7_demo W/System.err: android.os.DeadObjectException
com.example.justtidev7_demo W/System.err: at android.os.BinderProxy.transactNative(Native Method)
com.example.justtidev7_demo W/System.err: at android.os.BinderProxy.transact(Binder.java:496)
com.example.justtidev7_demo W/System.err: at com.justtide.service.dev.aidl.printer.PrinterProvider$Stub$Proxy.print(PrinterProvider.java:274)
com.example.justtidev7_demo W/System.err: at
com.justtide.dao.Printer.print(Printer.java:34)
com.example.justtidev7_demo W/System.err: at
com.justtide.activity.PrintActivity$3.run(PrintActivity.java:111)
com.example.justtidev7_demo W/System.err: at java.lang.Thread.run(Thread.java:818)
错误没有过滤器
JustD: jdc_connect ...
02-08 15:36:51.577 15261-15276/? E/JavaBinder: *** Uncaught remote
exception! (Exceptions are not yet supported across processes.)
java.lang.NoSuchMethodError: No virtual method printerOpen()I in class
Lcom/just/api/PosDevice; or its super classes (declaration of
'com.just.api.PosDevice' appears in
/system/framework/framework.jar:classes2.dex) at
com.justtide.justtide.aq.d(Unknown Source) at justtide.PrintPicture.startPrint(Unknown Source) at com.justtide.service.dev.i.print(Unknown Source) at com.justtide.service.dev.aidl.printer.PrinterProvider$Stub.onTransact(Unknown Source) at android.os.Binder.execTransact(Binder.java:446)
02-08 15:36:51.577 15261-15276/? E/AndroidRuntime: FATAL EXCEPTION: Binder_1
Process: com.justtide.service.dev, PID: 15261
java.lang.NoSuchMethodError: No virtual method printerOpen()I in class Lcom/just/api/PosDevice; or its super classes (declaration of 'com.just.api.PosDevice' appears in /system/framework/framework.jar:classes2.dex)
at com.justtide.justtide.aq.d(Unknown Source)
at justtide.PrintPicture.startPrint(Unknown Source)
at com.justtide.service.dev.i.print(Unknown Source)
at com.justtide.service.dev.aidl.printer.PrinterProvider$Stub.onTransact(Unknown Source)
at android.os.Binder.execTransact(Binder.java:446)
已经有一年多了,但是嘿......让我试着为未来的读者回答这个问题
好吧,对于初学者来说,例外DeadObjectException
只是意味着你正在调用的对象已经死亡,因为它的托管过程不再存在。
我可以看到你没有取消绑定你的连接,你可能正在使用已经死亡的连接,但你正在调用它上面的打印功能。 (你正在泄漏它,检查你的日志)
我建议您尝试捕获来自PrinterProvider
的所有语句并在Application类文件(即class App extends Application
)上启动打印机连接,公开该对象并建立静态连接,然后在您的活动中使用它,这样您就可以绑定和取消绑定一旦需要或退出活动时。
public class App extends Application {
protected App app;
public static DeviceProvider deviceProvider;
public static PrinterProvider printerProvider;
public static UtilsProvider utils;
private static ServiceConnection conn;
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
this.app = (App) getApplicationContext();
}
/* do your thing i.e connection,
* static methods for printing e.t.c expose them ,
* use them in your activities
*/
}
或者,如果其中任何一个没有任何意义,您可以随时向制造商索取一份记录良好的SDK。
希望这有助于某人。谢谢