public class MainActivity extends AppCompatActivity {

    PosApi mApi;
    private PrintQueue mPrintQueue = null;
    private Button mBtnPrinter =null;
    private Bitmap mBitmap =null;
    EditText edt_data;
    byte[]textinput = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        edt_data = (EditText)findViewById(R.id.edt_data);
        mBtnPrinter = (Button)this.findViewById(R.id.btn_printer);

        mBtnPrinter.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                PrintBill();
            }
        });

        //1  单片机上电
        try {
            FileWriter localFileWriterOn = new FileWriter(new File("/proc/gpiocontrol/set_sam"));
            localFileWriterOn.write("1");
            localFileWriterOn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        //2 接口初始化
        mApi = App.getInstance().getPosApi();
        //设置初始化回调
        mApi.setOnComEventListener(mCommEventListener); //ERROR
        //使用扩展方式初始化接口
        mApi.initDeviceEx("/dev/ttyMT2");

        mApi =App.getInstance().getPosApi();
        mPrintQueue = new PrintQueue(this,mApi);
        mPrintQueue.init();
        mPrintQueue.setOnPrintListener(new PrintQueue.OnPrintListener() {

            @Override
            public void onGetState(int state) {
                switch(state){
                    case 0:

                        //有纸
                        Toast.makeText(MainActivity.this, "มีกระดาษ", Toast.LENGTH_SHORT).show();

                        break;

                    case 1:

                        //缺纸
                        Toast.makeText(MainActivity.this, "กระดาษหมด", Toast.LENGTH_SHORT).show();

                        break;

                }
            }

            @Override
            public void onPrinterSetting(int state) {
                switch(state){
                    case 0:
                        Toast.makeText(MainActivity.this, "กระดาษต่อเนื่อง", Toast.LENGTH_SHORT).show();
                        break;
                    case 1:
                        Toast.makeText(MainActivity.this, "กระดาษหมด", Toast.LENGTH_SHORT).show();
                        break;
                    case 2:
                        Toast.makeText(MainActivity.this, "ตรวจพบเครื่องหมายสีดำ", Toast.LENGTH_SHORT).show();
                        break;
                }
            }

            @Override
            public void onFinish() {
                // TODO Auto-generated method stub
                //mPosApi.gpioControl((byte)0x23,2,0);
                Toast.makeText(MainActivity.this, "พิมพ์เสร็จแล้ว", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onFailed(int state) {
                // TODO Auto-generated method stub
                //mPosApi.gpioControl((byte)0x23,2,0);
                switch(state){

                    case PosApi.ERR_POS_PRINT_NO_PAPER:
                        //打印缺纸
                        showTip(getString(R.string.print_no_paper));
                        break;
                    case PosApi.ERR_POS_PRINT_FAILED:
                        //打印失败
                        showTip(getString(R.string.print_failed));
                        break;
                    case PosApi.ERR_POS_PRINT_VOLTAGE_LOW:
                        //电压过低
                        showTip(getString(R.string.print_voltate_low));
                        break;
                    case PosApi.ERR_POS_PRINT_VOLTAGE_HIGH:
                        //电压过高
                        showTip(getString(R.string.print_voltate_high));
                        break;
                }
                //Toast.makeText(PrintBarcodeActivity.this, "打印失败  错误码:"+state, Toast.LENGTH_SHORT).show();
            }
        });
    }//oncreate

    OnCommEventListener mCommEventListener = new OnCommEventListener() {

        @Override
        public void onCommState(int cmdFlag, int state, byte[] resp, int respLen) {
            // TODO Auto-generated method stub
            switch(cmdFlag){
                case PosApi.POS_INIT:
                    if(state==PosApi.COMM_STATUS_SUCCESS){
                        Toast.makeText(getApplicationContext(), "success", Toast.LENGTH_SHORT).show();
                    }else {
                        Toast.makeText(getApplicationContext(), "fail", Toast.LENGTH_SHORT).show();
                    }
                    break;
            }
        }


    };