ZEBRA(斑马 T26)PDA 程序内按钮开启红外扫描

    main = plus.android.runtimeMainActivity(); //获取activity  
    var Intent = plus.android.importClass('android.content.Intent');  
    var intent = new Intent();  
    if (plus.device.model === 'TC26'){  
        var softScanTrigger = "com.symbol.datawedge.api.ACTION";  
        var extraData = "com.symbol.datawedge.api.SOFT_SCAN_TRIGGER";  
        intent.setAction(softScanTrigger);  
        intent.putExtra(extraData, "START_SCANNING");  
        main.sendBroadcast(intent, null);  
        var receiver;  
        try {  
            receiver = plus.android.implements('io.dcloud.android.content.BroadcastReceiver', {  
                onReceive: function(context, intent) { //实现onReceiver回调函数  
                    plus.android.importClass(intent); //通过intent实例引入intent类，方便以后的‘.’操作  
                    var data = intent.getStringExtra('com.symbol.datawedge.data_string');  
                }  
            });  
        }catch(e){  
            alert("扫码异常,请退出重试");  
        }  
        var IntentFilter = plus.android.importClass('android.content.IntentFilter');  
        var filter = new IntentFilter();  
       // com.symbol.datawedge.scan 为DataWedge文件设置内容  
        filter.addAction("com.symbol.datawedge.scan"); //监听扫码广播  
        main.registerReceiver(receiver, filter); //注册监听  
     }