Open Mobile Api 接口使用流程

工作中需要用到 openmobileapi接口，由于遇到不少问题，所以记录一下

1、OpenMobileApi 在Android P以后，谷歌将此API的实现纳入官方API中。但是在Android P之前需要外部引入org.simalliance.openmobileapi.jar包才能使用相关功能。jar包可以自己网上去下载，注意由于android5.0后不支持隐士启动service，所以需要下载支持android5.0以上的jar包，可以通过如下链接下载jar和测试demo

https://download.youkuaiyun.com/download/x995630736/86937805?spm=1001.2014.3001.5503

2、集成好jar后需要验证接口功能是否正常

   首先 创建app工程，在AndroidManifest.xml 中加权限 

<uses-permission android:name="org.simalliance.openmobileapi.SMARTCARD"></uses-permission>

   然后编写测试代码，链接demo中有提供

SEServiceCallback callback = new SEServiceCallback();
new SEService(this, callback);

public class SEServiceCallback implements SEService.CallBack {

    @Override
    public void serviceConnected(SEService service) {
        _service = service;
        performTest();
    }
}

private void performTest() {
    Reader[] readers = _service.getReaders();
    logd("Available readers:  \n");
    for (Reader reader : readers)
        logd(" " + reader.getName() + "   - " + ((reader.isSecureElementPresent()) ? "present" : "absent") + "\n");

    if (readers.length == 0) {
        logd("No reader available \n");
        return;
    }

    for (Reader reader : readers) {
        if (!reader.isSecureElementPresent())
            continue;

        logd("\n--------------------------------\nSelected reader: \"" + reader.getName() + "\"\n");

        try {
            _session = reader.openSession();
        } catch (Exception e) {
            logd(e.getMessage());
        }
        if (_session == null)
            continue;

        try {
            byte[] atr = _session.getATR();
            logd("ATR: " + ((atr == null) ? "unavailable" : bytesToString(atr)) + "\n\n");
        } catch (Exception e) {
            logd("Exception on getATR(): " + e.getMessage() + "\n\n");
        }

        testBasicChannel(null);
        testBasicChannel(ISD_AID);

        testLogicalChannel(null);
        testLogicalChannel(ISD_AID);

        _session.close();
    }
}

void testBasicChannel(byte[] aid) {
    try {
        logd("BasicChannel test: " + ((aid == null) ? "default applet" : bytesToString(aid)) + "\n");
        Channel channel = _session.openBasicChannel(aid);

        byte[] cmd = new byte[] { (byte) 0x80, (byte) 0xCA, (byte) 0x9F, 0x7F, 0x00 };
        logd(" -> " + bytesToString(cmd) + "\n");
        byte[] rsp = channel.transmit(cmd);
        logd(" <- " + bytesToString(rsp) + "\n\n");

        channel.close();
    } catch (Exception e) {
        logd("Exception on BasicChannel: " + e.getMessage() + "\n\n");
    }
}

void testLogicalChannel(byte[] aid) {
    try {
        logd("LogicalChannel test: " + ((aid == null) ? "default applet" : bytesToString(aid)) + "\n");
        Channel channel = _session.openLogicalChannel(aid);

        byte[] cmd = new byte[] { (byte) 0x80, (byte) 0xCA, (byte) 0x9F, 0x7F, 0x00 };
        logd(" -> " + bytesToString(cmd) + "\n");
        byte[] rsp = channel.transmit(cmd);
        logd(" <- " + bytesToString(rsp) + "\n\n");

        channel.close();
    } catch (Exception e) {
        logd("Exception on LogicalChannel: " + e.getMessage() + "\n\n");
    }
}
private static String bytesToString(byte[] bytes) {
    StringBuffer sb = new StringBuffer();
    for (byte b : bytes)
        sb.append(String.format("%02x ", b & 0xFF));

    return sb.toString();
}

     最后运行测试代码，发现一直打印绑定失败 SEService: bindingSuccessful: false，从jar包源码中可以看到是由于绑定smartcardService失败了，所以需要检查固件编译时是否有把smartcardService源码编译进去。我这边是由于没有编译进去导致

 

  在system/app目录下可以查看是否存在相关APP，存在表示源码已经成功合入

  

 

 重新编译固件源码后测试 ，打印绑定成功 SEService: bindingSuccessful: true

  绑定成功后说明OMA通道是正常的，就可以对SE模块进项相关操作了