小编ssg*_*ssg的帖子

这是我的HelloPlugin.js文件.

var HelloPlugin = { 
  callNativeFunction: function(success,fail,resultType) { 
    return cordova.exec(success, fail, "HelloPlugin", "nativeAction", [resultType]); 
  } 
};

我收到以下异常:

: Uncaught ReferenceError: cordova is not defined at file:///android_asset/www/HelloPlugin.js:3

先感谢您.

嗨,我正在开发一个用于读取和写入NFC标签数据的应用程序.我在从NFC标签读取数据时遇到问题.当我尝试读取数据时,我的应用程序第一次崩溃,当我第二次扫描标签时应用程序读取数据.请帮我解决这个问题.这是我的代码.提前致谢.

public class Read extends Activity {

    Tag detectedTag;
    TextView txtType,txtSize,txtWrite,txtRead;
    NfcAdapter nfcAdapter;
    IntentFilter[] readTagFilters;
    PendingIntent pendingIntent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.read);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);

         nfcAdapter = NfcAdapter.getDefaultAdapter();
         detectedTag =getIntent().getParcelableExtra(NfcAdapter.EXTRA_TAG);
        txtType  = (TextView) findViewById(R.id.txtType);
        txtSize  = (TextView) findViewById(R.id.txtsize);
        txtWrite = (TextView) findViewById(R.id.txtwrite);
        txtRead  = (TextView) findViewById(R.id.txt_read);

        pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, 
                new Intent(this,getClass()).
                addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

        IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
        IntentFilter filter2     = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
        readTagFilters = new IntentFilter[]{tagDetected,filter2};

    }

    protected void onNewIntent(Intent intent) {

        if(getIntent().getAction().equals(NfcAdapter.ACTION_TAG_DISCOVERED)){
            detectedTag = …