我正在Android项目中实现NFC功能。我已经在AndroidManifest.xml文件和Java代码中编写了所需的条目。
当任何标签靠近设备时,我的应用程序会检测到该标签,然后打开活动。但是这里我只能获取到NFC标签信息,却无法执行onNewIntent
方法。
请大家分享你们的看法。
public class NFCActivity extends Activity {
private NfcAdapter mNFCAdapter;
private PendingIntent mNfcPendingIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_nfc);
// Create the OpenSqliteHelper object. It always best to create only
// once instance of this OpenSqliteHelper
DatabaseManager.init(this);
mNFCAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNFCAdapter == null) {
// Device does not support NFC
Toast.makeText(this,
getString(R.string.device_does_not_support_nfc),
Toast.LENGTH_LONG).show();
} else {
if (!mNFCAdapter.isEnabled()) {
// NFC is disabled
Toast.makeText(this, getString(R.string.enable_nfc),
Toast.LENGTH_LONG).show();
} else {
mNfcPendingIntent = PendingIntent.getActivity(NFCActivity.this,
0, new Intent(NFCActivity.this, NFCActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
}
}
finish();
}
@Override
protected void onNewIntent(Intent intent) {
Tag mTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
}
@Override
protected void onPause() {
super.onPause();
mNFCAdapter.disableForegroundDispatch(this);
}
@Override
public void onResume() {
super.onResume();
mNFCAdapter.enableForegroundDispatch(this, mNfcPendingIntent, null,
null);
}
}
AndroidManifest.xml
:Android 应用程序的清单文件。<activity
android:name="net.livepatrols.thepartnerSA.NFCActivity"
android:theme="@android:style/Theme.NoDisplay" >
<intent-filter>
<action android:name="android.nfc.action.TECH_DISCOVERED" />
</intent-filter>
<meta-data
android:name="android.nfc.action.TECH_DISCOVERED"
android:resource="@xml/nfc_tech_filter" />
<intent-filter>
<action android:name="android.nfc.action.TAG_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
- N Sharma