Trying To Ignore All Nfc Intents While In Foreground With Enableforegrounddispatch

I'm trying to get my app to ignore nfc commands while running - its launched by an NFC tag with an Android Application Record (AAR), and I dont want it to be able to be launched by

Solution 1:

You can achieve this by setting launchmode:

<application><activityandroid:launchmode="singleTask">
    ...

singleTask: The system creates the activity at the root of a new task and routes the intent to it. However, if an instance of the activity already exists, the system routes the intent to existing instance through a call to its onNewIntent() method, rather than creating a new one.

Solution 2:

When you use foregroundDispatch a new intent will be given to your activity when you scan a tag. You should overwrite the onNewIntent method. Add something like this:

MainActivity.java

package com.example.nfctest;

import android.app.PendingIntent;
import android.content.Intent;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

publicclassMainActivityextendsActionBarActivity {

privateNfcAdapter mAdapter;
privatePendingIntent mPendingIntent;

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mAdapter = NfcAdapter.getDefaultAdapter(this);
    mPendingIntent = PendingIntent.getActivity(this, 0, newIntent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

    doSomethingWithIntent(this.getIntent());        
}   

@OverridepublicvoidonResume() {
    super.onResume();
    //Enable forground dispatching to get the tags
    mAdapter.enableForegroundDispatch(this, mPendingIntent, null, null); //ended up setting mFilters and mTechLists to null
}   

@OverridepublicvoidonPause() {
    super.onPause();
    //You need to disable forgroundDispatching here
    mAdapter.disableForegroundDispatch(this);
}   

@OverridepublicvoidonNewIntent(Intent data) {
    //Catch the intent your foreground dispatch has launcheddoSomethingWithIntent(data);    
}

privatevoiddoSomethingWithIntent(Intent data) 
{ 
    //Get the tag from the given intentTag tag = data.getParcelableExtra(NfcAdapter.EXTRA_TAG);
    if(tag != null)
    {
        //Tag is foundToast.makeText(this, "Enjoy your tag.", 3).show();      
    }
    else
    {
        //This was an intent without a tagToast.makeText(this, "This was an intent without a tag.", 3).show();    
    }
}

@OverridepublicbooleanonCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);
    returntrue;
}

@OverridepublicbooleanonOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        returntrue;
    }
    returnsuper.onOptionsItemSelected(item);
}
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"package="com.example.nfctest"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="21" /><uses-permissionandroid:name="android.permission.NFC" /><applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid:name=".MainActivity"android:label="@string/app_name" ><intent-filter><actionandroid:name="android.intent.action.MAIN" /><categoryandroid:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

You don't need to define the SINGLE_TOP mode in your manifest because you already did this in your mPendingIntent. And i beleave, even when you leave the flagg here to, it still will call the onNewIntent instead of the onCreate.