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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.example.android.apis.nfc;
     18 
     19 import com.example.android.apis.R;
     20 
     21 import android.app.Activity;
     22 import android.app.PendingIntent;
     23 import android.content.Intent;
     24 import android.content.IntentFilter;
     25 import android.content.IntentFilter.MalformedMimeTypeException;
     26 import android.nfc.NfcAdapter;
     27 import android.nfc.tech.NfcF;
     28 import android.os.Bundle;
     29 import android.util.Log;
     30 import android.widget.TextView;
     31 
     32 /**
     33  * An example of how to use the NFC foreground dispatch APIs. This will intercept any MIME data
     34  * based NDEF dispatch as well as all dispatched for NfcF tags.
     35  */
     36 public class ForegroundDispatch extends Activity {
     37     private NfcAdapter mAdapter;
     38     private PendingIntent mPendingIntent;
     39     private IntentFilter[] mFilters;
     40     private String[][] mTechLists;
     41     private TextView mText;
     42     private int mCount = 0;
     43 
     44     @Override
     45     public void onCreate(Bundle savedState) {
     46         super.onCreate(savedState);
     47 
     48         setContentView(R.layout.foreground_dispatch);
     49         mText = (TextView) findViewById(R.id.text);
     50         mText.setText("Scan a tag");
     51 
     52         mAdapter = NfcAdapter.getDefaultAdapter(this);
     53 
     54         // Create a generic PendingIntent that will be deliver to this activity. The NFC stack
     55         // will fill in the intent with the details of the discovered tag before delivering to
     56         // this activity.
     57         mPendingIntent = PendingIntent.getActivity(this, 0,
     58                 new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
     59 
     60         // Setup an intent filter for all MIME based dispatches
     61         IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
     62         try {
     63             ndef.addDataType("*/*");
     64         } catch (MalformedMimeTypeException e) {
     65             throw new RuntimeException("fail", e);
     66         }
     67         mFilters = new IntentFilter[] {
     68                 ndef,
     69         };
     70 
     71         // Setup a tech list for all NfcF tags
     72         mTechLists = new String[][] { new String[] { NfcF.class.getName() } };
     73     }
     74 
     75     @Override
     76     public void onResume() {
     77         super.onResume();
     78         if (mAdapter != null) mAdapter.enableForegroundDispatch(this, mPendingIntent, mFilters,
     79                 mTechLists);
     80     }
     81 
     82     @Override
     83     public void onNewIntent(Intent intent) {
     84         Log.i("Foreground dispatch", "Discovered tag with intent: " + intent);
     85         mText.setText("Discovered tag " + ++mCount + " with intent: " + intent);
     86     }
     87 
     88     @Override
     89     public void onPause() {
     90         super.onPause();
     91         if (mAdapter != null) mAdapter.disableForegroundDispatch(this);
     92     }
     93 }
     94