1/*
2 * Copyright (C) 2010 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
17package com.android.apps.tag;
18
19import com.android.apps.tag.message.NdefMessageParser;
20import com.android.apps.tag.message.ParsedNdefMessage;
21import com.android.apps.tag.record.ParsedNdefRecord;
22
23import android.app.Activity;
24import android.content.Intent;
25import android.nfc.NdefMessage;
26import android.nfc.NfcAdapter;
27import android.os.Bundle;
28import android.os.Parcelable;
29import android.util.Log;
30import android.view.LayoutInflater;
31import android.view.View;
32import android.view.View.OnClickListener;
33import android.widget.LinearLayout;
34import android.widget.TextView;
35
36import java.util.List;
37
38/**
39 * An {@link Activity} which handles a broadcast of a new tag that the device just discovered.
40 */
41public class TagViewer extends Activity implements OnClickListener {
42    static final String TAG = "TagViewer";
43
44    LinearLayout mTagContent;
45
46    @Override
47    protected void onCreate(Bundle savedInstanceState) {
48        super.onCreate(savedInstanceState);
49
50        setContentView(R.layout.tag_viewer);
51
52        mTagContent = (LinearLayout) findViewById(R.id.list);
53
54        resolveIntent(getIntent());
55    }
56
57    void resolveIntent(Intent intent) {
58        // Parse the intent
59        String action = intent.getAction();
60        if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)
61                || NfcAdapter.ACTION_TECH_DISCOVERED.equals(action)) {
62            Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
63            NdefMessage msg = null;
64            if (rawMsgs != null && rawMsgs.length > 0) {
65                msg = (NdefMessage) rawMsgs[0];
66            }
67
68            buildTagViews(msg);
69        } else {
70            Log.e(TAG, "Unknown intent " + intent);
71            finish();
72            return;
73        }
74    }
75
76    void buildTagViews(NdefMessage msg) {
77        LayoutInflater inflater = LayoutInflater.from(this);
78        LinearLayout content = mTagContent;
79
80        // Clear out any old views in the content area, for example if you scan two tags in a row.
81        content.removeAllViews();
82
83        // Build views for all of the sub records
84        if (msg == null) {
85            TextView empty = (TextView) inflater.inflate(R.layout.tag_text, content, false);
86            empty.setText(R.string.tag_empty);
87            content.addView(empty);
88        } else {
89            // Parse the first message in the list
90            //TODO figure out what to do when/if we support multiple messages per tag
91            ParsedNdefMessage parsedMsg = NdefMessageParser.parse(msg);
92
93            List<ParsedNdefRecord> records = parsedMsg.getRecords();
94            final int size = records.size();
95            if (size == 0) {
96                TextView empty = (TextView) inflater.inflate(R.layout.tag_text, content, false);
97                empty.setText(R.string.tag_empty);
98                content.addView(empty);
99            } else {
100                for (int i = 0; i < size; i++) {
101                    ParsedNdefRecord record = records.get(i);
102                    content.addView(record.getView(this, inflater, content, i));
103                    inflater.inflate(R.layout.tag_divider, content, true);
104                }
105            }
106        }
107    }
108
109    @Override
110    public void onNewIntent(Intent intent) {
111        setIntent(intent);
112        resolveIntent(intent);
113    }
114
115    @Override
116    public void onClick(View view) {
117        finish();
118    }
119}
120