Android example source code file (UriRecord.java)

This example Android source code file (UriRecord.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, app, bimap, illegalargumentexception, layoutinflater, net, network, parsedndefrecord, string, tag, textview, tnf, ui, unknown, uri, uri_prefix_map, urirecord, utf-8, view, viewgroup

The UriRecord.java Android example source code

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.example.android.nfc.record;

import android.app.Activity;
import android.net.Uri;
import android.nfc.NdefRecord;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.google.common.base.Preconditions;
import com.google.common.collect.BiMap;
import com.google.common.collect.ImmutableBiMap;
import com.google.common.primitives.Bytes;

import com.example.android.nfc.R;

import java.nio.charset.Charset;
import java.util.Arrays;

/**
 * A parsed record containing a Uri.
 */
public class UriRecord implements ParsedNdefRecord {

    private static final String TAG = "UriRecord";

    public static final String RECORD_TYPE = "UriRecord";

    /**
     * NFC Forum "URI Record Type Definition"
     *
     * This is a mapping of "URI Identifier Codes" to URI string prefixes,
     * per section 3.2.2 of the NFC Forum URI Record Type Definition document.
     */
    private static final BiMap<Byte, String> URI_PREFIX_MAP = ImmutableBiMap.builder()
            .put((byte) 0x00, "")
            .put((byte) 0x01, "http://www.")
            .put((byte) 0x02, "https://www.")
            .put((byte) 0x03, "http://")
            .put((byte) 0x04, "https://")
            .put((byte) 0x05, "tel:")
            .put((byte) 0x06, "mailto:")
            .put((byte) 0x07, "ftp://anonymous:anonymous@")
            .put((byte) 0x08, "ftp://ftp.")
            .put((byte) 0x09, "ftps://")
            .put((byte) 0x0A, "sftp://")
            .put((byte) 0x0B, "smb://")
            .put((byte) 0x0C, "nfs://")
            .put((byte) 0x0D, "ftp://")
            .put((byte) 0x0E, "dav://")
            .put((byte) 0x0F, "news:")
            .put((byte) 0x10, "telnet://")
            .put((byte) 0x11, "imap:")
            .put((byte) 0x12, "rtsp://")
            .put((byte) 0x13, "urn:")
            .put((byte) 0x14, "pop:")
            .put((byte) 0x15, "sip:")
            .put((byte) 0x16, "sips:")
            .put((byte) 0x17, "tftp:")
            .put((byte) 0x18, "btspp://")
            .put((byte) 0x19, "btl2cap://")
            .put((byte) 0x1A, "btgoep://")
            .put((byte) 0x1B, "tcpobex://")
            .put((byte) 0x1C, "irdaobex://")
            .put((byte) 0x1D, "file://")
            .put((byte) 0x1E, "urn:epc:id:")
            .put((byte) 0x1F, "urn:epc:tag:")
            .put((byte) 0x20, "urn:epc:pat:")
            .put((byte) 0x21, "urn:epc:raw:")
            .put((byte) 0x22, "urn:epc:")
            .put((byte) 0x23, "urn:nfc:")
            .build();

    private final Uri mUri;

    private UriRecord(Uri uri) {
        this.mUri = Preconditions.checkNotNull(uri);
    }

    public View getView(Activity activity, LayoutInflater inflater, ViewGroup parent, int offset) {
        TextView text = (TextView) inflater.inflate(R.layout.tag_text, parent, false);
        text.setText(mUri.toString());
        return text;
    }

    public Uri getUri() {
        return mUri;
    }

    /**
     * Convert {@link android.nfc.NdefRecord} into a {@link android.net.Uri}.
     * This will handle both TNF_WELL_KNOWN / RTD_URI and TNF_ABSOLUTE_URI.
     *
     * @throws IllegalArgumentException if the NdefRecord is not a record
     *         containing a URI.
     */
    public static UriRecord parse(NdefRecord record) {
        short tnf = record.getTnf();
        if (tnf == NdefRecord.TNF_WELL_KNOWN) {
            return parseWellKnown(record);
        } else if (tnf == NdefRecord.TNF_ABSOLUTE_URI) {
            return parseAbsolute(record);
        }
        throw new IllegalArgumentException("Unknown TNF " + tnf);
    }

    /** Parse and absolute URI record */
    private static UriRecord parseAbsolute(NdefRecord record) {
        byte[] payload = record.getPayload();
        Uri uri = Uri.parse(new String(payload, Charset.forName("UTF-8")));
        return new UriRecord(uri);
    }

    /** Parse an well known URI record */
    private static UriRecord parseWellKnown(NdefRecord record) {
        Preconditions.checkArgument(Arrays.equals(record.getType(), NdefRecord.RTD_URI));
        byte[] payload = record.getPayload();
        /*
         * payload[0] contains the URI Identifier Code, per the
         * NFC Forum "URI Record Type Definition" section 3.2.2.
         *
         * payload[1]...payload[payload.length - 1] contains the rest of
         * the URI.
         */
        String prefix = URI_PREFIX_MAP.get(payload[0]);
        byte[] fullUri =
            Bytes.concat(prefix.getBytes(Charset.forName("UTF-8")), Arrays.copyOfRange(payload, 1,
                payload.length));
        Uri uri = Uri.parse(new String(fullUri, Charset.forName("UTF-8")));
        return new UriRecord(uri);
    }

    public static boolean isUri(NdefRecord record) {
        try {
            parse(record);
            return true;
        } catch (IllegalArgumentException e) {
            return false;
        }
    }

    private static final byte[] EMPTY = new byte[0];
}