1 /*
2  * Copyright 2013 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.textlinkify;
18 
19 import android.app.Activity;
20 import android.graphics.Typeface;
21 import android.os.Bundle;
22 import android.text.Html;
23 import android.text.SpannableString;
24 import android.text.Spanned;
25 import android.text.method.LinkMovementMethod;
26 import android.text.style.StyleSpan;
27 import android.text.style.URLSpan;
28 import android.widget.TextView;
29 
30 /**
31  * This sample demonstrates how clickable links can be added to a
32  * {@link android.widget.TextView}.
33  *
34  * <p>This can be done in three ways:
35  * <ul>
36  * <li><b>Automatically:</b> Text added to a TextView can automatically be linkified by enabling
37  * autoLinking. In XML, use the android:autoLink property, programatically call
38  * {@link android.widget.TextView#setAutoLinkMask(int)} using an option from
39  * {@link android.text.util.Linkify}</li>
40  *
41  * <li><b>Parsing a String as HTML:</b> See {@link android.text.Html#fromHtml(String)})</li>
42  *
43  * <li><b>Manually by constructing a {@link android.text.SpannableString}:</b> Consisting of
44  * {@link android.text.style.StyleSpan} and {@link android.text.style.URLSpan} objects that
45  * are contained within a {@link android.text.SpannableString}</li>
46  * </ul></p>
47  *
48  */
49 public class MainActivity extends Activity {
50 
51     @Override
onCreate(Bundle savedInstanceState)52     protected void onCreate(Bundle savedInstanceState) {
53         super.onCreate(savedInstanceState);
54 
55         setContentView(R.layout.sample_main);
56 
57         // BEGIN_INCLUDE(text_auto_linkify)
58         /*
59          *  text_auto_linkify shows the android:autoLink property, which
60          *  automatically linkifies things like URLs and phone numbers
61          *  found in the text. No java code is needed to make this
62          *  work.
63          *  This can also be enabled programmatically by calling
64          *  .setAutoLinkMask(Linkify.ALL) before the text is set on the TextView.
65          *
66          *  See android.text.util.Linkify for other options, for example only
67          *  auto-linking email addresses or phone numbers
68          */
69         // END_INCLUDE(text_auto_linkify)
70 
71         // BEGIN_INCLUDE(text_html_resource)
72         /*
73          * text_html_resource has links specified by putting anchor tags (<a>) in the string
74          * resource. By default these links will appear but not
75          * respond to user input. To make them active, you need to
76          * call setMovementMethod() on the TextView object.
77          */
78         TextView textViewResource = (TextView) findViewById(R.id.text_html_resource);
79         textViewResource.setText(
80                 Html.fromHtml(getResources().getString(R.string.link_text_manual)));
81         textViewResource.setMovementMethod(LinkMovementMethod.getInstance());
82         // END_INCLUDE(text_html_resource)
83 
84         // BEGIN_INCLUDE(text_html_program)
85         /*
86          * text_html_program shows creating text with links from HTML in the Java
87          * code, rather than from a string resource. Note that for a
88          * fixed string, using a (localizable) resource as shown above
89          * is usually a better way to go; this example is intended to
90          * illustrate how you might display text that came from a
91          * dynamic source (eg, the network).
92          */
93         TextView textViewHtml = (TextView) findViewById(R.id.text_html_program);
94         textViewHtml.setText(
95                 Html.fromHtml(
96                         "<b>text_html_program: Constructed from HTML programmatically.</b>"
97                                 + "  Text with a <a href=\"http://www.google.com\">link</a> "
98                                 + "created in the Java source code using HTML."));
99         textViewHtml.setMovementMethod(LinkMovementMethod.getInstance());
100         // END_INCLUDE(text_html_program)
101 
102         // BEGIN_INCLUDE(text_spannable)
103         /*
104          * text_spannable illustrates constructing a styled string containing a
105          * link without using HTML at all. Again, for a fixed string
106          * you should probably be using a string resource, not a
107          * hardcoded value.
108          */
109         SpannableString ss = new SpannableString(
110                 "text_spannable: Manually created spans. Click here to dial the phone.");
111 
112         /*
113          * Make the first 38 characters bold by applying a StyleSpan with bold typeface.
114          *
115          * Characters 45 to 49 (the word "here") is made clickable by applying a URLSpan
116          * pointing to a telephone number. Clicking it opens the "tel:" URL that starts the dialer.
117          *
118          * The SPAN_EXCLUSIVE_EXCLUSIVE flag defines this span as exclusive, which means
119          * that it will not expand to include text inserted on either side of this span.
120          */
121         ss.setSpan(new StyleSpan(Typeface.BOLD), 0, 39,
122                 Spanned.SPAN_INCLUSIVE_INCLUSIVE);
123         ss.setSpan(new URLSpan("tel:4155551212"), 40 + 6, 40 + 10,
124                 Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
125 
126         TextView textViewSpan = (TextView) findViewById(R.id.text_spannable);
127         textViewSpan.setText(ss);
128 
129         /*
130          * Set the movement method to move between links in this TextView.
131          * This means that the user traverses through links in this TextView, automatically
132          * handling appropriate scrolling and key commands.
133          */
134         textViewSpan.setMovementMethod(LinkMovementMethod.getInstance());
135         // END_INCLUDE(text_spannable)
136     }
137 
138 }
139