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 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
