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/*
* Copyright 2013 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.textlinkify;
import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.text.Html;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.StyleSpan;
import android.text.style.URLSpan;
import android.widget.TextView;
/**
* This sample demonstrates how clickable links can be added to a
* {@link android.widget.TextView}.
*
* <p>This can be done in three ways:
* <ul>
* <li><b>Automatically:</b> Text added to a TextView can automatically be linkified by enabling
* autoLinking. In XML, use the android:autoLink property, programatically call
* {@link android.widget.TextView#setAutoLinkMask(int)} using an option from
* {@link android.text.util.Linkify}</li>
*
* <li><b>Parsing a String as HTML:</b> See {@link android.text.Html#fromHtml(String)})</li>
*
* <li><b>Manually by constructing a {@link android.text.SpannableString}:</b> Consisting of
* {@link android.text.style.StyleSpan} and {@link android.text.style.URLSpan} objects that
* are contained within a {@link android.text.SpannableString}</li>
* </ul></p>
*
*/
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sample_main);
// BEGIN_INCLUDE(text_auto_linkify)
/*
* text_auto_linkify shows the android:autoLink property, which
* automatically linkifies things like URLs and phone numbers
* found in the text. No java code is needed to make this
* work.
* This can also be enabled programmatically by calling
* .setAutoLinkMask(Linkify.ALL) before the text is set on the TextView.
*
* See android.text.util.Linkify for other options, for example only
* auto-linking email addresses or phone numbers
*/
// END_INCLUDE(text_auto_linkify)
// BEGIN_INCLUDE(text_html_resource)
/*
* text_html_resource has links specified by putting anchor tags (<a>) in the string
* resource. By default these links will appear but not
* respond to user input. To make them active, you need to
* call setMovementMethod() on the TextView object.
*/
TextView textViewResource = (TextView) findViewById(R.id.text_html_resource);
textViewResource.setText(
Html.fromHtml(getResources().getString(R.string.link_text_manual)));
textViewResource.setMovementMethod(LinkMovementMethod.getInstance());
// END_INCLUDE(text_html_resource)
// BEGIN_INCLUDE(text_html_program)
/*
* text_html_program shows creating text with links from HTML in the Java
* code, rather than from a string resource. Note that for a
* fixed string, using a (localizable) resource as shown above
* is usually a better way to go; this example is intended to
* illustrate how you might display text that came from a
* dynamic source (eg, the network).
*/
TextView textViewHtml = (TextView) findViewById(R.id.text_html_program);
textViewHtml.setText(
Html.fromHtml(
"<b>text_html_program: Constructed from HTML programmatically.</b>"
+ " Text with a <a href=\"http://www.google.com\">link</a> "
+ "created in the Java source code using HTML."));
textViewHtml.setMovementMethod(LinkMovementMethod.getInstance());
// END_INCLUDE(text_html_program)
// BEGIN_INCLUDE(text_spannable)
/*
* text_spannable illustrates constructing a styled string containing a
* link without using HTML at all. Again, for a fixed string
* you should probably be using a string resource, not a
* hardcoded value.
*/
SpannableString ss = new SpannableString(
"text_spannable: Manually created spans. Click here to dial the phone.");
/*
* Make the first 38 characters bold by applying a StyleSpan with bold typeface.
*
* Characters 45 to 49 (the word "here") is made clickable by applying a URLSpan
* pointing to a telephone number. Clicking it opens the "tel:" URL that starts the dialer.
*
* The SPAN_EXCLUSIVE_EXCLUSIVE flag defines this span as exclusive, which means
* that it will not expand to include text inserted on either side of this span.
*/
ss.setSpan(new StyleSpan(Typeface.BOLD), 0, 39,
Spanned.SPAN_INCLUSIVE_INCLUSIVE);
ss.setSpan(new URLSpan("tel:4155551212"), 40 + 6, 40 + 10,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
TextView textViewSpan = (TextView) findViewById(R.id.text_spannable);
textViewSpan.setText(ss);
/*
* Set the movement method to move between links in this TextView.
* This means that the user traverses through links in this TextView, automatically
* handling appropriate scrolling and key commands.
*/
textViewSpan.setMovementMethod(LinkMovementMethod.getInstance());
// END_INCLUDE(text_spannable)
}
}
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