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TextLinkify / src / com.example.android.textlinkify /

MainActivity.java

       
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        /*
       
       
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        * Copyright 2013 The Android Open Source Project
       
       
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        *
       
       
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        * Licensed under the Apache License, Version 2.0 (the "License");
       
       
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        * you may not use this file except in compliance with the License.
       
       
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        * You may obtain a copy of the License at
       
       
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        *
       
       
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        *       http://www.apache.org/licenses/LICENSE-2.0
       
       
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        *
       
       
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        * Unless required by applicable law or agreed to in writing, software
       
       
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        * distributed under the License is distributed on an "AS IS" BASIS,
       
       
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        * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       
       
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        * See the License for the specific language governing permissions and
       
       
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        * limitations under the License.
       
       
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        */
       
       
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        package com.example.android.textlinkify;
       
       
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        import android.app.Activity;
       
       
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        import android.graphics.Typeface;
       
       
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        import android.os.Bundle;
       
       
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        import android.text.Html;
       
       
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        import android.text.SpannableString;
       
       
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        import android.text.Spanned;
       
       
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        import android.text.method.LinkMovementMethod;
       
       
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        import android.text.style.StyleSpan;
       
       
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        import android.text.style.URLSpan;
       
       
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        import android.widget.TextView;
       
       
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        /**
       
       
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        * This sample demonstrates how clickable links can be added to a
       
       
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        * {@link android.widget.TextView}.
       
       
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        *
       
       
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        * <p>This can be done in three ways:
       
       
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        * <ul>
       
       
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        * <li><b>Automatically:</b> Text added to a TextView can automatically be linkified by enabling
       
       
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        * autoLinking. In XML, use the android:autoLink property, programatically call
       
       
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        * {@link android.widget.TextView#setAutoLinkMask(int)} using an option from
       
       
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        * {@link android.text.util.Linkify}</li>
       
       
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        *
       
       
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        * <li><b>Parsing a String as HTML:</b> See {@link android.text.Html#fromHtml(String)})</li>
       
       
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        *
       
       
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        * <li><b>Manually by constructing a {@link android.text.SpannableString}:</b> Consisting of
       
       
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        * {@link android.text.style.StyleSpan} and {@link android.text.style.URLSpan} objects that
       
       
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        * are contained within a {@link android.text.SpannableString}</li>
       
       
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        * </ul></p>
       
       
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        *
       
       
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        */
       
       
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        public class MainActivity extends Activity {
       
       
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        @Override
       
       
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        protected void onCreate(Bundle savedInstanceState) {
       
       
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        super.onCreate(savedInstanceState);
       
       
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        setContentView(R.layout.sample_main);
       
       
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        /*
       
       
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        *  text_auto_linkify shows the android:autoLink property, which
       
       
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        *  automatically linkifies things like URLs and phone numbers
       
       
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        *  found in the text. No java code is needed to make this
       
       
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        *  work.
       
       
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        *  This can also be enabled programmatically by calling
       
       
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        *  .setAutoLinkMask(Linkify.ALL) before the text is set on the TextView.
       
       
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        *
       
       
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        *  See android.text.util.Linkify for other options, for example only
       
       
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        *  auto-linking email addresses or phone numbers
       
       
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        */
       
       
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        /*
       
       
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        * text_html_resource has links specified by putting anchor tags (<a>) in the string
       
       
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        * resource. By default these links will appear but not
       
       
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        * respond to user input. To make them active, you need to
       
       
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        * call setMovementMethod() on the TextView object.
       
       
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        */
       
       
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        TextView textViewResource = (TextView) findViewById(R.id.text_html_resource);
       
       
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        textViewResource.setText(
       
       
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        Html.fromHtml(getResources().getString(R.string.link_text_manual)));
       
       
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        textViewResource.setMovementMethod(LinkMovementMethod.getInstance());
       
       
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        /*
       
       
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        * text_html_program shows creating text with links from HTML in the Java
       
       
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        * code, rather than from a string resource. Note that for a
       
       
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        * fixed string, using a (localizable) resource as shown above
       
       
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        * is usually a better way to go; this example is intended to
       
       
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        * illustrate how you might display text that came from a
       
       
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        * dynamic source (eg, the network).
       
       
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        */
       
       
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        TextView textViewHtml = (TextView) findViewById(R.id.text_html_program);
       
       
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        textViewHtml.setText(
       
       
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        Html.fromHtml(
       
       
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        "<b>text_html_program: Constructed from HTML programmatically.</b>"
       
       
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        + "  Text with a <a href=\"http://www.google.com\">link</a> "
       
       
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        + "created in the Java source code using HTML."));
       
       
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        textViewHtml.setMovementMethod(LinkMovementMethod.getInstance());
       
       
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        /*
       
       
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        * text_spannable illustrates constructing a styled string containing a
       
       
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        * link without using HTML at all. Again, for a fixed string
       
       
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        * you should probably be using a string resource, not a
       
       
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        * hardcoded value.
       
       
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        */
       
       
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        SpannableString ss = new SpannableString(
       
       
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        "text_spannable: Manually created spans. Click here to dial the phone.");
       
       
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        /*
       
       
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        * Make the first 38 characters bold by applying a StyleSpan with bold typeface.
       
       
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        *
       
       
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        * Characters 45 to 49 (the word "here") is made clickable by applying a URLSpan
       
       
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        * pointing to a telephone number. Clicking it opens the "tel:" URL that starts the dialer.
       
       
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        *
       
       
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        * The SPAN_EXCLUSIVE_EXCLUSIVE flag defines this span as exclusive, which means
       
       
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        * that it will not expand to include text inserted on either side of this span.
       
       
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        */
       
       
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        ss.setSpan(new StyleSpan(Typeface.BOLD), 0, 39,
       
       
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        Spanned.SPAN_INCLUSIVE_INCLUSIVE);
       
       
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        ss.setSpan(new URLSpan("tel:4155551212"), 40 + 6, 40 + 10,
       
       
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        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       
       
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        TextView textViewSpan = (TextView) findViewById(R.id.text_spannable);
       
       
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        textViewSpan.setText(ss);
       
       
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        /*
       
       
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        * Set the movement method to move between links in this TextView.
       
       
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        * This means that the user traverses through links in this TextView, automatically
       
       
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        * handling appropriate scrolling and key commands.
       
       
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        */
       
       
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        textViewSpan.setMovementMethod(LinkMovementMethod.getInstance());
       
       
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        }
       
       
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        }