Android example source code file (Link.java)

This example Android source code file (Link.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

activity, android, app, click, html, java, link, os, override, spannablestring, style, text, textview, ui, urlspan

The Link.java Android example source code

/*
 * Copyright (C) 2007 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.apis.text;

import com.example.android.apis.R;

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;

public class Link extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.link);

        // text1 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.

        // text2 has links specified by putting <a> tags 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 t2 = (TextView) findViewById(R.id.text2);
        t2.setMovementMethod(LinkMovementMethod.getInstance());

        // text3 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 t3 = (TextView) findViewById(R.id.text3);
        t3.setText(
            Html.fromHtml(
                "<b>text3:  Text with a " +
                "<a href=\"http://www.google.com\">link " +
                "created in the Java source code using HTML."));
        t3.setMovementMethod(LinkMovementMethod.getInstance());

        // text4 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(
            "text4: Click here to dial the phone.");

        ss.setSpan(new StyleSpan(Typeface.BOLD), 0, 6,
                   Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss.setSpan(new URLSpan("tel:4155551212"), 13, 17,
                   Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        TextView t4 = (TextView) findViewById(R.id.text4);
        t4.setText(ss);
        t4.setMovementMethod(LinkMovementMethod.getInstance());
    }
}