1excludeFromSuggestions=true
2page.title=Notepad Extra Credit
3parent.title=Notepad Tutorial
4parent.link=index.html
5@jd:body
6
7
8<p><em>In this exercise, you will use the debugger to look at the work you did
9in Exercise 3. This exercise demonstrates:</em></p>
10<ul>
11<li><em>How to set breakpoints to observe execution</em> </li>
12<li><em>How to run your application in debug mode</code></em></li>
13</ul>
14
15<div style="float:right;white-space:nowrap">
16
17	[<a href="notepad-ex1.html">Exercise 1</a>]
18	[<a href="notepad-ex2.html">Exercise 2</a>]
19	[<a href="notepad-ex3.html">Exercise 3</a>]
20	<span style="color:#BBB;">
21		[<a href="notepad-extra-credit.html" style="color:#BBB;">Extra Credit</a>]
22	</span>
23</div>
24
25<h2>Step 1</h2>
26
27<p>Using the working <code>Notepadv3</code>, put breakpoints in the code at the
28    beginning of the <code>onCreate()</code>, <code>onPause()</code>,
29    <code>onSaveInstanceState()</code> and <code>onResume()</code> methods in the
30    <code>NoteEdit</code> class (if you are not familiar with Eclipse, just
31    right click in the narrow grey border on the left of the edit window at the
32    line you want a breakpoint, and select <em>Toggle Breakpoint</em>, you
33should see a blue dot appear).</p>
34
35<h2>Step 2</h2>
36
37<p>Now start the notepad demo in debug mode:</p>
38
39<ol type="a">
40    <li>
41      Right click on the <code>Notepadv3</code> project and from the Debug menu
42      select <em>Debug As -&gt; Android Application.</em></li>
43    <li>
44      The Android emulator should say <em>"waiting for debugger to connect"</em>
45      briefly and then run the application.</li>
46  <li>
47      If it gets stuck on the waiting... screen, quit the emulator and Eclipse,
48      from the command line do an <code>adb kill-server</code>, and then restart
49Eclipse and try again.</li></ol>
50
51      <h2>Step 3</h2>
52
53<p>When you edit or create a new note you should see the breakpoints getting
54    hit and the execution stopping.</p>
55
56    <h2>Step 4</h2>
57
58<p>Hit the Resume button to let execution continue (yellow rectangle with a
59green triangle to its right in the Eclipse toolbars near the top).</p>
60
61<h2>Step 5</h2>
62
63<p>Experiment a bit with the confirm and back buttons, and try pressing Home and
64    making other mode changes. Watch what life-cycle events are generated and
65when.</p>
66
67<p>The Android Eclipse plugin not only offers excellent debugging support for
68your application development, but also superb profiling support. You can also
69try using <a href="{@docRoot}tools/help/traceview.html">Traceview</a> to profile your application. If your application is running too slow, this can help you
70find the bottlenecks and fix them.</p>
71
72