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POAndroid Activity Navigation
 

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    <p>I'm very new to android development and I'm working on an application where I have 4 activities. Each activity needs to be able to navigate to any of the other 3. So I created 4 buttons at the top of each activity that allow for this. The XML code looks like this:</p> <pre><code>&lt;Button ... android:onClick="loadProfileLayout"/&gt; &lt;Button ... android:onClick="loadRulesLayout"/&gt; &lt;Button ... android:onClick="loadSettingsLayout"/&gt; &lt;Button ... android:onClick="loadHelpLayout"/&gt; </code></pre> <p>the manifest has an activity tag for each:</p> <pre><code> &lt;activity android:name=".Profiler" android:label="@string/app_name"&gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;activity android:name="Rules"&gt;&lt;/activity&gt; &lt;activity android:name="Settings"&gt;&lt;/activity&gt; &lt;activity android:name="Help"&gt;&lt;/activity&gt; </code></pre> <p>And the functions called are these:</p> <pre><code>public void loadProfileLayout() { startActivity(new Intent(this, Profiler.class)); } public void loadRulesLayout(View v) { startActivity(new Intent(this, Rules.class)); } public void loadSettingsLayout(View v) { startActivity(new Intent(this, Settings.class)); } public void loadHelpLayout(View v) { startActivity(new Intent(this, Help.class)); } </code></pre> <p>So initially this works. From the main "Profile" activity I am able to navigate to any of the other 3. And from the other 3 I can navigate anywhere but back to the main one. When I press the main activity button the application crashes. I try and debug, but it doesn't even appear to be executing loadProfileLayout(). Eclipse opens a "View.class" file with the contents of basically "Source not found". If I press F8 to continue debugging it loads "ZygoteInit$MethodAndArgsCaller.run()"... again, "Source not found". Pressing F8 again will load the error message in the emulator "Sorry! The application has stopped unexpectedly. Please try again."</p> <p>Again, I am new to Android and all I know of activities is what I've been reading on the dev website. Am I making a fundamental mistake here I am not aware of?</p> <p>Thanks,<br> Nate</p>
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    1. COI'm not sure if this is causing you any grief but you'll also want to change the names in your <activity> tags to have . (period) before them. For example, <activity android:name="Rules"></activity> should be <activity android:name=".Rules"></activity>.
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