Activity Declaration in AndroidManifest.xml

Question

I have a runtime error on my stock quoting application. I have an app where you input your a stock (as in stock market) code and will list it with two buttons. One button to display a quote and the other to view more info from the web. The web function is fine but the app crashes when I hit the quote button.

LogCat is asking me whether I declared my activity in my AndroidManifest.xml. I am still new to Android development so this is the best of which I can analyze the problem. I am not sure where to look for these errors.

Just use 'mstf' as a stock code if you need to test a fix.

You can find my app here: https://github.com/xamroc/StockQuote/tree/bug-quote

I would also appreciate any tips on debugging tools or techniques for Android.

Are these similar? http://stackoverflow.com/questions/5734214/what-is-wrong-with-my-androidmanifest-xml http://stackoverflow.com/questions/7857015/activitynotfound-exception-thrown-for-preferenceactivity-listed-in-androidmanife http://stackoverflow.com/questions/15699192/have-you-declared-this-activity-in-your-androidmanifest-xml — dcanh121, Oct 01 '13 at 18:23

score 38 · Accepted Answer · edited Aug 21 '17 at 14:36

38

You have two activities in your package, but have only declared one in manifest.

Declare the other Activity class:

Add this to your manifest:

<activity
     android:name="com.example.stockquote.StockInfoActivity"
     android:label="@string/app_name" />

edited Aug 21 '17 at 14:36

Vishal Yadav

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answered Oct 01 '13 at 17:37

Manishika

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Why is it necessary to register both activities? Are there any reasons? – ersks Jul 08 '16 at 08:57
Yes it is necessary to declare all the activities in manifest because it presents essential information about your app to the Android system, information the system must have before it can run any of the app's code. Check this Link for more info : https://developer.android.com/guide/topics/manifest/manifest-intro.html – Manishika Jul 11 '16 at 18:45
Thanks for delivering this information. I am researching about such matter & found match between your text & other researched matters. – ersks Jul 12 '16 at 10:44

score 18 · Answer 2 · answered Oct 01 '13 at 17:36

Insert this <activity android:name=".StockInfoActivity" ></activity> in your AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.stockquote"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="9"
        android:targetSdkVersion="18" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.stockquote.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="com.example.stockquote.StockInfoActivity" >
        </activity>
    </application>

score 2 · Answer 3 · answered May 10 '19 at 10:12

so when ever you create a new class you have to create an activity in the "AndroidManifest.xml" file inside the application tag like this::

`

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".mainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name=".loginActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

`

score 1 · Answer 4 · edited Nov 29 '15 at 12:36

Source: http://developer.android.com/guide/components/activities.html

You must declare your activity in the manifest file in order for it to be accessible to the system. To declare your activity, open your manifest file and add an <activity> element as a child of the <application> element. For example:
<manifest ... >
  <application ... >
      <activity android:name=".ExampleActivity" />
      ...
  </application ... >
  ...
</manifest >
There are several other attributes that you can include in this element, to define properties such as the label for the activity, an icon for the activity, or a theme to style the activity's UI.

The android:name attribute is the only required attribute—it specifies the class name of the activity. Once you publish your application, you should not change this name, because if you do, you might break some functionality, such as application shortcuts.

score 1 · Answer 5 · answered Jun 16 '16 at 03:49

1

Your Activity means you have to declare your each and every class in android manifest so that it recognizes them as the Activity.So after the end of the Activity main you can do following:

<activity
 android:name=".YourClassNAME"

/>

answered Jun 16 '16 at 03:49

Niroj

1,114
6
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score 1 · Answer 6 · edited Sep 04 '17 at 10:38

1

you should declare the activity in manifest xml by defining the launchMode to singleTask or singleInstance.example:

<activity android:name="com.example.h.myapplication.MainActivity" 
          android:launchMode="singleTask" >

edited Sep 04 '17 at 10:38

Srini

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answered Sep 01 '16 at 14:53

shadi

21
3

Activity Declaration in AndroidManifest.xml

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