CODEWITHSUNDEEP
androidandroid-intentandroid-activity
cliff2310
cliff2310

Reputation: 590

ActivityNotFoundException: Unable to find explicit activity class

I am trying to start an activity from my main activity. Its not working and driving me nuts. What I have is:

Intent i = new Intent ("net.xxx.View1");  
Context con = this.getBaseContext();  
ComponentName cn = new ComponentName("net.xxx.Mybooks", "BookView");  
i.setComponent(cn);  
Bundle extras = new Bundle();  
ooo             
i.putExtras(extras);
startActivity(i);     

Manifest is:  
            android:name="BookView" >
        <intent-filter >
            <action   android:name ="android.intent.action.VIEW" />
            <action   android:name ="net.xxx.View1" />       
            <category android:name ="android.intent.category.DEFAULT" />
        </intent-filter>

What I get is:
*02-03 19:34:47.448: E/AndroidRuntime(2027): android.content.ActivityNotFoundException: Unable to find explicit activity class {net.xxx.Mybooks/BookView}; have you declared this activity in your AndroidManifest.xml *
Which would be correct, I think, if the '/' was a '.'

I tried with context and without any componetName, the result is always the same.

SdkVersion="10"
Thanks in advance for your help
Cliff

Upvotes: 3

Views: 10192

Answers (6)

林果皞
林果皞

Reputation: 7793

I have similar problem after refactor my package name, and I finally found that my applicationId value in build.gradle has typo, and Android Studio doesn't give any warning.

Upvotes: 1

Vikram Rao
Vikram Rao

Reputation: 514

Make sure your activity is defined in manifest. I had copy pasted a Activity class and forgotten to add the definition in manifest file and ended up with this problem.

Upvotes: 0

Phuong
Phuong

Reputation: 1251

I also get this when I put Activity-derived class nested in another class, so it can not be found, moving outside solves the problem

Upvotes: 0

Rowan Freeman
Rowan Freeman

Reputation: 16348

I got this problem after I renamed some activities. Make sure you update your AndroidManifest to reflect renaming changes.

Upvotes: 0

cliff2310
cliff2310

Reputation: 590

Well despite the clams of activity not found, the problem was in the new activity. It had a null pointer exception in the code. So I spent a day or so chasing the wrong problem.

Thanks for your time anyway

Cliff

Upvotes: 6

CChi
CChi

Reputation: 3134

Try putting a "." in front of BookView Try doing something like this in your manifest. 

<activity android:name=".BookView" >
    <intent-filter >
        <action   android:name ="android.intent.action.VIEW" />
        <action   android:name ="net.xxx.View1" />       
        <category android:name ="android.intent.category.DEFAULT" />
    </intent-filter>
</activity>

Upvotes: 4

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