Question

Hi I am new to android and I have created 2 projects.

Now I want to call an activity in the second project from the first project upon a button click.

The 1st project only handles login screen and when I click on the login button I need to call an activity which is present in the second project.

I searched the net but didn’t find any tutorials which I understood properly.

Hi I found the following error.

01-30 08:36:47.230: E/dalvikvm(3408): Could not find class 'com.androidhive.googleplacesandmaps.MainActivity', referenced from method org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground
01-30 08:36:52.587: E/AndroidRuntime(3408): FATAL EXCEPTION: AsyncTask #1
01-30 08:36:52.587: E/AndroidRuntime(3408): java.lang.RuntimeException: An error occured while executing doInBackground()
01-30 08:36:52.587: E/AndroidRuntime(3408):     at android.os.AsyncTask$3.done(AsyncTask.java:299)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.run(FutureTask.java:239)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.lang.Thread.run(Thread.java:856)
01-30 08:36:52.587: E/AndroidRuntime(3408): Caused by: java.lang.NoClassDefFoundError: com.androidhive.googleplacesandmaps.MainActivity
01-30 08:36:52.587: E/AndroidRuntime(3408):     at org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground(LoginActivity.java:69)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at org.fluturasymphony.recommendation.LoginActivity$DownloadWebPageTask.doInBackground(LoginActivity.java:1)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at android.os.AsyncTask$2.call(AsyncTask.java:287)
01-30 08:36:52.587: E/AndroidRuntime(3408):     at java.util.concurrent.FutureTask.run(FutureTask.java:234)
01-30 08:36:52.587: E/AndroidRuntime(3408):     ... 3 more

I have declared the manifest as this.

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

    <uses-sdk android:minSdkVersion="9"
              android:targetSdkVersion="11" />
    <uses-permission android:name="android.permission.INTERNET" />    
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
        <activity android:label="@string/app_name" android:name=".LoginActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <activity android:name="org.achartengine.GraphicalActivity" />
        <activity android:name=".CategoryWiseSalesChartActivity" />
        <activity android:name=".ProductWiseSalesChartActivity" />
        <activity android:name="com.androidhive.googleplacesandmaps.MainActivity"/>
        <activity android:label="@string/home_screen" android:name=".HomeActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/store_screen" android:name=".StoreActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/store_list_screen" android:name=".StoreListActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/location_screen" android:name=".StoreMapActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/recommended_products_list_screen" android:name=".RecommendedProductsListActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/category_wise_sales_screen" android:name=".CategoryWiseSalesActivity" android:configChanges="orientation">            
        </activity>
        <activity android:label="@string/product_wise_sales_screen" android:name=".ProductWiseSalesActivity" android:configChanges="orientation">            
        </activity>
                <uses-library android:name="com.google.android.maps" />


    </application>



</manifest>

And I am calling the activity in the 2nd class like this.

Intent loginintent = new Intent("com.androidhive.googleplacesandmaps.MainActivity");
                        startActivity(loginintent);

Is this right??

Answer 1

According to Android you can handle this by making the project Library and then Define it in the manifest file and call it in what ever manner you want

for an explanation i did this as per my requirement
the activity you want to call on Button click Define it in the Manifest with its full package name and then when you call it on button click the activity of the new project will trigger
the sample to do this is following
in the manifest file of your 1st project define some thing like this

<activity 
        android:name="packagefull.activityname"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen">

    </activity>

in the package name define the full path of the the activity you want to call and after the package name give the name of the activity
hope this will work for you as this worked perfect for me