How to pass POJOs / data / values between activities?

[James Elsey]

I have 2 activities

The first one grabs contact details from the ContactsContract provider

The second one displays values on a map

In the first activity, how can I pass values to the second activity?

[James Elsey]

I've found the android.app.Application class but am having some troubles getting it to work

~I'm currently getting a classCastException and I don't understand why

My "Global State" object :

  


import android.app.Application;

public class GlobalState extends Application
{
	private String testMe;

	public String getTestMe() {
		return testMe;
	}

	public void setTestMe(String testMe) {
		this.testMe = testMe;
	}
	
	
}  

This is how I'm trying to set something :

 try
	    {
	    	GlobalState gs = (GlobalState) getApplication();
	    	gs.setTestMe("TEST");

	    }
	    catch (Exception e)
	    {
	    	e.printStackTrace();
	    }

I'm getting a classCast exception on the GlobalState gs = (GlobalState) getApplication();

Any ideas?

[Lester Burnham]

Post the relevant part of the AndroidManifest.xml file where you to tell Android to use the GlobalState class. Seeing the actual exception (full stack trace) would also help.

[James Elsey]

Hi,

I've been looking at some tutorials, and they mention to include the "global state" class in the manifest file

I've tried their suggestion of including this, but if I put in an application tag, the manifest file won't be valid, as I already have one application set of tags

This is my manifest

  <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.jameselsey"
      android:versionCode="1"
      android:versionName="1.0">
      
     <uses-permission android:name="android.permission.INTERNET" />
			<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
			<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission>
			<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
    

   
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".DefaultActivity"
                  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=".MyContactsActivity"
                  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=".MyMapsActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        
		<uses-library android:name="com.google.android.maps" />
    </application>
    <uses-sdk android:minSdkVersion="8" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />
</manifest>   

[Lester Burnham]

According to the page you linked to, registering a different Application class does not involve adding another <application> tag, but adding an "android:name" attribute to the <application> tag that's already there.

[Piyush Patel]

Hi,James

I faced same situation !
in my case i created Static List<Pojo.Class> myList in Activity #1. &added pojo to List by myList.add(pojoObj);
then retried the Pojos in Activity #2 using Activity1.myList Object ;

Done ! i don't know if this is Optimal solution to the problem !!
neways hope this will help you.

Best Regards,
piyushnp

[James Elsey]

Cheers guys, I figured it out.

Basically I needed to modify the existing application tag, and to add

android:name="com.jameselsey.GlobalState"

I was trying is as ".GlobalState", didn't realise it needed to be the fully qualified name