Android Application Development Cookbook: 93 Recipes for Building Winning Apps

Recipe 1.1 Linking Activities

Android Versions

Level 1 and above

Permissions

None

Source Code to Download at Wrox.com

Linking.zip

Unless you are writing a Hello World application, chances are good that your application contains several activities that you need to connect in order to form a cohesive application. This recipe shows you the various ways to link to another activity in your Android application.

Solution

Suppose you have two activities in your application. The following AndroidManifest.xml file shows the two activities classes, MainActivity and Activity2:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="net.learn2develop.linking"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity 
            android:name=".Activity2"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="net.learn2develop.Activity2" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>       

    </application>

</manifest>

Assuming you are currently in the MainActivity ...