ANDROID – SETTINGS ACTIVITY Template

ANDROID – SETTINGS ACTIVITY  Template

If you need only one screen with a few settings then read this post. If you need multiple sub-screens of setting then you should use the Settings Activity Template. It divides the settings into fragments and groups. Let’s start. Right-click your app’s package and click New > Activity > Settings Activity. Change the title if you wish, and click the 3 dots … at the right of Hierarchical Parent to specify the parent Activity. Click Finish. A new resource directory will be created, xml, and 4 resource XML files. pref_headers.xml…

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Android – Settings Activity

Android – Settings Activity

This post will show how to create a Settings Activity using Preference and PreferenceFragment classes. Right-click the res directory and select New > Android Resource Directory. Select Resource Type the XML value and click OK Right-click the newly created xml directory and then New > XML resource file. Specify the file name and click OK Now add the preference views you want for your settings activity. You need to specify the key and the title. The key is used to store the setting value If you want to keep compatibility…

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Android – Activity callback/hook methods PART 3

Android – Activity callback/hook methods PART 3

You can read Part 1 and Part 2. This part will cover the 7 hook methods: onCreate() – It is called first when activity launched and it is called only one time. Here you initialize the views, bind data to lists etc. Next is onStart() onStart() – It is called when the activity is becoming visible to the user. Next is onResume() only if the activity was at the background and now comes to the foreground. onResume() – It is when the activity starts interacting with the user and it…

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Android – Starting an Activity PART 2

Android – Starting an Activity PART 2

You can read PART 1 here. You can launch activities on demand with startActivity() and startActivityForResult() startActivity() Launches a new activity and it does not return any information when the activity exits. It has one argument, an intent to start. You can read more here. startActivityForResult() Launches an activity and you will get a result when the activity finished. It can take up to 3 arguments, the intent to start, the request code (int) that identifies the request to the 2nd activity and options as a bundle. At the 1st…

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Android – Activity and lifecycle states Part 1

Android – Activity and lifecycle states Part 1

Activity is the most common component in Android app and the most crucial. It is usually used to display information to the device screen but there also times that you do not have to provide a user interface with an activity. To implement an activity you need to follow some steps: Extend the Ativity class Override selected lifecycle/hook methods, those at the picture above define other methods or nested classes needed to implement the activity update the AndroidManifest.xml file to include the activity so Android OS knows about it. Lifecycle…

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