1. which method creates an intent to start another activity? course hero

What do you need in a first activity?

All we need in our first activity is a button, which, when pressed, will take us to the next activity. By default, we have the ConstraintLayout set. As we aren’t dealing with a lot of items, we will let it be like this.

What is the first line of code?

In the first line of code, we describe the intent and give it the source and destination activities.

What is the default name for Main2Activity?

The default settings will name this activity as ‘Main2Activity’ .

Is the source and destination activity reversed?

This is pretty much the same as the code in the first activity. With just the source and destination activities reversed.

How to start an activity?

To start an activity, call startActivity () and pass it your Intent. The system receives this call and starts an instance of the Activity specified by the Intent.

What is the name of the method in your activity that the system calls when the user clicks the button?

The android:onClick attribute’s value, "sendMessage", is the name of a method in your activity that the system calls when the user clicks the button.

How to create an activity in Eclipse?

To create a new activity using Eclipse: Click New in the toolbar. In the window that appears, open the Android folder and select Android Activity. Click Next. Select BlankActivity and click Next. Fill in the activity details: Project: MyFirstApp. Activity Name: DisplayMessageActivity.

What does intent mean in an app?

The Intent represents an app’s "intent to do something.". You can use intents for a wide variety of tasks, but most often they’re used to start another activity. Inside the sendMessage () method, create an Intent to start an activity called DisplayMessageActivity:

What API level is ActionBar?

Because the ActionBar APIs are available only on HONEYCOMB (API level 11) and higher, you must add a condition around the getActionBar () method to check the current platform version. Additionally, you must add the @SuppressLint ("NewApi") tag to the onCreate () method to avoid lint errors.

What is the parent activity name?

The android:parentActivityName attribute declares the name of this activity's parent activity within the app's logical hierarchy. The system uses this value to implement default navigation behaviors, such as Up navigation on Android 4.1 (API level 16) and higher. You can provide the same navigation behaviors for older versions of Android by using the Support Library and adding the <meta-data> element as shown here.

What is the oncreate method in Activity?

All subclasses of Activity must implement the onCreate () method. The system calls this when creating a new instance of the activity. This method is where you must define the activity layout with the setContentView () method and is where you should perform initial setup for the activity components.

Why does my second activity start but empty?

This is because the second activity uses the empty layout provided by the template.

What is the class parameter of an app component?

The Class parameter of the app component, to which the system delivers the Intent, is, in this case, the activity to start.

How to empty activity in Project?

In the Project window, right-click the app folder and select New > Activity > Empty Activity.

Why is context parameter used first?

The Context parameter is used first because the Activity class is a subclass of Context. The Class parameter of the app component, to which the system delivers the Intent, is, in this case, the activity to start. The putExtra () method adds the value of EditText to the intent.

Why is a key a constant?

Your key is a public constant EXTRA_MESSAGE because the next activity uses the key to retrieve the text value. It's a good practice to define keys for intent extras with your app's package name as a prefix. This ensures that the keys are unique, in case your app interacts with other apps.