Getting started with android-activity
Remarks#
This section provides an overview of what android-activity is, and why a developer might want to use it.
It should also mention any large subjects within android-activity, and link out to the related topics. Since the Documentation for android-activity is new, you may need to create initial versions of those related topics.
Installation or Setup
Detailed instructions on getting android-activity set up or installed.
Activity
Activity is complete screen. UI is XML based and
package com.example.android.activity;
import android.os.Bundle;
import android.app.Activity;
public class MainActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
NOTE Activity must be declared in AndroidManifest.xml
before using it.
E.g:
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Every activity has its layout file in xml
format, we include its layout using setContentView method of Activity class. E.g. setContentView(R.layout.activity_main)
Layout file example
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="https://schemas.android.com/apk/res/android"
xmlns:tools="https://schemas.android.com/tools"
android:id="@+id/activity_dashboard"
android:layout_width="match_parent"
android:layout_height="match_parent">
//Add other views here
</LinearLayout>