Java (Android Studio) Tutorial - Battery Checker -

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    android:background="@android:color/white">

    <TextView
        android:id="@+id/statusLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Charging"
        android:textSize="24sp"
        android:layout_marginTop="60dp"/>

    <ImageView
        android:id="@+id/batteryImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/b50"
        android:layout_marginTop="40dp"/>

    <TextView
        android:id="@+id/percentageLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="49%"
        android:textSize="24sp"
        android:layout_marginTop="30dp"/>

</LinearLayout>