Sunday, August 16, 2020

android kotlin - Get battery health programmatically

MainActivity.kt

package com.example.jetpack

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.os.BatteryManager
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*


class MainActivity : AppCompatActivity() {

    // initialize a new broadcast receiver instance
    private val receiver:BroadcastReceiver = object: BroadcastReceiver(){
        override fun onReceive(context: Context?, intent: Intent?) {
            val health = when(intent?.getIntExtra(
                BatteryManager.EXTRA_HEALTH,-1
            )){
                // determine the battery health from intent
                BatteryManager.BATTERY_HEALTH_COLD -> "Cold"
                BatteryManager.BATTERY_HEALTH_DEAD -> "Dead"
                BatteryManager.BATTERY_HEALTH_GOOD -> "Good"
                BatteryManager.BATTERY_HEALTH_OVERHEAT -> "Over heat"
                BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE -> "Over voltage"
                BatteryManager.BATTERY_HEALTH_UNKNOWN -> "Unknown"
                BatteryManager
                    .BATTERY_HEALTH_UNSPECIFIED_FAILURE -> "Unspecified failure"
                else -> "Error"
            }

            textView.text = "Battery Health : $health"
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // initialize a new intent filter instance
        val filter = IntentFilter(Intent.ACTION_BATTERY_CHANGED)

        // register the broadcast receiver
        registerReceiver(receiver,filter)
    }
}
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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:id="@+id/constraintLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#EDEAE0"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:fontFamily="sans-serif-condensed"
        android:gravity="center"
        android:padding="32dp"
        android:textColor="#0014A8"
        android:textSize="35sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.25"
        tools:text="TextView" />

</androidx.constraintlayout.widget.ConstraintLayout>