is Enough Battery - Android Hardware

Android examples for Hardware:Battery

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Description

is Enough Battery

Demo Code


//package com.java2s;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.os.BatteryManager;
import android.preference.PreferenceManager;

public class Main {
    public static Boolean isEnoughBattery(Context context) {
        SharedPreferences pref = PreferenceManager
                .getDefaultSharedPreferences(context);
        Float acceptableBatteryLevel = Float.parseFloat(pref.getString(
                "pref_battery_level", "40.0f"));
        Float batteryLevel = getBatteryLevel(context);

        return (batteryLevel >= acceptableBatteryLevel || isCharging(context));
    }//from   w ww.ja v  a2 s  . co m

    private static Float getBatteryLevel(Context context) {
        Intent batteryIntent = context.registerReceiver(null,
                new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
        int level = batteryIntent.getIntExtra(BatteryManager.EXTRA_LEVEL,
                -1);
        int scale = batteryIntent.getIntExtra(BatteryManager.EXTRA_SCALE,
                -1);

        // Error checking that probably isn't needed but I added just in case.
        if (level == -1 || scale == -1) {
            return 50.0f;
        }

        return ((float) level / (float) scale) * 100.0f;
    }

    private static Boolean isCharging(Context context) {
        IntentFilter ifilter = new IntentFilter(
                Intent.ACTION_BATTERY_CHANGED);
        Intent batteryStatus = context.registerReceiver(null, ifilter);
        int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS,
                -1);

        return status == BatteryManager.BATTERY_STATUS_CHARGING
                || status == BatteryManager.BATTERY_STATUS_FULL;
    }
}

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