Category: Android Tutorials

December 29, 2019

Android – Get battery level and percentage programmatically

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    tools:context=".MainActivity"
    android:background="#d5ebfa"
    >
    <ProgressBar
        android:id="@+id/pb"
        android:layout_width="150dp"
        android:layout_height="150dp"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:progressDrawable="@drawable/progressbar_states"
        android:layout_centerInParent="true"
        />
    <TextView
        android:id="@+id/tv_percentage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="25dp"
        android:textColor="#000"
        android:layout_centerInParent="true"
        />
    <TextView
        android:id="@+id/tv_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="20dp"
        />
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:padding="16dp"

tools:context=".MainActivity"

android:background="#d5ebfa"

<ProgressBar

android:id="@+id/pb"

android:layout_width="150dp"

android:layout_height="150dp"

style="@android:style/Widget.ProgressBar.Horizontal"

android:progressDrawable="@drawable/progressbar_states"

android:layout_centerInParent="true"

<TextView

android:id="@+id/tv_percentage"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="25dp"

android:textColor="#000"

android:layout_centerInParent="true"

<TextView

android:id="@+id/tv_info"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textSize="20dp"

</RelativeLayout>

in drawable create once xml file to percentage in style progressbar_states.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape
            android:shape="oval">
            <stroke
                android:width="5dp"
                android:color="#d0d4d7"
                />
            <solid android:color="#eef2f5"/>
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip android:clipOrientation="vertical" android:gravity="bottom">
            <shape
                android:shape="oval">
                <stroke
                    android:width="5dp"
                    android:color="#ff0001"
                    />
                <gradient
                    android:startColor="#7fc97c"
                    android:endColor="#99f396"
                    android:centerColor="#89e386"
                    android:angle="270"
                    android:gradientRadius="50"
                    android:centerY=".50"
                    />
            </shape>
        </clip>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

<shape

android:shape="oval">

<stroke

android:width="5dp"

android:color="#d0d4d7"

</shape>

</item>

<shape

android:shape="oval">

<stroke

android:width="5dp"

android:color="#ff0001"

<gradient

android:startColor="#7fc97c"

android:endColor="#99f396"

android:centerColor="#89e386"

android:angle="270"

android:gradientRadius="50"

android:centerY=".50"

</shape>

</clip>

</item>

</layer-list>

MainActivity.java

package com.androindian.battery;

import androidx.appcompat.app.AppCompatActivity;

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 android.view.Window;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    private Context mContext;
    private TextView mTextViewInfo;
    private TextView mTextViewPercentage;
    private ProgressBar mProgressBar;
    private int mProgressStatus = 0;

    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE,-1);
            mTextViewInfo.setText("Battery Scale : " + scale);


            int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);
            mTextViewInfo.setText(mTextViewInfo.getText() + "\nBattery Level : " + level);


            float percentage = level/ (float) scale;
            mProgressStatus = (int)((percentage)*100);
            mTextViewPercentage.setText("" + mProgressStatus + "%");
            mTextViewInfo.setText(mTextViewInfo.getText() +
                    "\nPercentage : "+ mProgressStatus + "%");
            mProgressBar.setProgress(mProgressStatus);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // Request window feature action bar
        requestWindowFeature(Window.FEATURE_ACTION_BAR);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Get the application context
        mContext = getApplicationContext();

        IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
        mContext.registerReceiver(mBroadcastReceiver,iFilter);

        mTextViewInfo = (TextView) findViewById(R.id.tv_info);
        mTextViewPercentage = (TextView) findViewById(R.id.tv_percentage);
        mProgressBar = (ProgressBar) findViewById(R.id.pb);
    }
}

package com.androindian.battery;

import androidx.appcompat.app.AppCompatActivity;

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 android.view.Window;

import android.widget.ProgressBar;

import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

private Context mContext;

private TextView mTextViewInfo;

private TextView mTextViewPercentage;

private ProgressBar mProgressBar;

private int mProgressStatus = 0;

private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE,-1);

mTextViewInfo.setText("Battery Scale : " + scale);

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);

mTextViewInfo.setText(mTextViewInfo.getText() + "\nBattery Level : " + level);

float percentage = level/ (float) scale;

mProgressStatus = (int)((percentage)*100);

mTextViewPercentage.setText("" + mProgressStatus + "%");

mTextViewInfo.setText(mTextViewInfo.getText() +

"\nPercentage : "+ mProgressStatus + "%");

mProgressBar.setProgress(mProgressStatus);

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

// Request window feature action bar

requestWindowFeature(Window.FEATURE_ACTION_BAR);

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// Get the application context

mContext = getApplicationContext();

IntentFilter iFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);

mContext.registerReceiver(mBroadcastReceiver,iFilter);

mTextViewInfo = (TextView) findViewById(R.id.tv_info);

mTextViewPercentage = (TextView) findViewById(R.id.tv_percentage);

mProgressBar = (ProgressBar) findViewById(R.id.pb);

}

output

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apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.androindian.fragment"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            dataBinding.enabled=true
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

apply plugin: 'com.android.application'

android {

compileSdkVersion 28

defaultConfig {

applicationId "com.androindian.fragment"

minSdkVersion 15

targetSdkVersion 28

versionCode 1

versionName "1.0"

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

}

buildTypes {

release {

dataBinding.enabled=true

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

}

dependencies {

implementation fileTree(dir: 'libs', include: ['*.jar'])

implementation 'com.android.support:appcompat-v7:28.0.0'

implementation 'com.android.support.constraint:constraint-layout:1.1.3'

testImplementation 'junit:junit:4.12'

androidTestImplementation 'com.android.support.test:runner:1.0.2'

androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

}

Then will continue...

Category: Android Tutorials

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