robinpowered / react-native-device-battery

Monitor device battery state changes

react-native-device-battery

Get and observe the devices battery level and charging status

Installation

Install the node module

npm install react-native-device-battery --save

iOS

TBD

Android

Add the following to android/settings.grade

include ':react-native-device-battery'
project(':react-native-device-battery').projectDir = new File(settingsDir, '../node_modules/react-native-device-battery/android')

Add the following to android/app/build.gradle

compile project(':react-native-device-battery')

Register the module in MainActivity.java

import com.robinpowered.react.battery.DeviceBatteryPackage;  // <--- import

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
  ......

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mReactRootView = new ReactRootView(this);

    mReactInstanceManager = ReactInstanceManager.builder()
      .setApplication(getApplication())
      .setBundleAssetName("index.android.bundle")
      .setJSMainModuleName("index.android")
      .addPackage(new MainReactPackage())
      .addPackage(new DeviceBatteryPackage()) // <------ add this line to yout MainActivity class
      .setUseDeveloperSupport(BuildConfig.DEBUG)
      .setInitialLifecycleState(LifecycleState.RESUMED)
      .build();

    mReactRootView.startReactApplication(mReactInstanceManager, "AndroidRNSample", null);

    setContentView(mReactRootView);
  }

  ......

}

Example Usage

import DeviceBattery from 'react-native-device-battery';

// get the battery level
DeviceBattery.getBatteryLevel().then(level => {
  console.log(level); // between 0 and 1
});

// check if the device is charging
DeviceBattery.isCharging().then(isCharging => {
  console.log(isCharging) // true or false
});

// as a listener
var onBatteryStateChanged = (state) => {
  console.log(state) // {level: 0.95, charging: true}
};

// to attach a listener
DeviceBattery.addListener(onBatteryStateChanged);

// to remove a listener
DeviceBattery.removeListener(onBatteryStateChanged);

react-native-device-battery's Issues

Error during compilation

/Users/titto/workspace/babbo/android/app/src/main/java/com/babbo/MainActivity.java:34: error: constructor DeviceBatteryPackage in class DeviceBatteryPackage cannot be applied to given types;
.addPackage(new DeviceBatteryPackage())
^
required: Activity
found: no arguments
reason: actual and formal argument lists differ in length
1 error
:app:compileDebugJavaWithJavac FAILED

(evaluating '_reactNativeDeviceBattery2.default.addListener()')

DeviceBattery.addListener() alone is causing error

undefined is not a function(evaluating '_reactNativeDeviceBattery2.default.addListener()')

Please help me to solve this...

android - change dependency of react native version to '+'

https://github.com/robinpowered/react-native-device-battery/blob/master/android/build.gradle#L33

As in all other react native packages it should be set to '+'.
If there's a minimum react natuve version you should write it in the readme file.
Currently, it is causing an unnecessary download of react native 0.15 to the gradle cache (Although the app is running perfectly because it is overridden).

change compile 'com.facebook.react:react-native:0.15.+'
to compile 'com.facebook.react:react-native:+'

NPM version 3.0.0 is missing

Hey I noticed for later versions of RN this library has a 3.0.0 version release but its not available on npm

Publish recent improvements to npm

Thanks for providing this useful module. I noticed that the npm package was last updated 9 months ago, whereas several improvements have been commited to this repository more recently. May I suggest you publish a new version to the npm?

Is this repo still maintained?

I was just wondering if this repo is still maintained. I need the battery status listener, which we have here. But the remove listener is missing and only needs to be merged to the lib.

If it's not maintained, can anybody recommend another package with that functionality?

removeListener method missing

Hi
The docs refer to DeviceBattery.removeListener(onBatteryStateChanged);, but this method seems to be missing from the code and throws a TypeError.

getBatteryLevel doesn't get an updated battery level on Android

Hey guys,

I've been trying to use your library to take snapshots of a device's battery drain while apps are running in the background on Android. Unfortunately, it seems that .getBatteryLevel() doesn't return an updated battery level even when called 30-60 minutes later with clear battery loss of 4-5%. I'm keeping the app in the foreground, so I don't think that background state would be an issue.

I noticed that Intent.ACTION_BATTERY_CHANGED is a sticky intent, so I thought that the sticky intent caching values could be the issue. I tried adding changing `public void getBatteryLevel(Promise promise) to:

public void getBatteryLevel(Promise promise) {
   if (batteryStatus != null) {
      float batteryPercentage = getBatteryPrecentageFromIntent(batteryStatus);
      promise.resolve((double) batteryPercentage);

      getReactApplicationContext().removeStickyBroadcast(batteryStatus);
      IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
      batteryStatus = getReactApplicationContext().registerReceiver(batteryStateReceiver, filter);
   } else {
      promise.reject("Battery manager is not active");
   }
}

I was hoping that removing the intent and reregistering it would invalidate the cache, but it seems it doesn't or that this is not the source of the problem.

The only way I could get getBatteryLevel() to detect a new value was by closing the app and reinstalling or by reloading the JS. Even by doing this I could only get getBatteryLevel() to return a new value when there was a significant change (from .28000000011920929 to .28999999165534973), but finer grained changes were impossible to detect.

I'm aware that this may be an Android API problem and not a problem with your code. Have you had any experience dealing with this kind of issue?

Thanks!

Battery doest not work when app in background

Battery doest not work in android when app in background (minimized).
I have error:

error Error: Battery manager is not active
    at createErrorFromErrorData (E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\NativeModules.js:123)
    at E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\NativeModules.js:80
    at MessageQueue.__invokeCallback (E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:400)
    at E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:139
    at MessageQueue.__guardSafe (E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:316)
    at MessageQueue.invokeCallbackAndReturnFlushedQueue (E:\projects\project_name\node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:138)
    at debuggerWorker.js:72

Please fix it.
I use
"react-native": "0.54.4",
"react-native-background-task": "0.2.1"

some code:

file battery
export const getLevel = onLevel => {
  DeviceBattery.getBatteryLevel().then(level => {
    const battery_level = Math.round(level * 100);
    onLevel(battery_level);
  });
}

file in use
import * as Battery from '../battery';

try {
        DeviceBattery.getBatteryLevel().then(level => {
            const battery_l = Math.round(level * 100);
        });
 } catch (e) {
        console.log("error", e);
}

Does this package work in the iOS simulator?

Package works on Android for me, but on iOS the listener never fires and getting the device battery returns -1. Is this a configuration problem on my end, or is the simulator not have a battery to track?

getBatteryLevel & isCharging don't update result

Calling the 2 main functions getBatteryLevel & isCharging don't change result after the first call.
For example, calling isCharging when the phone is connected will return true, disconnecting the phone and calling the function again will still return true.

Using the listener the disconnect event is captured but i would prefer to just use the 2 functions.
I'm not sure what's causing this issue.

Thanks

ios 下应该如何使用啊，等文档更新

ios 下应该如何使用啊，等文档更新

Readme not up to date?

Hi,

I am not sure, if I am missing something. But, my MainActivity.java file (Android) does not look like the one in your Readme:

This is yours:

import com.robinpowered.react.battery.DeviceBatteryPackage;  // <--- import

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
  ......

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mReactRootView = new ReactRootView(this);

    mReactInstanceManager = ReactInstanceManager.builder()
      .setApplication(getApplication())
      .setBundleAssetName("index.android.bundle")
      .setJSMainModuleName("index.android")
      .addPackage(new MainReactPackage())
      .addPackage(new DeviceBatteryPackage()) // <------ add this line to yout MainActivity class
      .setUseDeveloperSupport(BuildConfig.DEBUG)
      .setInitialLifecycleState(LifecycleState.RESUMED)
      .build();

    mReactRootView.startReactApplication(mReactInstanceManager, "AndroidRNSample", null);

    setContentView(mReactRootView);
  }

  ......

}

This is mine:

package com.xxxxx;

import com.facebook.react.ReactActivity;

public class MainActivity extends ReactActivity {

    /**
     * Returns the name of the main component registered from JavaScript.
     * This is used to schedule rendering of the component.
     */
    @Override
    protected String getMainComponentName() {
        return "xxxxxx";
    }
}

When I try to build the app I see errors like:

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {
                                  ^
  symbol: class Activity

My questions are:

• do I really need to add onCreate here and not in the MainApplication.java file instead?
• does it work with react-native 0.50.3?

Thanks for your help.

Battery is not active

When I want use this package in background service I get "Battery is not active"

Battery detect stop working when maximize app

sorry. another module..

Update instructions to reflect package arguments

Currently the instructions call for new DeviceBatteryPackage().

It should be new DeviceBatteryPackage(this).

Discovered in #1