Android : Get Battery Current Values Forthe Android Phone
Mar 13, 2010
I am trying to collect power usage statistics for the Android G1 Phone. I am interested in knowing the values of Voltage and Current, and then able to collect statistics as reported in this PDF.
I am able to get the value of Battery voltage through registering for an intent receiver to receive the Broadcast for ACTION_BATTERY_CHANGED. But the problem is that Android does not expose the value of current through this SDK interface.
One way I tried is via sysfs interface, where I can view the battery current value from adb shell, using the following command
$cat /sys/class/power_supply/battery/batt_current
449
But that too works only if the phone is connected via USB interface. If I disconnect the phone, I see the value of batt_current as '0'. I am not sure why the value of current reported is zero. It should be more than zero, right?
Any suggestion / pointers for getting battery current value?
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Oct 19, 2010
I have an application which has 2 screens. When a value is changed in the second screen and when the first screen is called, the value must be updated on the button of first screen.
But I am not able to update the value on any of the widget of first screen. But I am able to see that I am getting the value, But when it comes to updating the same on button it does not happen.
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Sep 16, 2010
I have a preferences page which is defined by XML - including some default values. I use a PreferenceActivity to display and handle this page. Whenever I use this page to set the preferences the preference file on the file system is updated properly - I can see this via adb. However, whenever I go back to the settings page after have changed some of the settings, it's the defaults that are shown. Worse than that, if I press back without changing any settings, it then sets the, all back to the default. How I can get the prefs to actually show the current settings? My PreferenceActivityis created thus:
@Override protected void onCreate(Bundle savedInstanceState) {
PreferenceManager.getDefaultSharedPreferences(this) .registerOnSharedPreferenceChangeListener(this);
setDefaults(this); super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.settings); }
The XML looks like this:
<?xml version="1.0" encoding="utf-8"?> <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<ListPreference android:id="@+id/numberOfYearsList"
android:key="numberOfYears" android:title="Number of Years to Read the Bible"
android:summary="How many years would you like to take to read through the reading plan?"
android:entries="@array/numberOfYears" android:entryValues="@array/numberOfYears"
android:dialogTitle="How Many Years?" android:defaultValue="1" />
<CheckBoxPreference android:key="ignoreDates" android:id="@+id/ignoreDatesCheckbox"
android:title="Ignore Dates" android:summary="Would you like to use the dates in the plan?"
android:defaultValue="false" /> </PreferenceScreen>
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Aug 5, 2010
Currently, I'm using the following code across all of my activities in my app to store application level variables and carry values between activities..
prefs = this.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE);
I didn't have a PreferenceActivity prior to this, but now I do and I am looking to store a few user prefs from this new PreferenceActivity in the same sharedPreferences tag, "MyPrefs".
I know I can access the PreferenceActivity SharedPrefs from my activities via
prefs = PreferenceManager.getDefaultSharedPreferences(this);
but I would like those values saved to my current sharedPreferences tag, "MyPrefs", but I'm not sure how to do this.
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Aug 18, 2010
I am new to the android programming environment. I am currently working on a project which deals with the user's phone battery level.I am showing the current battery level left on the phone.now i want to display the amount of duration of "idle time, talk time, video playback, audio playback and web surfing" that can be done based on the current battery level. What kind of approach shall i follow.(or) What available API shall i use to get those.
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Feb 18, 2009
Is there a way to get the current battery status of the device (battery level and if the battery is currently charging). The only way I found so far is by using a Broadcast receiver to "listen" for battery status changes. Is there a way to get the battery status using a direct API call? I my case, I would like to check if the battery has sufficient charge (or is being currently charged) before starting the download of some (potentially large) files.
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Jan 1, 2010
So i am working on the m900 battery issue right now and we know exactly what is wrong with the meter reporting values (samsung set 15% to = 3.74V while the nominal voltage is 3.7 so it reports 15% when it is really more like 60-40% somewhere in that region).Does the behold 2 suffer from this same problem or is there really a battery life from full charge to phone wont turn on?If you dont have this issue, and have access to the open source files for it please let me know.. i need the battery.c and .h since these phones use the same battery
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Apr 9, 2014
I want to ask where does the defaults values of memory min-free values of a Rom reside? I mean what file I would have to edit to edit those values?
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May 13, 2010
The default behavior of an activity when BACK softkey is pressed is, GO BACK TO PREVIOUS ACTIVITY. If some the same activity is waiting for some response from server or some data updation is going on and then press BACK, I want to wait on the same screen till the current task is completely processed and then move out to the previous activity.
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May 11, 2014
I'm using a Note 3 on stock 4.4.2, rooted. tried different battery reading apps (e.g. CurrentWidget) but it always gives me 0mA when charging.
This is unlike my previous S4, where it can give me the precise readings (but of course not as accurate as a real multimeter).
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Dec 3, 2009
I have been searching and just can't find a way to show the amount of current draw/charge on the battery (in milliamp hours). On windows mobile we could see this and in light of the Moment's battery issues it would be a great way to see what is really going on.
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Jul 26, 2010
How do I get the current location of the phone? I'm not talking about registering for location updates on the location manager and waiting for it to update upon change. I'm talking about get the current position.
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Mar 8, 2010
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Jul 16, 2010
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Mar 19, 2010
Is there a way to find the email address of the user of the phone? I have a software that requires password. However, sometimes people forget their password and want a reset. I think the best is to send an email to the user of the phone, instead of prompting the email address at the time the forget their password. Because who knows, it could be one of their friends that picks up the phone and likes to reset the password as a prank.
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Sep 23, 2010
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Nov 17, 2010
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Now i read that question i just posted and someone noted how they could not get it to work in an emulator? unfortunately that is all im working on. On an emulator and cant test the app on the device as i have no device available to me right now And the web services i am interacting with are in a local VM on my work machine that cannot be accesses remotely at the moment.
My question is, is it true that saved bundles dont work on emulators? I also noticed how when i do dismiss or bring up a new activity , the activity calles onPause and then onStop. when i bring back the same activty, it goes straight to onCreate?
now according to the docs here http://developer.android.com/guide/topics/fundamentals.html#actlife That is correct in terms of what the lifecycle diagram shows but if you read below that diagram on the onStop() section it says the next step it goes into is either onRestart() or onDestroy()? no mention of onCreate? Type on the docs?
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May 6, 2010
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Sep 24, 2010
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Sep 10, 2010
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Jul 26, 2010
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May 6, 2010
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Nov 9, 2013
I have a sprint GNex. I just started having this problem recently (but before the 4.3 update). I plug my phone in overnight and at some point in the middle of the night an error occurs that make the phone think it is off the charger and has a fully depleted battery. The battery level icon shows no charge and if I pull the phone off the charger it immediately says it has to shut down due to a low battery. However, as soon as I turn it back on it is back to normal with a full charge.
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Sep 22, 2010
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Mar 13, 2010
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Apr 16, 2010
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Jun 24, 2010
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CODE:.........
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Jul 26, 2010
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