I have a battery widget, and for some reason it does not receive the BATTERY_PLIGGED_AC integer when the phone is plugged into AC.
I have another widget for the BATTERY_PLUGGED_USB which works just fine.
I can't see anything wrong with my code:
public void onReceive(Context context, Intent intent) {
status = intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_UNKNOWN);
batterylevel = intent.getIntExtra("level", 0);
updateAppWidget(context);
}
public void updateAppWidget(Context context){
RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.androidbatterywidget_layout);
updateViews.setTextViewText(R.id.textView1, " " + batterylevel + "%");
if (status == BatteryManager.BATTERY_PLUGGED_USB)
updateViews.setImageViewResource(R.id.imageView2, R.drawable.usb);
else if (status == BatteryManager.BATTERY_PLUGGED_AC)
updateViews.setImageViewResource(R.id.imageView2, R.drawable.bolt);
else
updateViews.setImageViewResource(R.id.imageView2, R.drawable.empty);
Hopefully someone will be able to spot what I have done wrong. Thanks!
Figured a way around. Sorry for this post I should have looked at it for a little longer myself. For future reference if people seem to have the same problem, it seems to me that the USB value is bundled with the BatteryManager.BATTERY_STATUS_UNKNOWN, but not the AC. So instead all i did was assign a new private int charging, to the value of the BatteryManager.BATTERY_PLUGGED_AC variable. If this is true (and the device is charging throygh AC), then the value is 1, so I simply replaced my previous if statement with
if (charging == 1)
updateViews.setImageViewResource(R.id.imageView2, R.drawable.bolt);
Now the code reads;
private int batterylevel = 0;
private int status;
private int charging;
private BroadcastReceiver myReceiver = new BroadcastReceiver()
{
public void onReceive(Context context, Intent intent)
{
status = intent.getIntExtra("status", BatteryManager.BATTERY_HEALTH_UNKNOWN);
charging = intent.getIntExtra("plugged", BatteryManager.BATTERY_PLUGGED_AC);
batterylevel = intent.getIntExtra("level", 0);
updateAppWidget(context);
}
public void updateAppWidget(Context context){
RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.androidbatterywidget_layout);
updateViews.setTextViewText(R.id.textView1, " " + batterylevel + "%");
if (charging == 1)
updateViews.setImageViewResource(R.id.imageView2, R.drawable.bolt);
else if (status == BatteryManager.BATTERY_PLUGGED_USB)
updateViews.setImageViewResource(R.id.imageView2, R.drawable.usb);
else
updateViews.setImageViewResource(R.id.imageView2, R.drawable.empty);
Im sure that there is a far more "majestic" way to do this, but i was just puzzled at why the USB int was passed if it was plugged into USB (2), but not the AC (1).
Thanks!
Related
I'm creating a battery monitor application, and I'm trying to display the current battery percentage. I have a broadcastreceiver, that is listening for...
<action android:name="android.intent.action.BATTERY_CHANGED" />
In the receiver I have the following code.
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
currentBatteryLevel = level / (float) scale;
Toast.makeText(context, "Current battery level: " + Float.toString(currentBatteryLevel) + "%", Toast.LENGTH_SHORT).show();
For some reason, the result is always Current battery level: 1.0%...Where am I going wrong?
Edit:
Reciever is registered in the manifest as...
<receiver android:name=".PowerMonitorReceiver">
<intent-filter>
<action android:name="android.intent.action.ACTION_POWER_CONNECTED" />
<action android:name="android.intent.action.ACTION_POWER_DISCONNECTED" />
<action android:name="android.intent.action.BATTERY_LOW" />
<action android:name="android.intent.action.BATTERY_OKAY" />
<action android:name="android.intent.action.BATTERY_CHANGED" />
</intent-filter>
</receiver>
and my receiver is...
package com.garciaericn.t2d;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.BatteryManager;
import android.util.Log;
import android.widget.Toast;
public class PowerMonitorReceiver extends BroadcastReceiver {
private static final String TAG = "PowerMonitorReceiver.TAG";
private float currentBatteryLevel;
#Override
public void onReceive(Context context, Intent intent) {
// Obtain action from intent to check which broadcast is being received
String action = intent.getAction();
// Perform action according to type
switch (action) {
case (Intent.ACTION_BATTERY_CHANGED): {
Log.i(TAG, "Battery has changed");
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
currentBatteryLevel = (level * 100) / (float) scale;
Toast.makeText(context, "Current battery level: " + Float.toString(currentBatteryLevel) + "%" + " level: " + level + " scale: " + scale, Toast.LENGTH_LONG).show();
break;
}
case (Intent.ACTION_POWER_CONNECTED): {
Log.i(TAG, "Power connected");
int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL;
int chargePlug = intent.getIntExtra(BatteryManager.EXTRA_PLUGGED, -1);
boolean usbCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_USB;
boolean acCharge = chargePlug == BatteryManager.BATTERY_PLUGGED_AC;
String chargingType = null;
if (usbCharge) {
chargingType = "USB";
} else if (acCharge) {
chargingType = "AC Power";
}
if (isCharging && chargingType != null) {
Toast.makeText(context, "Device is charging via: " + chargingType, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "Device is charging.", Toast.LENGTH_SHORT).show();
}
break;
}
case (Intent.ACTION_POWER_DISCONNECTED): {
Log.i(TAG, "Power disconnected");
Toast.makeText(context, "Power Disconnected", Toast.LENGTH_SHORT).show();
break;
}
case (Intent.ACTION_BATTERY_LOW): {
Log.i(TAG, "Battery low");
Toast.makeText(context, "Battery low", Toast.LENGTH_SHORT).show();
break;
}
case (Intent.ACTION_BATTERY_OKAY): {
Log.i(TAG, "Battery Okay");
Toast.makeText(context, "Battery Okay", Toast.LENGTH_SHORT).show();
break;
}
}
}
}
I think it's pretty late but the solution is quite simple. According to this link, you will not receive updates for BATTERY_CHANGED if you have registered the broadcast receiver in xml since it's a sticky broadcast.
You need to register Broadcastreceivers in your java program as below.
IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = context.registerReceiver(null, ifilter);
int level = batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
float batteryPct = (level * 100) / (float)scale;
NOTE: Even though you pass "null" as the receiver you can still receive all the required battery data. You can also pass a Receiver class instead of "null" for continuous monitoring but beware this will drain your device battery as these broadcasts are thrown very often.
Since you are listening for multiple broadcasts, you need to determine which type of broadcast it is.
String action = intent.getAction();
if(action.equals(Intent.ACTION_BATTERY_CHANGED)){
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
int percent = (level*100)/scale;
Toast.makeText(context, "Current battery level: " + percent + "%", Toast.LENGTH_SHORT).show();
}
boolean acCharge = false;
IntentFilter ifilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
Intent batteryStatus = registerReceiver(null, ifilter);
int status = batteryStatus.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean isCharging = status == BatteryManager.BATTERY_STATUS_CHARGING ||
status == BatteryManager.BATTERY_STATUS_FULL;
if(isCharging){
chargePercentage =
batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
}
The chargePercentage variable will give you the current charge percentage.
I have register battery low broadcast receiver.
Like this
import com.save.sharedpreference.SharedPreference;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.SmsManager;
import android.widget.Toast;
public class BootReceiver extends BroadcastReceiver {
String user_phone_key = "phone_number";
int last_level = 0;
#Override
public void onReceive(Context context, Intent intent) {
int rlevel = intent.getIntExtra("level", -1);
int scale = intent.getIntExtra("scale", -1);
int level = -1;
if (rlevel >= 0 && scale > 0) {
level = (rlevel * 100) / scale;
}
if (level == 48 && last_level == level + 1) {
SharedPreference save_data = new SharedPreference(
context.getApplicationContext());
String phone = save_data.get_string(user_phone_key, null);
Toast.makeText(context, "Level Decrease", Toast.LENGTH_SHORT)
.show();
try {
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phone, null,
"Your Battery level is less ", null, null);
} catch (Exception e) {
Toast.makeText(context.getApplicationContext(),
"SMS faild, please try again later!", Toast.LENGTH_LONG)
.show();
e.printStackTrace();
}
}
last_level = level + 1;
}
}
Its working fine but the problem is when my battery level is reach 45% it start sending me sms until battery level change from 45%.
I want that when my battery level is reach 45% it just send me sms only one time and again waiting when battery level is 45%.
Is it possible?
Any help please.
Can you just use a local variable, like this?
public class BootReceiver extends BroadcastReceiver {
String user_phone_key = "phone_number";
int last_level = 0;
#Override
public void onReceive(Context context, Intent intent) {
int rlevel = intent.getIntExtra("level", -1);
int scale = intent.getIntExtra("scale", -1);
int level = -1;
if (rlevel >= 0 && scale > 0) {
level = (rlevel * 100) / scale;
}
if (level == 45 && last_level == 46) {
...
last_level = level;
}
}
I know it's not the most elegant solution, but it should work.
The more "official" solution is to use the ACTION_BATTERY_LOW intent to detect charge decreases, which IIRC only fires once, when the device hits low battery. Is there a reason you need to detect the battery level hitting 45%, in particular?
Create a boolean variable to send message only once.Like-
boolean isMsgSent=false;
and modify if loop as-
if(level==45 && !isMsgSent){
// send Msg
isMsgSent=true;
}
else{
isMsgSent=false;
}
It will send message only once when battery level is 45.
I found this code to create a battery widget:
public class BatteryStatusWidgetActivity extends AppWidgetProvider {
/** Called when the activity is first created. */
private String batteryLevel = "init";
private int widgetImageFrame = R.drawable.widget_batt_frame01;
#Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
context.getApplicationContext().registerReceiver(this, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
updateView(context);
}
#Override
public void onReceive(Context context, Intent intent) {
int rawlevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
int level = 65;
level = (rawlevel * 100) / scale;
String batteryLevel = level + "%";
widgetImageFrame = R.drawable.widget_batt_frame01;
updateView(context);
super.onReceive(context, intent);
}
public void updateView(Context context) {
RemoteViews thisViews = new RemoteViews(context.getApplicationContext().getPackageName(), R.layout.widget_layout);
thisViews.setTextViewText(R.id.widget_text, batteryLevel);
thisViews.setImageViewResource(R.id.imageView1, widgetImageFrame);
ComponentName thisWidget = new ComponentName(context, BatteryStatusWidgetActivity.class);
AppWidgetManager.getInstance(context).updateAppWidget(thisWidget, thisViews);
}
This will display in the widget only the number of battery level. I mean "65" and i want display "65%". But if i try to write something like batteryLevel = Integer.toString(level+"%"); i get error.. How can i do it?
int level = 65;
String batteryLevel = level + "%";
Try this it will work
int level= 65;
String batterylevel = String.valueOf(level)+"%";
just replace your code in onReceive() to the following,
#Override
public void onReceive(Context context, Intent intent) {
int rawlevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
int level = -1;
level = (rawlevel * 100) / scale;
batteryLevel = level+"%";
widgetImageFrame = R.drawable.widget_batt_frame01;
updateView(context);
super.onReceive(context, intent);
}
The basic reason you get an error for Integer.toString(level+"%") is Integer.toString() method used here accepts an int value but not a String value. level+"%" is a String value
Change it to this:
int level = -1
level = (rawlevel * 100) / scale;
String batteryLevel = level + "%";
I'm making a widget and i know some of my code such as the broadcastReceiver is wrong at the moment but it wont even update to hardcoded setTextViewText.
My problem is I've no idea why this happens and my widget just wont update.
Here's my code i hope someone can figure out where ive gone wrong:
public class Widget extends AppWidgetProvider {
RemoteViews views;
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
int N = appWidgetIds.length;
views = new RemoteViews(context.getPackageName(), R.layout.widget);
for (int i = 0; i < N; i++) {
int appWidgetId = appWidgetIds[i];
IntentFilter batteryLevelFliter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
context.registerReceiver(batteryChangedReceiver, batteryLevelFliter);
String alarm = Settings.System.getString(context.getContentResolver(),
Settings.System.NEXT_ALARM_FORMATTED);
views.setTextViewText(R.id.tvAlarm, alarm);
views.setTextViewText(R.id.tvNextAlarm, "qwertyuiop");
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
private BroadcastReceiver batteryChangedReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
int rawLevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
int level = -1;
if (rawLevel >= 0 && scale > 0) {
level = (rawLevel * 100) / scale;
}
int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, -1);
boolean charging = status == BatteryManager.BATTERY_STATUS_CHARGING;
if (charging) {
views.setTextViewText(R.id.tvBattery, "Charging: " + level + "%");
if (level == 100) {
views.setTextViewText(R.id.tvBattery, "Battery Full");
}
} else {
views.setTextViewText(R.id.tvBattery, "Battery: " + level + "%");
}
}
};
}
AppWidgetProvider extends android.content.BroadcastReceiver, so you cannot register new BroadcastReceiver to the your AppWidget's context. In your code, you will not receive battery event from your BroadcastReceiver. Refer these previous questions. :)
Android Broadcast Receiver in Widget
Register BroadcastReceiver to Widget (Difference of Context object)
I've been searching for this and only find really messed up things.
Isn't there a easy way to show the battery level like 21% on a toast or Textview?
Or how can i achieve this?
//Simon
To get the battery level right now, call:
registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
(note: typing that in from memory, please adjust if needed)
This will return an Intent with various extras documented on the BatteryManager class. Use BatteryManager.EXTRA_LEVEL and BatteryManager.EXTRA_SCALE to determine the percentage remaining.
If you need to know over a period of time as the battery changes, use the BroadcastReceiver approach #Augusto outlined in his answer.
if you mean changing the battery status on the emulator do the following. Connect to the emulator via telnet and change the status and capacity
> telnet localhost 5554
Android Console: type 'help' for a list of commands
OK
power ac off
OK
power discharging
OK
power capacity 21
OK
exit
>
Ahh, well you can do what it says on the page Ted mentioned, and then use a handler to show a toast. This is the code you need to add to your activity.
private Handler handler = new Handler;
private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver() {
#Override
public void onReceive(final Context context, Intent intent) {
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
Log.i(TAG, "level: " + level + "; scale: " + scale);
int percent = (level*100)/scale;
final String text = String.valueOf(percent) + "%";
handler.post( new Runnable() {
public void run() {
Toast.makeText(context, text, Toast.LENGTH_SHORT).show();
}
});
}
};
public static String batteryLevel(Context context)
{
Intent intent = context.registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
int percent = (level*100)/scale;
return String.valueOf(percent) + "%";
}
You can use this.
private void batteryLevel() {
BroadcastReceiver batteryLevelReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
//context.unregisterReceiver(this);
int rawlevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
int level = -1;
if (rawlevel >= 0 && scale > 0) {
level = (rawlevel * 100) / scale;
}
batterLevel.setText("Battery Level Remaining: " + level + "%");
}
};
IntentFilter batteryLevelFilter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
registerReceiver(batteryLevelReceiver, batteryLevelFilter);
}
I used a combination like that:
BatteryManager bm = (BatteryManager) getActivity().getSystemService(BATTERY_SERVICE);
int batLevel = 100;
int level;
int scale;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
batLevel = bm.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY);
}
if(batLevel == 0){
Intent intent = getActivity().registerReceiver(null, new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
batLevel = (level*100)/scale;
}
I did it like that because on a Nexus 5 device with Marshmallow "batLevel" returned 0 always. That solved it completely!
Good luck