Android realizes the method of dynamic display of battery status display, power and charge _android

This article illustrates the Android implementation of a dynamic display of battery status, power and charge, and is a very common feature in the development of Android applications. Share for everyone to use for reference. The specific methods are as follows:

Use the battery on the Android system to listen and the battery picture of the system is as follows;

The introduction of the two XML files in the source code (which I can't find in the android2.2 jar package), source code path: C:\android-sdk-windows\platforms\android-8\data\res\ drawable), you will find the Stat_sys_battery.xml error, as shown in the following figure:

1. These graphs are introduced into my drawable directory, and then the pictures in Stat_sys_battery.xml are introduced to the path changes as follows:

<level-list xmlns:android= "Http://schemas.android.com/apk/res/android" > 
 <item android:maxlevel= "4" android:drawable= "@drawable/stat_sys_battery_0"/> 
 <item android:maxlevel= "android:drawable=" @ Drawable/stat_sys_battery_10 " 
 android:drawable=" @drawable "/> <item android:maxlevel="/stat_sys_ Battery_20 "/> 
 <item android:maxlevel=" android:drawable= "@drawable/stat_sys_battery_40" 
 /> <item android:maxlevel= "android:drawable=" "@drawable/stat_sys_battery_60"/> 
 <item android: Maxlevel= "android:drawable=" "@drawable/stat_sys_battery_80"/> 
 <item android:maxlevel= "MB" android: drawable= "@drawable/stat_sys_battery_100"/> 
</level-list>

2. Next is the action in the activity:

Create a Intentfilter

Private Intentfilter Mintentfilter; 

In the OnCreate method: add:

Battery related 
mintentfilter = new Intentfilter (); 
Mintentfilter.addaction (intent.action_battery_changed); 

3. Receiving broadcasts

Declares the message handling process private Broadcastreceiver Mintentreceiver = new Broadcastreceiver () {@Override public void onreceive (C 
   Ontext context, Intent Intent) {String action = intent.getaction (); 
   int status = Intent.getintextra ("status", 0); 
   int health = Intent.getintextra ("health", 0); 
   Boolean present = Intent.getbooleanextra ("Present", false); 
   int level = Intent.getintextra ("level", 0); 
   int scale = Intent.getintextra ("scale", 0); 
   int icon_small = Intent.getintextra ("Icon-small", 0); 
   int plugged = Intent.getintextra ("plugged", 0); 
   int voltage = Intent.getintextra ("voltage", 0); 
   int temperature = Intent.getintextra ("Temperature", 0); 
   String technology = Intent.getstringextra ("Technology"); 
   String statusstring = ""; 
    Switch (status) {case BatteryManager.BATTERY_STATUS_UNKNOWN:statusString = "UNKNOWN"; 
   Break 
    Case BatteryManager.BATTERY_STATUS_CHARGING:statusString = "charging"; Battery_image.setimageresource (R.Drawable.stat_sys_battery_charge); 
    Battery_image.getdrawable (). Setlevel (level); 
   Break 
    Case BatteryManager.BATTERY_STATUS_DISCHARGING:statusString = "discharging"; 
    Battery_image.setimageresource (R.drawable.stat_sys_battery); 
    Battery_image.getdrawable (). Setlevel (level); 
   Break 
    Case BatteryManager.BATTERY_STATUS_NOT_CHARGING:statusString = "not charging"; 
   Break 
    Case BatteryManager.BATTERY_STATUS_FULL:statusString = ' full '; 
   Break 
   } String healthstring = ""; 
    Switch (health) {Case BatteryManager.BATTERY_HEALTH_UNKNOWN:healthString = "UNKNOWN"; 
   Break 
    Case BatteryManager.BATTERY_HEALTH_GOOD:healthString = "good"; 
   Break 
    Case BatteryManager.BATTERY_HEALTH_OVERHEAT:healthString = "overheat"; 
   Break 
    Case BatteryManager.BATTERY_HEALTH_DEAD:healthString = "DEAD"; 
   Break 
    Case BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE:healthString = "voltage"; BReak; 
    Case BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE:healthString = "UNSPECIFIED failure"; 
   Break 
   } String acstring = ""; 
    Switch (plugged) {case BatteryManager.BATTERY_PLUGGED_AC:acString = "plugged AC"; 
   Break 
    Case BatteryManager.BATTERY_PLUGGED_USB:acString = "plugged USB"; 
   Break 
   } log.i ("Cat", statusstring); 
   LOG.I ("Cat", healthstring); 
   LOG.I ("Cat", string.valueof (present)); 
   LOG.I ("Cat", String.valueof (level)); 
   LOG.I ("Cat", string.valueof (scale)); 
   LOG.I ("Cat", String.valueof (Icon_small)); 
   LOG.I ("Cat", acstring); 
   LOG.I ("Cat", string.valueof (voltage)); 
   LOG.I ("Cat", string.valueof (temperature)); 
   LOG.I ("Cat", technology); To see if we're going to process the message if (Action.equals (intent.action_battery_changed)) {//battery charge, Digital log.d ("BATTERY", "" + inte     
    Nt.getintextra ("level", 0));     
    Maximum battery capacity log.d ("Battery", "" + Intent.getintextra ("scale", 0)); Battery Count Log.d ("Battery "," "+ Intent.getintextra (" voltage ", 0)); 
    Battery temperature Log.d ("Battery", "" + Intent.getintextra ("Temperature", 0)); Battery state, the return is a number//batterymanager.battery_status_charging representation is charged state//batterymanager.battery_status_discharging discharge Medium//Batterymanager.battery_status_not_charging not charged//Batterymanager.battery_status_full battery full Log.d ("Batter 
    Y "," ss "+ Intent.getintextra (" status ", batterymanager.battery_status_charging)); Charging type Batterymanager.battery_plugged_ac is the charger, not this value, which means USB log.d ("BATTERY", "" + Intent.getintextra ("plugged", 0)) 
    ; Battery health condition, return is also a digital//batterymanager.battery_health_good good//batterymanager.battery_health_overheat overheating//Bat Terymanager.battery_health_dead not//batterymanager.battery_health_over_voltage over voltage//BatteryManager.BATTERY_HEA Lth_unspecified_failure Unknown error log.d ("Battery", "" + Intent.getintextra ("Health", Batterymanager.battery_health_unknow 
   N)); 

 } 
  } 
 };

Here the real processing picture transforms is the following words:

Switch (status) {case 
batterymanager.battery_status_unknown: 
 statusstring = "UNKNOWN"; 
 break; 
Case batterymanager.battery_status_charging: 
 statusstring = "charging"; 
 Battery_image.setimageresource (r.drawable.stat_sys_battery_charge); 
 Battery_image.getdrawable (). Setlevel (level); 
 break; 
Case batterymanager.battery_status_discharging: 
 statusstring = "discharging"; 
 Battery_image.setimageresource (r.drawable.stat_sys_battery); 
 Battery_image.getdrawable (). Setlevel (level); 
 break; 
Case batterymanager.battery_status_not_charging: 
 statusstring = "not charging"; 
 break; 
Case Batterymanager.battery_status_full: 
 statusstring = "full"; 
 break; 

4. Registering the Message processor in the Onresume method

Registerreceiver (Mintentreceiver, Mintentfilter); 

5. Log off in the OnPause method

Unregisterreceiver (Mintentreceiver);

I hope this article will help you with your Android program.