今天想使用android系统的电池侦听和系统的电池图片；
引入源代码中的两个xml文件（这里我在android2.2的jar包中找不到，所以才引入，源代码路径：C:\android-sdk-windows\platforms\android-8\data\res\drawable），之后会发现stat_sys_battery.xml报错，所以我就将下图
这些图引入到我的drawable目录下，然后将stat_sys_battery.xml中的图片引入路径更改，如下：
<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="14" android:drawable="@drawable/stat_sys_battery_10" />
<item android:maxLevel="29" android:drawable="@drawable/stat_sys_battery_20" />
<item android:maxLevel="49" android:drawable="@drawable/stat_sys_battery_40" />
<item android:maxLevel="69" android:drawable="@drawable/stat_sys_battery_60" />
<item android:maxLevel="89" android:drawable="@drawable/stat_sys_battery_80" />
<item android:maxLevel="100" android:drawable="@drawable/stat_sys_battery_100" />
</level-list>
接下来是在activity中的操作：
创建一个IntentFilter
private IntentFilter mIntentFilter;
在oncreate的方法中：加入：
//电池相关
mIntentFilter = new IntentFilter();
mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
//声明消息处理过程
private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context 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);
//要看看是不是我们要处理的消息
if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
//电池电量，数字
Log.d("Battery", "" + intent.getIntExtra("level", 0));
//电池最大容量
Log.d("Battery", "" + intent.getIntExtra("scale", 0));
//电池伏数
Log.d("Battery", "" + intent.getIntExtra("voltage", 0));
//电池温度
Log.d("Battery", "" + intent.getIntExtra("temperature", 0));
//电池状态，返回是一个数字
// BatteryManager.BATTERY_STATUS_CHARGING 表示是充电状态
// BatteryManager.BATTERY_STATUS_DISCHARGING 放电中
// BatteryManager.BATTERY_STATUS_NOT_CHARGING 未充电
// BatteryManager.BATTERY_STATUS_FULL 电池满
Log.d("Battery", "ss" + intent.getIntExtra("status", BatteryManager.BATTERY_STATUS_CHARGING));
//充电类型 BatteryManager.BATTERY_PLUGGED_AC 表示是充电器，不是这个值，表示是 USB
Log.d("Battery", "" + intent.getIntExtra("plugged", 0));
//电池健康情况，返回也是一个数字
//BatteryManager.BATTERY_HEALTH_GOOD 良好
//BatteryManager.BATTERY_HEALTH_OVERHEAT 过热
//BatteryManager.BATTERY_HEALTH_DEAD 没电
//BatteryManager.BATTERY_HEALTH_OVER_VOLTAGE 过电压
//BatteryManager.BATTERY_HEALTH_UNSPECIFIED_FAILURE 未知错误
Log.d("Battery", "" + intent.getIntExtra("health", BatteryManager.BATTERY_HEALTH_UNKNOWN));
}
}
};
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这里真正处理图片变换的是以下几句话：其他的我是在做备注
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;
}
在onResume方法中注册消息处理器
registerReceiver(mIntentReceiver, mIntentFilter);
在onPause方法中注销
unregisterReceiver(mIntentReceiver);