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我正在尝试使用 BroadCastReceiver 获得击球手水平:

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 0);

我在 AndroidManifest.xml 中添加了以下权限:

<uses-permission android:name="android.permission.BATTERY_STATS" />

当我打印级别和比例时,我看到默认值 0。是否有其他设置?

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2 回答 2

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以百分比计算电池电量:

您可以通过从电池状态意图中提取当前电池电量和比例来查找当前电池电量,如下所示:

int level = battery.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
int scale = battery.getIntExtra(BatteryManager.EXTRA_SCALE, -1);

float batteryPct = level / (float)scale;

像这样实现广播接收器:

 BroadcastReceiver mybatteryReceiver= new BroadcastReceiver() {
            public void onReceive(Context context, Intent intent) {
                int rawlevel = intent.getIntExtra("level", -1);
                int scale = intent.getIntExtra("scale", -1);
                int level = -1;
                if (rawlevel >= 0 && scale > 0) {
                    level = (rawlevel * 100) / scale;
                }
                Log.d("TEMP","Battery Level in % is:: " + level + "%");
            }
        };

从这里获取代码它已经过试验和测试。工作正常。

https://www.dropbox.com/s/1y6q5wu526ngz7t/BatteryStats.zip

代码结果: 在此处输入图像描述

于 2012-10-02T00:28:14.483 回答
0

获取电池充电状态无需许可,只需在广播接收器中使用以下代码:-

int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);

这将导致电池电量:)

于 2014-07-27T11:50:51.950 回答