最近项目中遇到一个需求，实时监测手机是否接通电源，大概效果如下：

如果拔掉充电器上图中的对号就不显示

怎么实现呢，第一想到的就是使用广播来进行监听，代码如下：

/**
 * 充电检测
 */
public class BatteryListener{
        private Context mContext;

        private BatteryBroadcastReceiver receiver;

        private BatteryStateListener mBatteryStateListener;

        public BatteryListener(Context context) {
            mContext = context;
            receiver = new BatteryBroadcastReceiver();
        }

        public void register(BatteryStateListener listener) {
            mBatteryStateListener = listener;
            if (receiver != null) {
                IntentFilter filter = new IntentFilter();
                filter.addAction(Intent.ACTION_BATTERY_CHANGED);
                filter.addAction(Intent.ACTION_BATTERY_LOW);
                filter.addAction(Intent.ACTION_BATTERY_OKAY);
                filter.addAction(Intent.ACTION_POWER_CONNECTED);
                filter.addAction(Intent.ACTION_POWER_DISCONNECTED);
                mContext.registerReceiver(receiver, filter);
            }
        }

        public void unregister() {
            if (receiver != null) {
                mContext.unregisterReceiver(receiver);
            }
        }

private class BatteryBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent != null) {
            String acyion = intent.getAction();
            switch (acyion) {
                case Intent.ACTION_BATTERY_CHANGED://电量发生改变
                    if (mBatteryStateListener != null) {
                      //  Log.e("zhang", "BatteryBroadcastReceiver --> onReceive--> ACTION_BATTERY_CHANGED");
                        mBatteryStateListener.onStateChanged();
                    }
                    break;
                case Intent.ACTION_BATTERY_LOW://电量低
                    if (mBatteryStateListener != null) {
                      //  Log.e("zhang", "BatteryBroadcastReceiver --> onReceive--> ACTION_BATTERY_LOW");
                        mBatteryStateListener.onStateLow();
                    }
                    break;
                case Intent.ACTION_BATTERY_OKAY://电量充满
                    if (mBatteryStateListener != null) {
                      //  Log.e("zhang", "BatteryBroadcastReceiver --> onReceive--> ACTION_BATTERY_OKAY");
                        mBatteryStateListener.onStateOkay();
                    }
                    break;
                case Intent.ACTION_POWER_CONNECTED://接通电源
                    if (mBatteryStateListener != null) {
                      //  Log.e("zhang", "BatteryBroadcastReceiver --> onReceive--> ACTION_POWER_CONNECTED");
                        mBatteryStateListener.onStatePowerConnected();
                    }
                    break;
                case Intent.ACTION_POWER_DISCONNECTED://拔出电源
                    if (mBatteryStateListener != null) {
                      //  Log.e("zhang", "BatteryBroadcastReceiver --> onReceive--> ACTION_POWER_DISCONNECTED");
                        mBatteryStateListener.onStatePowerDisconnected();
                    }
                    break;
            }
        }
    }
}

public interface BatteryStateListener {
    public void onStateChanged();

    public void onStateLow();

    public void onStateOkay();

    public void onStatePowerConnected();

    public void onStatePowerDisconnected();
}

}

   /**
    * 使用
    */
    
   BatteryListener listener = new BatteryListener(this);
        listener.register(new BatteryListener.BatteryStateListener() {
            @Override
            public void onStateChanged() { //电量发生改变
            }

            @Override
            public void onStateLow() { //电量低

            }

            @Override
            public void onStateOkay() { //电量充满

            }

            @Override
            public void onStatePowerConnected() { //接通电源
                charge_true.setVisibility(View.VISIBLE);
            }

            @Override
            public void onStatePowerDisconnected() { //拔出电源
                charge_true.setVisibility(View.GONE);
            }
        });

以上就是全部的实现，特此写一篇帖子记录，方便以后使用，希望可以给遇到同样需求的同学带来帮助。

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