我的Broadcastreceiver似乎检测到呼叫结束，但仍然没有做它应该做的事情。有人看到我代码中的缺陷了吗？

<receiver android:name=".MyBroadcastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.PHONE_STATE" />
    </intent-filter>
</receiver>

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

public class MyBroadcastReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) {
            String phoneState = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
            if (phoneState.equals(TelephonyManager.EXTRA_STATE_IDLE)) {
                // 执行呼叫结束后的操作
                // ...
            }
        }
    }
}

Log.d("MyBroadcastReceiver", "Received broadcast: " + intent.getAction());