今日小结 5.2

mac2022-06-30  20

服务 Service  OK广播 Broadcast   OK

 

1. 一些Bug 记录

(1)记得在Manifest中添加 服务,否则 编译不报错,服务却没有执行

<service android:name=".BLEService"/>

(2)

myViewHolder = new MyViewHolder();Log.d(TAG, "getView: 完成了new MyViewHolder"); //一定要指定是 converView下的findViewById方法,不然如果直接写findViewId就是调用父类Activity中的此方法,会出错!myViewHolder.tv_deviceAddress = (TextView) convertView.findViewById(R.id.tv_device_address);myViewHolder.tv_deviceName = (TextView) convertView.findViewById(R.id.tv_device_name);convertView.setTag(myViewHolder); //记住这个视图Log.d(TAG, "getView: 完成了setTag(myViewHolder)");

 

2.广播的用法 Broadcast

(1) Intent

(2)IntentFilter

(3)注册广播 (指定广播接收器(ReceiverUtil),Intent过滤器IntentFiler) 这样就不用在Manifest中定义了

(4)发送广播 sendBroadcast

(5)去广播接收器(ReceiverUtil类中指定接收的ACTION,定义接收后的操作)

 

3.服务的用法 Service

 

4.定义ACTION_ 全局常量要用 全名!!!

//定义ACTION_ 全局常量要用 全名!!! public final static String ACTION_GATT_CONNECTED = "com.example.bluetooth.le.ACTION_GATT_CONNECTED"; public final static String ACTION_GATT_DISCONNECTED = "com.example.bluetooth.le.ACTION_GATT_DISCONNECTED"; public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED"; public final static String ACTION_DATA_AVAILABLE = "com.example.bluetooth.le.ACTION_DATA_AVAILABLE"; public final static String EXTRA_DATA = "com.example.bluetooth.le.EXTRA_DATA";

 

转载于:https://www.cnblogs.com/Chongger/p/5452726.html

相关资源:Angular(5.2->6.1)升级小结
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