Android灯光系统--通知灯深入分析
通知的类别
- 声音
- 振动
- 闪灯
APP如何发出通知灯请求
- getSystemService(获得通知服务)
- 构造notification
- 类别
- 其他参数(颜色,onMS,offMS)
- 发出通知
系统如何处理
- 启动通知Service
- 收到通知之后
- 分辨通知类型
- 执行响应操作
- 对于通知灯
- 获得LightService
- 执行灯光相关操作
APP如何获得通知服务
- ContextImp:resigsterService
- 返回一个NotificationManager对象
- 构造Notification
- NotificationManager.notify()将通知发送出去
发送通知之后如何调用通知灯
- Service=getService() //获得某个服务
- 注册有Notification服务
- 根据名字Notification获得Service服务
- Service.enqueueNotificationwithTag //放入通知队列
- 通过enqueueNotificationwithTag中的buzzBeepBlinkLocked判断是否是属于哪种通知类别
- 获得通知属于闪灯,调用updateLightsLocked()
- 取出notification当中的参数,调用mNotificationLights类当中的setFlashing
- 注册LightManager服务
- 根据ID从LightManager中返回获取mNotificationLights类
编写模拟通知灯安卓程序
- 定义按钮,控制20S之后熄屏亮灯
- 定义Flashing boolean型变量,用于控制按钮操作
- 设置按钮响应函数--判断按钮操作,改变按钮text值,并且发出通知
- 构造通知执行方法 - 实现Runnable接口方法
- 获得按钮状态
- 调用开通知灯函数
- 获得通知服务
- 构造通知,设置参数
- 发送通知
- 关闭通知灯函数
- 获得通知服务
- 取消通知灯服务
- 通知
- 延迟20S通知调用postDelayed函数
附上详细代码:
package com.example.alienware.app_0002_lightdemo;
import android.app.Notification;
import android.app.NotificationManager;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
/*
* 模拟熄屏时候,短信等通知发生时候,通知灯亮起
* 设置屏幕背光亮时间为15s,才可以进行下列实验
* Date:2017.2.16 Author:LKQ
* 代码原创者:韦东山老师
*/
public class MainActivity extends AppCompatActivity {
private Button mLightButton = null;
boolean Flashing = false;
final private int LED_NOTIFICATION_ID = 109;
private Handler mLightHandler = new Handler();
private LightRunnable mLightRunnable = new LightRunnable();
//实现消息通知后的执行方法
class LightRunnable implements Runnable{
@Override
public void run() {
if(Flashing){
BlueFlashLight(); //蓝灯闪亮
}
else{
ClearLED(); //关闭通知灯
}
}
}
private void BlueFlashLight()
{
NotificationManager nm = (NotificationManager)getSystemService( NOTIFICATION_SERVICE ); //获取通知服务
Notification notif = new Notification(); //构造通知类型
notif.flags = Notification.FLAG_SHOW_LIGHTS; //设置通知类型为通知灯
notif.ledARGB = 0xFF0000ff; //颜色
notif.ledOnMS = 1000;
notif.ledOffMS = 1000; //闪烁时间为1S
nm.notify(LED_NOTIFICATION_ID, notif); //发送通知
}
private void ClearLED()
{
NotificationManager nm = ( NotificationManager ) getSystemService( NOTIFICATION_SERVICE );
nm.cancel( LED_NOTIFICATION_ID ); //关闭通知灯
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLightButton = (Button)findViewById(R.id.button);
mLightButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Flashing = !Flashing;
if (Flashing) {
mLightButton.setText("Stop Flashing the Light !");
} else {
mLightButton.setText("Flashing Light at 20S");
}
mLightHandler.postDelayed(mLightRunnable, 20000); //20S之后,即是熄屏时候,通知灯闪烁
}
});
}
}
package com.example.alienware.app_0002_lightdemo;
import android.app.Notification;
import android.app.NotificationManager;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
/*
* 模拟熄屏时候,短信等通知发生时候,通知灯亮起
* 设置屏幕背光亮时间为15s,才可以进行下列实验
* Date:2017.2.16 Author:LKQ
* 代码原创者:韦东山老师
*/
public class MainActivity extends AppCompatActivity {
private Button mLightButton = null;
boolean Flashing = false;
final private int LED_NOTIFICATION_ID = 109;
private Handler mLightHandler = new Handler();
private LightRunnable mLightRunnable = new LightRunnable();
//实现消息通知后的执行方法
class LightRunnable implements Runnable{
@Override
public void run() {
if(Flashing){
BlueFlashLight(); //蓝灯闪亮
}
else{
ClearLED(); //关闭通知灯
}
}
}
private void BlueFlashLight()
{
NotificationManager nm = (NotificationManager)getSystemService( NOTIFICATION_SERVICE ); //获取通知服务
Notification notif = new Notification(); //构造通知类型
notif.flags = Notification.FLAG_SHOW_LIGHTS; //设置通知类型为通知灯
notif.ledARGB = 0xFF0000ff; //颜色
notif.ledOnMS = 1000;
notif.ledOffMS = 1000; //闪烁时间为1S
nm.notify(LED_NOTIFICATION_ID, notif); //发送通知
}
private void ClearLED()
{
NotificationManager nm = ( NotificationManager ) getSystemService( NOTIFICATION_SERVICE );
nm.cancel( LED_NOTIFICATION_ID ); //关闭通知灯
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLightButton = (Button)findViewById(R.id.button);
mLightButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// Perform action on click
Flashing = !Flashing;
if (Flashing) {
mLightButton.setText("Stop Flashing the Light !");
} else {
mLightButton.setText("Flashing Light at 20S");
}
mLightHandler.postDelayed(mLightRunnable, 20000); //20S之后,即是熄屏时候,通知灯闪烁
}
});
}
}