android8显示广播,Android 8.1版本广播发送问题

今天在写通知栏自定义RemoteView事件时，用了广播处理点击事件，发送一个广播，接收时收不到，出现了这个log

我的写法：使用的隐式方式发送广播。

查资料后发现，Android O版本对后台进程做了限制广播的发送，对隐式广播也做了限制；

优先使用动态注册Receiver的方式，能动态注册绝不使用Manifest注册

IntentFilter intentFilter = new IntentFilter();

intentFilter.addAction("com.test.zzk.notificationtest");

MusicReceiver receiver = new MusicReceiver();

registerReceiver(receiver, intentFilter);

如果非要用Manifest注册，可以有以下三种方法实现，

Intent intent = new Intent();

方法1：

intent.setAction("com.broadcast.test.action");

intent.setPackage("com.broadcast.test.demo");

方法2：

intent.setClassName("com.broadcast.test.demo", "com.broadcast.test.demo.MyReceiver");

方法3：

intent.setComponent(new ComponentName("com.broadcast.test.demo", "com.broadcast.test.demo.MyReceiver"));

getApplicationContext().sendBroadcast(intent);

如果要接收系统广播，其对应的广播在Android8.0中无法被接收，可以把App的targetSdkVersion改为25或以下。

现在就可以接收到了，如下点击关闭弹出一个Toast

广播代码

public class MusicReceiver extends BroadcastReceiver {

@Override

public void onReceive(Context context, Intent intent) {

String action=intent.getAction();

if (action != null && action.equals("close")) {

if(MainActivity.myHandler!=null){

MainActivity.myHandler.sendEmptyMessage(MainActivity.MESSAGE_CLOSE);

}

}

}

}

对应Handler代码

public static class MyHandler extends Handler{

private final WeakReferencemActivity;

private NotificationManager mNotificationManager;

private Intent mIntent;

@RequiresApi(api = Build.VERSION_CODES.O)

private MyHandler(Activity activity){

mActivity=new WeakReference<>(activity);

init(activity);

}

@RequiresApi(api = Build.VERSION_CODES.O)

private void init(Activity activity) {

mNotificationManager = (NotificationManager) activity.getSystemService(NOTIFICATION_SERVICE);

NotificationChannel channel = new NotificationChannel(CHANNEL_ID,"my_channel",NotificationManager.IMPORTANCE_DEFAULT);

channel.enableLights(true); //是否在桌面icon右上角展示小红点

channel.setLightColor(Color.GREEN); //小红点颜色

channel.setShowBadge(true); //是否在久按桌面图标时显示此渠道的通知

mNotificationManager.createNotificationChannel(channel);//创建Channel

mIntent=new Intent();

mIntent.setClass(activity,SecondActivity.class);

}

@TargetApi(Build.VERSION_CODES.O)

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)

@Override

public void handleMessage(Message msg) {

Activity activity=mActivity.get();

if(activity==null){

throw new NullPointerException("activity 为空");

}else if(msg.what==MESSAGE_ADD){

Notification.Builder builder=new Notification.Builder(activity);

PendingIntent intent=PendingIntent.getActivity(activity,0,mIntent,0);

builder.setContentTitle("测试 "+mNotificationId) //必须提供

.setContentText("测试内容") //必须提供

.setTicker("测试通知到达")

.setWhen(System.currentTimeMillis())

.setPriority(Notification.PRIORITY_DEFAULT)//设置该通知优先级

.setSmallIcon(R.mipmap.ic_launcher_round) //必须提供

.setOngoing(true) // 设置常驻用户无法清除

.setContentIntent(intent) //用于点击通知跳转界面

.setChannelId(CHANNEL_ID); //Android O以上版本必须提供

mNotificationManager.notify(mNotificationId++, builder.build());

}else if(msg.what==MESSAGE_CLEAR){

mNotificationManager.cancelAll();

}else if(msg.what==MESSAGE_DELETE_BY_ID){

if(mNotificationId>0){

mNotificationManager.cancel(mNotificationId-1);

mNotificationId--;

}else{

Toast.makeText(activity, "已经没有通知需要清除了", Toast.LENGTH_SHORT).show();

}

}else if(msg.what==MESSAGE_ADD_SP){

Notification.Builder builder=new Notification.Builder(activity);

Intent in=new Intent("close");

in.setPackage(activity.getPackageName());

PendingIntent intent=PendingIntent.getBroadcast(activity,0

,in,PendingIntent.FLAG_UPDATE_CURRENT);

MyNotificationView myNotificationView=new MyNotificationView(activity.getPackageName()

,R.layout.notification_item

,activity);

myNotificationView.setOnClickPendingIntent(R.id.btn_item_close,intent);

builder.setSmallIcon(R.mipmap.ic_launcher)

.setOngoing(false)

.setAutoCancel(true)

.setCustomContentView(myNotificationView)

.setChannelId(CHANNEL_ID)

.setWhen(SystemClock.currentThreadTimeMillis())

.setContentIntent(intent);

mNotificationManager.notify(mNotificationId++, builder.build());

}else if(msg.what==MESSAGE_CLOSE){

Toast.makeText(activity,"关闭成功",Toast.LENGTH_SHORT).show();

}

super.handleMessage(msg);

}

}

项目地址：https://github.com/1104219446/NitificationTest.git

标签：8.1,mNotificationManager,广播,intent,activity,msg,new,Android,com

来源： https://blog.youkuaiyun.com/Swust_Zeng_zhuo_K/article/details/96474461