Prior notification Notification.Builder 1. android 8.0,
Reference blog: https: //blog.csdn.net/qi85481455/article/details/82895507
Base case:
public void sendNotification(View view){
// 设置点击通知启动 意图
// Intent intent = new Intent(this,MainActivity.class);
Intent intent = new Intent(); // 通过通知意图启动拨打电话界面
intent.setAction(Intent.ACTION_DIAL);
intent.setData(Uri.parse("tel:"+110));
PendingIntent pi = PendingIntent.getActivity(MainActivity.this,0,intent,0);
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification.Builder builder=new Notification.Builder(this);
builder.setContentTitle("小标题");
builder.setContentText("通知内容");
builder.setSmallIcon(R.mipmap.ic_launcher); // 小图标
builder.setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher)); // 大图标
builder.setWhen(System.currentTimeMillis()); //设置时间
builder.setAutoCancel(true); // 点击启动Activity以后自动取消
builder.setContentIntent(pi);
Notification nf=builder.build();
nf.flags= Notification.FLAG_INSISTENT; // 设置以后通知栏不能被取消，不起作用？？？？
manager.notify(1,nf); // 1 是通知id 可以根据1 取消通知
}2. andorid 8.0 after notification
Reference Guo God blog: https://blog.csdn.net/guolin_blog/article/details/79854070
android 8.0 system notification problem : Notification can not be classified in the future if you turn off the notification bar switch, then all notifications are not received
android 8.0 introduced the concept of channels to inform, notify grouping
such as to have a chat message, the subscription message, put the message into the chat into a notification channel, set a high priority,
then this can be turned off when the message notification subscription,
you can also slide the notification bar on the right, set up a notification time again, switch notifications on this category
Base case:
package com.notificationdemo.denganzhi;
import android.annotation.TargetApi;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.opengl.Visibility;
import android.os.Build;
import android.provider.Settings;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
String channelId1 = "chat";
String channelId2 = "subscribe";
// 1. 创建通知渠道
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String channelName = "聊天消息";
/***
* 通知等级：
* NotificationManager.IMPORTANCE_HIGH;
* IMPORTANCE_DEFAULT
* IMPORTANCE_LOW
* IMPORTANCE_MIN
*/
int importance = NotificationManager.IMPORTANCE_HIGH;
createNotificationChannel(channelId1, channelName, importance);
channelName = "订阅消息";
importance = NotificationManager.IMPORTANCE_LOW;
createNotificationChannel(channelId2, channelName, importance);
}
}
@TargetApi(Build.VERSION_CODES.O)
private void createNotificationChannel(String channelId, String channelName, int importance) {
NotificationChannel channel = new NotificationChannel(channelId, channelName, importance);
channel.setShowBadge(true); // 允许显示角标
NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(channel);
}
// 2. 发送 聊挺通知 ，使用 channelId1 聊天渠道
public void sendNotifiction1(View view){
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new NotificationCompat.Builder(this, channelId1)
.setContentTitle("收到一条聊天消息")
.setContentText("今天中午吃什么？")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
.setAutoCancel(true)
.setNumber(1000) // 未读消息
.build();
manager.notify(1, notification);
}
// 3. 发送 订阅通知，使用通知渠道 channelId2
public void sendNotifiction2(View view){
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
Notification notification = new NotificationCompat.Builder(this, channelId2)
.setContentTitle("发送一条订阅消息")
.setContentText("地铁10号线商铺抢购中!!!!")
.setWhen(System.currentTimeMillis())
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
.setAutoCancel(true)
.build();
manager.notify(2, notification);
}
}
Problem: If the user closes the chat notification switch, the user can not use the notification, dynamic determination notification bar
package com.notificationdemo.denganzhi;
import android.annotation.TargetApi;
import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.content.Intent;
import android.graphics.BitmapFactory;
import android.opengl.Visibility;
import android.os.Build;
import android.provider.Settings;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
String channelId1 = "chat";
// 1. 创建通知渠道
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
String channelName = "聊天消息";
/***
* 通知等级：
* NotificationManager.IMPORTANCE_HIGH;
* IMPORTANCE_DEFAULT
* IMPORTANCE_LOW
* IMPORTANCE_MIN
*/
int importance = NotificationManager.IMPORTANCE_HIGH;
// 只会调用一次，系统有优化
createNotificationChannel(channelId1, channelName, importance)
}
}
@TargetApi(Build.VERSION_CODES.O)
private void createNotificationChannel(String channelId, String channelName, int importance) {
NotificationChannel channel = new NotificationChannel(channelId, channelName, importance);
channel.setShowBadge(true); // 允许显示角标
NotificationManager notificationManager = (NotificationManager) getSystemService(
NOTIFICATION_SERVICE);
notificationManager.createNotificationChannel(channel);
}
public void sendNotifiction3(View view){
/**
* 如果 channelId1 通知渠道开关关闭，
* 比如聊天 功能无法使用
* 可以通过 Api判断 改通知去掉 开关状态，
* 如果用户关闭，那么手动去打开
*/
NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel channel = manager.getNotificationChannel(channelId1);
// 获取通知 渠道配置 IMPORTANCE_NONE 表示 关闭通知渠道了
if (channel.getImportance() == NotificationManager.IMPORTANCE_NONE) {
Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS);
intent.putExtra(Settings.EXTRA_APP_PACKAGE, getPackageName());
intent.putExtra(Settings.EXTRA_CHANNEL_ID, channel.getId());
startActivity(intent);
Toast.makeText(this, "请手动将通知打开", Toast.LENGTH_SHORT).show();
}
}
}
}
