参考博客：https://blog.csdn.net/qi85481455/article/details/82895507
基本案例：
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");
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
}参考郭神博客：https://blog.csdn.net/guolin_blog/article/details/79854070
android 8.0 系统通知问题：通知不能分类，如果关闭通知栏开关以后，那么所有的通知都不能收到
android 8.0引入到了通知渠道概念,通知分组
比如把 有聊天 消息、订阅消息，把 聊天消息放入放入一个通知渠道 ,设置高优先级，
那么这个时候可以关闭订阅消息通知，
还可以在通知栏中右滑，设置 再次显示通知时间， 通知通知开关对这个类别
基本案例：
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";
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);
}
}
问题： 如果用户关闭聊天通知开关，那么用户无法使用通知，动态判断通知栏
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";
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){
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();
}
}
}
}
作者：小置同学
