Android Notification通知

先上效果：

**

1、权限

**
1.1、判断是否拥有权限

NotificationManagerCompat.from(this).areNotificationsEnabled();

	没错只要这一行代码，若果拥有权限则打印日志返回true

1.2、用户手动打开权限

 Intent localIntent = new Intent();
                            //直接跳转到应用通知设置的代码：
                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//8.0及以上
                                localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                                localIntent.setData(Uri.fromParts("package", getPackageName(), null));
                            } else if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {//5.0以上到8.0以下
                                localIntent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
                                localIntent.putExtra("app_package", getPackageName());
                                localIntent.putExtra("app_uid", getApplicationInfo().uid);
                            } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {//4.4
                                localIntent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                                localIntent.addCategory(Intent.CATEGORY_DEFAULT);
                                localIntent.setData(Uri.parse("package:" + getPackageName()));
                            } else {
                                //4.4以下没有从app跳转到应用通知设置页面的Action，可考虑跳转到应用详情页面,
                                localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                if (Build.VERSION.SDK_INT >= 9) {
                                    localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                                    localIntent.setData(Uri.fromParts("package", getPackageName(), null));
                                } else if (Build.VERSION.SDK_INT <= 8) {
                                    localIntent.setAction(Intent.ACTION_VIEW);
                                    localIntent.setClassName("com.android.settings", "com.android.setting.InstalledAppDetails");
                                    localIntent.putExtra("com.android.settings.ApplicationPkgName", getPackageName());
                                }
                            }
                            startActivity(localIntent);

目前我所知道的只能跳转到这里了，有更好的欢迎指点

1.3、完整代码

 if (!NotificationManagerCompat.from(this).areNotificationsEnabled()) {
            //未打开通知
            AlertDialog alertDialog = new AlertDialog.Builder(this)
                    .setTitle("提示")
                    .setMessage("请在“通知”中打开通知权限")
                    .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();
                        }
                    })
                    .setPositiveButton("去设置", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            dialog.cancel();

                            Intent localIntent = new Intent();
                            //直接跳转到应用通知设置的代码：
                            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//8.0及以上
                                localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                                localIntent.setData(Uri.fromParts("package", getPackageName(), null));
                            } else if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {//5.0以上到8.0以下
                                localIntent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
                                localIntent.putExtra("app_package", getPackageName());
                                localIntent.putExtra("app_uid", getApplicationInfo().uid);
                            } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {//4.4
                                localIntent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                                localIntent.addCategory(Intent.CATEGORY_DEFAULT);
                                localIntent.setData(Uri.parse("package:" + getPackageName()));
                            } else {
                                //4.4以下没有从app跳转到应用通知设置页面的Action，可考虑跳转到应用详情页面,
                                localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                                if (Build.VERSION.SDK_INT >= 9) {
                                    localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                                    localIntent.setData(Uri.fromParts("package", getPackageName(), null));
                                } else if (Build.VERSION.SDK_INT <= 8) {
                                    localIntent.setAction(Intent.ACTION_VIEW);
                                    localIntent.setClassName("com.android.settings", "com.android.setting.InstalledAppDetails");
                                    localIntent.putExtra("com.android.settings.ApplicationPkgName", getPackageName());
                                }
                            }
                            startActivity(localIntent);

                        }
                    })
                    .create();
            alertDialog.show();
            alertDialog.getButton(DialogInterface.BUTTON_NEGATIVE).setTextColor(Color.BLACK);
            alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(Color.RED);
        }

2、通知与订阅

效果图在最开始，直接上实现代码

2.1、通知

NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        Notification notification = new NotificationCompat.Builder(this, "chat")
                .setContentTitle("收到一条聊天消息")
                .setContentText("今天中午吃什么？")
                .setWhen(System.currentTimeMillis())
                .setSmallIcon(R.drawable.ic_launcher_background)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))
                .setAutoCancel(true)
                .build();
        manager.notify(1, notification);

2.2、订阅

NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        Notification notification = new NotificationCompat.Builder(this, "subscribe")
                .setContentTitle("收到一条订阅消息")
                .setContentText("地铁沿线30万商铺抢购中！")
                .setWhen(System.currentTimeMillis())
                .setSmallIcon(R.drawable.ic_launcher_background)
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))
                .setAutoCancel(true)
                .build();
        manager.notify(2, notification);

参考地址：
通知与订阅：https://blog.csdn.net/guolin_blog/article/details/79854070
权限：https://blog.csdn.net/aiynmimi/article/details/102740139?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param

本文地址：https://blog.csdn.net/weixin_44259937/article/details/107952559