[√]android创建通知栏

 private void showNotify1() {
    Context context = this;
    final int notifyID = 1;
    final String CHANNEL_ID = "channel";
    // 创建一个Intent，指定启动的Activity
    Intent intent = new Intent(context, AppActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    // 创建一个PendingIntent，用于启动应用程序的Activity
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    // 发送通知
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//      NotificationManager notificationManager = (NotificationManager) context.getSystemService(NotificationManager.class);
        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, "default", NotificationManager.IMPORTANCE_HIGH);
        notificationManager.createNotificationChannel(channel);
        // 创建一个Notification，并设置其点击行为为启动Activity
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context, CHANNEL_ID)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setContentTitle("title")
                .setContentText("text")
                .setWhen(System.currentTimeMillis())
                .setContentIntent(pendingIntent)
                .setAutoCancel(false);
        notificationManager.notify(notifyID, builder.build());
    }
}

private void showNotify() {
  String channel = "notify channel";
  final int notifyID = 1;
  String key = "click";
  Context context = this;
  Toast.makeText(context, "test toast", Toast.LENGTH_LONG).show();
  if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
      final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.notify);
      NotificationManager notificationManager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);
      final Notification.Builder builder = new Notification.Builder(context, channel);
      builder.setAutoCancel(true);
      BroadcastReceiver buttonReceiver = new BroadcastReceiver() {
          @Override
          public void onReceive(Context ctx, Intent intent) {
//                    Intent intent1=new Intent(ctx,AppActivity.class);
//                    intent1.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
//                    ctx.startActivity(intent1);
              String name = ctx.getPackageName();
              Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage(name);
              if (launchIntent != null) {
                  launchIntent.addCategory(Intent.CATEGORY_LAUNCHER);
                  launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                  ctx.startActivity(launchIntent);
              }
          }
      };
      IntentFilter intentFilter = new IntentFilter();
      intentFilter.addAction(key);
      context.registerReceiver(buttonReceiver, intentFilter);
      views.setOnClickPendingIntent(R.id.btn, PendingIntent.getBroadcast(context, 0, new Intent(key), 0));
      builder.setOngoing(true)
              .setWhen(System.currentTimeMillis())
              .setSmallIcon(R.mipmap.ic_launcher)
              .setCustomContentView(views);
      @SuppressLint("WrongConstant") NotificationChannel notificationChannel = new NotificationChannel(channel, "Default Channel", NotificationManager.IMPORTANCE_DEFAULT);
      notificationManager.createNotificationChannel(notificationChannel);
      notificationManager.notify(notifyID, builder.build());
  }
}

// 创建一个新的 Intent 对象
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
// 可选：设置数据
intent.setData(Uri.parse("https://www.example.com"));
// 可选：添加附加数据
intent.putExtra("key", "value");
// 启动活动
startActivity(intent);