java - Toast 消息不显示？

Question

我正在尝试为应用程序提供蓝牙连接，当蓝牙打开时，它不会显示 toast 消息

if (!bluetoothAdapter.isEnabled()) {

                    Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

                    startActivityForResult(intent, 1);
                    Toast.makeText(HeartRate.this, "Turned on", Toast.LENGTH_LONG);
                }

Answer 1

你忘记了什么

 if (!bluetoothAdapter.isEnabled()) {

                Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);

                startActivityForResult(intent, 1);
//.show happens a lot of times to me
                Toast.makeText(HeartRate.this, "Turned on", Toast.LENGTH_LONG).show();
            }