写一个可以控制手机发射红外线遥控空调的android app

由于涉及到硬件操作，需要通过外部模块来实现控制。

以下是参考代码：

1. 添加权限信息

<uses-permission android:name="android.permission.TRANSMIT_IR" />

2. 编写控制代码

private ConsumerIrManager mConsumerIrManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mConsumerIrManager = (ConsumerIrManager) getSystemService(CONSUMER_IR_SERVICE);

    Button powerOnButton = findViewById(R.id.power_on_button);
    powerOnButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int[] pattern = {3500, 1750, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 9000};
            mConsumerIrManager.transmit(38000, pattern);
        }
    });

    Button powerOffButton = findViewById(R.id.power_off_button);
    powerOffButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int[] pattern = {3500, 1750, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 450, 9000};
            mConsumerIrManager.transmit(38000, pattern);
        }
    });
}

3. 控制指令解释

红外线遥控空调的指令通常是由前导码和数据码组成，前导码是一个长时间的脉冲或闪烁信号，用于告知空调接下来的指令数据信息的长度和格式。数据码通常是一个二进制编码，用于表达空调的不同操作状态。

控制指令需要结合具体的空调品牌和型号来设计，可以通过在线提供的空调红外码库来获取。

参考链接：

- [探秘红外线遥控](https://developer.android.com/reference/android/hardware/ConsumerIrManager)
- [红外遥控器与使用](https://developer.android.com/guide/topics/connectivity/irda)
- [NEC红外遥控器编码](https://www.sbprojects.net/knowledge/ir/nec.php)