红外发射器和Android 5.0 [英] IR emitter and Android 5.0

问题描述

我现在面临一个问题，在我的银河S5的红外发射器的Andr​​oid 5.0下运行。

I am facing a problem with the IR emitter on my Galaxy S5 running under Android 5.0.

在我更新到5.0，我的应用程序是完美的工作在我的手机，但现在，该设备我想管理没有反应。当我点击我的应用程序发送一个IR code时，指示灯闪烁，表明IR经理被激活，我可以用红外光电二极管连接到我的范围内接收信号。不幸的是，我得到的信号的形状是从它应该是什么很大的不同。

Before I updated it to 5.0, my app was perfectly working on my phone but now, the device I am suppose to manage has no reaction. When I click on my app to send an IR code, the led blinks to indicate that the IR manager is activated and I can receive a signal with a IR photodiode connected to my scope. Unfortunately, the shape of the signal I get is very different from what it should be.

我可以补充一点，在Android 4.4.2下我的平板电脑上运行相同的code依然完美。

I can add that the same code running on my tablet under Android 4.4.2 still works perfectly.

要帮助回答我的问题，我的code的例子：

To help in answering my question, a sample of my code :

private String commande="0000 0070 0000 0032 0080 003F 0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 "
+ "0010 0010 0010 0010 0010 0010 0010 0010 0010 0030 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 "
+ "0030 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 "
+ "0010 0010 0010 0010 0010 0010 0010 0030 0010 0030 0010 0030 0010 0030 0010 0030 0010 0010 0010 0030 0010 0A98";

IRManager=(ConsumerIrManager)activité.getSystemService(Context.CONSUMER_IR_SERVICE);
code=commandConversion(commande);
IRManager.transmit(code.getFrequency(),code.getCodes());

private RemoteCommandeCode commandConversion(String command) {
    List<String> list;
    RemoteCommandeCode code;
    int frequency;

    list= new ArrayList<String>(Arrays.asList(command.split(" ")));

    list.remove(0); // dummy

    frequency = Integer.parseInt(liste.remove(0), 16); // frequency

    list.remove(0); // seq1

    list.remove(0); // seq2

    code=new RemoteCommandeCode(list.size());

    for (int i = 0; i < list.size(); i++) {
        code.setCode(i,Integer.parseInt(list.get(i), 16));
    }

    frequency = (int) (1000000 / (frequency * 0.241246));

    code.setFrequency(frequency);

    return(code);
}

public class RemoteCommandeCode {
    private int fréquence;
    private int [] codes;

    public RemoteCommandeCode(int nombreCodes){
        codes=new int[nombreCodes];
    }

    public int getFrequency() {
        return frequency;
    }

    public void setFrequency(int frequency) {
        this.frequency = frequency;
    }

    public int [] getCodes() {
        return codes;
    }

    public void setCodes(int [] codes) {
        this.codes = codes;
    }

    public void setCode(int i,int code){
        codes[i]=code;
    }
}

至于问，用简单的code0000 0070 0000 0003 0010 0020 0010 0020 0010 0020，我得到4.4.2发射的信号的图像：

As asked, images of the signal emitted with the simple code "0000 0070 0000 0003 0010 0020 0010 0020 0010 0020", I get on 4.4.2 :

和在Android 5.0：

and on Android 5.0 :

推荐答案

此方法将解决所有的Andr​​oid版本的IR问题

This method will fix the IR problems for all Android versions

/*
 * preforms some calculations on the codesets we have in order to make them work with certain models of phone.
 *
 * HTC devices need formula 1
 * Samsungs want formula 2
 *
 * Samsung Pre-4.4.3 want nothing, so just return the input data
 *
 */
private static int[] string2dec(int[] irData, int frequency) {
    int formula = shouldEquationRun();

    //Should we run any computations on the irData?
    if (formula != 0) {
        for (int i = 0; i < irData.length; i++) {
            if (formula == 1) {
                irData[i] = irData[i] * 1000000 / frequency; 
            } else if (formula == 2) {
                irData[i] = (int) Math.ceil(irData[i] * 26.27272727272727); //this is the samsung formula as per http://developer.samsung.com/android/technical-docs/Workaround-to-solve-issues-with-the-ConsumerIrManager-in-Android-version-lower-than-4-4-3-KitKat
            }
        }
    }
    return irData;
}

/*
 * This method figures out if we should be running the equation in string2dec,
 * which is based on the type of device. Some need it to run in order to function, some need it NOT to run
 *
 * HTC needs it on (HTC One M8)
 * Samsung needs occasionally a special formula, depending on the version
 * Android 5.0+ need it on. 
 * Other devices DO NOT need anything special.
 */
private static int shouldEquationRun() {
    //Some notes on what Build.X will return
    //System.out.println(Build.MODEL); //One M8
    //System.out.println(Build.MANUFACTURER); //htc
    //System.out.println(Build.VERSION.SDK_INT); //19

    //Samsung's way of finding out if their OS is too new to work without a formula:
    //int lastIdx = Build.VERSION.RELEASE.lastIndexOf(".");
    //System.out.println(Build.VERSION.RELEASE.substring(lastIdx+1)); //4

    //handle HTC
    if (Build.MANUFACTURER.equalsIgnoreCase("HTC")) {
        return 1;
    }
    //handle Lollipop (Android 5.0.1 == SDK 21) / beyond
    if (Build.VERSION.SDK_INT >= 21) {
        return 1;
    }
    //handle Samsung PRE-Android 5
    if (Build.MANUFACTURER.equalsIgnoreCase("SAMSUNG")) {
        if (Build.VERSION.SDK_INT >= 19) {
            int lastIdx = Build.VERSION.RELEASE.lastIndexOf(".");
            int VERSION_MR = Integer.valueOf(Build.VERSION.RELEASE.substring(lastIdx + 1));
            if (VERSION_MR < 3) {
                // Before version of Android 4.4.2
                //Note: NO formula here, not even the other one
                return 0;
            } else {
                // Later version of Android 4.4.3
                //run the special samsung formula here
                return 2;
            }
        }
    }
    //if something else...
    return 0;
}

*编辑：多亏了OP的帮助下，我能想出如何解决这个问题。这个答案现在应该解决这个问题。

* Thanks to the OP's help, I was able to figure out how to fix this. This answer should now solve this problem.

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