ConsumerIrManage.hasIrEmitter()始终返回false(API 19) [英] ConsumerIrManage.hasIrEmitter() always returns false (API 19)

问题描述

我在LG G2上拨打了ConsumerIrManager.hasIrEmitter()，但它始终返回false.

I call ConsumerIrManager.hasIrEmitter() on my LG G2, but it always returns false.

根据红外发射器上的文档:

According to the documentation on Infrared transmitters:

在包含红外(IR)发射器的设备上运行时，现在可以使用ConsumerIrManager API发射红外信号.要获取ConsumerIrManager的实例，请以CONSUMER_IR_SERVICE作为参数调用getSystemService().然后，您可以使用getCarrierFrequencies()查询设备支持的IR频率，并通过使用transmit()传递所需的频率和信号模式来发送信号.

When running on a device that includes an infrared (IR) transmitter, you can now transmit IR signals using the ConsumerIrManager APIs. To get an instance of ConsumerIrManager, call getSystemService() with CONSUMER_IR_SERVICE as the argument. You can then query the device's supported IR frequencies with getCarrierFrequencies() and transmit signals by passing your desired frequency and signal pattern with transmit().

您应该始终先通过调用hasIrEmitter()来检查设备是否包括红外发射器，但是如果您的应用仅与具有红外发射器的设备兼容，则应在"android.hardware.consumerir"的清单中包含<uses-feature>元素. (FEATURE_CONSUMER_IR).

You should always first check whether a device includes an IR transmitter by calling hasIrEmitter(), but if your app is compatible only with devices that do have one, you should include a <uses-feature> element in your manifest for "android.hardware.consumerir" (FEATURE_CONSUMER_IR).

我的代码如下:

MainActivity.java

import android.hardware.ConsumerIrManager;
....

@Override
protected void onCreate(Bundle savedInstanceState) {
    ....
    ConsumerIrManager mCIR = (ConsumerIrManager)getSystemService(CONSUMER_IR_SERVICE);
    Log.e(TAG, "mCIR.hasIrEmitter(): " + mCIR.hasIrEmitter());
    PackageManager pm = getPackageManager();
    Log.e(TAG, "pm.hasSystemFeature(PackageManager.FEATURE_CONSUMER_IR): "
        + pm.hasSystemFeature(PackageManager.FEATURE_CONSUMER_IR));
    FeatureInfo[] fi = pm.getSystemAvailableFeatures();
    for (int i = 0; i < fi.length; i++) {
        Log.e(TAG, "Feature: " + fi[i].name);
    }
    ....
}

AndroidManifest.xml

<uses-permission android:name="android.permission.TRANSMIT_IR" android:required="false" />
<uses-feature android:name="android.hardware.consumerir" />

在SystemAvailableFeatures列表中我看不到"android.hardware.consumerir"(FEATURE_CONSUMER_IR)，但是LG G2确实具有IR.

In SystemAvailableFeatures list I cannot see "android.hardware.consumerir" (FEATURE_CONSUMER_IR), but the LG G2 definitely has IR.

有人成功使用了hasEmitterIr()吗?

推荐答案

对于任何想从十六进制IR代码转换为十进制计数"模式再转换为十进制持续时间"模式的人:

For anyone else who wants to go from a hex IR code to a decimal 'count' pattern to a decimal 'duration' pattern:

Samsung Power十六进制代码(摘自 remotecentral.com ) :

Samsung Power hex code (From remotecentral.com):

0000 006d 0022 0003 00a9 00a8 0015 003f 0015 003f 0015 003f 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 003f 0015 003f 0015 003f 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 003f 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0040 0015 0015 0015 003f 0015 003f 0015 003f 0015 003f 0015 003f 0015 003f 0015 0702 00a9 00a8 0015 0015 0015 0e6e

使用 irdude :

38028,169,168,21,63,21,63,21,63,21,21,21,21,21,21,21,21,21,21,21,63,21,63,21,63,21,21,21,21,21,21,21,21,21,21,21,21,21,63,21,21,21,21,21,21,21,21,21,21,21,21,21,64,21,21,21,63,21,63,21,63,21,63,21,63,21,63,21,1794,169,168,21,21,21,3694

使用第一个参数作为频率，并将其余参数放入计数模式的int数组中:

Use the first argument as your frequency and put the rest in an int array for your Count Pattern:

private static final int SAMSUNG_FREQ = 38028;
private static final int[] SAMSUNG_POWER_TOGGLE_COUNT = {169,168,21,63,21,63,21,63,21,21,21,21,21,21,21,21,21,21,21,63,21,63,21,63,21,21,21,21,21,21,21,21,21,21,21,21,21,63,21,21,21,21,21,21,21,21,21,21,21,21,21,64,21,21,21,63,21,63,21,63,21,63,21,63,21,63,21,1794,169,168,21,21,21,3694};

使用频率查找每秒的脉冲:

Use the frequency to find the pulses per second:

Frequency: 38028; 
Second: 1,000,000 Microseconds
Second/Frequency = Pulses
1000000/38028 = ~26.3 Pulses

通过将每个值乘以脉冲将计数模式转换为持续时间模式:

Convert the Count Pattern to Duration Pattern by multiplying each value by the pulses:

169 * 26.3 = 4444
168 * 26.3 = 4418
21 * 26.3 = 552
...

如果您想要一种快速的方法来获取包含所有Duration值的字符串，则只需通过hex2dec方法运行十六进制代码，然后在此方法中使用该输出即可:

If you want a quick way to get a string with all of the Duration values, then just run your hex code through the hex2dec method and then use that output in this method:

protected String count2duration(String countPattern) {
    List<String> list = new ArrayList<String>(Arrays.asList(countPattern.split(",")));
          int frequency = Integer.parseInt(list.get(0));
          int pulses = 1000000/frequency;
          int count;
          int duration;

          list.remove(0);

          for (int i = 0; i < list.size(); i++) {
           count = Integer.parseInt(list.get(i));
           duration = count * pulses;
           list.set(i, Integer.toString(duration));
          }

          String durationPattern = "";
          for (String s : list) {
           durationPattern += s + ",";
          }

          Log.d(TAG, "Frequency: " + frequency);
          Log.d(TAG, "Duration Pattern: " + durationPattern);

    return durationPattern;
}

这会将十进制持续时间值的字符串打印到日志中.然后，我只需复制该内容(不包括第一个值)，然后制作一个静态的最终int数组，如下所示:

That will print the string of decimal duration values to the log. I would then just copy that (not including the first value) and make a static final int array like this:

    private static final int[] SAMSUNG_POWER_TOGGLE_DURATION = {4495,4368,546,1638,546,1638,546,1638,546,546,546,546,546,546,546,546,546,546,546,1638,546,1638,546,1638,546,546,546,546,546,546,546,546,546,546,546,546,546,1638,546,546,546,546,546,546,546,546,546,546,546,546,546,1664,546,546,546,1638,546,1638,546,1638,546,1638,546,1638,546,1638,546,46644,4394,4368,546,546,546,96044};

因此，既然您拥有两个模式作为静态最终int数组，则可以传输:

So now that you have your two patterns as static final int arrays, you can transmit:

ConsumerIrManager mCIR;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Get a reference to the ConsumerIrManager
    mCIR = (ConsumerIrManager) this.getSystemService(Context.CONSUMER_IR_SERVICE);

    setContentView(R.layout.consumer_ir);

    // Set the OnClickListener for the button so we see when it's pressed.
    findViewById(R.id.send_button).setOnClickListener(mSendClickListener);
}


View.OnClickListener mSendClickListener = new View.OnClickListener() {
    public void onClick(View v) {
        if (!mCIR.hasIrEmitter()) {
            Log.e(TAG, "No IR Emitter found\n");
            return;
        }

        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
            mCIR.transmit(SAMSUNG_FREQ, SAMSUNG_POWER_TOGGLE_COUNT);
            } else { 
             // Later version of Android 4.4.3
             mCIR.transmit(SAMSUNG_FREQ, SAMSUNG_POWER_TOGGLE_DURATION);
            }
        }
    }   
};

注意:我不确定4.4.4需要哪种模式.

Note: I'm not sure which pattern 4.4.4 needs.

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