如何模拟从其他应用程序标签触摸 [英] How to simulate the tag touch from other application

问题描述

我要模拟的触摸事件我的应用程序。我的清单是像

I want to simulate the touch event for my application. My manifest is like

<activity
    android:name=".activity.TagActivity_"
    android:label="@string/app_name"
    android:launchMode="singleTask"
    android:noHistory="true"
    android:permission="android.permission.NFC"
    android:screenOrientation="portrait" >

    <intent-filter>
        <action android:name="android.nfc.action.TECH_DISCOVERED" />
    </intent-filter>
    <meta-data
        android:name="android.nfc.action.TECH_DISCOVERED"
        android:resource="@xml/nfc_tech_filter" />

    <intent-filter>
        <action android:name="android.nfc.action.NDEF_DISCOVERED" />
        <category android:name="android.intent.category.DEFAULT" />
        <data
            android:host="ext"
            android:pathPrefix="/abc:d"
            android:scheme="vnd.android.nfc" />
    </intent-filter>
    <intent-filter>
        <action android:name="android.nfc.action.NDEF_DISCOVERED"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <data android:mimeType="text/plain" />
    </intent-filter>
</activity>

问题（1）：我想从调用其它应用我的应用程序。我怎么做？我现在的code是这样的：

Question (1): I want to invoke my application from other application. How do I do that? My current code is like:

try {
    final Intent intent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
    NdefMessage ndefMessage = buildNdefMessage(getTagData());
    intent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, new NdefMessage[] {ndefMessage});
    startActivity(intent);
} catch (Exception e) {
    e.printStackTrace();
}

但这不是调用我的应用程序。大概是因为数据类型和路径preFIX不匹配。我如何通过这一点的同时开始活动？

But this is not invoking my application. probably because the data type and path prefix do not match. How do I pass this while starting the activity?

问题（2）：对于温度的目的我已经加入

Question (2): For temp purpose I have added

<intent-filter>
    <action android:name="android.nfc.action.NDEF_DISCOVERED" />
    <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

，使其工作，我的应用程序被调用。但是，当读取标签我检查标签类型，因为我不传递任何变量类型，我的应用程序崩溃。那么，如何创建一个标签实例？有没有构造这一点。我的意思是我不能做 NDEF NDEF =新NDEF（）; 。我基本上不具有标签，所以我不能做大事 NDEF NDEF = Ndef.get（标签）;

to make it work, and my application is invoked. But while reading the tag I check the tag type, and since I am not passing any tag type, my app crashes. So how do I create a tag instance? There is no constructor for this. I mean I can't do Ndef ndef = new Ndef();. And I don't basically have a tag so I can't event do Ndef ndef = Ndef.get(tag);.

推荐答案

关于问题（1）：如何调用 NDEF_DISCOVERED 意图过滤器

Regarding question (1): How to invoke NDEF_DISCOVERED intent filter

您活动.activity.TagActivity_过滤器有两种不同的 NDEF_DISCOVERED 。如果意图包含以下形式的URI的第一个匹配vnd.android.nfc：// EXT / ABC：D。如果意图包含的数据类型的第二个匹配text / plain的。

Your activity ".activity.TagActivity_" filters has two different NDEF_DISCOVERED. The first one matches if the intent contains a URI of the form "vnd.android.nfc://ext/abc:d". The second one matches if the intent contains a data type of "text/plain".

因此​​，你需要或者添加匹配URI或匹配MIME类型，你用它来启动该活动的意图。

Consequently, you need to either add a matching URI or a matching MIME type to the intent that you use to start that activity.

1. MIME类型文本/纯：

1. MIME type "text/plain":

final Intent intent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
intent.setType("text/plain");
startActivity(intent);

URIvnd.android.nfc：// EXT / ABC：D：

URI "vnd.android.nfc://ext/abc:d":

final Intent intent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
intent.setData(Uri.parse("vnd.android.nfc://ext/abc:d"));
startActivity(intent);

任何两个将开始您的活动。

Any of the two will start your activity.

注意您指定安卓权限=android.permission.NFC为您接收的活动。你通常不会做。指定此权限意味着你发送应用程序需要有这个权限。

NOTE that you specified android:permission="android.permission.NFC" for your receiving activity. You normally would not do that. Specifying this permission means that your sending application needs to have that permission.

关于问题（2）：如何通过一个模拟标记对象

这是可能使用反射（注意，这是不是大众的Andr​​oid SDK的一部分，所以它可能无法为未来的Andr​​oid版本），以便创建一个模拟标记对象实例。

It's possible to create a mock tag object instance using reflection (note that this is not part of the public Android SDK, so it might fail for future Android versions).

1. 获得 createMockTag（）方法虽然反映：

Class tagClass = Tag.class;
Method createMockTagMethod = tagClass.getMethod("createMockTag", byte[].class, int[].class, Bundle[].class);

为$ P $一些常量pparing有效的模拟NDEF标记实例：

Define some constants for preparing a valid mock NDEF tag instance:

final int TECH_NFC_A = 1;
final String EXTRA_NFC_A_SAK = "sak";    // short (SAK byte value)
final String EXTRA_NFC_A_ATQA = "atqa";  // byte[2] (ATQA value)

final int TECH_NDEF = 6;
final String EXTRA_NDEF_MSG = "ndefmsg";              // NdefMessage (Parcelable)
final String EXTRA_NDEF_MAXLENGTH = "ndefmaxlength";  // int (result for getMaxSize())
final String EXTRA_NDEF_CARDSTATE = "ndefcardstate";  // int (1: read-only, 2: read/write, 3: unknown)
final String EXTRA_NDEF_TYPE = "ndeftype";            // int (1: T1T, 2: T2T, 3: T3T, 4: T4T, 101: MF Classic, 102: ICODE)

创建NDEF消息：

Create an NDEF message:

NdefMessage ndefMessage = new NdefMessage(NdefRecord.createMime("text/plain"), "Text".getBytes("US-ASCII"));

创建与NDEF消息2类标签的技术含量的额外软件包：

Create the tech-extras bundle for a Type 2 tag with that NDEF message:

Bundle nfcaBundle = new Bundle();
nfcaBundle.putByteArray(EXTRA_NFC_A_ATQA, new byte[]{ (byte)0x44, (byte)0x00 }); //ATQA for Type 2 tag
nfcaBundle.putShort(EXTRA_NFC_A_SAK , (short)0x00); //SAK for Type 2 tag

Bundle ndefBundle = new Bundle();
ndefBundle.putInt(EXTRA_NDEF_MAXLENGTH, 48); // maximum message length: 48 bytes
ndefBundle.putInt(EXTRA_NDEF_CARDSTATE, 1); // read-only
ndefBundle.putInt(EXTRA_NDEF_TYPE, 2); // Type 2 tag
ndefBundle.putParcelable(EXTRA_NDEF_MSG, ndefMessage);  // add an NDEF message

prepare您标签的防碰撞识别/ UID（见 Tag.getId（）方法）。例如。 7字节UID为2类标签：

Prepare an anti-collision identifier/UID for your tag (see Tag.getId() method). E.g. a 7-byte-UID for a Type 2 tag:

byte[] tagId = new byte[] { (byte)0x3F, (byte)0x12, (byte)0x34, (byte)0x56, (byte)0x78, (byte)0x90, (byte)0xAB };

然后就可以通过调用 createMockTag（）方法创建一个模拟标记实例

Then you can create a mock tag instance by invoking the createMockTag() method

Tag mockTag = (Tag)createMockTagMethod.invoke(null,
        tagId,                                     // tag UID/anti-collision identifier (see Tag.getId() method)
        new int[] { TECH_NFC_A, TECH_NDEF },       // tech-list
        new Bundle[] { nfcaBundle, ndefBundle });  // array of tech-extra bundles, each entry maps to an entry in the tech-list

一旦你创建了一个模拟标记对象，你可以把它作为 NDEF_DISCOVERED 意图的一部分：

Once you created that mock tag object, you can send it as part of the NDEF_DISCOVERED intent:

Intent ndefIntent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
ndefIntent.setType("text/plain");
ndefIntent.putExtra(NfcAdapter.EXTRA_ID, tagId);
ndefIntent.putExtra(NfcAdapter.EXTRA_TAG, mockTag);
ndefIntent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, new NdefMessage[]{ ndefMessage });

此外，您可以明确地定义你的目标活动为接收组件：

Optionally, you can explicitly define your target activity as the receiving component:

ndefIntent.setComponent(...); // or equivalent

您可以发送这个意图您的活动：

You can then send this intent to your activity:

startActivity(ndefIntent);

然后接收器可以使用标签MOCH对象检索技术类的实例（例如 Ndef.get（标签）），但需要IO操作将<任何方法STRONG>失败

The receiver can then use the moch tag object to retrieve instances of the technology classes (e.g. Ndef.get(tag)) but any method that requires IO operations will fail.

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