Android 通过伪造NFC标签扫描测试应用程序
我是Android新手,致力于近场通信,从NFC标签读取数据。我既没有NFC支持的Android mobile,也没有NFC标签来测试我创建的应用程序 我发现下面两篇文章说的是通过触发意图来伪造NFC标签扫描 我根据第一篇文章修改了我的代码,点击一个按钮,我触发了第一个活动中所需的意图。然而,我又创造了一个能够处理相同意图的活动。NFC标签的读取和处理数据基于第二个活动上的按钮点击 问题是:每当我从第一个活动触发伪NFC标记扫描意图时,它都会抛出一个错误“找不到处理意图的活动{act=android.NFC.action.NDEF_DISCOVERED(has extras)}” 清单文件如下所示:Android 通过伪造NFC标签扫描测试应用程序,android,android-intent,mocking,nfc,ndef,Android,Android Intent,Mocking,Nfc,Ndef,我是Android新手,致力于近场通信,从NFC标签读取数据。我既没有NFC支持的Android mobile,也没有NFC标签来测试我创建的应用程序 我发现下面两篇文章说的是通过触发意图来伪造NFC标签扫描 我根据第一篇文章修改了我的代码,点击一个按钮,我触发了第一个活动中所需的意图。然而,我又创造了一个能够处理相同意图的活动。NFC标签的读取和处理数据基于第二个活动上的按钮点击 问题是:每当我从第一个活动触发伪NFC标记扫描意图时,它都会抛出一个错误“找不到处理意图的活动{act=and
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.expensemanager.saubhattacharya">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.NFC"/>
<uses-feature android:name="android.hardware.nfc" android:required="false" />
<application
android:allowBackup="true"
android:icon="@mipmap/icon1"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Set_Monthly_Target"
android:label="@string/title_activity_set__monthly__target"
android:parentActivityName=".MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.expensemanager.saubhattacharya.MainActivity" />
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain"/>
<data android:mimeType="image/*" />
</intent-filter>
</activity>
<activity
android:name=".Add_Daily_Expense"
android:label="@string/add_daily_expense_activity"
android:parentActivityName=".MainActivity">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.expensemanager.saubhattacharya.MainActivity" />
<intent-filter>
<action android:name="android.nfc.action.NDEF_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain"/>
<data android:mimeType="image/*" />
</intent-filter>
</activity>
</application>
</manifest>
处理上述触发器的第二个活动的代码段如下:
public void scan_tag (View view)
{
final Intent intent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
intent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, "Custom Messages");
startActivity(intent);
}
public class Add_Daily_Expense extends AppCompatActivity {
Button read_data;
TextView show_data;
Tag detected_tag;
NfcAdapter nfcAdapter;
IntentFilter[] intentFilters;
public static final String MIME_TEXT_PLAIN = "text/plain";
public static final String MIME_IMAGE_ALL = "image/*";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add__daily__expense);
final PackageManager pm = this.getPackageManager();
show_data = (TextView) findViewById(R.id.show_data);
nfcAdapter = NfcAdapter.getDefaultAdapter(getApplicationContext());
read_data = (Button) findViewById(R.id.read_nfc);
read_data.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!pm.hasSystemFeature(PackageManager.FEATURE_NFC)) {
try {
AlertDialog.Builder builder = new AlertDialog.Builder(Add_Daily_Expense.this);
builder.setMessage("NFC feature is not available on this device!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
} catch (Exception e) {
e.printStackTrace();
}
} else {
Toast.makeText(getApplicationContext(), "NFC feature is available on this device!", Toast.LENGTH_SHORT).show();
HandleIntent(getIntent());
}
}
});
}
public void HandleIntent(Intent intent)
{
String action = intent.getAction();
if(NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action))
{
detected_tag = getIntent().getParcelableExtra(nfcAdapter.EXTRA_TAG);
NDefReaderTask NDefReader = new NDefReaderTask();
NDefReader.execute();
}
}
public void onResume()
{
super.onResume();
if(nfcAdapter != null)
setupForeGroundDispatch(this, nfcAdapter);
}
public void onPause()
{
super.onPause();
if(nfcAdapter != null)
stopForeGroundDispatch(this, nfcAdapter);
}
public void onNewIntent(Intent intent)
{
HandleIntent(intent);
}
public void setupForeGroundDispatch (final Activity activity, NfcAdapter nfcAdapter)
{
Intent new_intent = new Intent(getApplicationContext(),Add_Daily_Expense.class);
new_intent.setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),0,new_intent,0);
intentFilters = new IntentFilter[1];
String[][] techList = new String[][]{};
intentFilters[0] = new IntentFilter();
intentFilters[0].addAction(NfcAdapter.ACTION_NDEF_DISCOVERED);
intentFilters[0].addCategory(Intent.CATEGORY_DEFAULT);
try {
intentFilters[0].addDataType(MIME_TEXT_PLAIN);
intentFilters[0].addDataType(MIME_IMAGE_ALL);
}
catch(IntentFilter.MalformedMimeTypeException me)
{
me.printStackTrace();
}
nfcAdapter.enableForegroundDispatch(activity, pendingIntent, intentFilters, techList);
}
public void stopForeGroundDispatch (final Activity activity, NfcAdapter nfcAdapter)
{
nfcAdapter.disableForegroundDispatch(activity);
}
public class NDefReaderTask extends AsyncTask <Tag, Void, String>
{
@Override
protected String doInBackground(Tag... params)
{
try
{
detected_tag = params[0];
Ndef ndef = Ndef.get(detected_tag);
ndef.connect();
if(ndef != null)
{
NdefMessage ndefMessage = ndef.getCachedNdefMessage();
NdefRecord[] records = ndefMessage.getRecords();
for(NdefRecord ndefRecord : records)
{
if((ndefRecord.getTnf() == NdefRecord.TNF_ABSOLUTE_URI) || (ndefRecord.getTnf() == NdefRecord.TNF_WELL_KNOWN))
{
byte[] payload = ndefRecord.getPayload();
String encoding1 = "UTF-8";
String encoding2 = "UTF-16";
String textEncoding = ((payload[0] & 128) == 0) ? encoding1 : encoding2;
int languageCodeLength = payload[0] & 0063;
return new String(payload, languageCodeLength + 1, payload.length - languageCodeLength - 1, textEncoding);
}
}
}
ndef.close();
}
catch (UnsupportedEncodingException UE)
{
UE.printStackTrace();
}
catch (IOException IE)
{
IE.printStackTrace();
}
return null;
}
@Override
protected void onPreExecute()
{
}
protected void onPostExecute(String result)
{
if(result != null)
{
show_data.setText(result);
}
}
}
}
公共类添加日常费用活动{
按钮读取数据;
文本视图显示数据;
检测到的标签\u标签;
NfcAdapter NfcAdapter;
意向过滤器[]意向过滤器;
公共静态最终字符串MIME\u TEXT\u PLAIN=“TEXT/PLAIN”;
公共静态最终字符串MIME_IMAGE_ALL=“IMAGE/*”;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u add\u daily\u expense);
final PackageManager pm=this.getPackageManager();
show_data=(TextView)findViewById(R.id.show_data);
nfcAdapter=nfcAdapter.getDefaultAdapter(getApplicationContext());
读取数据=(按钮)findViewById(R.id.read\u nfc);
read_data.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图v){
如果(!pm.hasSystemFeature(PackageManager.FEATURE\u NFC)){
试一试{
AlertDialog.Builder=新建AlertDialog.Builder(添加每日费用。此项);
setMessage(“此设备上没有NFC功能!”)
.setCancelable(错误)
.setPositiveButton(“确定”,新的DialogInterface.OnClickListener(){
public void onClick(DialogInterface对话框,int-id){
dialog.cancel();
}
});
AlertDialog alert=builder.create();
alert.show();
}捕获(例外e){
e、 printStackTrace();
}
}否则{
Toast.makeText(getApplicationContext(),“此设备上有NFC功能!”,Toast.LENGTH\u SHORT.show();
HandleIntent(getIntent());
}
}
});
}
公共无效手册内容(意图)
{
String action=intent.getAction();
if(NfcAdapter.ACTION\u NDEF\u DISCOVERED.equals(ACTION))
{
检测到的_标记=getIntent().getParcelableExtra(nfcAdapter.EXTRA_标记);
NDefReaderTask NDefReader=新的NDefReaderTask();
NDefReader.execute();
}
}
恢复时公开作废()
{
super.onResume();
如果(nfcAdapter!=null)
setupForeGroundDispatch(本,nfcAdapter);
}
公共无效暂停()
{
super.onPause();
如果(nfcAdapter!=null)
stopForeGroundDispatch(本,nfcAdapter);
}
公共帐篷(意向)
{
手册内容(意图);
}
公共无效设置ForegroundDispatch(最终活动活动,NfcAdapter NfcAdapter)
{
Intent new\u Intent=newintent(getApplicationContext(),Add\u Daily\u Expense.class);
新的\u意向。设置标志(意向。标志\u活动\u单个\u顶部);
pendingent pendingent=pendingent.getActivity(getApplicationContext(),0,new_intent,0);
intentFilters=新IntentFilter[1];
字符串[][]技术列表=新字符串[][]{};
IntentFilter[0]=新的IntentFilter();
intentFilters[0].addAction(发现NfcAdapter.ACTION\u NDEF\u);
intentFilters[0].addCategory(Intent.CATEGORY\u默认值);
试一试{
intentFilters[0]。addDataType(MIME\u TEXT\u PLAIN);
intentFilters[0]。addDataType(MIME\u IMAGE\u ALL);
}
捕获(IntentFilter.MalformAdminetypeException me)
{
me.printStackTrace();
}
nfcAdapter.enableForegroundDispatch(活动、未决事件、意向过滤器、技术列表);
}
公共作废stopForeGroundDispatch(最终活动活动,NfcAdapter NfcAdapter)
{
nfcAdapter.disableForegroundDispatch(活动);
}
公共类NDefReaderTask扩展了AsyncTask
{
@凌驾
受保护的字符串doInBackground(标记…参数)
{
尝试
{
检测到的_标记=参数[0];
Ndef Ndef=Ndef.get(检测到的标签);
connect();
如果(ndef!=null)
{
NdefMessage NdefMessage=ndef.getCachedNdefMessage();
NdefRecord[]records=ndefMessage.getRecords();
用于(NdefRecord NdefRecord:记录)
{
if((ndefRecord.getTnf()==ndefRecord.TNF_绝对值_URI)| |(ndefRecord.getTnf()==ndefRecord.TNF_众所周知))
{
字节[]有效载荷=ndefRecord.getPayload();
字符串编码1=“UTF-8”;
字符串编码2=“UTF-16”;
字符串textEncoding=((有效负载[0]&128)==0)?编码1:encoding2;
int languageCodeLength=有效负载[0]&0063;
返回新字符串(payload,languageCodeLength+1,payload.length-languageCodeLength-1,textEncoding);
}
}
}
ndef.close();
}
捕获(不支持的编码异常)
{
UE.printStackTrace();
}
捕获(IOIE)
{
即printStackTrace();
}
返回null;
}
@凌驾
普罗特
<data android:mimeType="text/plain"/>
<data android:mimeType="image/*" />
public void scan_tag (View view) {
final Intent intent = new Intent(NfcAdapter.ACTION_NDEF_DISCOVERED);
intent.setType("text/plain");
intent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, ...);
startActivity(intent);
}
detected_tag = getIntent().getParcelableExtra(nfcAdapter.EXTRA_TAG);
Ndef ndef = Ndef.get(detected_tag);