Question

这是我要调用的活动的代码。包se.anyro.nfc_reader;

import java.nio.charset.Charset;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import se.anyro.nfc_reader.record.ParsedNdefRecord;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.Intent;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.MifareClassic;
import android.nfc.tech.MifareUltralight;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.LayoutInflater;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.example.mposclient.MainActivity;

/**
 * An {@link Activity} which handles a broadcast of a new tag that the device just         discovered.
 */
public class TagViewer extends Activity {

private static final SimpleDateFormat TIME_FORMAT = new SimpleDateFormat();
private LinearLayout mTagContent;

private NfcAdapter mAdapter;
private PendingIntent mPendingIntent;
private NdefMessage mNdefPushMessage;

private AlertDialog mDialog;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tag_viewer);
mTagContent = (LinearLayout) findViewById(R.id.list);
resolveIntent(getIntent());

mDialog = new AlertDialog.Builder(this).setNeutralButton("Ok", null).create();

mAdapter = NfcAdapter.getDefaultAdapter(this);
if (mAdapter == null) {
showMessage(R.string.error, R.string.no_nfc);
}

mPendingIntent = PendingIntent.getActivity(this, 0,
            new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
mNdefPushMessage = new NdefMessage(new NdefRecord[] { newTextRecord(
            "Message from NFC Reader :-)", Locale.ENGLISH, true) });
}

private void showMessage(int title, int message) {
mDialog.setTitle(title);
mDialog.setMessage(getText(message));
mDialog.show();
}

private NdefRecord newTextRecord(String text, Locale locale, boolean encodeInUtf8) {
byte[] langBytes = locale.getLanguage().getBytes(Charset.forName("US-ASCII"));

Charset utfEncoding = encodeInUtf8 ? Charset.forName("UTF-8") : Charset.forName("UTF-16");
byte[] textBytes = text.getBytes(utfEncoding);

int utfBit = encodeInUtf8 ? 0 : (1 << 7);
char status = (char) (utfBit + langBytes.length);

byte[] data = new byte[1 + langBytes.length + textBytes.length];
data[0] = (byte) status;
System.arraycopy(langBytes, 0, data, 1, langBytes.length);
System.arraycopy(textBytes, 0, data, 1 + langBytes.length, textBytes.length);

return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], data);
}

@Override
protected void onResume() {
super.onResume();
if (mAdapter != null) {
if (!mAdapter.isEnabled()) {
showMessage(R.string.error, R.string.nfc_disabled);
}
mAdapter.enableForegroundDispatch(this, mPendingIntent, null, null);
mAdapter.enableForegroundNdefPush(this, mNdefPushMessage);
}
}

@Override
protected void onPause() {
super.onPause();
if (mAdapter != null) {
mAdapter.disableForegroundDispatch(this);
mAdapter.disableForegroundNdefPush(this);
}
}

private void resolveIntent(Intent intent) {
String action = intent.getAction();
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)
            || NfcAdapter.ACTION_TECH_DISCOVERED.equals(action)
            || NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) {
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
NdefMessage[] msgs;
if (rawMsgs != null) {
msgs = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
msgs[i] = (NdefMessage) rawMsgs[i];
}
} else {
// Unknown tag type
byte[] empty = new byte[0];
byte[] id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
Parcelable tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
byte[] payload = dumpTagData(tag).getBytes();

NdefRecord record = new NdefRecord(NdefRecord.TNF_UNKNOWN, empty, id, payload);
NdefMessage msg = new NdefMessage(new NdefRecord[] { record });
msgs = new NdefMessage[] { msg };             
}
// Setup the views
buildTagViews(msgs);
}
}

private String dumpTagData(Parcelable p) {
StringBuilder sb = new StringBuilder();
Tag tag = (Tag) p;
byte[] id = tag.getId();
sb.append("Tag ID (hex): ").append(getHex(id)).append("\n");
sb.append("Tag ID (dec): ").append(getDec(id)).append("\n");

String prefix = "android.nfc.tech.";
sb.append("Technologies: ");
for (String tech : tag.getTechList()) {
sb.append(tech.substring(prefix.length()));
sb.append(", ");
}
sb.delete(sb.length() - 2, sb.length());
for (String tech : tag.getTechList()) {
if (tech.equals(MifareClassic.class.getName())) {
sb.append('\n');
MifareClassic mifareTag = MifareClassic.get(tag);
String type = "Unknown";
switch (mifareTag.getType()) {
case MifareClassic.TYPE_CLASSIC:
type = "Classic";
break;
case MifareClassic.TYPE_PLUS:
type = "Plus";
break;
case MifareClassic.TYPE_PRO:
type = "Pro";
break;
}
sb.append("Mifare Classic type: ");
sb.append(type);
sb.append('\n');

sb.append("Mifare size: ");
sb.append(mifareTag.getSize() + " bytes");
sb.append('\n');

sb.append("Mifare sectors: ");
sb.append(mifareTag.getSectorCount());
sb.append('\n');

sb.append("Mifare blocks: ");
sb.append(mifareTag.getBlockCount());
}
if (tech.equals(MifareUltralight.class.getName())) {
sb.append('\n');
MifareUltralight mifareUlTag = MifareUltralight.get(tag);
String type = "Unknown";
switch (mifareUlTag.getType()) {
case MifareUltralight.TYPE_ULTRALIGHT:
type = "Ultralight";
break;
case MifareUltralight.TYPE_ULTRALIGHT_C:
type = "Ultralight C";
break;
}
sb.append("Mifare Ultralight type: ");
sb.append(type);
}
}  
return sb.toString();
}

private String getHex(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (int i = bytes.length - 1; i >= 0; --i) {
int b = bytes[i] & 0xff;
if (b < 0x10)
sb.append('0');
sb.append(Integer.toHexString(b));
if (i > 0) {
sb.append(" ");
}
}
return sb.toString();
}

private long getDec(byte[] bytes) {
long result = 0;
long factor = 1;
for (int i = 0; i < bytes.length; ++i) {
long value = bytes[i] & 0xffl;
result += value * factor;
factor *= 256l;
}
return result;
}

void buildTagViews(NdefMessage[] msgs) {
if (msgs == null || msgs.length == 0) {
return;
}
LayoutInflater inflater = LayoutInflater.from(this);
LinearLayout content = mTagContent;

// Parse the first message in the list
// Build views for all of the sub records
Date now = new Date();
List<ParsedNdefRecord> records = NdefMessageParser.parse(msgs[0]);

final int size = records.size();
for (int i = 0; i < size; i++) {
TextView timeView = new TextView(this);
timeView.setText(TIME_FORMAT.format(now));
content.addView(timeView, 0);
ParsedNdefRecord record = records.get(i);
// line which displays the text 
content.addView(record.getView(this, inflater, content, i), 1 + i);
content.addView(inflater.inflate(R.layout.tag_divider, content, false), 2 + i);
byte[] payload = msgs[0].getRecords()[0].getPayload();
String data = new String(payload);
Toast.makeText(getApplicationContext(), data,
Toast.LENGTH_SHORT).show();

String[] words = data.split(" ");  
Intent callMain=new Intent(TagViewer.this,MainActivity.class);
callMain.putExtra("expid", words[0]);
callMain.putExtra("exname", words[1]);
callMain.putExtra("exprice", words[2]);
startActivity(callMain);
}
}

@Override
public void onNewIntent(Intent intent) {
setIntent(intent);
resolveIntent(intent);
}
}

这是清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.accountmanager"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="10"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.NFC" />

    <uses-feature android:name="android.hardware.nfc" />

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

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="se.anyro.nfc_reader.TagViewer"
            android:alwaysRetainTaskState="true"
            android:label="@string/app_name"
            android:launchMode="singleInstance"
            android:screenOrientation="nosensor" >
            <intent-filter>
                <action android:name="android.nfc.action.TAG_DISCOVERED" />

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

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.MainActivity"
            android:label="@string/app_name" >
        </activity>
        <activity
            android:name="com.example.accountmanager.Register"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.mposclient.ProductList"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.AccountDetails"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.ClientActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.ClientTabsActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.Credentials"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.mposclient.DBHelper"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.mposclient.ListActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.mposclient.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.mposclient.ParseData"
            android:label="@string/app_name" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.Options"
            android:label="@string/title_activity_options" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.SwipeCard"
            android:label="@string/title_activity_swipe_card" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.Transaction"
            android:label="@string/title_activity_transaction" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.DatabaseHelper"
            android:label="@string/title_activity_database_helper" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.TransList"
            android:label="@string/title_activity_trans_list" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.example.accountmanager.MainActivity2"
            android:label="@string/title_activity_main_activity2" >
        </activity>
    </application>

</manifest>

这里的问题是我想启动活动TagViewer，但是当应用程序运行时，正在调用其他一些活动而且它没有响应我无法点击它的按钮等。请检查代码中是否有任何错误，因为日志没有显示任何错误，只是没有打开正确的活动

这是logcat显示的内容。

Installing AccountManager.apk...
Success!
Project dependency found, installing: nfc-reader
Uploading nfc-reader.apk onto device 
Installing nfc-reader.apk...
Success!
Starting activity se.anyro.nfc_reader.TagViewer on device 4df7e2387663cf87
ActivityManager: Starting: Intent { act=android.intent.action.MAIN cat=  [android.intent.category.LAUNCHER]    cmp=com.example.accountmanager/se.anyro.nfc_reader.TagViewer }

未调用的目标活动

0 个答案: