NFCへの返信といくつかのことのおかげで、ユーザーがタグを読むことができるコードを理解し、コンパイルすることができました。タグに私のコードに類似した文字列が含まれている場合は、クーポンが追加され（画像が変更され）、整数が1つ増えます。この整数はSharedPreferencesによって保存され、ユーザーが収集したクーポンの数を決定して、Resumeに表示するために使用されます。
ただし、コンパイル後、実行しようとすると、アプリケーションはすぐに停止します。誰かが私が間違っているかもしれないことをチェックするのを手伝ってもらえますか？ちょっと長いことは知っていますが、何が悪かったのか本当にわかりません。
@TargetApi(10)
//I have to use this line of code because I'm targetted to code at API 8 but some NFC functionalities that I use requires API 10.
public class CouponManager extends Activity {
private static final String TAG = "NFCReadTag";
private NfcAdapter mNfcAdapter;
private IntentFilter[] mNdefExchangeFilters;
private PendingIntent mNfcPendingIntent;
public static final String PREF_FILE_NAME = "PrefFile";
private int[] images = new int[10];
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.coupon_layout);
//List of images
images[0]=R.drawable.cp0;
images[1]=R.drawable.cp1;
images[2]=R.drawable.cp2;
images[3]=R.drawable.cp3;
images[4]=R.drawable.cp4;
images[5]=R.drawable.cp5;
images[6]=R.drawable.cp6;
images[7]=R.drawable.cp7;
images[8]=R.drawable.cp8;
images[9]=R.drawable.cp9;
images[10]=R.drawable.cp10;
//Restore preferences
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
int storedPreference = preferences.getInt("storedInt", 0);
//Image to use depending on coupon collected
final ImageView img = new ImageView(this);
if(storedPreference!=10)
{
img.setImageResource(images[storedPreference]);
}
else
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setCancelable(false);
builder.setTitle("Redeem Your Coupon?");
builder.setInverseBackgroundForced(true);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("storedInt", 0); // value to store
editor.commit();
img.setImageResource(images[0]);
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
img.setImageResource(images[10]);
}
});
}
//Check and send Intent from NFC tag discovered
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
mNfcPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
| Intent.FLAG_ACTIVITY_CLEAR_TOP), 0);
IntentFilter coupontag = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
coupontag.addDataScheme("http");
coupontag.addDataAuthority("www.ichatime.com", null);
coupontag.addDataPath(".*", PatternMatcher.PATTERN_SIMPLE_GLOB);
mNdefExchangeFilters = new IntentFilter[] { coupontag };
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
protected void onResume() {
super.onResume();
if(mNfcAdapter != null) {
mNfcAdapter.enableForegroundDispatch(this, mNfcPendingIntent,
mNdefExchangeFilters, null);
} else {
Toast.makeText(getApplicationContext(), "Sorry, No NFC Adapter found.", Toast.LENGTH_SHORT).show();
}
}
@Override
protected void onPause() {
super.onPause();
if(mNfcAdapter != null) mNfcAdapter.disableForegroundDispatch(this);
}
@Override
protected void onStop() {
super.onStop();
// We need an Editor object to make preference changes.
// All objects are from android.context.Context
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
int storedPreference = preferences.getInt("storedInt", 0);
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("storedInt", storedPreference); // value to store
editor.commit();
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
int storedPreference = preferences.getInt("storedInt", 0);
if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
NdefMessage[] messages = null;
Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (rawMsgs != null) {
messages = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
messages[i] = (NdefMessage) rawMsgs[i];
}
}
if(messages[0] != null) {
String result="";
byte[] payload = messages[0].getRecords()[0].getPayload();
// this assumes that we get back am SOH followed by host/code
for (int b = 1; b<payload.length; b++) { // skip SOH
result += (char) payload[b];
}
if (result == "ichatime.com")
{
final ImageView img = new ImageView(this);
Toast.makeText(getApplicationContext(), "Coupon collected!", Toast.LENGTH_SHORT).show();
if (storedPreference!=10)
{
storedPreference++;
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("storedInt", storedPreference);
img.setImageResource(images[storedPreference]);
}
if (storedPreference==10)
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setCancelable(false);
builder.setTitle("Redeem Your Coupon?");
builder.setInverseBackgroundForced(true);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
SharedPreferences preferences = getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("storedInt", 0); // value to store
editor.commit();
img.setImageResource(images[0]);
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
img.setImageResource(images[10]);
}
});
}
else
{
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("storedInt", 10);
img.setImageResource(images[10]);
}}
else
{
Toast.makeText(getApplicationContext(), "Wrong tag detected!", Toast.LENGTH_SHORT).show();
}
//Debugging Mode to see what is contained in the tags.
// Toast.makeText(getApplicationContext(), "Tag Contains " + result, Toast.LENGTH_SHORT).show();
}
}
}
}
Logcatエラー：
>11-26 01:16:11.869: D/AndroidRuntime(550): Shutting down VM
>
11-26 01:16:11.869: W/dalvikvm(550): threadid=1: thread exiting with uncaught exception (group=0x409c01f8)
>
11-26 01:16:11.929: I/dalvikvm(550): threadid=3: reacting to signal 3
>
11-26 01:16:11.979: E/AndroidRuntime(550): FATAL EXCEPTION: main
>
**11-26 01:16:11.979: E/AndroidRuntime(550): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ponpon/com.example.ponpon.MainActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ponpon/com.example.ponpon.CouponManager}: java.lang.ArrayIndexOutOfBoundsException: length=10; index=10**
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.access$600(ActivityThread.java:123)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.os.Handler.dispatchMessage(Handler.java:99)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.os.Looper.loop(Looper.java:137)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.main(ActivityThread.java:4424)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at java.lang.reflect.Method.invokeNative(Native Method)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at java.lang.reflect.Method.invoke(Method.java:511)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at dalvik.system.NativeStart.main(Native Method)
>
11-26 01:16:11.979: E/AndroidRuntime(550): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.ponpon/com.example.ponpon.CouponManager}: java.lang.ArrayIndexOutOfBoundsException: length=10; index=10
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1797)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:682)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.widget.TabHost.setCurrentTab(TabHost.java:346)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.widget.TabHost.addTab(TabHost.java:236)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at com.example.ponpon.MainActivity.onCreate(MainActivity.java:37)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.Activity.performCreate(Activity.java:4465)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
>
11-26 01:16:11.979: E/AndroidRuntime(550): ... 11 more
>
11-26 01:16:11.979: E/AndroidRuntime(550): Caused by: java.lang.ArrayIndexOutOfBoundsException: length=10; index=10
>
11-26 01:16:11.979: E/AndroidRuntime(550): at com.example.ponpon.CouponManager.onCreate(CouponManager.java:53)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.Activity.performCreate(Activity.java:4465)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
>
11-26 01:16:11.979: E/AndroidRuntime(550): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
>
11-26 01:16:11.979: E/AndroidRuntime(550): ... 21 more
アレイで何が間違っていましたか？明確化の人たちに感謝します！