我正在接受捐款的移动应用上制作活动。我使用DonationsFragment作为指南。我试图用EditText替换上面例子中使用的Spinner，以便捐赠者可以输入要捐赠的值。
以下是我的源代码：
public class DonateFragment extends Fragment {
public static final String ARG_DEBUG = "debug";
public static final String ARG_GOOGLE_ENABLED = "googleEnabled";
public static final String ARG_GOOGLE_PUBKEY = "googlePubkey";
public static final String ARG_GOOGLE_CATALOG = "googleCatalog";
public static final String ARG_GOOGLE_CATALOG_VALUES = "googleCatalogValues";
private static final String TAG = "Donations Library";
// http://developer.android.com/google/play/billing/billing_testing.html
private static final String[] CATALOG_DEBUG = new String[]{"android.test.purchased",
"android.test.canceled", "android.test.refunded", "android.test.item_unavailable"};
private EditText mGoogleEditText;
private Spinner mGoogleSpinner;
// Google Play helper object
private IabHelper mHelper;
protected boolean mDebug = false;
protected boolean mGoogleEnabled = false;
protected String mGooglePubkey = "";
protected String[] mGoogleCatalog = new String[]{};
protected String[] mGoogleCatalogValues = new String[]{};
/**
* Instantiate DonationsFragment.
*
* @param debug You can use BuildConfig.DEBUG to propagate the debug flag from your app to the Donations library
* @param googleEnabled Enabled Google Play donations
* @param googlePubkey Your Google Play public key
* @param googleCatalog Possible item names that can be purchased from Google Play
* @param googleCatalogValues Values for the names
* @return DonationsFragment
*/
public static DonateFragment newInstance(boolean debug, boolean googleEnabled, String googlePubkey, String[] googleCatalog,
String[] googleCatalogValues) {
DonateFragment donateFragment = new DonateFragment();
Bundle args = new Bundle();
args.putBoolean(ARG_DEBUG, debug);
args.putBoolean(ARG_GOOGLE_ENABLED, googleEnabled);
args.putString(ARG_GOOGLE_PUBKEY, googlePubkey);
args.putStringArray(ARG_GOOGLE_CATALOG, googleCatalog);
args.putStringArray(ARG_GOOGLE_CATALOG_VALUES, googleCatalogValues);
donateFragment.setArguments(args);
return donateFragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDebug = getArguments().getBoolean(ARG_DEBUG);
mGoogleEnabled = getArguments().getBoolean(ARG_GOOGLE_ENABLED);
mGooglePubkey = getArguments().getString(ARG_GOOGLE_PUBKEY);
mGoogleCatalog = getArguments().getStringArray(ARG_GOOGLE_CATALOG);
mGoogleCatalogValues = getArguments().getStringArray(ARG_GOOGLE_CATALOG_VALUES);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.donatefraggoogle, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
/* Google */
if (mGoogleEnabled) {
// inflate google view into stub
ViewStub googleViewStub = (ViewStub) getActivity().findViewById(R.id.vwsGoogle);
googleViewStub.inflate();
// choose donation amount
mGoogleEditText = (EditText) getActivity().findViewById(R.id.txtDonate);
Button btGoogle = (Button) getActivity().findViewById(R.id.donations__google_android_market_donate_button);
btGoogle.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
donateGoogleOnClick(v);
}
});
// Create the helper, passing it our context and the public key to verify signatures with
if (mDebug)
Log.d(TAG, "Creating IAB helper.");
mHelper = new IabHelper(getActivity(), mGooglePubkey);
// enable debug logging (for a production application, you should set this to false).
mHelper.enableDebugLogging(mDebug);
// Start setup. This is asynchronous and the specified listener
// will be called once setup completes.
if (mDebug)
Log.d(TAG, "Starting setup.");
mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
public void onIabSetupFinished(IabResult result) {
if (mDebug)
Log.d(TAG, "Setup finished.");
if (!result.isSuccess()) {
// Oh noes, there was a problem.
openDialog(android.R.drawable.ic_dialog_alert, R.string.donations__google_android_market_not_supported_title,
getString(R.string.donations__google_android_market_not_supported));
return;
}
// Have we been disposed of in the meantime? If so, quit.
if (mHelper == null) return;
}
});
}
}
/**
* Open dialog
*/
void openDialog(int icon, int title, String message) {
AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());
dialog.setIcon(icon);
dialog.setTitle(title);
dialog.setMessage(message);
dialog.setCancelable(true);
dialog.setNeutralButton(R.string.donations__button_close,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}
);
dialog.show();
}
/**
* Donate button executes donations based on selection in spinner
*/
public void donateGoogleOnClick(View view) {
String strDonation;
strDonation = mGoogleEditText.getText().toString();
if (mDebug)
Log.d(TAG, "selected item in spinner: " + strDonation);
if (mDebug) {
// when debugging, choose android.test.x item
mHelper.launchPurchaseFlow(getActivity(),
strDonation, IabHelper.ITEM_TYPE_INAPP,
0, mPurchaseFinishedListener, null);
} else {
mHelper.launchPurchaseFlow(getActivity(),
strDonation, IabHelper.ITEM_TYPE_INAPP,
0, mPurchaseFinishedListener, null);
}
}
// Callback for when a purchase is finished
IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener = new IabHelper.OnIabPurchaseFinishedListener() {
public void onIabPurchaseFinished(IabResult result, Purchase purchase) {
if (mDebug)
Log.d(TAG, "Purchase finished: " + result + ", purchase: " + purchase);
// if we were disposed of in the meantime, quit.
if (mHelper == null) return;
if (result.isSuccess()) {
if (mDebug)
Log.d(TAG, "Purchase successful.");
// directly consume in-app purchase, so that people can donate multiple times
mHelper.consumeAsync(purchase, mConsumeFinishedListener);
// show thanks openDialog
openDialog(android.R.drawable.ic_dialog_info, R.string.donations__thanks_dialog_title,
getString(R.string.donations__thanks_dialog));
}
}
};
// Called when consumption is complete
IabHelper.OnConsumeFinishedListener mConsumeFinishedListener = new IabHelper.OnConsumeFinishedListener() {
public void onConsumeFinished(Purchase purchase, IabResult result) {
if (mDebug)
Log.d(TAG, "Consumption finished. Purchase: " + purchase + ", result: " + result);
// if we were disposed of in the meantime, quit.
if (mHelper == null) return;
if (result.isSuccess()) {
if (mDebug)
Log.d(TAG, "Consumption successful. Provisioning.");
}
if (mDebug)
Log.d(TAG, "End consumption flow.");
}
};
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (mDebug)
Log.d(TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);
if (mHelper == null) return;
// Pass on the fragment result to the helper for handling
if (!mHelper.handleActivityResult(requestCode, resultCode, data)) {
// not handled, so handle it ourselves (here's where you'd
// perform any handling of activity results not related to in-app
// billing...
super.onActivityResult(requestCode, resultCode, data);
} else {
if (mDebug)
Log.d(TAG, "onActivityResult handled by IABUtil.");
}
}
}
当我在手机上测试时点击“捐赠”按钮，它崩溃了，我在LogCat中收到以下消息：
09-09 13:37:09.626: E/AndroidRuntime(7707): FATAL EXCEPTION: main
09-09 13:37:09.626: E/AndroidRuntime(7707): Process: com.danielburgnerjr.flipulatorfree, PID: 7707
09-09 13:37:09.626: E/AndroidRuntime(7707): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.danielburgnerjr.flipulatorfree/com.danielburgnerjr.flipulatorfree.DonateActivity}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2413)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2471)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread.access$900(ActivityThread.java:175)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1308)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.os.Handler.dispatchMessage(Handler.java:102)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.os.Looper.loop(Looper.java:146)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread.main(ActivityThread.java:5602)
09-09 13:37:09.626: E/AndroidRuntime(7707): at java.lang.reflect.Method.invokeNative(Native Method)
09-09 13:37:09.626: E/AndroidRuntime(7707): at java.lang.reflect.Method.invoke(Method.java:515)
09-09 13:37:09.626: E/AndroidRuntime(7707): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
09-09 13:37:09.626: E/AndroidRuntime(7707): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
09-09 13:37:09.626: E/AndroidRuntime(7707): at dalvik.system.NativeStart.main(Native Method)
09-09 13:37:09.626: E/AndroidRuntime(7707): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
09-09 13:37:09.626: E/AndroidRuntime(7707): at com.danielburgnerjr.flipulatorfree.DonateFragment.onActivityCreated(DonateFragment.java:105)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1508)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:570)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1177)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.Activity.performStart(Activity.java:5461)
09-09 13:37:09.626: E/AndroidRuntime(7707): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2386)
09-09 13:37:09.626: E/AndroidRuntime(7707): ... 11 more
有什么我忽略的吗？
答案 0 :(得分：0)
首先，感谢您的评论。我能够纠正原始问题只是为了弹出另一个问题。我把这一行移到了onCreateView（）：
mGoogleEditText = (EditText) getActivity().findViewById(R.id.txtDonate);
并将onCreateView（）重写为：
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// choose donation amount
View viewV = (ViewGroup) inflater.inflate(R.layout.donatefraggoogle, container, false);
mGoogleEditText = (EditText) viewV.findViewById(R.id.edtDonate);
return viewV;
}
我注意到txtDonate被列为TextView（在activity_donate.xml中）和EditText（在donatefraggoogle.xml中）。我将EditText txtDonate重命名为edtDonate。
至于弹出的另一个问题，我注意到通过Google Play商店处理捐款的viewStub正在显示两次。