如何解决当文本在一种颜色切换活动中完全突出显示时
我正在重新创建一个用于教育目的的打字应用程序。目标是键入段落中的单词。当一个词正确时，该词变为绿色，editText 字段被清除，其下一个词变为。最后，每个单词都是绿色的，然后应用程序崩溃，因为 Activity 正在寻找下一个变为绿色的单词，但没有找到任何东西。
你知道我如何在最后停止“搜索”吗？我想说：
if（“写的字”等于“应该写的文本的字”）
然后，结束对 editText 字段的关注并显示分数“成功”。
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_paragraph_game);
paragraphTextView = findViewById(R.id.txtParagraph);
edtInput = findViewById(R.id.edtTextWriter);
timerView = findViewById(R.id.txtTimer);
edtInput.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
//Sofortiger Fokus auf Textfeld
edtInput.requestFocus();
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(edtInput,InputMethodManager.SHOW_IMPLICIT);
try {
refreshParagraph();
} catch (IOException e) {
e.printstacktrace();
}
setTitle(getString(R.string.paragraph_title));
edtInput.addTextChangedListener(this);
}
@Override
public void beforeTextChanged(CharSequence s,int start,int count,int after) {
//empty method
}
@Override
public void onTextChanged(CharSequence s,int before,int count) {
//vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv//
if (s.toString().replace(" ","").equals(wordList.get(wordindex))) {
inputClean = true;
numberOfLetters += s.length();
wordindex++;
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^//
}
}
}
@Override
public void afterTextChanged(Editable s) {
if (inputClean) {
inputClean = false;
edtInput.setText("");
updateColor(paragraphTextView,paragraphInitializer.getNextIndex(wordindex - 1));
} else if (!wordList.get(wordindex).contains(s.toString().replace(" ",""))) {
undoColorChange(paragraphTextView,paragraphInitializer.getCurrentIndex(),paragraphInitializer.lookaheadindex(wordindex));
}
}
protected void refreshParagraph() throws IOException {
paragraphInitializer = new ParagraphInitializer(this);
String paragraph = paragraphInitializer.getRandomParagraph();
wordList = paragraphInitializer.getWords(paragraph);
paragraphTextView.setText(paragraph,TextView.BufferType.SPANNABLE);
inputClean = false;
wordindex = 0;
numberOfWords = paragraphInitializer.getWordCount();
countDownTimer = new CountDownTimer(Constants.MILLIS_IN_FUTURE,Constants.COUNTDOWN_INTERVAL) {
@SuppressLint("SetTextI18n")
@Override
public void onTick(long millisUntilFinished) {
timerView.setText("00:" + millisUntilFinished / 1000);
if ((millisUntilFinished / 1000) < 16)
timerView.setTextColor(Color.rgb(255,34,34));
}
@Override
public void onFinish() {
timerView.setText(getString(R.string.zero));
edtInput.setEnabled(false);
//initializeResultDialog();
//pushFirebaseValues();
//Intent intent = new Intent(ParagraphGameActivity.this,ResultParagraphActivity.class);
//startActivity(intent);
}
}.start();
}
private void updateColor(TextView paragraphTextView,int nextIndex) {
Spannable wordToSpan = new SpannableString(paragraphTextView.getText());
//Neu einfärben in Grün
wordToSpan.setSpan(new ForegroundColorSpan(Color.rgb(59,226,8)),nextIndex,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
paragraphTextView.setText(wordToSpan);
}
private void undoColorChange(TextView paragraphTextView,int currentIndex,int lookaheadindex) {
Spannable wordToSpan = new SpannableString(paragraphTextView.getText());
//Neu einfärben falls Falsch
wordToSpan.setSpan(new ForegroundColorSpan(Color.rgb(226,8,currentIndex,lookaheadindex,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
paragraphTextView.setText(wordToSpan);
}
private void pushFirebaseValues() {
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference(Constants.USER_score);
String userName = getSharedPreferences(Constants.USER_PREFERENCE,Context.MODE_PRIVATE).getString(Constants.USER_NICK,getString(R.string.OK));
User user = new User(userName,numberOfLetters / 5,numberOfLetters,false);
if (userName != null) {
databaseReference.child(userName).setValue(user);
} else {
//DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference(Constants.USER_score);
Query query = databaseReference.orderByChild("score-list");
query.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot resultsSnapshot) {
for (DataSnapshot usersnapshot : resultsSnapshot.getChildren()) {
User user = new User(userName,false);
usersnapshot.getRef().setValue(user);
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
throw databaseError.toException();
}
});
}
}
}
vvvvvvvvvv
this line
^^^^^^^^^^
感谢您的帮助！ :)
----------- 这里是完整的 logcat --------------
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.myapplication,PID: 21599
java.lang.indexoutofboundsexception: Index: 8,Size: 8
at java.util.ArrayList.get(ArrayList.java:437)
at com.example.myapplication.ParagraphGameActivity.onTextChanged(ParagraphGameActivity.java:76)
at android.widget.TextView.sendOnTextChanged(TextView.java:11785)
at android.widget.TextView.setText(TextView.java:6965)
at android.widget.TextView.setText(TextView.java:6761)
at android.widget.EditText.setText(EditText.java:145)
at android.widget.TextView.setText(TextView.java:6713)
at com.example.myapplication.ParagraphGameActivity.afterTextChanged(ParagraphGameActivity.java:88)
at android.widget.TextView.sendAfterTextChanged(TextView.java:11816)
at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:15266)
at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:1287)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:587)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:517)
at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:38)
at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:867)
at android.view.inputmethod.BaseInputConnection.commitText(BaseInputConnection.java:199)
at com.android.internal.widget.EditableInputConnection.commitText(EditableInputConnection.java:177)
at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:345)
at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:93)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:246)
at android.app.ActivityThread.main(ActivityThread.java:8512)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
问候
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