java - 无法更改我的测验应用程序的问题
问题描述
我目前正在 android 中制作一个测验应用程序，但我的代码中有一个大问题，那就是它无法根据ArrayList.
假设当我单击ImageButton以检查文本视图是否等于给定单词时，我的代码应该更改问题。但是当我单击时ImageButton不起作用showMeNextQuestion()。
这是我的Quiz.java：
package com.example.activity.Main;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.speech.tts.TextToSpeech;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.UnderlineSpan;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.TextView;
import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import com.example.activity.R;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
public class quiz extends AppCompatActivity{
private ImageButton imageButton;
private File soundfile = null;
private GridView ll;
private ImageButton imageButton1;
private final ArrayList<String> buttonList = new ArrayList<>();
ArrayAdapter<String> adapter;
private TextView result , text_quiz;
String lessons,TextCompare,speakTextTxt,tempDestFile ;
HashMap<String, String> myHashRender = new HashMap<String, String>();
int qtotal;
private int counter=0;
private int cont = 1;
private int nextStartIndex=1;
TextView number;
List<String> word;
Boolean answered;
MediaPlayer mMediaPlayer = new MediaPlayer();
TextToSpeech mTts;
String word_to_use;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz);
number = findViewById(R.id.numberss);
imageButton = findViewById(R.id.icon1);
result = findViewById(R.id.result);
imageButton1 = findViewById(R.id.validate);
text_quiz = findViewById(R.id.text_quiz);
ll = findViewById(R.id.btnlay);
// ----------------------------------------------------------------------------------------------
Intent intent1 = getIntent();
final String ass = intent1.getStringExtra("lesson");
word = new LinkedList<String>(Arrays.asList(ass.split("_")));
Collections.shuffle(word);
qtotal= word.size();
// ----------------------------------------------------------------------------------------------
word_to_use = showmenextquestion();
start(word_to_use);
middle();
audio();
}
// end
// ----------------------------------------------------------------------------------------------
private void start(String word_to_use) {
String arr[] = word_to_use.split(" ",2);
String fword = arr[0];
String rword = arr[1];
String reprword = rword.replaceAll("[a-z]", "*");
final String text = fword + " " + reprword;
SpannableString firstword = new SpannableString(text);
firstword.setSpan(new UnderlineSpan(), 0, fword.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
result.setText(firstword);
final String [] display = result.getText().toString().split("\\s");
final String[] words = word_to_use.split("\\s");
final int noOfBtns = words.length;
final Button[] btns = new Button[noOfBtns];
for(int i=0;i<noOfBtns;i++)
{
buttonList.add(words[i]);
Collections.shuffle(buttonList);
ll.removeAllViewsInLayout();
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, buttonList)
{
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = null;
if(convertView == null)
{
row = super.getView(position,convertView,parent);
row.setBackgroundResource(R.drawable.btn_background);
}
return row;
}
};
ll.setAdapter(adapter);
ll.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position, long id) {
if(position < noOfBtns) {
String selectedItem = parent.getItemAtPosition(position).toString();
String s2 = text_quiz.getText().toString();
String [] s2_word = s2.split("\\s+");
List<String> str = new LinkedList<String>(Arrays.asList(s2_word));
if(str.remove(selectedItem))
{
StringBuilder builder = new StringBuilder();
for(String details: str)
{
builder.append(details + " ");
}
text_quiz.setText(builder.toString());
v.setBackgroundResource(R.drawable.btn_background);
}else {
v.setBackgroundResource(R.drawable.buttons4);
text_quiz.append(selectedItem + " ");
}
}
if (cont >= display.length) {
cont = 0;
nextStartIndex = 0;
}
result.setText(formatText(text, display[cont]));
cont++;
}
});
}
}
private void middle() {
imageButton1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String answer = showmenextquestion();
if(text_quiz.getText().toString().trim().equals(answer.trim()))
{
final AlertDialog.Builder builder = new AlertDialog.Builder(quiz.this);
builder.setTitle("Correct")
.setMessage("please click ok to continue until the end")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
if(counter < qtotal)
{
showmenextquestion();
}
else
{
finish();
}
}
}).show();
}else
{
AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
builder.setTitle("Incorrect");
builder.setMessage("There is no Words.");
builder.setCancelable(true);
final AlertDialog dlg = builder.create();
dlg.show();
Handler mHandler = new Handler();
Runnable mRunnable = new Runnable () {
public void run() {
if(dlg != null && dlg.isShowing()) dlg.dismiss();
}
};
mHandler.postDelayed(mRunnable,1500);
}
}
/*if(TextCompare.compareTo(answer) != 0)
{
new AlertDialog.Builder(quiz.this)
.setTitle("Correct")
.setMessage("please click ok to continue until the end")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
text_quiz.setText("");
ll.removeAllViewsInLayout();
start();
dialog.dismiss();
}
}).show();
}else
{
AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
builder.setTitle("Incorrect");
builder.setMessage("Your Answer is Incorrect.");
builder.setCancelable(true);
final AlertDialog dlg = builder.create();
dlg.show();
Handler mHandler = new Handler();
Runnable mRunnable = new Runnable () {
public void run() {
if(dlg != null && dlg.isShowing()) dlg.dismiss();
}
};
mHandler.postDelayed(mRunnable,2000);
text_quiz.setText("");
}*/
});
}
private void audio() {
speakTextTxt = showmenextquestion();
myHashRender.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, speakTextTxt);
String exStoragePath = "";
File appTmpPath = new File("/storage/emulated/0/Android/data/");
boolean isDirectoryCreated = appTmpPath.mkdir();
Log.d("MainActivity", "directory " + appTmpPath + " is created : " + isDirectoryCreated);
String tempFilename = "tts.wav";
tempDestFile = appTmpPath.getAbsolutePath() + File.separator + tempFilename;
Log.d("MainActivity", "tempDestFile : " + tempDestFile);
new MySpeech(speakTextTxt);
imageButton.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.M)
@Override
public void onClick(View v) {
final String path = "/storage/emulated/0/Android/data/tts.wav";
try {
mMediaPlayer.setDataSource(path);
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
} catch (IllegalStateException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
mMediaPlayer.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mMediaPlayer.setLooping(true);
if(!mMediaPlayer.isPlaying())
{
v.setBackgroundResource(R.drawable.ic_image_play);
mMediaPlayer.start();
}
else
{
v.setBackgroundResource(R.drawable.ic_stop_black);
mMediaPlayer.pause();
}
}
});
}
private String showmenextquestion() {
counter = 1;
if(counter < qtotal)
{
lessons = word.get(counter);
TextCompare = word.get(counter);
number.setText(counter + "/" + qtotal);
counter++;
}
return lessons;
}
class MySpeech implements TextToSpeech.OnInitListener {
String tts;
public MySpeech(String tts)
{
this.tts = tts;
mTts = new TextToSpeech(quiz.this, this);
}
@Override
public void onInit(int status)
{
Log.v("log", "initi");
int i = mTts.synthesizeToFile(speakTextTxt, myHashRender, tempDestFile);
}
}
public CharSequence formatText(String base, String highlight) {
int start = base.indexOf(highlight,nextStartIndex);
nextStartIndex = start+highlight.length();
SpannableString span = new SpannableString(base);
if (start >= 0) {
span.setSpan(new UnderlineSpan(), start, nextStartIndex, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
return span;
}
return base;
}
@Override
public void onBackPressed() {
mMediaPlayer.stop();
showmenextquestion();
}
}
现在这是我的quiz.xml：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/faded_background2"
tools:context=".Main.quiz">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline_left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="24dp" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline_right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_end="24dp" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/top1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
app:layout_constraintBottom_toTopOf="@id/top2"
app:layout_constraintEnd_toEndOf="@id/guideline_right"
app:layout_constraintStart_toStartOf="@id/guideline_left"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guide_left_inside_top1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="550dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<TextView
android:id="@+id/numberss"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="5dp"
android:gravity="center"
android:text="0/30"
android:textColor="#000000"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintStart_toStartOf="@id/guide_left_inside_top1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="@+id/top2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@drawable/buttons2"
app:layout_constraintBottom_toTopOf="@+id/text_quiz"
app:layout_constraintEnd_toEndOf="@id/guideline_right"
app:layout_constraintStart_toStartOf="@id/guideline_left"
app:layout_constraintTop_toBottomOf="@id/top1"
app:layout_constraintVertical_bias="0.144">
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guide_left_inside_constraint"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_begin="90dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guide_right_inside_constraint"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_end="30dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
<ImageButton
android:id="@+id/icon1"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:background="@drawable/buttons2"
android:src="@drawable/ic_image_play"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@id/guide_left_inside_constraint"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/result"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:padding="5dp"
android:gravity="center"
android:text="TextView"
android:textColor="@color/palette1"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintStart_toStartOf="@id/guide_left_inside_constraint"
app:layout_constraintEnd_toEndOf="@id/guide_right_inside_constraint"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
<TextView
android:id="@+id/text_quiz"
android:layout_width="0dp"
android:background="@drawable/buttons1"
android:layout_height="wrap_content"
android:padding="16dp"
android:textColor="@color/palette1"
android:gravity="center"
android:textSize="20sp"
android:textStyle="bold"
android:layout_marginTop="10dp"
app:layout_constraintStart_toStartOf="@id/guideline_left"
app:layout_constraintEnd_toStartOf="@id/guideline_right"
app:layout_constraintTop_toBottomOf="@+id/top2"/>
<GridView
android:id="@+id/btnlay"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:columnWidth="100dp"
android:gravity="center"
android:horizontalSpacing="16dp"
android:numColumns="7"
android:stretchMode="spacingWidthUniform"
android:verticalSpacing="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_quiz"
app:layout_constraintBottom_toTopOf="@id/footer_line"/>
<View
android:id="@+id/footer_line"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginBottom="50dp"
android:background="#000000"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
/>
<ImageButton
android:id="@+id/validate"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:src="@drawable/ic_check"
android:layout_marginTop="15dp"
android:background="@color/login_light"
app:layout_constraintStart_toStartOf="@id/guideline_left"
app:layout_constraintEnd_toStartOf="@id/guideline_right"
app:layout_constraintTop_toBottomOf="@+id/footer_line"
/>
<!--
/>
-->
</androidx.constraintlayout.widget.ConstraintLayout>
<!--
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Main.quiz">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingTop="50sp"
android:paddingLeft="20sp"
android:paddingRight="20sp">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/round_corners">
<ImageButton
android:id="@+id/icon1"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:background="@drawable/round_corners"
android:src="@drawable/ic_image_play"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="@+id/text_quess"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:text="TextView"
android:textColor="@color/p10"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.269"
app:layout_constraintStart_toEndOf="@+id/icon1"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<Button
android:id="@+id/text_quiz"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_marginTop="10dp"
android:background="@drawable/round_corners2"
android:text="TextView"
android:textStyle="bold"
android:textSize="25sp"
android:textColor="@color/p10"
android:layout_gravity="center"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/round_corners3"
android:layout_marginTop="35sp">
</LinearLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>-->
我的 xml 布局是横向的。请帮忙。谢谢你。
解决方案
变量 counter 的值在 if 循环中递增，但是当showmenextquestion()调用该函数时，计数器值再次分配给 1。所以它总是只显示第一个问题。因此，请使用该counter=1;函数的外部，即放置counter=1;在start()oraudio() 函数中。因此，每当应用程序启动时，计数器值将为 1，并且在showmenextquestion()调用该函数时它会递增。
private String showmenextquestion() {
if(counter < qtotal)
{
lessons = word.get(counter);
TextCompare = word.get(counter);
number.setText(counter + "/" + qtotal);
counter++;
}
return lessons;
}
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