简要说明:该应用程序将根据单词库文件中的单词向用户显示随机图像，用户必须识别图像的名称(单个单词)。用户可以通过单击传递按钮“传递”或识别图像，然后弹出“下一步”按钮将他们引导到下一个图像。
问题:
当我尝试按下下一个按钮时，应用程序在新的下一个按钮出现不同的图像之前一直崩溃。
我认为这与随机数生成器或我放置的 if 语句的问题有关。
我没有收到错误消息。我不确定是什么导致了这个问题。当我运行 apk 文件时，它崩溃时显示“不幸的是，图片已停止”
“pic”是应用程序名称。
编辑:
当我通过模拟器运行应用程序时，我收到一条运行时错误消息，如下所示
单击下一个按钮并更改为下一个由代码随机化的图像:
randomNum = (random.nextInt(UnSpokenList.size()) + 1);
第一个元素包含“Word Bank:”，它不是图像，它只是单词列表的名称，所以我做了 random.nextInt(maxsize)+1 ，我假设它避免了第一个元素 0，但是当它归结为数组列表的大小为 2
(它在这部分之前崩溃，但在单击下一个按钮时它也会崩溃。)
在
onActivityResult 函数中，当它的大小为 2 或小于 2 时，它将停止显示此下一个按钮并显示另一个调用函数 onlastPair 的下一个按钮，该函数根据数组列表的最后一个元素生成图像。主代码:
我从与问题无关的函数中删除了一些代码，希望可以更容易地找到主要问题。
public class Main extends Activity implements AdapterView.OnItemSelectedListener {
private static final int VR_Request = 100;
Button restart;
Button mainMenu;
Button pass;
Button next;
Button last2image;
TextView speechInput;
TextView matchOrNot;
TextView passTitle;
TextView counterDisplay;
String[] wordBank;
ArrayList<String> wordBANK;
Spinner wordList;
Spinner SpokenWords;
ArrayList<String> UnSpokenList;
ArrayList<String> SpokenList;
ArrayAdapter<String> wordList_adapter;
ArrayAdapter<String> SpokenList_adapter;
ImageButton speechBtn;
ImageView image;
Resources res;
int resID;
Random random;
int randomNum;
int previous;
int passCounter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pictionary);
speechInput = (TextView) findViewById(R.id.english_word1);
matchOrNot = (TextView) findViewById(R.id.matchOrNot1);
passTitle = (TextView) findViewById(R.id.passedTitle);
counterDisplay = (TextView) findViewById(R.id.passCounterText);
wordBank = getResources().getStringArray(R.array.Words);
speechBtn = (ImageButton) findViewById(R.id.mic_pic_button1);
wordBANK = new ArrayList<String>(Arrays.asList(wordBank));
image = (ImageView) findViewById(R.id.imageView1);
res = getResources();
restart = (Button) findViewById(R.id.restartButton1);
mainMenu = (Button) findViewById(R.id.mainMenubutton1);
pass = (Button) findViewById(R.id.passButton);
next = (Button) findViewById(R.id.nextButton);
last2image = (Button) findViewById(R.id.last2);
pass.setClickable(true);
wordList = (Spinner) findViewById(R.id.wordsList1);
SpokenWords = (Spinner) findViewById(R.id.spokenWords1);
UnSpokenList = new ArrayList<String>(Arrays.asList(wordBank));
SpokenList = new ArrayList<String>(wordBank.length+1);
UnSpokenList.add(0, "Word Bank:");
SpokenList.add(0,"Spoken Words:");
wordList_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, UnSpokenList);
wordList_adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
wordList.setAdapter(wordList_adapter);
SpokenList_adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, SpokenList);
SpokenList_adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
SpokenWords.setAdapter(SpokenList_adapter);
random = new Random();
randomNum = random.nextInt(UnSpokenList.size()-1);
resID = res.getIdentifier(UnSpokenList.get(randomNum), "drawable", getApplication().getPackageName());
image.setImageResource(resID);
pass.setClickable(true);
pass.setVisibility(View.VISIBLE);
next.setClickable(false);
next.setVisibility(View.INVISIBLE);
speechBtn.setClickable(true);
last2image.setVisibility(View.INVISIBLE);
last2image.setClickable(false);
passCounter = 0;
restart.setVisibility(View.INVISIBLE);
mainMenu.setVisibility(View.INVISIBLE);
passTitle.setVisibility(View.INVISIBLE);
counterDisplay.setVisibility(View.INVISIBLE);
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
parent.getItemAtPosition(position);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
public void onMicButton(View view) {
}
/**
* When the next button is pressed, this function handles the next random image to be displayed
* @param view
*/
public void onNext(View view){
if(view.getId() == R.id.nextButton){
speechInput.setText("");
matchOrNot.setText("");
randomNum = (random.nextInt(UnSpokenList.size()) + 1);
resID = res.getIdentifier(UnSpokenList.get(randomNum), "drawable", getApplication().getPackageName());
image.setImageResource(resID);
next.setClickable(false);
next.setVisibility(View.INVISIBLE);
pass.setClickable(true);
pass.setVisibility(View.VISIBLE);
speechBtn.setClickable(true);
}
}
/**
* This function occurs when the user plays all the way to last 2 image left in game
*/
public void onlastPair(View view){
if(view.getId() == R.id.last2){
if(!UnSpokenList.get(UnSpokenList.size()).contains("Word Bank:")) {
resID = res.getIdentifier(UnSpokenList.get(UnSpokenList.size()), "drawable", getApplication().getPackageName());
image.setImageResource(resID);
speechBtn.setClickable(true);
pass.setClickable(false);
pass.setVisibility(View.INVISIBLE);
}else {
onGameOver();
}
}
}
public void onGameOver(){
}
/**
* when the user clicks the passed button this function is called.
* It takes the previous image and make sure it does not pop-up again for the next image and then reproduce a different image
* @param view
*/
public void onPass(View view){
}
public void onResetPic(View view){
}
public void reset(){
}
public void MainMenu(View view){
}
/**
* shows speech input dialog
*/
public void promptSpeechInput() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.ACTION_RECOGNIZE_SPEECH, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, Locale.getDefault());
intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Say a Word from our word bank!");
try {
startActivityForResult(intent, VR_Request);
} catch (ActivityNotFoundException a) {
Toast.makeText(Pictionary.this, "Oops, your device doesn't support speech recognition,", Toast.LENGTH_LONG).show();
}
}
/**
* detects and recieve speech input
* @param requestCode
* @param resultCode
* @param intent
*/
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if(requestCode == VR_Request && resultCode == RESULT_OK) {
ArrayList<String> result = intent.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
if(wordBANK.contains(result.get(0).toLowerCase()) && UnSpokenList.get(randomNum).contains(result.get(0).toLowerCase())){
speechInput.setText(result.get(0).toUpperCase());
matchOrNot.setTextColor(Color.GREEN);
matchOrNot.setText("CORRECT!");
UnSpokenList.remove(result.get(0).toLowerCase());
SpokenList.add(result.get(0).toLowerCase());
pass.setClickable(false);
pass.setVisibility(View.INVISIBLE);
speechBtn.setClickable(false);
if(UnSpokenList.size() > 3){
next.setClickable(true);
next.setVisibility(View.VISIBLE);
}else{
last2image.setVisibility(View.VISIBLE);
last2image.setClickable(true);
}
}else{
speechInput.setText("");
matchOrNot.setTextColor(Color.RED);
matchOrNot.setText("TRY AGAIN!");
pass.setVisibility(View.VISIBLE);
pass.setClickable(true);
}
}
super.onActivityResult(requestCode, resultCode, intent);
}
}
有任何想法吗？先感谢您!
编辑:错误消息:
每次按下 last2image 按钮时都会出现此错误消息，并给出崩溃消息:“不幸的是，图片已停止运行”
08-17 15:58:31.083 13036-13036/com.example.speechtotext E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.speechtotext, PID: 13036
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.view.View$DeclaredOnClickListener.onClick(View.java:4452)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4447)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IndexOutOfBoundsException: Invalid index 3, size is 3
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at com.example.speechtotext.Main.onlastPair(Main.java:222)
at java.lang.reflect.Method.invoke(Native Method)
at android.view.View$DeclaredOnClickListener.onClick(View.java:4447)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
08-17 15:58:33.495 13036-13036/com.example.speechtotext I/Process: Sending signal. PID: 13036 SIG: 9
08-17 15:58:33.966 17345-17345/com.example.speechtotext W/System: ClassLoader referenced unknown path: /data/app/com.example.speechtotext-2/lib/x86
08-17 15:58:34.302 17345-17345/com.example.speechtotext W/System: ClassLoader referenced unknown path: /data/app/com.example.speechtotext-2/lib/x86
08-17 15:58:34.673 17345-17345/com.example.speechtotext W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
08-17 15:58:34.748 17345-17386/com.example.speechtotext D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
[ 08-17 15:58:34.759 17345:17345 D/ ]
HostConnection::get() New Host Connection established 0xaa23f4c0, tid 17345
08-17 15:58:34.828 17345-17386/com.example.speechtotext I/OpenGLRenderer: Initialized EGL, version 1.4
08-17 15:58:34.885 17345-17386/com.example.speechtotext W/EGL_emulation: eglSurfaceAttrib not implemented
08-17 15:58:34.888 17345-17386/com.example.speechtotext W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xaa23e540, error=EGL_SUCCESS
单击按钮时运行的函数是 onlastPair() 函数，
public void onlastPair(View view){
if(view.getId() == R.id.last2){
if(!UnSpokenList.get(UnSpokenList.size()).contains("Word Bank:")) {
resID = res.getIdentifier(UnSpokenList.get(UnSpokenList.size()), "drawable", getApplication().getPackageName());
image.setImageResource(resID);
speechBtn.setClickable(true);
pass.setClickable(false);
pass.setVisibility(View.INVISIBLE);
}else {
onGameOver();
}
}
}
最初将错误消息定向到以下两行作为错误的一部分:
if(!UnSpokenList.get(UnSpokenList.size()).contains("Word Bank:")) {
resID = res.getIdentifier(UnSpokenList.get(UnSpokenList.size()), "drawable", getApplication().getPackageName());
所以我决定改变如下所示的功能，
public void onlastPair(View view){
if(view.getId() == R.id.last2){
if(!UnSpokenList.get(1).isEmpty()) {
int max = UnSpokenList.size();
resID = res.getIdentifier(UnSpokenList.get(max), "drawable", getApplication().getPackageName());
image.setImageResource(resID);
speechBtn.setClickable(true);
pass.setClickable(false);
pass.setVisibility(View.INVISIBLE);
}else {
onGameOver();
}
}
}
但这次它仍然给我一个错误，它指向这条线:
int max = UnSpokenList.size();
我不确定它出了什么问题，也许这是我的逻辑，但对我来说似乎有意义或我缺少某些东西。任何想法都会有所帮助，谢谢!
最佳答案
randomNum = (random.nextInt(UnSpokenList.size()) + 1); 不正确nextInt(15) 给出#0-14
如果您的 UnSpokenList.size() == 15，则意味着它具有 0-14 的索引
所以如果你做 random.nextInt(UnSpokenList.size()) + 1) 你实际上是在寻找数字，15+1，这将是从 0-15
15 将超出您的 0-14 指数
忽略你的 UnSpokenList(0) ...
您需要将其更改为:random.nextInt(UnSpokenList.size() - 1) + 1
大小 15-1 将 rng 0-13，然后 +1，将使其成为 1-14，这非常适合 UnSpokenList(1) - UnSpokenList(14)
我们可以测试 UnSpokenList.size() = 2random.nextInt(2 - 1) + 1 = only-0 + 1 = only-1
编辑 if(!UnSpokenList.get(1).isEmpty()) 您是否要检查您的列表是否有超过 1 个项目？如果是这样，你的可以抛出索引错误，它应该是 if (UnSpokenList.size() > 1)
然后再一次，int max = UnSpokenList.size() ... UnSpokenList.get(max) 你给它的索引越界，0-14 但你得到(15)，它不会工作
关于android - 使用随机数生成从数组列表中显示图像，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38988942/