【发布时间】：2016-12-23 15:46:52
【问题描述】：
简要说明：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，并且用户必须识别图像的名称（单个单词）。用户可以通过单击通过按钮“通过”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以不同的图像出现之前一直崩溃。
我认为这与随机数生成器或我放置的 if 语句有关。
我没有收到任何错误消息。我不确定是什么导致了这个问题。当我运行apk文件时，当它崩溃时它说“不幸的是，图片已停止” “pic”是应用名称。
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由代码随机化的下一个图像：
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 , 但归结为 arraylist 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一个不同的下一个按钮，该按钮调用函数 onlastPair，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，希望它会更容易找到主要问题。
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);
}
}
有什么想法吗？提前谢谢！
编辑：错误消息： 每次我按下 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
点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();
}
}
}
但现在它仍然给我一个错误，这次它指向了这条线：
int max = UnSpokenList.size();
我不确定它出了什么问题，也许这是我的逻辑，但它似乎对我有意义或我缺少什么。任何想法都会有所帮助，谢谢！
【问题讨论】：
-
如果您收到类似“不幸的是，图片已停止”的弹出窗口，则您的应用程序已崩溃。发生这种情况时，logcat 中总是会弹出一个弹出窗口。请分享一下
-
补充：你不能总是使用这个
randomNum = (random.nextInt(UnSpokenList.size()) + 1);。nextInt()将返回一个介于 0 和 max - 1 之间的数字。因为您的最大值是一个列表，所以您可以获得一个代表列表中最后一项的数字。但是，您正在增加此值，这意味着您可能会得到IndexOutOfBoundException，因为列表是从 0 开始的 -
原来我没有，通过模拟器运行，但是当我这样做时，我得到了帖子中显示的错误消息
标签： android arraylist random android-image