如何解决有关分数的错误并继续到下一轮的Android一般知识问答？ [英] how to solve errors related to scores and proceed to next round in android general knowledge quiz?
本文介绍了如何解决有关分数的错误并继续到下一轮的Android一般知识问答？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我工作在Android测验。当我在模拟器中运行它的第一个问题出现，我回答。它停止工作。然后，从开始重新启动。我不知道在哪里我的code的问题。
i am working on android quiz. when i run it on emulator first question appear and i answer it. its stopped working. and then restart from start. i dont know where's problem in my code.
questionactivity.class
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class QuestionActivity extends Activity implements OnClickListener{
private Question currentQ;
private GamePlay currentGame;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.question);
/**
* Configure current game and get question
*/
currentGame = ((CYKApplication)getApplication()).getCurrentGame();
currentQ = currentGame.getNextQuestion();
Button nextBtn1 = (Button) findViewById(R.id.answer1);
nextBtn1.setOnClickListener(this);
Button nextBtn2 = (Button) findViewById(R.id.answer2);
nextBtn2.setOnClickListener(this);
Button nextBtn3 = (Button) findViewById(R.id.answer3);
nextBtn3.setOnClickListener(this);
Button nextBtn4 = (Button) findViewById(R.id.answer4);
nextBtn4.setOnClickListener(this);
/**
* Update the question and answer options..
*/
setQuestions();
}
/**
* Method to set the text for the question and answers from the current games
* current question
*/
private void setQuestions() {
//set the question text from current question
String question = Utility.capitalise(currentQ.getQuestion());
TextView qText = (TextView) findViewById(R.id.question);
qText.setText(question);
//set the available options
List<String> answers = currentQ.getQuestionOptions();
TextView option1 = (TextView) findViewById(R.id.answer1);
option1.setText(Utility.capitalise(answers.get(0)));
TextView option2 = (TextView) findViewById(R.id.answer2);
option2.setText(Utility.capitalise(answers.get(1)));
TextView option3 = (TextView) findViewById(R.id.answer3);
option3.setText(Utility.capitalise(answers.get(2)));
TextView option4 = (TextView) findViewById(R.id.answer4);
option4.setText(Utility.capitalise(answers.get(3)));
}
@Override
public void onClick(View arg0) {
//Log.d("Questions", "Moving to next question");
if(!checkAnswer()) return;
/**
* check if end of game
*/
if (currentGame.isGameOver()){
//Log.d("Questions", "End of game! lets add up the scores..");
//Log.d("Questions", "Questions Correct: " + currentGame.getRight());
//Log.d("Questions", "Questions Wrong: " + currentGame.getWrong());
Intent i = new Intent(this, EndgameActivity.class);
startActivity(i);
finish();
}
else{
Intent i = new Intent(this, QuestionActivity.class);
startActivity(i);
finish();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
switch (keyCode)
{
case KeyEvent.KEYCODE_BACK :
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* Check if a checkbox has been selected, and if it
* has then check if its correct and update gamescore
*/
private boolean checkAnswer() {
String answer = getSelectedAnswer();
if (currentQ.getAnswer().equalsIgnoreCase(answer))
{
//Log.d("Questions", "Correct Answer!");
currentGame.incrementScore();
}
else{
//Log.d("Questions", "Incorrect Answer!");
currentGame.decrementScore();
}
return true;
}
/**
*
*/
private String getSelectedAnswer() {
Button c1 = (Button)findViewById(R.id.answer1);
Button c2 = (Button)findViewById(R.id.answer2);
Button c3 = (Button)findViewById(R.id.answer3);
Button c4 = (Button)findViewById(R.id.answer4);
if (c1.callOnClick())
{
return c1.getText().toString();
}
if (c2.callOnClick())
{
return c2.getText().toString();
}
if (c3.callOnClick())
{
return c3.getText().toString();
}
if (c4.callOnClick())
{
return c4.getText().toString();
}
return null;
}
}
日志输出：
09-02 08:17:30.083: E/Trace(2148): error opening trace file: No such file or directory (2)
09-02 08:17:30.193: D/dalvikvm(2148): GC_FOR_ALLOC freed 65K, 8% free 2413K/2620K, paused 26ms, total 28ms
09-02 08:17:30.203: I/dalvikvm-heap(2148): Grow heap (frag case) to 4.553MB for 2160016-byte allocation
09-02 08:17:30.313: D/dalvikvm(2148): GC_FOR_ALLOC freed 1K, 5% free 4521K/4732K, paused 104ms, total 104ms
09-02 08:17:30.363: D/dalvikvm(2148): GC_CONCURRENT freed <1K, 5% free 4521K/4732K, paused 4ms+3ms, total 50ms
09-02 08:17:30.832: D/gralloc_goldfish(2148): Emulator without GPU emulation detected.
09-02 08:17:35.432: D/dalvikvm(2148): GC_FOR_ALLOC freed 17K, 4% free 4988K/5148K, paused 42ms, total 45ms
09-02 08:17:35.482: I/dalvikvm-heap(2148): Grow heap (frag case) to 7.068MB for 2160016-byte allocation
09-02 08:17:35.562: D/dalvikvm(2148): GC_CONCURRENT freed 4K, 3% free 7092K/7260K, paused 4ms+4ms, total 77ms
09-02 08:17:36.512: I/Choreographer(2148): Skipped 764 frames! The application may be doing too much work on its main thread.
09-02 08:17:38.682: I/dalvikvm(2148): threadid=1: stack overflow on call to Landroid/view/View;.findViewById:LI
09-02 08:17:38.682: I/dalvikvm(2148): method requires 12+20+8=40 bytes, fp is 0x4205a320 (32 left)
09-02 08:17:38.682: I/dalvikvm(2148): expanding stack end (0x4205a300 to 0x4205a000)
09-02 08:17:38.682: I/dalvikvm(2148): Shrank stack (to 0x4205a300, curFrame is 0x4205fec4)
09-02 08:17:38.682: D/AndroidRuntime(2148): Shutting down VM
09-02 08:17:38.682: W/dalvikvm(2148): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
09-02 08:17:39.092: E/AndroidRuntime(2148): FATAL EXCEPTION: main
09-02 08:17:39.092: E/AndroidRuntime(2148): java.lang.StackOverflowError
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.ViewGroup.findViewTraversal(ViewGroup.java:3053)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.findViewById(View.java:15104)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.ViewGroup.findViewTraversal(ViewGroup.java:3053)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.findViewById(View.java:15104)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.ViewGroup.findViewTraversal(ViewGroup.java:3053)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.findViewById(View.java:15104)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.ViewGroup.findViewTraversal(ViewGroup.java:3053)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.findViewById(View.java:15104)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.Window.findViewById(Window.java:900)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.app.Activity.findViewById(Activity.java:1839)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:144)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.starchazer.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.View.callOnClick(View.java:4222)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.getSelectedAnswer(QuestionActivity.java:148)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.checkAnswer(QuestionActivity.java:126)
09-02 08:17:39.092: E/AndroidRuntime(2148): at com.cyk.QuestionActivity.onClick(QuestionActivity.java:85)
09-02 08:17:39.092: E/AndroidRuntime(2148): at android.view.V
09-02 08:17:39.122: D/dalvikvm(2148): GC_CONCURRENT freed 762K, 11% free 7907K/8812K, paused 69ms+5ms, total 117ms
09-02 08:17:39.122: D/dalvikvm(2148): WAIT_FOR_CONCURRENT_GC blocked 16ms
09-02 08:22:39.222: I/Process(2148): Sending signal. PID: 2148 SIG: 9
09-02 08:22:39.783: E/Trace(2182): error opening trace file: No such file or directory (2)
09-02 08:22:39.883: D/dalvikvm(2182): GC_FOR_ALLOC freed 68K, 9% free 2413K/2624K, paused 25ms, total 27ms
09-02 08:22:39.893: I/dalvikvm-heap(2182): Grow heap (frag case) to 4.553MB for 2160016-byte allocation
09-02 08:22:40.013: D/dalvikvm(2182): GC_FOR_ALLOC freed 1K, 5% free 4521K/4736K, paused 114ms, total 114ms
09-02 08:22:40.063: D/dalvikvm(2182): GC_CONCURRENT freed <1K, 5% free 4521K/4736K, paused 4ms+3ms, total 49ms
09-02 08:22:40.513: D/gralloc_goldfish(2182): Emulator without GPU emulation detected.
当我删除调用checkAnswer（）从法的onClick（）方法，我的游戏作品。但后来我的游戏没有检查我的答案对还是错。在另一方面，如果我不删除调用此方法。我的游戏作品，并回答第一个问题，我的应用程序停止工作，并重新启动后。有人可以帮我找到的错误在我的code？
when i remove call to checkAnswer() method from onClick() method my game work. but then my game not check my answer right or wrong. on the other hand if i am not remove call to this method. my game works and after answering first question my app stop working and restart. can someone help me to find error in my code?
推荐答案
的onClick 为您提供单击的视图（将arg0 在code），所以传递到你的 checkAnswer 方法。然后在 checkAnswer （或 getSelectedAnswer ），你可以简单地检查被单击视图，并直接用它来验证答案。
onClick provides you with the view that was clicked (arg0 in your code), so pass that to your checkAnswer method. Then in checkAnswer (or getSelectedAnswer) you can simply check which view was clicked and use it directly to validate the answer.
您现在使用的方法可能导致某种递归的，因为你调用的onClick 在 getSelectedAnswer 每个按钮而导致堆栈溢出。
The method you use now is probably causing some kind of recursion because you invoke onClick for each button in getSelectedAnswer and that results in a stack overflow.
编辑：例如code（未经测试）来说明这个想法
example code (untested) to illustrate the idea
@Override
public void onClick(View arg0) {
// NEW: pass the received view to checkAnswer
if(!checkAnswer(arg0)) return;
if (currentGame.isGameOver()){
//Log.d("Questions", "End of game! lets add up the scores..");
//Log.d("Questions", "Questions Correct: " + currentGame.getRight());
//Log.d("Questions", "Questions Wrong: " + currentGame.getWrong());
Intent i = new Intent(this, EndgameActivity.class);
startActivity(i);
finish();
}
else{
Intent i = new Intent(this, QuestionActivity.class);
startActivity(i);
finish();
}
}
// NEW: add view as argument to checkAnswer
private boolean checkAnswer(View v) {
// NEW: retrieve answer from clicked view
Button b = (Button)v;
String answer = b.getText().toString();
// now check if the answer is correct
if (currentQ.getAnswer().equalsIgnoreCase(answer)) {
//Log.d("Questions", "Correct Answer!");
currentGame.incrementScore();
}
else {
//Log.d("Questions", "Incorrect Answer!");
currentGame.decrementScore();
}
return true;
}
由于我不知道究竟你的应用程序是如何布局，我假设在这里，你有四个按钮，每个设置，因为它的标题一个答案。什么上面的code的作用是获取被点击的观点，并提取它的标题（文本），然后检查，对正确的答案。当然，既然你也可以不会点击你可能需要检查是否点击的观点确实是一个按钮一个按钮，如果你不应该跳过答案检查 - 我省略了这在本例中code以上。
Since I don't exactly know how your app is laid out, I am assuming here that you have four "buttons", each with an answer set as it's caption. What the code above does is retrieve the view that was clicked and extract it's caption (text), then checks that against the correct answer. Of course since you could also NOT click one of the buttons you will probably need to check if the clicked view is indeed one of the buttons, and if not you should skip the answer checking - I have omitted this in the example code above.
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