我在Android Java编程方面遇到了一些问题。
这是我的情况:
ArrayList
。我不知道如何解决这个问题。此外,我无法从logcat获得错误,非常奇怪。
我是编程的新手,但我尽我所能,所以任何帮助都表示赞赏。如果您不理解或想要更多信息,请询问和平。我已经修复了我得到的解决方案,但我仍然遇到代码问题,我不知道如何修复它。
以下是代码:
public void levelOne(View v)throws IOException{
Intent intent = new Intent(this, pageBeforeAction.class);
Button buttond = (Button) findViewById(R.id.buttonOne);
createQuestions("hogskoleprovet.txt");
startActivity(intent);
}
public void levelTwo(View v) throws IOException{
Intent intent = new Intent(this, pageBeforeAction.class);
Button buttonC = (Button) findViewById(R.id.buttonTwo);
createQuestions("hogskoleprovet.txt");
startActivity(intent);
}
public void createQuestions(String hogskoleprovet) throws IOException{
InputStream iS = getResources().getAssets().open(hogskoleprovet);
BufferedReader reader = new BufferedReader(new InputStreamReader(iS));
String question = reader.readLine();
String answer = reader.readLine();
String answerOne = reader.readLine();
String answerTwo = reader.readLine();
String answerThree = reader.readLine();
String answerFour = reader.readLine();
while(reader != null){
question = reader.readLine();
answer = reader.readLine();
answerOne = reader.readLine();
answerTwo = reader.readLine();
answerThree = reader.readLine();
answerFour = reader.readLine();
Question q = new Question (question, answer, answerOne, answerTwo, answerThree, answerFour);
mQuestions.add(q); break; }reader.close(); }
这是我的logcat的输出:
26837-26837/com.example.arnpet.ultimatehogskoleprovet E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.arnpet.ultimatehogskoleprovet, PID: 26837
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3969)
at android.view.View.performClick(View.java:4637)
at android.view.View$PerformClick.run(View.java:19422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5479)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3964) at android.view.View.performClick(View.java:4637)
答案 0 :(得分:1)
你陷入无限循环,在这里:
while (reader != null)
reader
的值永远不会在任何地方设置为null,因此您会陷入循环中。