我的论文现在有一个工作代码,但我决定使用函数/方法/对象(不确定如何称呼它们)来清理它,但是在组织它们之后,我的应用程序每次启动时都会崩溃。我真的不知道问题是什么。
主屏幕显示开始和退出按钮。当我按开始时,应用程序显示“不幸的是论文已停止”。
我的代码是这样的:
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.items, menu);
View v = (View) menu.findItem(R.id.search).getActionView();
final EditText txtSearch = ( EditText ) v.findViewById(R.id.txt_search);
txtSearch.setOnEditorActionListener(new OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
String curtextArray = txtSearch.getText().toString();
char[] curletters = curtextArray.toCharArray();
char[] curenhancedLetters = curtextArray.toCharArray();
//probably, problem here on Stemming stem
Stemming stem = new Stemming(curtextArray, curletters, curenhancedLetters);
AsyncTaskRunner newTask = new AsyncTaskRunner(enhancedStem);
// and probably, problem is here on the stem.<x process>;
stem.removeApostrophe();
stem.vowelMarking();
stem.shortSyllable();
if (continueStem == 1){
stem.region1();
stem.region2();
stem.shortWord();
stem.step0();
stem.step1a();
stem.step1b();
newTask.execute();
}
return false;
};
});
return super.onCreateOptionsMenu(menu);
}
这是我的词干课程
public class Stemming {
String textArray;
char[] letters;
char[] enhancedLetters;
public Stemming (String curtextArray, char[] curletters, char[] curenhancedLetters){
this.textArray = curtextArray;
this.letters = curletters;
this.enhancedLetters = curenhancedLetters;
}
public Stemming(){
}
public void removeApostrophe(){
...processes here
}
public void vowelMarking(){
...processes here
}
public void shortSyllable(){
...processes here
}
public void region1(){
...processes here
}
public void region2(){
...processes here
}
public void shortWord(){
...processes here
}
public void step0(){
...processes here
}
public void step1a(){
...processes here
}
public void step1b(){
...processes here
}
}
}
我有一个关于它为什么会崩溃的理论。这种方法可行吗?(伪代码):
public class Stemming {
String result;
String sample = "A A A A A";
public void changeAtoB{
//do process to convert all As to Bs making String sample = "B B B B B"
result = sample;
}
public void changeBtoC{
//do process to convert all Bs to Cs making String result = "C C C C C"
result = result;
}
... so on {
}
}
我所做的是直接处理字符串,而不做任何变量声明(我的变量是全局声明的)或初始化。而且我也没有放任何退货声明。
我的代码在它仍然没有那些功能/方法/对象的时候可以工作。
对不起我的长帖子。不知道如何更好地解释它。我希望你能帮助我。先感谢您!
日志猫:
>E/AndroidRuntime(11007): FATAL EXCEPTION: main
E/AndroidRuntime(11007): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.atienzaerni.thesis/com.atienzaerni.thesis.secondactivity}: java.lang.NullPointerException
E/AndroidRuntime(11007): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1891)
E/AndroidRuntime(11007): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
E/AndroidRuntime(11007): at android.app.ActivityThread.access$600(ActivityThread.java:127)
E/AndroidRuntime(11007): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
E/AndroidRuntime(11007): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(11007): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(11007): at android.app.ActivityThread.main(ActivityThread.java:4441)
E/AndroidRuntime(11007): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(11007): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime(11007): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
E/AndroidRuntime(11007): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
E/AndroidRuntime(11007): at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(11007): Caused by: java.lang.NullPointerException
E/AndroidRuntime(11007): at android.app.Activity.findViewById(Activity.java:1794)
E/AndroidRuntime(11007): at com.atienzaerni.thesis.secondactivity.<init>(secondactivity.java:54)
E/AndroidRuntime(11007): at java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime(11007): at java.lang.Class.newInstance(Class.java:1319)
E/AndroidRuntime(11007): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
E/AndroidRuntime(11007): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1882)
E/AndroidRuntime(11007): ... 11 more
I/Process(11007): Sending signal. PID: 11007 SIG: 9
(顺便说一句,我正在使用我的手机。不是模拟器。如果这有所作为)