所以我使用文件来保存我的程序的一些分数,但问题是我不能只打印它们.我尝试了几件事但我找不到合适的东西是我的代码:
try{
String FILENAME = "FrogScoreFile";
FileInputStream fos = openFileInput(FILENAME);
byte[] b = new byte[1];
fos.read(b);
fos.close();
String score= String b;
game5HighScore.setText(b);
}catch (java.io.FileNotFoundException e) {
} catch (IOException e) {
e.printStackTrace();
}
因此,我正在重新制作几个月前的应用程序(将故障排除在外,并使一些事情变得更好)但是现在我遇到了一个问题,我没有找到,也不知道它是什么.如果我在手机上运行应用程序,则会出现此错误
01-20 22:37:46.595: E/AndroidRuntime(7350): FATAL EXCEPTION: main
01-20 22:37:46.595: E/AndroidRuntime(7350): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.stevedc.thinklogic/com.stevedc.thinklogic.TowerHanoi}: java.lang.NullPointerException
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1891)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.app.ActivityThread.access$600(ActivityThread.java:127)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.os.Handler.dispatchMessage(Handler.java:99)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.os.Looper.loop(Looper.java:137)
01-20 22:37:46.595: E/AndroidRuntime(7350): at android.app.ActivityThread.main(ActivityThread.java:4441)
01-20 22:37:46.595: E/AndroidRuntime(7350): at java.lang.reflect.Method.invokeNative(Native Method)
01-20 22:37:46.595: E/AndroidRuntime(7350): at java.lang.reflect.Method.invoke(Method.java:511)
01-20 22:37:46.595: E/AndroidRuntime(7350): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
01-20 22:37:46.595: E/AndroidRuntime(7350): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
01-20 22:37:46.595: E/AndroidRuntime(7350): at dalvik.system.NativeStart.main(Native Method)
01-20 …所以我在我的android程序中使用一个等待一秒钟或更长时间的线程,但有时它会怀疑它,有时候它根本不会等待,所以是否有另一种方法可以等待几秒钟？
Thread logotimer = new Thread(){
public void run(){
try{
sleep(1500);
Intent leveloverview = new Intent("com.technopolisapp.FROGLEVEL");
startActivity(leveloverview);
}
catch(InterruptedException e){
e.printStackTrace();
}
finally{
finish();
}
}
};
logotimer.start();
我正在尝试编译我的项目,但编译器一直给出错误,他无法找到我的资源文件,所以他无法编译
jul 23, 2013 1:29:24 PM org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: src/main/resources/Movies.hbm.xml
Initial SessionFactory creation failed.org.hibernate.MappingNotFoundException: resource: src/main/resources/Movies.hbm.xml not found
Exception in thread "main" java.lang.ExceptionInInitializerError
at com.hp.videotheek.HibernateUtil.<clinit>(HibernateUtil.java:17)
at com.hp.videotheek.App.main(App.java:12)
Caused by: org.hibernate.MappingNotFoundException: resource: src/main/resources/Movies.hbm.xml not found
at org.hibernate.cfg.Configuration.addResource(Configuration.java:738)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2167)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2139)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2119)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2072)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1987)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1966)
at com.hp.videotheek.HibernateUtil.<clinit>(HibernateUtil.java:13)
... 1 more
hibernate.cfg.xml文件,在这里他找不到映射资源,但它位于正确的位置
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.url">jdbc:postgresql://localhost:5432/postgres</property>
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.username">postgres</property> …所以我试图让 A 按钮不可见，我首先在论坛上搜索了答案并尝试了它，但它不起作用。
int level=0;
try{
String FILENAME = "TowerFile";
FileInputStream fos = openFileInput(FILENAME);
byte[] b = new byte[1];
fos.read(b);
fos.close();
if(new String(b).equalsIgnoreCase("1")){
level=1;
}
if(new String(b).equalsIgnoreCase("2")){
level=2;
}
if(new String(b).equalsIgnoreCase("3")){
level=3;
}
if(new String(b).equalsIgnoreCase("4")){
level=4;
}
if(new String(b).equalsIgnoreCase("5")){
level=5;
}
}catch (java.io.FileNotFoundException e) {
} catch (IOException e) {
e.printStackTrace();
}
Button button1 = (Button) findViewById(R.id.button1);
Button button2 = (Button) findViewById(R.id.button2);
Button button3 = (Button) findViewById(R.id.button3);
Button button4 = (Button) findViewById(R.id.button4);
Button button5 = (Button) findViewById(R.id.button5);
if(level==1){
button1.setVisibility(View.INVISIBLE);
} …所以我试图制作一个地图来存储一些在dir程序开头制作的文件.但是在Windows上仍然存在问题,因为目录永远不会发生.我找不到解决方案.相同的代码在Unix系统上运行良好,但在Windows系统上运行不正常.
protected String createScreenshotMap(){
this.dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
this.date = new Date();
String testMap = this.checkOS();
File fileMap = null;
boolean check;
try{
if(os.indexOf("win") >= 0){
fileMap = new File(testMap);
check = fileMap.canWrite();
System.out.println(check);
String path = "C:" + File.separator + "testRun" +
File.separator + this.date.toString();
fileMap = new File(path);
System.out.println(fileMap.getAbsolutePath());
}else{
fileMap = new File(testMap + this.date.toString() + "/");
}
check = fileMap.mkdir();
System.out.println(check);
}catch (Exception e){
e.printStackTrace();
}
return testMap;
}
如果我运行这段代码,我得到以下输出
true
C:\testRun\Fri Apr …