我试图创建一个简单的高/低应用程序,但应用程序崩溃时,我尝试获得一个随机数。 下面是一些代码:随机数字1-6
final TextView counter = (TextView) findViewById(R.id.tcounter);
Button high = (Button) findViewById(R.id.bhigh);
Button low = (Button) findViewById(R.id.blow);
Button start = (Button) findViewById(R.id.bplay);
final Random rstart = new Random();
final int counternr = rstart.nextInt(5) + 1;
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
counter.setText(counternr);
是应该设置TextView的“柜台”,以1-6的随机数,但让我崩溃。
在此先感谢!
编辑:这是错误的文字:
11-23 20:17:40.509: ERROR/AndroidRuntime(765): FATAL EXCEPTION: main
11-23 20:17:40.509: ERROR/AndroidRuntime(765): java.lang.RuntimeException: Unable to start activity ComponentInfo{xxx.xxx.xxx/xxx.xxx.xxx.play}: java.lang.NullPointerException
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.os.Handler.dispatchMessage(Handler.java:99)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.os.Looper.loop(Looper.java:123)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread.main(ActivityThread.java:3683)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at java.lang.reflect.Method.invokeNative(Native Method)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at java.lang.reflect.Method.invoke(Method.java:507)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at dalvik.system.NativeStart.main(Native Method)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): Caused by: java.lang.NullPointerException
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at xxx.xxx.xxx.play.onCreate(play.java:26)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
11-23 20:17:40.509: ERROR/AndroidRuntime(765): ... 11 more
很凌乱,但我希望这是确定。
发布堆栈跟踪或日志的副本,显示崩溃发生的位置以及抛出的异常。 – Grambot
“NullPointerException”在“xxx.xxx.xxx.play.onCreate” – Edalol