java.lang.InstantiationException

Question

我正在制作一个应用程序来发送X数量的文本给人们，在重写我的代码包括线程之后，它就崩溃了。此外，代码的"Thread.sleep(3000);“部分会冻结UI，还是让我的所有代码都在线程中解决这个问题？最后一个问题，如何防止脚本在后台停止(继续发送)

public abstract class multisender2 extends Activity implements Runnable {
    @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
    public void csend(View view) {
     EditText number = (EditText)findViewById(R.id.pnumber);
     EditText message = (EditText)findViewById(R.id.pmessage);
     EditText hmany = (EditText)findViewById(R.id.hmany);
     String _hmany = hmany.getText().toString();
     final String _number = number.getText().toString();
     final String _message = message.getText().toString();
     final int xtime = Integer.parseInt(_hmany);
     final int count = 1;
    Thread background = new Thread(new Runnable() { 

@Override
public void run() {
    try {
    if (count > xtime == false){
    SmsManager.getDefault().sendTextMessage(_number, null, _message, null, null);
        Thread.sleep(3000);
              }
    } catch (InterruptedException e) {
 }
 }

});       
    background.start();
}
}

谢谢，这是LogCat

07-12 21:04:40.222: E/AndroidRuntime(13948)：致命例外:主07-12 21:04:40.222: E/AndroidRuntime(13948)：java.lang.RuntimeException:无法实例化活动android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1580) java.lang.InstantiationException: com.dillonregi.multisender.multisender2 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1580) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1674) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.app.ActivityThread.access$1500(ActivityThread.java:117) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.app.ActivityThread$H.handleMessage(ActivityThread.java:942) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.os.Handler.dispatchMessage(Handler.java:99) 07-12 21:04:40.222: E/AndroidRuntime(13948)：android.os.Looper.loop(Looper.java:130) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.main(ActivityThread.java:3701) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at java.lang.reflectjava.lang.reflect.Method.invoke(Method.java:507) (原生方法) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at .Method.invokeNative 07-12 21:04:40.222: E/AndroidRuntime(13948)：at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at com.android.internal.os.ZygoteInit.main(( ZygoteInit.java:653) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at dalvik.system.NativeStart.main(原生方法) 07-12 21:04:40.222: E/AndroidRuntime(13948)：引起: java.lang.InstantiationException: com.dillonregi.multisender.multisender2 07-12 21:04:40.222: E/AndroidRuntime(13948)：at java.lang.Class.newInstanceImpl(原生方法) 07-12 21:04:40.222：android.app.Instrumentation.newActivity(Instrumentation.java:1021) (13948)：java.lang.Class.newInstance(Class.java:1409) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at java.lang.Class.newInstance 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1572) 07-12 21:04:40.222: E/AndroidRuntime(13948)：. 11更多07-12 21:04:40.222: E/AndroidRuntime(13948)：蓝色错误处理程序为主07-12 21:04:40.222: E/AndroidRuntime(13948)：java.lang.RuntimeException:无法实例化活动android.app.ActivityThread.performLaunchActivity(ActivityThread. java.lang.InstantiationException: com.dillonregi.multisender.multisender2 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1580) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1674) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在android.app.ActivityThread.access$1500(ActivityThread.java:117) 07-12 21:04:40.222: E/AndroidRuntime(13948)：android.app.ActivityThread$H.handleMessage(ActivityThread.java:942) 07-12 21:04: 04:android.app.ActivityThread$H.handleMessage(ActivityThread.java:942)07-12 21:04：40.222: E/AndroidRuntime(13948)：在android.os.Handler.dispatchMessage(Handler.java:99) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.os.Looper.loop(Looper.java:130) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.main(ActivityThread.java:3701) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在java.lang.reflect.Method.invoke(Method.java:507) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at java.lang.reflect.Method.invokeNative 07-12 21:04:40.222: E/AndroidRuntime(13948)：at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:895) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:653) 07-12 21:04:40.222: E/AndroidRuntime(13948)：at dalvik.system.NativeStart.main(原生方法) 07-12 21:04:40.222: E/AndroidRuntime(13948)：引起: java.lang.InstantiationException: com.dillonregi.multisender.multisender2 07-12 21:04:40.222: E/AndroidRuntime(13948)：at java.lang.Class.newInstanceImpl(原生方法) 07-12 21：04:40.222: E/AndroidRuntime(13948)：在android.app.Instrumentation.newActivity(Instrumentation.java:1021) (Class.java:1409) 07-12 21:04:40.222: E/AndroidRuntime(13948)：在java.lang.Class.newInstance 07-12 21:04:40.222: E/AndroidRuntime(13948)：at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1572) 07-12 21:04:40.222: E/AndroidRuntime(13948)：. 11多11

Answer 1

不要阻塞主线程。尝试使用AsyncTask。阅读更多信息- 进程和线程