定時器時間表：java.lang.IllegalArgumentException異常

Question

獲得，定時器附表Caused by: java.lang.IllegalArgumentException

我使用的圖像和週期對象JSON，期間對象controls the duration of image是可見的，但我正在逐漸引起：java.lang中。拋出：IllegalArgumentException

我json objects這個樣子的：

{ 
    "image": "http://localhost/image_01.jpg", 
    "period": "15000" 
} 

可我知道我在做什麼mistake，並在那裏我必須做出changes，得到它很快就完成了...

這裏是我的complete代碼：

public class MainActivity extends Activity { 

    ArrayList<String> actorsList; 
    ViewFlipper viewFlipper; 
    int period = 0; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     viewFlipper = (ViewFlipper) findViewById(R.id.flipper); 

     actorsList = new ArrayList<String>(); 

     // execute AsyncTask 
     new JSONAsyncTask().execute("http://localhost/images.txt"); 

     // handler to set duration and to upate animation 
     final Handler mHandler = new Handler(); 

     // Create runnable for posting 
     final Runnable mUpdateResults = new Runnable() { 
      public void run() { 
       viewFlipper.showNext(); // showNext() method 
      } 
     }; 

     int delay = 500; 

     Timer timer = new Timer(); // here i am getting error 
     timer.scheduleAtFixedRate(new TimerTask() { 

      public void run() { 
       mHandler.post(mUpdateResults); 
      } 
     }, delay, period); 
    } 
} 

logcat的

10-10 05:22:09.196: E/AndroidRuntime(537): FATAL EXCEPTION: main 
10-10 05:22:09.196: E/AndroidRuntime(537): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wingnity.jsonparsingtutorial/com.wingnity.jsonparsingtutorial.MainActivity}: java.lang.IllegalArgumentException 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread.access$600(ActivityThread.java:122) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.os.Looper.loop(Looper.java:137) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread.main(ActivityThread.java:4340) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at java.lang.reflect.Method.invoke(Method.java:511) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at dalvik.system.NativeStart.main(Native Method) 
10-10 05:22:09.196: E/AndroidRuntime(537): Caused by: java.lang.IllegalArgumentException 
10-10 05:22:09.196: E/AndroidRuntime(537):  at java.util.Timer.scheduleAtFixedRate(Timer.java:526) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at com.wingnity.jsonparsingtutorial.MainActivity.onCreate(MainActivity.java:60) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.Activity.performCreate(Activity.java:4465) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
10-10 05:22:09.196: E/AndroidRuntime(537):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 
10-10 05:22:09.196: E/AndroidRuntime(537):  ... 11 more 
10-10 05:22:11.355: I/Process(537): Sending signal. PID: 537 SIG: 9 

Answer 1

這是給你這個錯誤，因爲你安排的時間是小於零或零。嘗試調試並查看您通過delay & period作爲參數傳遞的值。