試圖在我的Android項目中使用啓動畫面給出異常

我想在應用程序中調用啓動活動或啓動畫面一段時間（5秒），但我收到異常。我只是想將此活動加載到5秒，然後消失，然後主要活動來。我是新來android.Any幫助將不勝感激：試圖在我的Android項目中使用啓動畫面給出異常

我的代碼是這樣的：

public class StartActivity extends Activity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_start); 

       ProgressDialog pbar=new ProgressDialog(getApplicationContext()); 

       pbar.setMessage("Connecting..."); 
       pbar.setCancelable(false); 
       pbar.show(); 

     new Handler().postDelayed(new Runnable() { 
      @Override 
      public void run() { 
       final Intent mainIntent = new Intent(StartActivity.this, MainActivity.class); 
       StartActivity.this.startActivity(mainIntent); 
       StartActivity.this.finish(); 
      } 
     }, 5000); 


      } 

} 


Exception I am getting is like this: 

04-16 09:38:06.355 1874-1874/com.mubu.wheathertoday.wheathertoday D/﹕ HostConnection::get() New Host Connection established 0xae2f9760, tid 1874 
04-16 09:38:06.371 1874-1874/com.mubu.wheathertoday.wheathertoday D/Atlas﹕ Validating map... 
04-16 09:38:06.387 1874-1874/com.mubu.wheathertoday.wheathertoday D/AndroidRuntime﹕ Shutting down VM 
    --------- beginning of crash 
04-16 09:38:06.405 1874-1874/com.mubu.wheathertoday.wheathertoday E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.mubu.wheathertoday.wheathertoday, PID: 1874 
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mubu.wheathertoday.wheathertoday/com.mubu.wheathertoday.wheathertoday.StartActivity}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
      at android.app.ActivityThread.access$800(ActivityThread.java:144) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
      at android.os.Handler.dispatchMessage(Handler.java:102) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
    Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
      at android.view.ViewRootImpl.setView(ViewRootImpl.java:566) 
      at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:272) 
      at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) 
      at android.app.Dialog.show(Dialog.java:298) 
      at com.mubu.wheathertoday.wheathertoday.StartActivity.onCreate(StartActivity.java:23) 
      at android.app.Activity.performCreate(Activity.java:5937) 
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
            at android.app.ActivityThread.access$800(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
04-16 09:41:47.469 2297-2309/com.mubu.wheathertoday.wheathertoday I/art﹕ Background sticky concurrent mark sweep GC freed 1702(90KB) AllocSpace objects, 0(0B) LOS objects, 0% free, 1367KB/1367KB, paused 1.145ms total 240.104ms 
04-16 09:41:47.769 2297-2312/com.mubu.wheathertoday.wheathertoday D/OpenGLRenderer﹕ Render dirty regions requested: true 
04-16 09:41:47.779 2297-2297/com.mubu.wheathertoday.wheathertoday D/﹕ HostConnection::get() New Host Connection established 0xae2ff760, tid 2297 
04-16 09:41:47.789 2297-2297/com.mubu.wheathertoday.wheathertoday D/Atlas﹕ Validating map... 
04-16 09:41:47.798 2297-2297/com.mubu.wheathertoday.wheathertoday D/AndroidRuntime﹕ Shutting down VM 
04-16 09:41:47.811 2297-2297/com.mubu.wheathertoday.wheathertoday E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.mubu.wheathertoday.wheathertoday, PID: 2297 
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mubu.wheathertoday.wheathertoday/com.mubu.wheathertoday.wheathertoday.StartActivity}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
      at android.app.ActivityThread.access$800(ActivityThread.java:144) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
      at android.os.Handler.dispatchMessage(Handler.java:102) 
      at android.os.Looper.loop(Looper.java:135) 
      at android.app.ActivityThread.main(ActivityThread.java:5221) 
      at java.lang.reflect.Method.invoke(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:372) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
    Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
      at android.view.ViewRootImpl.setView(ViewRootImpl.java:566) 
      at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:272) 
      at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) 
      at android.app.Dialog.show(Dialog.java:298) 
      at com.mubu.wheathertoday.wheathertoday.StartActivity.onCreate(StartActivity.java:23) 
      at android.app.Activity.performCreate(Activity.java:5937) 
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
            at android.app.ActivityThread.access$800(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

來源

2015-04-16 killer

使用'StartActivity.this'，而不是'getApplicationContext（）'是的解散你的進步與'pbar.dismiss（）對話框;' – Piyush

使用StartActivity.this，而不是getApplicationContext()創建ProgressDialog對象，如：

ProgressDialog pbar=new ProgressDialog(StartActivity.this);

來源

2015-04-16 04:25:35

但什麼是使用像這樣的原因。 – killer

@GonchuGolu，ProgressDialog需要當前活動上下文引用而不是應用程序上下文引用。 –

非常感謝你 – killer

每當你在移動到其他屏幕或屏幕旋轉之前顯示進度對話框，您必須關閉進度對話框。

ProgressDialog pbar=new ProgressDialog(StartActivity.this); 
     ..... 
     pbar.show(); 

     new Handler().postDelayed(new Runnable() { 
       @Override 
       public void run() { 
        pbar.dismiss(); 
        ... 

        } 
       }, 5000);

來源

2015-04-16 04:35:48 Bharatesh

變化getApplicationContext()到StartActivity.this

還添加Progress解僱代碼，否則你有android.view.WindowLeaked錯誤

改變你的代碼下面...

final ProgressDialog pbar = new ProgressDialog(StartActivity.this); 

    pbar.setMessage("Connecting..."); 
    pbar.setCancelable(false); 
    pbar.show(); 

    new Handler().postDelayed(new Runnable() { 
     @Override 
     public void run() { 
      if (pbar != null && pbar.isShowing()) { 
       pbar.dismiss(); 
      } 

      Intent mainIntent = new Intent(StartActivity.this, MainActivity.class); 
      startActivity(mainIntent); 
      finish(); 
     } 
    }, 5000);

來源

2015-04-16 04:54:32

替換該行

ProgressDialog pbar=new ProgressDialog(StartActivity.this);

與

ProgressDialog pbar=new ProgressDialog(getApplicationContext());

來源

2015-04-16 05:00:44

試圖在我的Android項目中使用啓動畫面給出異常

回答

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