无法显示使用Asynctask在android

-1

动画对话框我试图显示在android中使用AsyncTask自定义动画对话框，但我现在得到一些问题在下面给出的日志猫。任何人都可以告诉我如何解决这个问题？无法显示使用Asynctask在android

logcat的

06-20 09:42:47.981: E/AndroidRuntime(668): FATAL EXCEPTION: main 
06-20 09:42:47.981: E/AndroidRuntime(668): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.customdialog_sample/com.example.customdialog_sample.MainActivity}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.os.Handler.dispatchMessage(Handler.java:99) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.os.Looper.loop(Looper.java:123) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread.main(ActivityThread.java:3683) 
06-20 09:42:47.981: E/AndroidRuntime(668): at java.lang.reflect.Method.invokeNative(Native Method) 
06-20 09:42:47.981: E/AndroidRuntime(668): at java.lang.reflect.Method.invoke(Method.java:507) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
06-20 09:42:47.981: E/AndroidRuntime(668): at dalvik.system.NativeStart.main(Native Method) 
06-20 09:42:47.981: E/AndroidRuntime(668): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.view.ViewRoot.setView(ViewRoot.java:531) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.Dialog.show(Dialog.java:241) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.example.customdialog_sample.LoadingDialog.LodingDialog1(LoadingDialog.java:60) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.example.customdialog_sample.LoadingDialog.<init>(LoadingDialog.java:19) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.example.customdialog_sample.MainActivity$CustomLoad.<init>(MainActivity.java:66) 
06-20 09:42:47.981: E/AndroidRuntime(668): at com.example.customdialog_sample.MainActivity.onCreate(MainActivity.java:58) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
06-20 09:42:47.981: E/AndroidRuntime(668): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
06-20 09:42:47.981: E/AndroidRuntime(668): ... 11 more

MainActiviy.java

public class MainActivity extends Activity 
{ 

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


      CustomLoad task = new CustomLoad(); 
      task.execute(); 

    } 

    public class CustomLoad extends AsyncTask<Void, Void, Void> 
    { 
     LoadingDialog load_instance = new LoadingDialog(getApplicationContext()); 

     @Override 
     protected void onPreExecute() { 
     // TODO Auto-generated method stub 
     // super.onPreExecute(); 

     load_instance.LodingDialog1(MainActivity.this, "Rounding...", false); 


     } 

     @Override 
     protected Void doInBackground(Void... params) { 
     // TODO Auto-generated method stub 
     return null; 

     } 

     @Override 
     protected void onPostExecute(Void result) { 
     // TODO Auto-generated method stub 
     // super.onPostExecute(result); 

      load_instance.hide(); 
     }}}

LoadingDialog.java

public class LoadingDialog extends Dialog 
{ 
    private Dialog mpd = null; 
    private LayoutInflater lyt_Inflater = null; 
    public LoadingDialog(Context context) 
    {  
      super(context); 
      LodingDialog1(context,"Loading...",false); 
    } 


    public LoadingDialog(Context context,String LoadingText) 
    { 
      super(context); 
      LodingDialog1(context,LoadingText,false); 

    } 

    public LoadingDialog(Context context,String LoadingText, boolean cancelable) 
    { 
      super(context); 
      LodingDialog1(context,LoadingText,cancelable); 
    } 

    public void LodingDialog1(Context context,String LoadingText, boolean cancelable) 
    { 
      lyt_Inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

      final View view_lyt = lyt_Inflater.inflate( R.layout.dialog, null); 

      ImageView imageView = (ImageView) view_lyt.findViewById(R.id.imageView1); 
      Animation a = AnimationUtils.loadAnimation(context, R.anim.progress_anim); 
      a.setDuration(2000); 
      imageView.startAnimation(a); 

      a.setInterpolator(new Interpolator() 
      { 
       private final int frameCount = 8; 

       @Override 
       public float getInterpolation(float input) 
       { 
         return (float)Math.floor(input*frameCount)/frameCount; 
       } 
      }); 
      mpd = new Dialog(context, R.style.ThemeDialogCustom); 
      mpd.setContentView(view_lyt); 
      mpd.setCancelable(cancelable); 
      mpd.show(); 
    } 

    public void hide() 
    { 

      if (mpd != null) { 
       if (mpd.isShowing()) 
       { 
         mpd.dismiss(); 
       } 
      }}}

来源

2014-06-20 prabu

试试这个

LoadingDialog load_instance = new LoadingDialog(MainActivity.this);

代替

LoadingDialog load_instance = new LoadingDialog(getApplicationContext());

你应该通过Activity上下文LoadingDialog(MainActivity.this)

来源

2014-06-20 10:41:13

其工作正常，但如何阻止它，onPostExecute我调用了隐藏（）方法，但它不是停止加载 – prabu

你能告诉我如何解决这个问题吗？ – prabu

@prabu好吧现在告诉我有什么问题？ –

无法显示使用Asynctask在android

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