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IllegalStateException: view already added to window manager

I spent hours trying to fix the crash of the application, and I think it deserves a question:

An exception:

java.lang.IllegalStateException: View android.widget.LinearLayout{41a97eb8 V.E..... ......ID 0,0-540,105 #7f0b020d app:id/toast_layout_root} has already been added to the window manager.
   at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:223)
   at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
   at android.widget.Toast$TN.handleShow(Toast.java:402)
   at android.widget.Toast$TN$1.run(Toast.java:310)
   at android.os.Handler.handleCallback(Handler.java:730)
   at android.os.Handler.dispatchMessage(Handler.java:92)
   at android.os.Looper.loop(Looper.java:137)
   at android.app.ActivityThread.main(ActivityThread.java:5136)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:525)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
   at dalvik.system.NativeStart.main(NativeStart.java)

The code:

I have a custom toast following this guide

I defined the custom toast as ToastMessageBar.java, and the constructor looks like this:

public ToastMessageBar(Activity activity) {
    LayoutInflater inflater = activity.getLayoutInflater;
    mToastLayout = inflater.inflate(R.layout.toast_layout,
            (ViewGroup) activity.findViewById(R.id.toast_layout_root));

    mMessageView = (TextView) mToastLayout.findViewById(R.id.toast_message);
    mSubtitleView = (TextView) mToastLayout.findViewById(R.id.toast_subtitle);
}

and the way I display the message with the toast is as follows:

private void showMessage(MessageType type, String message, String subtitle) {
    int duration = Toast.LENGTH_SHORT;
    if (mToastLayout != null) {
        int colorId;
        switch (type) {
            case Warning:
                colorId = R.color.warning_bar_color;
                duration = Toast.LENGTH_SHORT;
                break;

            case Error:
                colorId = R.color.error_bar_color;
                break;

            default:
                colorId = R.color.info_bar_color;
                break;
        }

        mToastLayout.setBackgroundColor(
                MyApp.getContext().getResources().getColor(colorId));

        if (subtitle == null) {
            mMessageView.setVisibility(View.GONE);
            mSubtitleView.setText(message);
        } else {
            mMessageView.setVisibility(View.VISIBLE);
            mMessageView.setText(message);
            mSubtitleView.setText(subtitle);
        }
    }

    Utils.showToast(mToastLayout, message, duration);
}

public static void showToast(View layout, String message, int duration) {
    if (layout != null) {
        Toast toast = new Toast(MyApp.getContext());
        toast.setGravity(Gravity.TOP|Gravity.FILL_HORIZONTAL, 0, 0);
        toast.setDuration(duration);
        toast.setView(layout);
        toast.show();
        return;
    }

    Toast.makeText(MyApp.getContext(), message, Toast.LENGTH_LONG).show();
}

In MyBaseActivity.onCreate()I define ToastMessageBar:

mMessageBar = new ToastMessageBar(this);

This way I can use showMessage()in all actions inheriting MyBaseActivity.

It seems that an exception occurs when I call toast.show();, but it does not happen all the time (only in rare cases). I do not know what caused the exception.

+4
3

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. , . (Toast), , setView. , , .

+1

,

   mToastLayout = inflater.inflate(R.layout.toast_layout,
            (ViewGroup) activity.findViewById(R.id.toast_layout_root));

:

mToastLayout = inflater.inflate(R.layout.toast_layout,null);
0

, Toast.

Toast.java handleHide(). :

            // note: checking parent() just to make sure the view has
            // been added...  i have seen cases where we get here when
            // the view isn't yet added, so let try not to crash.
            if (mView.getParent() != null) {
                if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
                mWM.removeView(mView);
            }

Toast.java handleShow()

            if (mView.getParent() != null) {
                if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
                mWM.removeView(mView);
            }
            if (localLOGV) Log.v(TAG, "ADD! " + mView + " in " + this);
            mWM.addView(mView, mParams);

, , . . IllegalStateException

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