core/java/android/widget/Toast.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2007 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package android.widget;

 import android.annotation.IntDef;
 import android.annotation.StringRes;
 import android.app.INotificationManager;
 import android.app.ITransientNotification;
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.graphics.PixelFormat;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.util.Log;
 import android.view.Gravity;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.WindowManager;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityManager;

 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;

 /**
  * A toast is a view containing a quick little message for the user.  The toast class
  * helps you create and show those.
  * {@more}
  *
  * <p>
  * When the view is shown to the user, appears as a floating view over the
  * application.  It will never receive focus.  The user will probably be in the
  * middle of typing something else.  The idea is to be as unobtrusive as
  * possible, while still showing the user the information you want them to see.
  * Two examples are the volume control, and the brief message saying that your
  * settings have been saved.
  * <p>
  * The easiest way to use this class is to call one of the static methods that constructs
  * everything you need and returns a new Toast object.
  *
  * <div class="special reference">
  * <h3>Developer Guides</h3>
  * <p>For information about creating Toast notifications, read the
  * <a href="{@docRoot}guide/topics/ui/notifiers/toasts.html">Toast Notifications</a> developer
  * guide.</p>
  * </div>
  */
 public class Toast {
     static final String TAG = "Toast";
     static final boolean localLOGV = false;

     /** @hide */
     @IntDef({LENGTH_SHORT, LENGTH_LONG})
     @Retention(RetentionPolicy.SOURCE)
     public @interface Duration {}

     /**
      * Show the view or text notification for a short period of time.  This time
      * could be user-definable.  This is the default.
      * @see #setDuration
      */
     public static final int LENGTH_SHORT = 0;

     /**
      * Show the view or text notification for a long period of time.  This time
      * could be user-definable.
      * @see #setDuration
      */
     public static final int LENGTH_LONG = 1;

     final Context mContext;
     final TN mTN;
     int mDuration;
     View mNextView;

     /**
      * Construct an empty Toast object.  You must call {@link #setView} before you
      * can call {@link #show}.
      *
      * @param context  The context to use.  Usually your {@link android.app.Application}
      *                 or {@link android.app.Activity} object.
      */
     public Toast(Context context) {
         mContext = context;
         mTN = new TN(context.getPackageName());
         mTN.mY = context.getResources().getDimensionPixelSize(
                 com.android.internal.R.dimen.toast_y_offset);
         mTN.mGravity = context.getResources().getInteger(
                 com.android.internal.R.integer.config_toastDefaultGravity);
     }

     /**
      * Show the view for the specified duration.
      */
     public void show() {
         if (mNextView == null) {
             throw new RuntimeException("setView must have been called");
         }

         INotificationManager service = getService();
         String pkg = mContext.getOpPackageName();
         TN tn = mTN;
         tn.mNextView = mNextView;

         try {
             service.enqueueToast(pkg, tn, mDuration);
         } catch (RemoteException e) {
             // Empty
         }
     }

     /**
      * Close the view if it's showing, or don't show it if it isn't showing yet.
      * You do not normally have to call this.  Normally view will disappear on its own
      * after the appropriate duration.
      */
     public void cancel() {
         mTN.cancel();
     }

     /**
      * Set the view to show.
      * @see #getView
      */
     public void setView(View view) {
         mNextView = view;
     }

     /**
      * Return the view.
      * @see #setView
      */
     public View getView() {
         return mNextView;
     }

     /**
      * Set how long to show the view for.
      * @see #LENGTH_SHORT
      * @see #LENGTH_LONG
      */
     public void setDuration(@Duration int duration) {
         mDuration = duration;
         mTN.mDuration = duration;
     }

     /**
      * Return the duration.
      * @see #setDuration
      */
     @Duration
     public int getDuration() {
         return mDuration;
     }

     /**
      * Set the margins of the view.
      *
      * @param horizontalMargin The horizontal margin, in percentage of the
      *        container width, between the container's edges and the
      *        notification
      * @param verticalMargin The vertical margin, in percentage of the
      *        container height, between the container's edges and the
      *        notification
      */
     public void setMargin(float horizontalMargin, float verticalMargin) {
         mTN.mHorizontalMargin = horizontalMargin;
         mTN.mVerticalMargin = verticalMargin;
     }

     /**
      * Return the horizontal margin.
      */
     public float getHorizontalMargin() {
         return mTN.mHorizontalMargin;
     }

     /**
      * Return the vertical margin.
      */
     public float getVerticalMargin() {
         return mTN.mVerticalMargin;
     }

     /**
      * Set the location at which the notification should appear on the screen.
      * @see android.view.Gravity
      * @see #getGravity
      */
     public void setGravity(int gravity, int xOffset, int yOffset) {
         mTN.mGravity = gravity;
         mTN.mX = xOffset;
         mTN.mY = yOffset;
     }

      /**
      * Get the location at which the notification should appear on the screen.
      * @see android.view.Gravity
      * @see #getGravity
      */
     public int getGravity() {
         return mTN.mGravity;
     }

     /**
      * Return the X offset in pixels to apply to the gravity's location.
      */
     public int getXOffset() {
         return mTN.mX;
     }

     /**
      * Return the Y offset in pixels to apply to the gravity's location.
      */
     public int getYOffset() {
         return mTN.mY;
     }

     /**
      * Gets the LayoutParams for the Toast window.
      * @hide
      */
     public WindowManager.LayoutParams getWindowParams() {
         return mTN.mParams;
     }

     /**
      * Make a standard toast that just contains a text view.
      *
      * @param context  The context to use.  Usually your {@link android.app.Application}
      *                 or {@link android.app.Activity} object.
      * @param text     The text to show.  Can be formatted text.
      * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or
      *                 {@link #LENGTH_LONG}
      *
      */
     public static Toast makeText(Context context, CharSequence text, @Duration int duration) {
         Toast result = new Toast(context);

         LayoutInflater inflate = (LayoutInflater)
                 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);
         TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);
         tv.setText(text);

         result.mNextView = v;
         result.mDuration = duration;

         return result;
     }

     /**
      * Make a standard toast that just contains a text view with the text from a resource.
      *
      * @param context  The context to use.  Usually your {@link android.app.Application}
      *                 or {@link android.app.Activity} object.
      * @param resId    The resource id of the string resource to use.  Can be formatted text.
      * @param duration How long to display the message.  Either {@link #LENGTH_SHORT} or
      *                 {@link #LENGTH_LONG}
      *
      * @throws Resources.NotFoundException if the resource can't be found.
      */
     public static Toast makeText(Context context, @StringRes int resId, @Duration int duration)
                                 throws Resources.NotFoundException {
         return makeText(context, context.getResources().getText(resId), duration);
     }

     /**
      * Update the text in a Toast that was previously created using one of the makeText() methods.
      * @param resId The new text for the Toast.
      */
     public void setText(@StringRes int resId) {
         setText(mContext.getText(resId));
     }

     /**
      * Update the text in a Toast that was previously created using one of the makeText() methods.
      * @param s The new text for the Toast.
      */
     public void setText(CharSequence s) {
         if (mNextView == null) {
             throw new RuntimeException("This Toast was not created with Toast.makeText()");
         }
         TextView tv = (TextView) mNextView.findViewById(com.android.internal.R.id.message);
         if (tv == null) {
             throw new RuntimeException("This Toast was not created with Toast.makeText()");
         }
         tv.setText(s);
     }

     // =======================================================================================
     // All the gunk below is the interaction with the Notification Service, which handles
     // the proper ordering of these system-wide.
     // =======================================================================================

     private static INotificationManager sService;

     static private INotificationManager getService() {
         if (sService != null) {
             return sService;
         }
         sService = INotificationManager.Stub.asInterface(ServiceManager.getService("notification"));
         return sService;
     }

     private static class TN extends ITransientNotification.Stub {
         final Runnable mHide = new Runnable() {
             @Override
             public void run() {
             }
         };

         private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

         private static final int SHOW = 0;
         private static final int HIDE = 1;
         private static final int CANCEL = 2;
         final Handler mHandler = new Handler() {
             @Override
             public void handleMessage(Message msg) {
                 switch (msg.what) {
                     case SHOW: {
                         IBinder token = (IBinder) msg.obj;
                         handleShow(token);
                         break;
                     }
                     case HIDE: {
                         handleHide();
                         // Don't do this in handleHide() because it is also invoked by handleShow()
                         mNextView = null;
                         break;
                     }
                     case CANCEL: {
                         handleHide();
                         // Don't do this in handleHide() because it is also invoked by handleShow()
                         mNextView = null;
                         try {
                             getService().cancelToast(mPackageName, TN.this);
                         } catch (RemoteException e) {
                         }
                         break;
                     }
                 }
             }
         };

         int mGravity;
         int mX, mY;
         float mHorizontalMargin;
         float mVerticalMargin;


         View mView;
         View mNextView;
         int mDuration;

         WindowManager mWM;

         String mPackageName;

         static final long SHORT_DURATION_TIMEOUT = 5000;
         static final long LONG_DURATION_TIMEOUT = 1000;

         TN(String packageName) {
             // XXX This should be changed to use a Dialog, with a Theme.Toast
             // defined that sets up the layout params appropriately.
             final WindowManager.LayoutParams params = mParams;
             params.height = WindowManager.LayoutParams.WRAP_CONTENT;
             params.width = WindowManager.LayoutParams.WRAP_CONTENT;
             params.format = PixelFormat.TRANSLUCENT;
             params.windowAnimations = com.android.internal.R.style.Animation_Toast;
             params.type = WindowManager.LayoutParams.TYPE_TOAST;
             params.setTitle("Toast");
             params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                     | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                     | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

             mPackageName = packageName;
         }

         /**
          * schedule handleShow into the right thread
          */
         @Override
         public void show(IBinder windowToken) {
             if (localLOGV) Log.v(TAG, "SHOW: " + this);
             mHandler.obtainMessage(SHOW, windowToken).sendToTarget();
         }

         /**
          * schedule handleHide into the right thread
          */
         @Override
         public void hide() {
             if (localLOGV) Log.v(TAG, "HIDE: " + this);
             mHandler.obtainMessage(HIDE).sendToTarget();
         }

         public void cancel() {
             if (localLOGV) Log.v(TAG, "CANCEL: " + this);
             mHandler.obtainMessage(CANCEL).sendToTarget();
         }

         public void handleShow(IBinder windowToken) {
             if (localLOGV) Log.v(TAG, "HANDLE SHOW: " + this + " mView=" + mView
                     + " mNextView=" + mNextView);
             if (mView != mNextView) {
                 // remove the old view if necessary
                 handleHide();
                 mView = mNextView;
                 Context context = mView.getContext().getApplicationContext();
                 String packageName = mView.getContext().getOpPackageName();
                 if (context == null) {
                     context = mView.getContext();
                 }
                 mWM = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
                 // We can resolve the Gravity here by using the Locale for getting
                 // the layout direction
                 final Configuration config = mView.getContext().getResources().getConfiguration();
                 final int gravity = Gravity.getAbsoluteGravity(mGravity, config.getLayoutDirection());
                 mParams.gravity = gravity;
                 if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) {
                     mParams.horizontalWeight = 1.0f;
                 }
                 if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) {
                     mParams.verticalWeight = 1.0f;
                 }
                 mParams.x = mX;
                 mParams.y = mY;
                 mParams.verticalMargin = mVerticalMargin;
                 mParams.horizontalMargin = mHorizontalMargin;
                 mParams.packageName = packageName;
                 mParams.hideTimeoutMilliseconds = mDuration ==
                     Toast.LENGTH_LONG ? LONG_DURATION_TIMEOUT : SHORT_DURATION_TIMEOUT;
                 mParams.token = windowToken;
                 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);
                 trySendAccessibilityEvent();
             }
         }

         private void trySendAccessibilityEvent() {
             AccessibilityManager accessibilityManager =
                     AccessibilityManager.getInstance(mView.getContext());
             if (!accessibilityManager.isEnabled()) {
                 return;
             }
             // treat toasts as notifications since they are used to
             // announce a transient piece of information to the user
             AccessibilityEvent event = AccessibilityEvent.obtain(
                     AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
             event.setClassName(getClass().getName());
             event.setPackageName(mView.getContext().getPackageName());
             mView.dispatchPopulateAccessibilityEvent(event);
             accessibilityManager.sendAccessibilityEvent(event);
         }

         public void handleHide() {
             if (localLOGV) Log.v(TAG, "HANDLE HIDE: " + this + " mView=" + mView);
             if (mView != null) {
                 // 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's try not to crash.
                 if (mView.getParent() != null) {
                     if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
                     mWM.removeViewImmediate(mView);
                 }

                 mView = null;
             }
         }
     }
 }
	/*
	* Copyright (C) 2007 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package android.widget;

	import android.annotation.IntDef;
	import android.annotation.StringRes;
	import android.app.INotificationManager;
	import android.app.ITransientNotification;
	import android.content.Context;
	import android.content.res.Configuration;
	import android.content.res.Resources;
	import android.graphics.PixelFormat;
	import android.os.Handler;
	import android.os.IBinder;
	import android.os.Message;
	import android.os.RemoteException;
	import android.os.ServiceManager;
	import android.util.Log;
	import android.view.Gravity;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.WindowManager;
	import android.view.accessibility.AccessibilityEvent;
	import android.view.accessibility.AccessibilityManager;

	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;

	/**
	* A toast is a view containing a quick little message for the user. The toast class
	* helps you create and show those.
	* {@more}
	*
	* <p>
	* When the view is shown to the user, appears as a floating view over the
	* application. It will never receive focus. The user will probably be in the
	* middle of typing something else. The idea is to be as unobtrusive as
	* possible, while still showing the user the information you want them to see.
	* Two examples are the volume control, and the brief message saying that your
	* settings have been saved.
	* <p>
	* The easiest way to use this class is to call one of the static methods that constructs
	* everything you need and returns a new Toast object.
	*
	* <div class="special reference">
	* <h3>Developer Guides</h3>
	* <p>For information about creating Toast notifications, read the
	* <a href="{@docRoot}guide/topics/ui/notifiers/toasts.html">Toast Notifications</a> developer
	* guide.</p>
	* </div>
	*/
	public class Toast {
	static final String TAG = "Toast";
	static final boolean localLOGV = false;

	/** @hide */
	@IntDef({LENGTH_SHORT, LENGTH_LONG})
	@Retention(RetentionPolicy.SOURCE)
	public @interface Duration {}

	/**
	* Show the view or text notification for a short period of time. This time
	* could be user-definable. This is the default.
	* @see #setDuration
	*/
	public static final int LENGTH_SHORT = 0;

	/**
	* Show the view or text notification for a long period of time. This time
	* could be user-definable.
	* @see #setDuration
	*/
	public static final int LENGTH_LONG = 1;

	final Context mContext;
	final TN mTN;
	int mDuration;
	View mNextView;

	/**
	* Construct an empty Toast object. You must call {@link #setView} before you
	* can call {@link #show}.
	*
	* @param context The context to use. Usually your {@link android.app.Application}
	* or {@link android.app.Activity} object.
	*/
	public Toast(Context context) {
	mContext = context;
	mTN = new TN(context.getPackageName());
	mTN.mY = context.getResources().getDimensionPixelSize(
	com.android.internal.R.dimen.toast_y_offset);
	mTN.mGravity = context.getResources().getInteger(
	com.android.internal.R.integer.config_toastDefaultGravity);
	}

	/**
	* Show the view for the specified duration.
	*/
	public void show() {
	if (mNextView == null) {
	throw new RuntimeException("setView must have been called");
	}

	INotificationManager service = getService();
	String pkg = mContext.getOpPackageName();
	TN tn = mTN;
	tn.mNextView = mNextView;

	try {
	service.enqueueToast(pkg, tn, mDuration);
	} catch (RemoteException e) {
	// Empty
	}
	}

	/**
	* Close the view if it's showing, or don't show it if it isn't showing yet.
	* You do not normally have to call this. Normally view will disappear on its own
	* after the appropriate duration.
	*/
	public void cancel() {
	mTN.cancel();
	}

	/**
	* Set the view to show.
	* @see #getView
	*/
	public void setView(View view) {
	mNextView = view;
	}

	/**
	* Return the view.
	* @see #setView
	*/
	public View getView() {
	return mNextView;
	}

	/**
	* Set how long to show the view for.
	* @see #LENGTH_SHORT
	* @see #LENGTH_LONG
	*/
	public void setDuration(@Duration int duration) {
	mDuration = duration;
	mTN.mDuration = duration;
	}

	/**
	* Return the duration.
	* @see #setDuration
	*/
	@Duration
	public int getDuration() {
	return mDuration;
	}

	/**
	* Set the margins of the view.
	*
	* @param horizontalMargin The horizontal margin, in percentage of the
	* container width, between the container's edges and the
	* notification
	* @param verticalMargin The vertical margin, in percentage of the
	* container height, between the container's edges and the
	* notification
	*/
	public void setMargin(float horizontalMargin, float verticalMargin) {
	mTN.mHorizontalMargin = horizontalMargin;
	mTN.mVerticalMargin = verticalMargin;
	}

	/**
	* Return the horizontal margin.
	*/
	public float getHorizontalMargin() {
	return mTN.mHorizontalMargin;
	}

	/**
	* Return the vertical margin.
	*/
	public float getVerticalMargin() {
	return mTN.mVerticalMargin;
	}

	/**
	* Set the location at which the notification should appear on the screen.
	* @see android.view.Gravity
	* @see #getGravity
	*/
	public void setGravity(int gravity, int xOffset, int yOffset) {
	mTN.mGravity = gravity;
	mTN.mX = xOffset;
	mTN.mY = yOffset;
	}

	/**
	* Get the location at which the notification should appear on the screen.
	* @see android.view.Gravity
	* @see #getGravity
	*/
	public int getGravity() {
	return mTN.mGravity;
	}

	/**
	* Return the X offset in pixels to apply to the gravity's location.
	*/
	public int getXOffset() {
	return mTN.mX;
	}

	/**
	* Return the Y offset in pixels to apply to the gravity's location.
	*/
	public int getYOffset() {
	return mTN.mY;
	}

	/**
	* Gets the LayoutParams for the Toast window.
	* @hide
	*/
	public WindowManager.LayoutParams getWindowParams() {
	return mTN.mParams;
	}

	/**
	* Make a standard toast that just contains a text view.
	*
	* @param context The context to use. Usually your {@link android.app.Application}
	* or {@link android.app.Activity} object.
	* @param text The text to show. Can be formatted text.
	* @param duration How long to display the message. Either {@link #LENGTH_SHORT} or
	* {@link #LENGTH_LONG}
	*
	*/
	public static Toast makeText(Context context, CharSequence text, @Duration int duration) {
	Toast result = new Toast(context);

	LayoutInflater inflate = (LayoutInflater)
	context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
	View v = inflate.inflate(com.android.internal.R.layout.transient_notification, null);
	TextView tv = (TextView)v.findViewById(com.android.internal.R.id.message);
	tv.setText(text);

	result.mNextView = v;
	result.mDuration = duration;

	return result;
	}

	/**
	* Make a standard toast that just contains a text view with the text from a resource.
	*
	* @param context The context to use. Usually your {@link android.app.Application}
	* or {@link android.app.Activity} object.
	* @param resId The resource id of the string resource to use. Can be formatted text.
	* @param duration How long to display the message. Either {@link #LENGTH_SHORT} or
	* {@link #LENGTH_LONG}
	*
	* @throws Resources.NotFoundException if the resource can't be found.
	*/
	public static Toast makeText(Context context, @StringRes int resId, @Duration int duration)
	throws Resources.NotFoundException {
	return makeText(context, context.getResources().getText(resId), duration);
	}

	/**
	* Update the text in a Toast that was previously created using one of the makeText() methods.
	* @param resId The new text for the Toast.
	*/
	public void setText(@StringRes int resId) {
	setText(mContext.getText(resId));
	}

	/**
	* Update the text in a Toast that was previously created using one of the makeText() methods.
	* @param s The new text for the Toast.
	*/
	public void setText(CharSequence s) {
	if (mNextView == null) {
	throw new RuntimeException("This Toast was not created with Toast.makeText()");
	}
	TextView tv = (TextView) mNextView.findViewById(com.android.internal.R.id.message);
	if (tv == null) {
	throw new RuntimeException("This Toast was not created with Toast.makeText()");
	}
	tv.setText(s);
	}

	// =======================================================================================
	// All the gunk below is the interaction with the Notification Service, which handles
	// the proper ordering of these system-wide.
	// =======================================================================================

	private static INotificationManager sService;

	static private INotificationManager getService() {
	if (sService != null) {
	return sService;
	}
	sService = INotificationManager.Stub.asInterface(ServiceManager.getService("notification"));
	return sService;
	}

	private static class TN extends ITransientNotification.Stub {
	final Runnable mHide = new Runnable() {
	@Override
	public void run() {
	}
	};

	private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();

	private static final int SHOW = 0;
	private static final int HIDE = 1;
	private static final int CANCEL = 2;
	final Handler mHandler = new Handler() {
	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case SHOW: {
	IBinder token = (IBinder) msg.obj;
	handleShow(token);
	break;
	}
	case HIDE: {
	handleHide();
	// Don't do this in handleHide() because it is also invoked by handleShow()
	mNextView = null;
	break;
	}
	case CANCEL: {
	handleHide();
	// Don't do this in handleHide() because it is also invoked by handleShow()
	mNextView = null;
	try {
	getService().cancelToast(mPackageName, TN.this);
	} catch (RemoteException e) {
	}
	break;
	}
	}
	}
	};

	int mGravity;
	int mX, mY;
	float mHorizontalMargin;
	float mVerticalMargin;


	View mView;
	View mNextView;
	int mDuration;

	WindowManager mWM;

	String mPackageName;

	static final long SHORT_DURATION_TIMEOUT = 5000;
	static final long LONG_DURATION_TIMEOUT = 1000;

	TN(String packageName) {
	// XXX This should be changed to use a Dialog, with a Theme.Toast
	// defined that sets up the layout params appropriately.
	final WindowManager.LayoutParams params = mParams;
	params.height = WindowManager.LayoutParams.WRAP_CONTENT;
	params.width = WindowManager.LayoutParams.WRAP_CONTENT;
	params.format = PixelFormat.TRANSLUCENT;
	params.windowAnimations = com.android.internal.R.style.Animation_Toast;
	params.type = WindowManager.LayoutParams.TYPE_TOAST;
	params.setTitle("Toast");
	params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
	\| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
	\| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

	mPackageName = packageName;
	}

	/**
	* schedule handleShow into the right thread
	*/
	@Override
	public void show(IBinder windowToken) {
	if (localLOGV) Log.v(TAG, "SHOW: " + this);
	mHandler.obtainMessage(SHOW, windowToken).sendToTarget();
	}

	/**
	* schedule handleHide into the right thread
	*/
	@Override
	public void hide() {
	if (localLOGV) Log.v(TAG, "HIDE: " + this);
	mHandler.obtainMessage(HIDE).sendToTarget();
	}

	public void cancel() {
	if (localLOGV) Log.v(TAG, "CANCEL: " + this);
	mHandler.obtainMessage(CANCEL).sendToTarget();
	}

	public void handleShow(IBinder windowToken) {
	if (localLOGV) Log.v(TAG, "HANDLE SHOW: " + this + " mView=" + mView
	+ " mNextView=" + mNextView);
	if (mView != mNextView) {
	// remove the old view if necessary
	handleHide();
	mView = mNextView;
	Context context = mView.getContext().getApplicationContext();
	String packageName = mView.getContext().getOpPackageName();
	if (context == null) {
	context = mView.getContext();
	}
	mWM = (WindowManager)context.getSystemService(Context.WINDOW_SERVICE);
	// We can resolve the Gravity here by using the Locale for getting
	// the layout direction
	final Configuration config = mView.getContext().getResources().getConfiguration();
	final int gravity = Gravity.getAbsoluteGravity(mGravity, config.getLayoutDirection());
	mParams.gravity = gravity;
	if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) {
	mParams.horizontalWeight = 1.0f;
	}
	if ((gravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) {
	mParams.verticalWeight = 1.0f;
	}
	mParams.x = mX;
	mParams.y = mY;
	mParams.verticalMargin = mVerticalMargin;
	mParams.horizontalMargin = mHorizontalMargin;
	mParams.packageName = packageName;
	mParams.hideTimeoutMilliseconds = mDuration ==
	Toast.LENGTH_LONG ? LONG_DURATION_TIMEOUT : SHORT_DURATION_TIMEOUT;
	mParams.token = windowToken;
	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);
	trySendAccessibilityEvent();
	}
	}

	private void trySendAccessibilityEvent() {
	AccessibilityManager accessibilityManager =
	AccessibilityManager.getInstance(mView.getContext());
	if (!accessibilityManager.isEnabled()) {
	return;
	}
	// treat toasts as notifications since they are used to
	// announce a transient piece of information to the user
	AccessibilityEvent event = AccessibilityEvent.obtain(
	AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
	event.setClassName(getClass().getName());
	event.setPackageName(mView.getContext().getPackageName());
	mView.dispatchPopulateAccessibilityEvent(event);
	accessibilityManager.sendAccessibilityEvent(event);
	}

	public void handleHide() {
	if (localLOGV) Log.v(TAG, "HANDLE HIDE: " + this + " mView=" + mView);
	if (mView != null) {
	// 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's try not to crash.
	if (mView.getParent() != null) {
	if (localLOGV) Log.v(TAG, "REMOVE! " + mView + " in " + this);
	mWM.removeViewImmediate(mView);
	}

	mView = null;
	}
	}
	}
	}