/*
* 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.app.INotificationManager;
//import android.app.ITransientNotification;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.PixelFormat;
import android.os.Handler;
//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.Window;
import android.view.WindowManager;
import android.view.WindowManagerImpl;
/**
* 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.
*/
public class Toast {
static final String TAG = "Toast";
static final boolean localLOGV = false;
/**
* 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;
private static final int LONG_DELAY = 3500; // 3.5 seconds
private static final int SHORT_DELAY = 2000; // 2 seconds
final Handler mHandler = new Handler();
final Context mContext;
final TN mTN;
int mDuration;
int mGravity = Gravity.CENTER_HORIZONTAL | Gravity.BOTTOM;
int mX, mY;
float mHorizontalMargin;
float mVerticalMargin;
View mView;
View mNextView;
Window mWindow;
View mDecor;
/**
* 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) {
if (context == null) {
throw new NullPointerException("Toast.Toast -> context is null");
}
mContext = context;
mTN = new TN();
mY = context.getResources().getDimensionPixelSize(
com.android.internal.R.dimen.toast_y_offset);
WindowManager mWindowManager = (WindowManagerImpl)WindowManagerImpl.getDefault();
Window w = new Window(mContext);
w.removeBackKeyInLocalFeature();
mWindow = w;
//w.setCallback(this);
w.setWindowManager(mWindowManager, null, null);
w.setGravity(Gravity.CENTER);
}
/**
* 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.getPackageName();
TN tn = mTN;
tn.show();
// 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.hide();
// TODO this still needs to cancel the inflight notification if any
}
/**
* Set the view to show.
* @see #getView
*/
public void setView(View view) {
mNextView = view;
mWindow.setContentView(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(int duration) {
mDuration = duration;
}
/**
* Return the duration.
* @see #setDuration
*/
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) {
mHorizontalMargin = horizontalMargin;
mVerticalMargin = verticalMargin;
}
/**
* Return the horizontal margin.
*/
public float getHorizontalMargin() {
return mHorizontalMargin;
}
/**
* Return the vertical margin.
*/
public float getVerticalMargin() {
return 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) {
mGravity = gravity;
mX = xOffset;
mY = yOffset;
}
/**
* Get the location at which the notification should appear on the screen.
* @see android.view.Gravity
* @see #getGravity
*/
public int getGravity() {
return mGravity;
}
/**
* Return the X offset in pixels to apply to the gravity's location.
*/
public int getXOffset() {
return mX;
}
/**
* Return the Y offset in pixels to apply to the gravity's location.
*/
public int getYOffset() {
return mY;
}
/**
* 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, int resId, int duration) {
if (context == null) {
throw new NullPointerException("Toast.makeText -> context is null");
}
CharSequence text = context.getResources().getText(resId);
if (text == null) {
return makeText(context, "", duration);
} else {
return makeText(context, text, duration);
}
}
/**
* 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, 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.setView(v);
result.mDuration = duration;
return result;
}
/**
* 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(int resId) {
if (mContext == null) {
throw new NullPointerException("Toast.setText -> mContext is null");
}
CharSequence text = mContext.getText(resId);
if(text == null) {
setText("");
} else {
setText(text);
}
}
/**
* 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 class TN /*extends ITransientNotification.Stub*/ {
final Runnable mShow = new Runnable() {
public void run() {
handleShow();
}
};
final Runnable mHide = new Runnable() {
public void run() {
handleHide();
}
};
private final WindowManager.LayoutParams mParams = new WindowManager.LayoutParams();
WindowManagerImpl mWM;
TN() {
// 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.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
params.format = PixelFormat.TRANSLUCENT;
params.windowAnimations = com.android.internal.R.style.Animation_Toast;
params.type = WindowManager.LayoutParams.TYPE_TOAST;
params.setTitle("Toast");
}
/**
* schedule handleShow into the right thread
*/
public void show() {
if (localLOGV) Log.v(TAG, "SHOW: " + this);
mHandler.post(mShow);
// We will destroy it after duration
long delay = (mDuration == Toast.LENGTH_LONG ? LONG_DELAY : SHORT_DELAY);
mHandler.postDelayed(mHide, delay);
}
/**
* schedule handleHide into the right thread
*/
public void hide() {
if (localLOGV) Log.v(TAG, "HIDE: " + this);
mHandler.post(mHide);
}
public void handleShow() {
if (localLOGV) Log.v(TAG, "HANDLE SHOW: " + this + " mView=" + mView
+ " mNextView=" + mNextView);
mDecor = mWindow.getDecorView();
if (mView != mNextView) {
// remove the old view if necessary
handleHide();
mView = mNextView;
mWM = WindowManagerImpl.getDefault();
final int gravity = mGravity;
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;
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);
// MayLoon added
mDecor = mWindow.getDecorView();
// Let the Toast on top of the current Activity.
mDecor.zIndex = mContext.getActivityManager().mCurActivity.mZIndex;
if (mParams.gravity == Gravity.FILL) {
mDecor.alpha = 0.0f;
}
mWM.addView(mDecor, mParams);
mDecor.setVisibility(View.VISIBLE);
}
}
public void handleHide() {
if (localLOGV) Log.v(TAG, "HANDLE HIDE: " + this + " mView=" + mView);
mDecor = mWindow.getDecorView();
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.removeView(mView);
mWM.removeView(mDecor);
}
mView = null;
}
}
}
}