416 lines
14 KiB
Java
416 lines
14 KiB
Java
/*
|
|
* Copyright (C) 2008 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.appwidget;
|
|
|
|
import android.content.Context;
|
|
import android.content.pm.PackageManager;
|
|
import android.content.pm.PackageManager.NameNotFoundException;
|
|
import android.graphics.Bitmap;
|
|
import android.graphics.Canvas;
|
|
import android.graphics.Color;
|
|
import android.graphics.Paint;
|
|
import android.os.SystemClock;
|
|
import android.os.Parcelable;
|
|
import android.os.Parcel;
|
|
import android.util.AttributeSet;
|
|
import android.util.Log;
|
|
import android.util.SparseArray;
|
|
import android.view.Gravity;
|
|
import android.view.LayoutInflater;
|
|
import android.view.View;
|
|
import android.widget.FrameLayout;
|
|
import android.widget.RemoteViews;
|
|
import android.widget.TextView;
|
|
|
|
/**
|
|
* Provides the glue to show AppWidget views. This class offers automatic animation
|
|
* between updates, and will try recycling old views for each incoming
|
|
* {@link RemoteViews}.
|
|
*/
|
|
public class AppWidgetHostView extends FrameLayout {
|
|
static final String TAG = "AppWidgetHostView";
|
|
static final boolean LOGD = false;
|
|
static final boolean CROSSFADE = false;
|
|
|
|
static final int VIEW_MODE_NOINIT = 0;
|
|
static final int VIEW_MODE_CONTENT = 1;
|
|
static final int VIEW_MODE_ERROR = 2;
|
|
static final int VIEW_MODE_DEFAULT = 3;
|
|
|
|
static final int FADE_DURATION = 1000;
|
|
|
|
// When we're inflating the initialLayout for a AppWidget, we only allow
|
|
// views that are allowed in RemoteViews.
|
|
static final LayoutInflater.Filter sInflaterFilter = new LayoutInflater.Filter() {
|
|
public boolean onLoadClass(Class clazz) {
|
|
return clazz.isAnnotationPresent(RemoteViews.RemoteView.class);
|
|
}
|
|
};
|
|
|
|
Context mContext;
|
|
Context mRemoteContext;
|
|
|
|
int mAppWidgetId;
|
|
AppWidgetProviderInfo mInfo;
|
|
View mView;
|
|
int mViewMode = VIEW_MODE_NOINIT;
|
|
int mLayoutId = -1;
|
|
long mFadeStartTime = -1;
|
|
Bitmap mOld;
|
|
Paint mOldPaint = new Paint();
|
|
|
|
/**
|
|
* Create a host view. Uses default fade animations.
|
|
*/
|
|
public AppWidgetHostView(Context context) {
|
|
this(context, android.R.anim.fade_in, android.R.anim.fade_out);
|
|
}
|
|
|
|
/**
|
|
* Create a host view. Uses specified animations when pushing
|
|
* {@link #updateAppWidget(RemoteViews)}.
|
|
*
|
|
* @param animationIn Resource ID of in animation to use
|
|
* @param animationOut Resource ID of out animation to use
|
|
*/
|
|
@SuppressWarnings({"UnusedDeclaration"})
|
|
public AppWidgetHostView(Context context, int animationIn, int animationOut) {
|
|
super(context);
|
|
mContext = context;
|
|
}
|
|
|
|
/**
|
|
* Set the AppWidget that will be displayed by this view.
|
|
*/
|
|
public void setAppWidget(int appWidgetId, AppWidgetProviderInfo info) {
|
|
mAppWidgetId = appWidgetId;
|
|
mInfo = info;
|
|
}
|
|
|
|
public int getAppWidgetId() {
|
|
return mAppWidgetId;
|
|
}
|
|
|
|
public AppWidgetProviderInfo getAppWidgetInfo() {
|
|
return mInfo;
|
|
}
|
|
|
|
@Override
|
|
protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) {
|
|
final ParcelableSparseArray jail = new ParcelableSparseArray();
|
|
super.dispatchSaveInstanceState(jail);
|
|
container.put(generateId(), jail);
|
|
}
|
|
|
|
private int generateId() {
|
|
final int id = getId();
|
|
return id == View.NO_ID ? mAppWidgetId : id;
|
|
}
|
|
|
|
@Override
|
|
protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
|
|
final Parcelable parcelable = container.get(generateId());
|
|
|
|
ParcelableSparseArray jail = null;
|
|
if (parcelable != null && parcelable instanceof ParcelableSparseArray) {
|
|
jail = (ParcelableSparseArray) parcelable;
|
|
}
|
|
|
|
if (jail == null) jail = new ParcelableSparseArray();
|
|
|
|
super.dispatchRestoreInstanceState(jail);
|
|
}
|
|
|
|
/** {@inheritDoc} */
|
|
@Override
|
|
public LayoutParams generateLayoutParams(AttributeSet attrs) {
|
|
// We're being asked to inflate parameters, probably by a LayoutInflater
|
|
// in a remote Context. To help resolve any remote references, we
|
|
// inflate through our last mRemoteContext when it exists.
|
|
final Context context = mRemoteContext != null ? mRemoteContext : mContext;
|
|
return new FrameLayout.LayoutParams(context, attrs);
|
|
}
|
|
|
|
/**
|
|
* Update the AppWidgetProviderInfo for this view, and reset it to the
|
|
* initial layout.
|
|
*/
|
|
void resetAppWidget(AppWidgetProviderInfo info) {
|
|
mInfo = info;
|
|
mViewMode = VIEW_MODE_NOINIT;
|
|
updateAppWidget(null);
|
|
}
|
|
|
|
/**
|
|
* Process a set of {@link RemoteViews} coming in as an update from the
|
|
* AppWidget provider. Will animate into these new views as needed
|
|
*/
|
|
public void updateAppWidget(RemoteViews remoteViews) {
|
|
if (LOGD) Log.d(TAG, "updateAppWidget called mOld=" + mOld);
|
|
|
|
boolean recycled = false;
|
|
View content = null;
|
|
Exception exception = null;
|
|
|
|
// Capture the old view into a bitmap so we can do the crossfade.
|
|
if (CROSSFADE) {
|
|
if (mFadeStartTime < 0) {
|
|
if (mView != null) {
|
|
final int width = mView.getWidth();
|
|
final int height = mView.getHeight();
|
|
try {
|
|
mOld = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
|
|
} catch (OutOfMemoryError e) {
|
|
// we just won't do the fade
|
|
mOld = null;
|
|
}
|
|
if (mOld != null) {
|
|
//mView.drawIntoBitmap(mOld);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (remoteViews == null) {
|
|
if (mViewMode == VIEW_MODE_DEFAULT) {
|
|
// We've already done this -- nothing to do.
|
|
return;
|
|
}
|
|
content = getDefaultView();
|
|
mLayoutId = -1;
|
|
mViewMode = VIEW_MODE_DEFAULT;
|
|
} else {
|
|
// Prepare a local reference to the remote Context so we're ready to
|
|
// inflate any requested LayoutParams.
|
|
mRemoteContext = getRemoteContext(remoteViews);
|
|
int layoutId = remoteViews.getLayoutId();
|
|
|
|
// If our stale view has been prepared to match active, and the new
|
|
// layout matches, try recycling it
|
|
if (content == null && layoutId == mLayoutId) {
|
|
try {
|
|
remoteViews.reapply(mContext, mView);
|
|
content = mView;
|
|
recycled = true;
|
|
if (LOGD) Log.d(TAG, "was able to recycled existing layout");
|
|
} catch (RuntimeException e) {
|
|
exception = e;
|
|
}
|
|
}
|
|
|
|
// Try normal RemoteView inflation
|
|
if (content == null) {
|
|
try {
|
|
content = remoteViews.apply(mContext, this);
|
|
if (LOGD) Log.d(TAG, "had to inflate new layout");
|
|
} catch (RuntimeException e) {
|
|
exception = e;
|
|
}
|
|
}
|
|
|
|
mLayoutId = layoutId;
|
|
mViewMode = VIEW_MODE_CONTENT;
|
|
}
|
|
|
|
if (content == null) {
|
|
if (mViewMode == VIEW_MODE_ERROR) {
|
|
// We've already done this -- nothing to do.
|
|
return ;
|
|
}
|
|
Log.w(TAG, "updateAppWidget couldn't find any view, using error view", exception);
|
|
content = getErrorView();
|
|
mViewMode = VIEW_MODE_ERROR;
|
|
}
|
|
|
|
if (!recycled) {
|
|
prepareView(content);
|
|
addView(content);
|
|
}
|
|
|
|
if (mView != content) {
|
|
removeView(mView);
|
|
mView = content;
|
|
}
|
|
|
|
if (CROSSFADE) {
|
|
if (mFadeStartTime < 0) {
|
|
// if there is already an animation in progress, don't do anything --
|
|
// the new view will pop in on top of the old one during the cross fade,
|
|
// and that looks okay.
|
|
mFadeStartTime = SystemClock.uptimeMillis();
|
|
invalidate();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Build a {@link Context} cloned into another package name, usually for the
|
|
* purposes of reading remote resources.
|
|
*/
|
|
private Context getRemoteContext(RemoteViews views) {
|
|
// Bail if missing package name
|
|
final String packageName = views.getPackage();
|
|
if (packageName == null) return mContext;
|
|
|
|
try {
|
|
// Return if cloned successfully, otherwise default
|
|
return mContext.createPackageContext(packageName, Context.CONTEXT_RESTRICTED);
|
|
} catch (NameNotFoundException e) {
|
|
Log.e(TAG, "Package name " + packageName + " not found");
|
|
return mContext;
|
|
}
|
|
}
|
|
|
|
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
|
|
if (CROSSFADE) {
|
|
int alpha;
|
|
int l = child.getLeft();
|
|
int t = child.getTop();
|
|
if (mFadeStartTime > 0) {
|
|
alpha = (int)(((drawingTime-mFadeStartTime)*255)/FADE_DURATION);
|
|
if (alpha > 255) {
|
|
alpha = 255;
|
|
}
|
|
Log.d(TAG, "drawChild alpha=" + alpha + " l=" + l + " t=" + t
|
|
+ " w=" + child.getWidth());
|
|
if (alpha != 255 && mOld != null) {
|
|
mOldPaint.setAlpha(255-alpha);
|
|
//canvas.drawBitmap(mOld, l, t, mOldPaint);
|
|
}
|
|
} else {
|
|
alpha = 255;
|
|
}
|
|
int restoreTo = canvas.saveLayerAlpha(l, t, child.getWidth(), child.getHeight(), alpha,
|
|
Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG);
|
|
boolean rv = super.drawChild(canvas, child, drawingTime);
|
|
canvas.restoreToCount(restoreTo);
|
|
if (alpha < 255) {
|
|
invalidate();
|
|
} else {
|
|
mFadeStartTime = -1;
|
|
if (mOld != null) {
|
|
mOld.recycle();
|
|
mOld = null;
|
|
}
|
|
}
|
|
return rv;
|
|
} else {
|
|
return super.drawChild(canvas, child, drawingTime);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prepare the given view to be shown. This might include adjusting
|
|
* {@link FrameLayout.LayoutParams} before inserting.
|
|
*/
|
|
protected void prepareView(View view) {
|
|
// Take requested dimensions from child, but apply default gravity.
|
|
FrameLayout.LayoutParams requested = (FrameLayout.LayoutParams)view.getLayoutParams();
|
|
if (requested == null) {
|
|
requested = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT,
|
|
LayoutParams.MATCH_PARENT);
|
|
}
|
|
|
|
requested.gravity = Gravity.CENTER;
|
|
view.setLayoutParams(requested);
|
|
}
|
|
|
|
/**
|
|
* Inflate and return the default layout requested by AppWidget provider.
|
|
*/
|
|
protected View getDefaultView() {
|
|
if (LOGD) {
|
|
Log.d(TAG, "getDefaultView");
|
|
}
|
|
View defaultView = null;
|
|
Exception exception = null;
|
|
|
|
try {
|
|
if (mInfo != null) {
|
|
Context theirContext = mContext.createPackageContext(
|
|
mInfo.provider.getPackageName(), Context.CONTEXT_RESTRICTED);
|
|
mRemoteContext = theirContext;
|
|
LayoutInflater inflater = (LayoutInflater)
|
|
theirContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
|
|
inflater = inflater.cloneInContext(theirContext);
|
|
inflater.setFilter(sInflaterFilter);
|
|
defaultView = inflater.inflate(mInfo.initialLayout, this, false);
|
|
} else {
|
|
Log.w(TAG, "can't inflate defaultView because mInfo is missing");
|
|
}
|
|
} catch (PackageManager.NameNotFoundException e) {
|
|
exception = e;
|
|
} catch (RuntimeException e) {
|
|
exception = e;
|
|
}
|
|
|
|
if (exception != null) {
|
|
Log.w(TAG, "Error inflating AppWidget " + mInfo + ": " + exception.toString());
|
|
}
|
|
|
|
if (defaultView == null) {
|
|
if (LOGD) Log.d(TAG, "getDefaultView couldn't find any view, so inflating error");
|
|
defaultView = getErrorView();
|
|
}
|
|
|
|
return defaultView;
|
|
}
|
|
|
|
/**
|
|
* Inflate and return a view that represents an error state.
|
|
*/
|
|
protected View getErrorView() {
|
|
TextView tv = new TextView(mContext);
|
|
tv.setText(com.android.internal.R.string.gadget_host_error_inflating);
|
|
// TODO: get this color from somewhere.
|
|
tv.setBackgroundColor(Color.argb(127, 0, 0, 0));
|
|
return tv;
|
|
}
|
|
|
|
private static class ParcelableSparseArray extends SparseArray<Parcelable> implements Parcelable {
|
|
public int describeContents() {
|
|
return 0;
|
|
}
|
|
|
|
public void writeToParcel(Parcel dest, int flags) {
|
|
final int count = size();
|
|
dest.writeInt(count);
|
|
for (int i = 0; i < count; i++) {
|
|
dest.writeInt(keyAt(i));
|
|
dest.writeParcelable(valueAt(i), 0);
|
|
}
|
|
}
|
|
|
|
public static final Parcelable.Creator<ParcelableSparseArray> CREATOR =
|
|
new Parcelable.Creator<ParcelableSparseArray>() {
|
|
public ParcelableSparseArray createFromParcel(Parcel source) {
|
|
final ParcelableSparseArray array = new ParcelableSparseArray();
|
|
final ClassLoader loader = array.getClass().getClassLoader();
|
|
final int count = source.readInt();
|
|
for (int i = 0; i < count; i++) {
|
|
array.put(source.readInt(), source.readParcelable(loader));
|
|
}
|
|
return array;
|
|
}
|
|
|
|
public ParcelableSparseArray[] newArray(int size) {
|
|
return new ParcelableSparseArray[size];
|
|
}
|
|
};
|
|
}
|
|
}
|