/* * Copyright (C) 2010 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 com.android.layoutlib.bridge.impl; import static com.android.ide.common.rendering.api.Result.Status.ERROR_ANIM_NOT_FOUND; import static com.android.ide.common.rendering.api.Result.Status.ERROR_INFLATION; import static com.android.ide.common.rendering.api.Result.Status.ERROR_NOT_INFLATED; import static com.android.ide.common.rendering.api.Result.Status.ERROR_UNKNOWN; import static com.android.ide.common.rendering.api.Result.Status.ERROR_VIEWGROUP_NO_CHILDREN; import static com.android.ide.common.rendering.api.Result.Status.SUCCESS; import com.android.ide.common.rendering.api.AdapterBinding; import com.android.ide.common.rendering.api.IAnimationListener; import com.android.ide.common.rendering.api.ILayoutPullParser; import com.android.ide.common.rendering.api.IProjectCallback; import com.android.ide.common.rendering.api.RenderParams; import com.android.ide.common.rendering.api.RenderResources; import com.android.ide.common.rendering.api.RenderSession; import com.android.ide.common.rendering.api.ResourceReference; import com.android.ide.common.rendering.api.ResourceValue; import com.android.ide.common.rendering.api.Result; import com.android.ide.common.rendering.api.SessionParams; import com.android.ide.common.rendering.api.ViewInfo; import com.android.ide.common.rendering.api.Result.Status; import com.android.ide.common.rendering.api.SessionParams.RenderingMode; import com.android.internal.util.XmlUtils; import com.android.layoutlib.bridge.Bridge; import com.android.layoutlib.bridge.android.BridgeContext; import com.android.layoutlib.bridge.android.BridgeLayoutParamsMapAttributes; import com.android.layoutlib.bridge.android.BridgeXmlBlockParser; import com.android.layoutlib.bridge.bars.FakeActionBar; import com.android.layoutlib.bridge.bars.PhoneSystemBar; import com.android.layoutlib.bridge.bars.TabletSystemBar; import com.android.layoutlib.bridge.bars.TitleBar; import com.android.layoutlib.bridge.impl.binding.FakeAdapter; import com.android.layoutlib.bridge.impl.binding.FakeExpandableAdapter; import com.android.resources.ResourceType; import com.android.resources.ScreenSize; import com.android.util.Pair; import org.xmlpull.v1.XmlPullParserException; import android.animation.AnimationThread; import android.animation.Animator; import android.animation.AnimatorInflater; import android.animation.LayoutTransition; import android.animation.LayoutTransition.TransitionListener; import android.app.Fragment_Delegate; import android.graphics.Bitmap; import android.graphics.Bitmap_Delegate; import android.graphics.Canvas; import android.graphics.drawable.Drawable; import android.util.DisplayMetrics; import android.util.TypedValue; import android.view.AttachInfo_Accessor; import android.view.BridgeInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.MeasureSpec; import android.view.ViewGroup.LayoutParams; import android.view.ViewGroup.MarginLayoutParams; import android.widget.AbsListView; import android.widget.AbsSpinner; import android.widget.AdapterView; import android.widget.ExpandableListView; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.QuickContactBadge; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TabHost.TabSpec; import java.awt.AlphaComposite; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * Class implementing the render session. * * A session is a stateful representation of a layout file. It is initialized with data coming * through the {@link Bridge} API to inflate the layout. Further actions and rendering can then * be done on the layout. * */ public class RenderSessionImpl extends RenderAction { private static final int DEFAULT_TITLE_BAR_HEIGHT = 25; private static final int DEFAULT_STATUS_BAR_HEIGHT = 25; // scene state private RenderSession mScene; private BridgeXmlBlockParser mBlockParser; private BridgeInflater mInflater; private ResourceValue mWindowBackground; private ViewGroup mViewRoot; private FrameLayout mContentRoot; private Canvas mCanvas; private int mMeasuredScreenWidth = -1; private int mMeasuredScreenHeight = -1; private boolean mIsAlphaChannelImage; private boolean mWindowIsFloating; private int mStatusBarSize; private int mSystemBarSize; private int mTitleBarSize; private int mActionBarSize; // information being returned through the API private BufferedImage mImage; private List mViewInfoList; private static final class PostInflateException extends Exception { private static final long serialVersionUID = 1L; public PostInflateException(String message) { super(message); } } /** * Creates a layout scene with all the information coming from the layout bridge API. *

* This must be followed by a call to {@link RenderSessionImpl#init()}, which act as a * call to {@link RenderSessionImpl#acquire(long)} * * @see LayoutBridge#createScene(com.android.layoutlib.api.SceneParams) */ public RenderSessionImpl(SessionParams params) { super(new SessionParams(params)); } /** * Initializes and acquires the scene, creating various Android objects such as context, * inflater, and parser. * * @param timeout the time to wait if another rendering is happening. * * @return whether the scene was prepared * * @see #acquire(long) * @see #release() */ @Override public Result init(long timeout) { Result result = super.init(timeout); if (result.isSuccess() == false) { return result; } SessionParams params = getParams(); BridgeContext context = getContext(); RenderResources resources = getParams().getResources(); DisplayMetrics metrics = getContext().getMetrics(); // use default of true in case it's not found to use alpha by default mIsAlphaChannelImage = getBooleanThemeValue(resources, "windowIsFloating", true /*defaultValue*/); mWindowIsFloating = getBooleanThemeValue(resources, "windowIsFloating", true /*defaultValue*/); findBackground(resources); findStatusBar(resources, metrics); findActionBar(resources, metrics); findSystemBar(resources, metrics); // build the inflater and parser. mInflater = new BridgeInflater(context, params.getProjectCallback()); context.setBridgeInflater(mInflater); mBlockParser = new BridgeXmlBlockParser( params.getLayoutDescription(), context, false /* platformResourceFlag */); return SUCCESS.createResult(); } /** * Inflates the layout. *

* {@link #acquire(long)} must have been called before this. * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #init(long)} was not called. */ public Result inflate() { checkLock(); try { SessionParams params = getParams(); BridgeContext context = getContext(); // the view group that receives the window background. ViewGroup backgroundView = null; if (mWindowIsFloating || params.isForceNoDecor()) { backgroundView = mViewRoot = mContentRoot = new FrameLayout(context); } else { /* * we're creating the following layout * +-------------------------------------------------+ | System bar (only in phone UI) | +-------------------------------------------------+ | (Layout with background drawable) | | +---------------------------------------------+ | | | Title/Action bar (optional) | | | +---------------------------------------------+ | | | Content, vertical extending | | | | | | | +---------------------------------------------+ | +-------------------------------------------------+ | System bar (only in tablet UI) | +-------------------------------------------------+ */ LinearLayout topLayout = new LinearLayout(context); mViewRoot = topLayout; topLayout.setOrientation(LinearLayout.VERTICAL); if (mStatusBarSize > 0) { // system bar try { PhoneSystemBar systemBar = new PhoneSystemBar(context, params.getDensity()); systemBar.setLayoutParams( new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, mStatusBarSize)); topLayout.addView(systemBar); } catch (XmlPullParserException e) { } } LinearLayout backgroundLayout = new LinearLayout(context); backgroundView = backgroundLayout; backgroundLayout.setOrientation(LinearLayout.VERTICAL); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); layoutParams.weight = 1; backgroundLayout.setLayoutParams(layoutParams); topLayout.addView(backgroundLayout); // if the theme says no title/action bar, then the size will be 0 if (mActionBarSize > 0) { try { FakeActionBar actionBar = new FakeActionBar(context, params.getDensity(), params.getAppLabel(), params.getAppIcon()); actionBar.setLayoutParams( new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, mActionBarSize)); backgroundLayout.addView(actionBar); } catch (XmlPullParserException e) { } } else if (mTitleBarSize > 0) { try { TitleBar titleBar = new TitleBar(context, params.getDensity(), params.getAppLabel()); titleBar.setLayoutParams( new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, mTitleBarSize)); backgroundLayout.addView(titleBar); } catch (XmlPullParserException e) { } } // content frame mContentRoot = new FrameLayout(context); layoutParams = new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT); layoutParams.weight = 1; mContentRoot.setLayoutParams(layoutParams); backgroundLayout.addView(mContentRoot); if (mSystemBarSize > 0) { // system bar try { TabletSystemBar systemBar = new TabletSystemBar(context, params.getDensity()); systemBar.setLayoutParams( new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, mSystemBarSize)); topLayout.addView(systemBar); } catch (XmlPullParserException e) { } } } // Sets the project callback (custom view loader) to the fragment delegate so that // it can instantiate the custom Fragment. Fragment_Delegate.setProjectCallback(params.getProjectCallback()); View view = mInflater.inflate(mBlockParser, mContentRoot); // done with the parser, pop it. context.popParser(); Fragment_Delegate.setProjectCallback(null); // set the AttachInfo on the root view. AttachInfo_Accessor.setAttachInfo(mViewRoot); // post-inflate process. For now this supports TabHost/TabWidget postInflateProcess(view, params.getProjectCallback()); // get the background drawable if (mWindowBackground != null && backgroundView != null) { Drawable d = ResourceHelper.getDrawable(mWindowBackground, context); backgroundView.setBackgroundDrawable(d); } return SUCCESS.createResult(); } catch (PostInflateException e) { return ERROR_INFLATION.createResult(e.getMessage(), e); } catch (Throwable e) { // get the real cause of the exception. Throwable t = e; while (t.getCause() != null) { t = t.getCause(); } return ERROR_INFLATION.createResult(t.getMessage(), t); } } /** * Renders the scene. *

* {@link #acquire(long)} must have been called before this. * * @param freshRender whether the render is a new one and should erase the existing bitmap (in * the case where bitmaps are reused). This is typically needed when not playing * animations.) * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #acquire(long)} was not called. * * @see RenderParams#getRenderingMode() * @see RenderSession#render(long) */ public Result render(boolean freshRender) { checkLock(); SessionParams params = getParams(); try { if (mViewRoot == null) { return ERROR_NOT_INFLATED.createResult(); } RenderingMode renderingMode = params.getRenderingMode(); // only do the screen measure when needed. boolean newRenderSize = false; if (mMeasuredScreenWidth == -1) { newRenderSize = true; mMeasuredScreenWidth = params.getScreenWidth(); mMeasuredScreenHeight = params.getScreenHeight(); if (renderingMode != RenderingMode.NORMAL) { int widthMeasureSpecMode = renderingMode.isHorizExpand() ? MeasureSpec.UNSPECIFIED // this lets us know the actual needed size : MeasureSpec.EXACTLY; int heightMeasureSpecMode = renderingMode.isVertExpand() ? MeasureSpec.UNSPECIFIED // this lets us know the actual needed size : MeasureSpec.EXACTLY; // We used to compare the measured size of the content to the screen size but // this does not work anymore due to the 2 following issues: // - If the content is in a decor (system bar, title/action bar), the root view // will not resize even with the UNSPECIFIED because of the embedded layout. // - If there is no decor, but a dialog frame, then the dialog padding prevents // comparing the size of the content to the screen frame (as it would not // take into account the dialog padding). // The solution is to first get the content size in a normal rendering, inside // the decor or the dialog padding. // Then measure only the content with UNSPECIFIED to see the size difference // and apply this to the screen size. // first measure the full layout, with EXACTLY to get the size of the // content as it is inside the decor/dialog Pair exactMeasure = measureView( mViewRoot, mContentRoot.getChildAt(0), mMeasuredScreenWidth, MeasureSpec.EXACTLY, mMeasuredScreenHeight, MeasureSpec.EXACTLY); // now measure the content only using UNSPECIFIED (where applicable, based on // the rendering mode). This will give us the size the content needs. Pair result = measureView( mContentRoot, mContentRoot.getChildAt(0), mMeasuredScreenWidth, widthMeasureSpecMode, mMeasuredScreenHeight, heightMeasureSpecMode); // now look at the difference and add what is needed. if (renderingMode.isHorizExpand()) { int measuredWidth = exactMeasure.getFirst(); int neededWidth = result.getFirst(); if (neededWidth > measuredWidth) { mMeasuredScreenWidth += neededWidth - measuredWidth; } } if (renderingMode.isVertExpand()) { int measuredHeight = exactMeasure.getSecond(); int neededHeight = result.getSecond(); if (neededHeight > measuredHeight) { mMeasuredScreenHeight += neededHeight - measuredHeight; } } } } // measure again with the size we need // This must always be done before the call to layout measureView(mViewRoot, null /*measuredView*/, mMeasuredScreenWidth, MeasureSpec.EXACTLY, mMeasuredScreenHeight, MeasureSpec.EXACTLY); // now do the layout. mViewRoot.layout(0, 0, mMeasuredScreenWidth, mMeasuredScreenHeight); if (params.isLayoutOnly()) { // delete the canvas and image to reset them on the next full rendering mImage = null; mCanvas = null; } else { AttachInfo_Accessor.dispatchOnPreDraw(mViewRoot); // draw the views // create the BufferedImage into which the layout will be rendered. boolean newImage = false; if (newRenderSize || mCanvas == null) { if (params.getImageFactory() != null) { mImage = params.getImageFactory().getImage( mMeasuredScreenWidth, mMeasuredScreenHeight); } else { mImage = new BufferedImage( mMeasuredScreenWidth, mMeasuredScreenHeight, BufferedImage.TYPE_INT_ARGB); newImage = true; } if (params.isBgColorOverridden()) { // since we override the content, it's the same as if it was a new image. newImage = true; Graphics2D gc = mImage.createGraphics(); gc.setColor(new Color(params.getOverrideBgColor(), true)); gc.setComposite(AlphaComposite.Src); gc.fillRect(0, 0, mMeasuredScreenWidth, mMeasuredScreenHeight); gc.dispose(); } // create an Android bitmap around the BufferedImage Bitmap bitmap = Bitmap_Delegate.createBitmap(mImage, true /*isMutable*/, params.getDensity()); // create a Canvas around the Android bitmap mCanvas = new Canvas(bitmap); mCanvas.setDensity(params.getDensity().getDpiValue()); } if (freshRender && newImage == false) { Graphics2D gc = mImage.createGraphics(); gc.setComposite(AlphaComposite.Src); gc.setColor(new Color(0x00000000, true)); gc.fillRect(0, 0, mMeasuredScreenWidth, mMeasuredScreenHeight); // done gc.dispose(); } mViewRoot.draw(mCanvas); } mViewInfoList = startVisitingViews(mViewRoot, 0, params.getExtendedViewInfoMode()); // success! return SUCCESS.createResult(); } catch (Throwable e) { // get the real cause of the exception. Throwable t = e; while (t.getCause() != null) { t = t.getCause(); } return ERROR_UNKNOWN.createResult(t.getMessage(), t); } } /** * Executes {@link View#measure(int, int)} on a given view with the given parameters (used * to create measure specs with {@link MeasureSpec#makeMeasureSpec(int, int)}. * * if measuredView is non null, the method returns a {@link Pair} of (width, height) * for the view (using {@link View#getMeasuredWidth()} and {@link View#getMeasuredHeight()}). * * @param viewToMeasure the view on which to execute measure(). * @param measuredView if non null, the view to query for its measured width/height. * @param width the width to use in the MeasureSpec. * @param widthMode the MeasureSpec mode to use for the width. * @param height the height to use in the MeasureSpec. * @param heightMode the MeasureSpec mode to use for the height. * @return the measured width/height if measuredView is non-null, null otherwise. */ private Pair measureView(ViewGroup viewToMeasure, View measuredView, int width, int widthMode, int height, int heightMode) { int w_spec = MeasureSpec.makeMeasureSpec(width, widthMode); int h_spec = MeasureSpec.makeMeasureSpec(height, heightMode); viewToMeasure.measure(w_spec, h_spec); if (measuredView != null) { return Pair.of(measuredView.getMeasuredWidth(), measuredView.getMeasuredHeight()); } return null; } /** * Animate an object *

* {@link #acquire(long)} must have been called before this. * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #acquire(long)} was not called. * * @see RenderSession#animate(Object, String, boolean, IAnimationListener) */ public Result animate(Object targetObject, String animationName, boolean isFrameworkAnimation, IAnimationListener listener) { checkLock(); BridgeContext context = getContext(); // find the animation file. ResourceValue animationResource = null; int animationId = 0; if (isFrameworkAnimation) { animationResource = context.getRenderResources().getFrameworkResource( ResourceType.ANIMATOR, animationName); if (animationResource != null) { animationId = Bridge.getResourceId(ResourceType.ANIMATOR, animationName); } } else { animationResource = context.getRenderResources().getProjectResource( ResourceType.ANIMATOR, animationName); if (animationResource != null) { animationId = context.getProjectCallback().getResourceId( ResourceType.ANIMATOR, animationName); } } if (animationResource != null) { try { Animator anim = AnimatorInflater.loadAnimator(context, animationId); if (anim != null) { anim.setTarget(targetObject); new PlayAnimationThread(anim, this, animationName, listener).start(); return SUCCESS.createResult(); } } catch (Exception e) { // get the real cause of the exception. Throwable t = e; while (t.getCause() != null) { t = t.getCause(); } return ERROR_UNKNOWN.createResult(t.getMessage(), t); } } return ERROR_ANIM_NOT_FOUND.createResult(); } /** * Insert a new child into an existing parent. *

* {@link #acquire(long)} must have been called before this. * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #acquire(long)} was not called. * * @see RenderSession#insertChild(Object, ILayoutPullParser, int, IAnimationListener) */ public Result insertChild(final ViewGroup parentView, ILayoutPullParser childXml, final int index, IAnimationListener listener) { checkLock(); BridgeContext context = getContext(); // create a block parser for the XML BridgeXmlBlockParser blockParser = new BridgeXmlBlockParser( childXml, context, false /* platformResourceFlag */); // inflate the child without adding it to the root since we want to control where it'll // get added. We do pass the parentView however to ensure that the layoutParams will // be created correctly. final View child = mInflater.inflate(blockParser, parentView, false /*attachToRoot*/); blockParser.ensurePopped(); invalidateRenderingSize(); if (listener != null) { new AnimationThread(this, "insertChild", listener) { @Override public Result preAnimation() { parentView.setLayoutTransition(new LayoutTransition()); return addView(parentView, child, index); } @Override public void postAnimation() { parentView.setLayoutTransition(null); } }.start(); // always return success since the real status will come through the listener. return SUCCESS.createResult(child); } // add it to the parentView in the correct location Result result = addView(parentView, child, index); if (result.isSuccess() == false) { return result; } result = render(false /*freshRender*/); if (result.isSuccess()) { result = result.getCopyWithData(child); } return result; } /** * Adds a given view to a given parent at a given index. * * @param parent the parent to receive the view * @param view the view to add to the parent * @param index the index where to do the add. * * @return a Result with {@link Status#SUCCESS} or * {@link Status#ERROR_VIEWGROUP_NO_CHILDREN} if the given parent doesn't support * adding views. */ private Result addView(ViewGroup parent, View view, int index) { try { parent.addView(view, index); return SUCCESS.createResult(); } catch (UnsupportedOperationException e) { // looks like this is a view class that doesn't support children manipulation! return ERROR_VIEWGROUP_NO_CHILDREN.createResult(); } } /** * Moves a view to a new parent at a given location *

* {@link #acquire(long)} must have been called before this. * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #acquire(long)} was not called. * * @see RenderSession#moveChild(Object, Object, int, Map, IAnimationListener) */ public Result moveChild(final ViewGroup newParentView, final View childView, final int index, Map layoutParamsMap, final IAnimationListener listener) { checkLock(); invalidateRenderingSize(); LayoutParams layoutParams = null; if (layoutParamsMap != null) { // need to create a new LayoutParams object for the new parent. layoutParams = newParentView.generateLayoutParams( new BridgeLayoutParamsMapAttributes(layoutParamsMap)); } // get the current parent of the view that needs to be moved. final ViewGroup previousParent = (ViewGroup) childView.getParent(); if (listener != null) { final LayoutParams params = layoutParams; // there is no support for animating views across layouts, so in case the new and old // parent views are different we fake the animation through a no animation thread. if (previousParent != newParentView) { new Thread("not animated moveChild") { @Override public void run() { Result result = moveView(previousParent, newParentView, childView, index, params); if (result.isSuccess() == false) { listener.done(result); } // ready to do the work, acquire the scene. result = acquire(250); if (result.isSuccess() == false) { listener.done(result); return; } try { result = render(false /*freshRender*/); if (result.isSuccess()) { listener.onNewFrame(RenderSessionImpl.this.getSession()); } } finally { release(); } listener.done(result); } }.start(); } else { new AnimationThread(this, "moveChild", listener) { @Override public Result preAnimation() { // set up the transition for the parent. LayoutTransition transition = new LayoutTransition(); previousParent.setLayoutTransition(transition); // tweak the animation durations and start delays (to match the duration of // animation playing just before). // Note: Cannot user Animation.setDuration() directly. Have to set it // on the LayoutTransition. transition.setDuration(LayoutTransition.DISAPPEARING, 100); // CHANGE_DISAPPEARING plays after DISAPPEARING transition.setStartDelay(LayoutTransition.CHANGE_DISAPPEARING, 100); transition.setDuration(LayoutTransition.CHANGE_DISAPPEARING, 100); transition.setDuration(LayoutTransition.CHANGE_APPEARING, 100); // CHANGE_APPEARING plays after CHANGE_APPEARING transition.setStartDelay(LayoutTransition.APPEARING, 100); transition.setDuration(LayoutTransition.APPEARING, 100); return moveView(previousParent, newParentView, childView, index, params); } @Override public void postAnimation() { previousParent.setLayoutTransition(null); newParentView.setLayoutTransition(null); } }.start(); } // always return success since the real status will come through the listener. return SUCCESS.createResult(layoutParams); } Result result = moveView(previousParent, newParentView, childView, index, layoutParams); if (result.isSuccess() == false) { return result; } result = render(false /*freshRender*/); if (layoutParams != null && result.isSuccess()) { result = result.getCopyWithData(layoutParams); } return result; } /** * Moves a View from its current parent to a new given parent at a new given location, with * an optional new {@link LayoutParams} instance * * @param previousParent the previous parent, still owning the child at the time of the call. * @param newParent the new parent * @param movedView the view to move * @param index the new location in the new parent * @param params an option (can be null) {@link LayoutParams} instance. * * @return a Result with {@link Status#SUCCESS} or * {@link Status#ERROR_VIEWGROUP_NO_CHILDREN} if the given parent doesn't support * adding views. */ private Result moveView(ViewGroup previousParent, final ViewGroup newParent, final View movedView, final int index, final LayoutParams params) { try { // check if there is a transition on the previousParent. LayoutTransition previousTransition = previousParent.getLayoutTransition(); if (previousTransition != null) { // in this case there is an animation. This means we have to wait for the child's // parent reference to be null'ed out so that we can add it to the new parent. // It is technically removed right before the DISAPPEARING animation is done (if // the animation of this type is not null, otherwise it's after which is impossible // to handle). // Because there is no move animation, if the new parent is the same as the old // parent, we need to wait until the CHANGE_DISAPPEARING animation is done before // adding the child or the child will appear in its new location before the // other children have made room for it. // add a listener to the transition to be notified of the actual removal. previousTransition.addTransitionListener(new TransitionListener() { private int mChangeDisappearingCount = 0; public void startTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) { if (transitionType == LayoutTransition.CHANGE_DISAPPEARING) { mChangeDisappearingCount++; } } public void endTransition(LayoutTransition transition, ViewGroup container, View view, int transitionType) { if (transitionType == LayoutTransition.CHANGE_DISAPPEARING) { mChangeDisappearingCount--; } if (transitionType == LayoutTransition.CHANGE_DISAPPEARING && mChangeDisappearingCount == 0) { // add it to the parentView in the correct location if (params != null) { newParent.addView(movedView, index, params); } else { newParent.addView(movedView, index); } } } }); // remove the view from the current parent. previousParent.removeView(movedView); // and return since adding the view to the new parent is done in the listener. return SUCCESS.createResult(); } else { // standard code with no animation. pretty simple. previousParent.removeView(movedView); // add it to the parentView in the correct location if (params != null) { newParent.addView(movedView, index, params); } else { newParent.addView(movedView, index); } return SUCCESS.createResult(); } } catch (UnsupportedOperationException e) { // looks like this is a view class that doesn't support children manipulation! return ERROR_VIEWGROUP_NO_CHILDREN.createResult(); } } /** * Removes a child from its current parent. *

* {@link #acquire(long)} must have been called before this. * * @throws IllegalStateException if the current context is different than the one owned by * the scene, or if {@link #acquire(long)} was not called. * * @see RenderSession#removeChild(Object, IAnimationListener) */ public Result removeChild(final View childView, IAnimationListener listener) { checkLock(); invalidateRenderingSize(); final ViewGroup parent = (ViewGroup) childView.getParent(); if (listener != null) { new AnimationThread(this, "moveChild", listener) { @Override public Result preAnimation() { parent.setLayoutTransition(new LayoutTransition()); return removeView(parent, childView); } @Override public void postAnimation() { parent.setLayoutTransition(null); } }.start(); // always return success since the real status will come through the listener. return SUCCESS.createResult(); } Result result = removeView(parent, childView); if (result.isSuccess() == false) { return result; } return render(false /*freshRender*/); } /** * Removes a given view from its current parent. * * @param view the view to remove from its parent * * @return a Result with {@link Status#SUCCESS} or * {@link Status#ERROR_VIEWGROUP_NO_CHILDREN} if the given parent doesn't support * adding views. */ private Result removeView(ViewGroup parent, View view) { try { parent.removeView(view); return SUCCESS.createResult(); } catch (UnsupportedOperationException e) { // looks like this is a view class that doesn't support children manipulation! return ERROR_VIEWGROUP_NO_CHILDREN.createResult(); } } private void findBackground(RenderResources resources) { if (getParams().isBgColorOverridden() == false) { mWindowBackground = resources.findItemInTheme("windowBackground"); if (mWindowBackground != null) { mWindowBackground = resources.resolveResValue(mWindowBackground); } } } private boolean isTabletUi() { return getParams().getConfigScreenSize() == ScreenSize.XLARGE; } private void findStatusBar(RenderResources resources, DisplayMetrics metrics) { if (isTabletUi() == false) { boolean windowFullscreen = getBooleanThemeValue(resources, "windowFullscreen", false /*defaultValue*/); if (windowFullscreen == false && mWindowIsFloating == false) { // default value mStatusBarSize = DEFAULT_STATUS_BAR_HEIGHT; // get the real value ResourceValue value = resources.getFrameworkResource(ResourceType.DIMEN, "status_bar_height"); if (value != null) { TypedValue typedValue = ResourceHelper.getValue("status_bar_height", value.getValue(), true /*requireUnit*/); if (typedValue != null) { // compute the pixel value based on the display metrics mStatusBarSize = (int)typedValue.getDimension(metrics); } } } } } private void findActionBar(RenderResources resources, DisplayMetrics metrics) { if (mWindowIsFloating) { return; } boolean windowActionBar = getBooleanThemeValue(resources, "windowActionBar", true /*defaultValue*/); // if there's a value and it's false (default is true) if (windowActionBar) { // default size of the window title bar mActionBarSize = DEFAULT_TITLE_BAR_HEIGHT; // get value from the theme. ResourceValue value = resources.findItemInTheme("actionBarSize"); // resolve it value = resources.resolveResValue(value); if (value != null) { // get the numerical value, if available TypedValue typedValue = ResourceHelper.getValue("actionBarSize", value.getValue(), true /*requireUnit*/); if (typedValue != null) { // compute the pixel value based on the display metrics mActionBarSize = (int)typedValue.getDimension(metrics); } } } else { // action bar overrides title bar so only look for this one if action bar is hidden boolean windowNoTitle = getBooleanThemeValue(resources, "windowNoTitle", false /*defaultValue*/); if (windowNoTitle == false) { // default size of the window title bar mTitleBarSize = DEFAULT_TITLE_BAR_HEIGHT; // get value from the theme. ResourceValue value = resources.findItemInTheme("windowTitleSize"); // resolve it value = resources.resolveResValue(value); if (value != null) { // get the numerical value, if available TypedValue typedValue = ResourceHelper.getValue("windowTitleSize", value.getValue(), true /*requireUnit*/); if (typedValue != null) { // compute the pixel value based on the display metrics mTitleBarSize = (int)typedValue.getDimension(metrics); } } } } } private void findSystemBar(RenderResources resources, DisplayMetrics metrics) { if (isTabletUi() && mWindowIsFloating == false) { // default value mSystemBarSize = 48; // ?? // get the real value ResourceValue value = resources.getFrameworkResource(ResourceType.DIMEN, "status_bar_height"); if (value != null) { TypedValue typedValue = ResourceHelper.getValue("status_bar_height", value.getValue(), true /*requireUnit*/); if (typedValue != null) { // compute the pixel value based on the display metrics mSystemBarSize = (int)typedValue.getDimension(metrics); } } } } private boolean getBooleanThemeValue(RenderResources resources, String name, boolean defaultValue) { // get the title bar flag from the current theme. ResourceValue value = resources.findItemInTheme(name); // because it may reference something else, we resolve it. value = resources.resolveResValue(value); // if there's no value, return the default. if (value == null || value.getValue() == null) { return defaultValue; } return XmlUtils.convertValueToBoolean(value.getValue(), defaultValue); } /** * Post process on a view hierachy that was just inflated. *

At the moment this only support TabHost: If {@link TabHost} is detected, look for the * {@link TabWidget}, and the corresponding {@link FrameLayout} and make new tabs automatically * based on the content of the {@link FrameLayout}. * @param view the root view to process. * @param projectCallback callback to the project. */ private void postInflateProcess(View view, IProjectCallback projectCallback) throws PostInflateException { if (view instanceof TabHost) { setupTabHost((TabHost)view, projectCallback); } else if (view instanceof QuickContactBadge) { QuickContactBadge badge = (QuickContactBadge) view; badge.setImageToDefault(); } else if (view instanceof AdapterView) { // get the view ID. int id = view.getId(); BridgeContext context = getContext(); // get a ResourceReference from the integer ID. ResourceReference listRef = context.resolveId(id); if (listRef != null) { SessionParams params = getParams(); AdapterBinding binding = params.getAdapterBindings().get(listRef); // if there was no adapter binding, trying to get it from the call back. if (binding == null) { binding = params.getProjectCallback().getAdapterBinding(listRef, context.getViewKey(view), view); } if (binding != null) { if (view instanceof AbsListView) { if ((binding.getFooterCount() > 0 || binding.getHeaderCount() > 0) && view instanceof ListView) { ListView list = (ListView) view; boolean skipCallbackParser = false; int count = binding.getHeaderCount(); for (int i = 0 ; i < count ; i++) { Pair pair = context.inflateView( binding.getHeaderAt(i), list, false /*attachToRoot*/, skipCallbackParser); if (pair.getFirst() != null) { list.addHeaderView(pair.getFirst()); } skipCallbackParser |= pair.getSecond(); } count = binding.getFooterCount(); for (int i = 0 ; i < count ; i++) { Pair pair = context.inflateView( binding.getFooterAt(i), list, false /*attachToRoot*/, skipCallbackParser); if (pair.getFirst() != null) { list.addFooterView(pair.getFirst()); } skipCallbackParser |= pair.getSecond(); } } if (view instanceof ExpandableListView) { ((ExpandableListView) view).setAdapter( new FakeExpandableAdapter( listRef, binding, params.getProjectCallback())); } else { ((AbsListView) view).setAdapter( new FakeAdapter( listRef, binding, params.getProjectCallback())); } } else if (view instanceof AbsSpinner) { ((AbsSpinner) view).setAdapter( new FakeAdapter( listRef, binding, params.getProjectCallback())); } } } } else if (view instanceof ViewGroup) { ViewGroup group = (ViewGroup)view; final int count = group.getChildCount(); for (int c = 0 ; c < count ; c++) { View child = group.getChildAt(c); postInflateProcess(child, projectCallback); } } } /** * Sets up a {@link TabHost} object. * @param tabHost the TabHost to setup. * @param projectCallback The project callback object to access the project R class. * @throws PostInflateException */ private void setupTabHost(TabHost tabHost, IProjectCallback projectCallback) throws PostInflateException { // look for the TabWidget, and the FrameLayout. They have their own specific names View v = tabHost.findViewById(android.R.id.tabs); if (v == null) { throw new PostInflateException( "TabHost requires a TabWidget with id \"android:id/tabs\".\n"); } if ((v instanceof TabWidget) == false) { throw new PostInflateException(String.format( "TabHost requires a TabWidget with id \"android:id/tabs\".\n" + "View found with id 'tabs' is '%s'", v.getClass().getCanonicalName())); } v = tabHost.findViewById(android.R.id.tabcontent); if (v == null) { // TODO: see if we can fake tabs even without the FrameLayout (same below when the framelayout is empty) throw new PostInflateException( "TabHost requires a FrameLayout with id \"android:id/tabcontent\"."); } if ((v instanceof FrameLayout) == false) { throw new PostInflateException(String.format( "TabHost requires a FrameLayout with id \"android:id/tabcontent\".\n" + "View found with id 'tabcontent' is '%s'", v.getClass().getCanonicalName())); } FrameLayout content = (FrameLayout)v; // now process the content of the framelayout and dynamically create tabs for it. final int count = content.getChildCount(); // this must be called before addTab() so that the TabHost searches its TabWidget // and FrameLayout. tabHost.setup(); if (count == 0) { // Create a dummy child to get a single tab TabSpec spec = tabHost.newTabSpec("tag").setIndicator("Tab Label", tabHost.getResources().getDrawable(android.R.drawable.ic_menu_info_details)) .setContent(new TabHost.TabContentFactory() { public View createTabContent(String tag) { return new LinearLayout(getContext()); } }); tabHost.addTab(spec); return; } else { // for each child of the framelayout, add a new TabSpec for (int i = 0 ; i < count ; i++) { View child = content.getChildAt(i); String tabSpec = String.format("tab_spec%d", i+1); int id = child.getId(); Pair resource = projectCallback.resolveResourceId(id); String name; if (resource != null) { name = resource.getSecond(); } else { name = String.format("Tab %d", i+1); // default name if id is unresolved. } tabHost.addTab(tabHost.newTabSpec(tabSpec).setIndicator(name).setContent(id)); } } } private List startVisitingViews(View view, int offset, boolean setExtendedInfo) { if (view == null) { return null; } // adjust the offset to this view. offset += view.getTop(); if (view == mContentRoot) { return visitAllChildren(mContentRoot, offset, setExtendedInfo); } // otherwise, look for mContentRoot in the children if (view instanceof ViewGroup) { ViewGroup group = ((ViewGroup) view); for (int i = 0; i < group.getChildCount(); i++) { List list = startVisitingViews(group.getChildAt(i), offset, setExtendedInfo); if (list != null) { return list; } } } return null; } /** * Visits a View and its children and generate a {@link ViewInfo} containing the * bounds of all the views. * @param view the root View * @param offset an offset for the view bounds. * @param setExtendedInfo whether to set the extended view info in the {@link ViewInfo} object. */ private ViewInfo visit(View view, int offset, boolean setExtendedInfo) { if (view == null) { return null; } ViewInfo result = new ViewInfo(view.getClass().getName(), getContext().getViewKey(view), view.getLeft(), view.getTop() + offset, view.getRight(), view.getBottom() + offset, view, view.getLayoutParams()); if (setExtendedInfo) { MarginLayoutParams marginParams = null; LayoutParams params = view.getLayoutParams(); if (params instanceof MarginLayoutParams) { marginParams = (MarginLayoutParams) params; } result.setExtendedInfo(view.getBaseline(), marginParams != null ? marginParams.leftMargin : 0, marginParams != null ? marginParams.topMargin : 0, marginParams != null ? marginParams.rightMargin : 0, marginParams != null ? marginParams.bottomMargin : 0); } if (view instanceof ViewGroup) { ViewGroup group = ((ViewGroup) view); result.setChildren(visitAllChildren(group, 0 /*offset*/, setExtendedInfo)); } return result; } /** * Visits all the children of a given ViewGroup generate a list of {@link ViewInfo} * containing the bounds of all the views. * @param view the root View * @param offset an offset for the view bounds. * @param setExtendedInfo whether to set the extended view info in the {@link ViewInfo} object. */ private List visitAllChildren(ViewGroup viewGroup, int offset, boolean setExtendedInfo) { if (viewGroup == null) { return null; } List children = new ArrayList(); for (int i = 0; i < viewGroup.getChildCount(); i++) { children.add(visit(viewGroup.getChildAt(i), offset, setExtendedInfo)); } return children; } private void invalidateRenderingSize() { mMeasuredScreenWidth = mMeasuredScreenHeight = -1; } public BufferedImage getImage() { return mImage; } public boolean isAlphaChannelImage() { return mIsAlphaChannelImage; } public List getViewInfos() { return mViewInfoList; } public Map getDefaultProperties(Object viewObject) { return getContext().getDefaultPropMap(viewObject); } public void setScene(RenderSession session) { mScene = session; } public RenderSession getSession() { return mScene; } }