1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.view; 17 18 import com.android.ide.common.rendering.api.LayoutLog; 19 import com.android.layoutlib.bridge.Bridge; 20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 21 22 import java.lang.reflect.Field; 23 import java.util.concurrent.atomic.AtomicReference; 24 25 /** 26 * Delegate used to provide new implementation of a select few methods of {@link Choreographer} 27 * 28 * Through the layoutlib_create tool, the original methods of Choreographer have been 29 * replaced by calls to methods of the same name in this delegate class. 30 * 31 */ 32 public class Choreographer_Delegate { 33 static final AtomicReference<Choreographer> mInstance = new AtomicReference<Choreographer>(); 34 35 @LayoutlibDelegate 36 public static Choreographer getInstance() { 37 if (mInstance.get() == null) { 38 mInstance.compareAndSet(null, Choreographer.getInstance_Original()); 39 } 40 41 return mInstance.get(); 42 } 43 44 @LayoutlibDelegate 45 public static float getRefreshRate() { 46 return 60.f; 47 } 48 49 @LayoutlibDelegate 50 static void scheduleVsyncLocked(Choreographer thisChoreographer) { 51 // do nothing 52 } 53 54 public static void doFrame(long frameTimeNanos) { 55 Choreographer thisChoreographer = Choreographer.getInstance(); 56 57 thisChoreographer.mLastFrameTimeNanos = frameTimeNanos; 58 59 thisChoreographer.mFrameInfo.markInputHandlingStart(); 60 thisChoreographer.doCallbacks(Choreographer.CALLBACK_INPUT, frameTimeNanos); 61 62 thisChoreographer.mFrameInfo.markAnimationsStart(); 63 thisChoreographer.doCallbacks(Choreographer.CALLBACK_ANIMATION, frameTimeNanos); 64 65 thisChoreographer.mFrameInfo.markPerformTraversalsStart(); 66 thisChoreographer.doCallbacks(Choreographer.CALLBACK_TRAVERSAL, frameTimeNanos); 67 68 thisChoreographer.doCallbacks(Choreographer.CALLBACK_COMMIT, frameTimeNanos); 69 } 70 71 public static void dispose() { 72 try { 73 Field threadInstanceField = Choreographer.class.getDeclaredField("sThreadInstance"); 74 threadInstanceField.setAccessible(true); 75 @SuppressWarnings("unchecked") ThreadLocal<Choreographer> threadInstance = 76 (ThreadLocal<Choreographer>) threadInstanceField.get(null); 77 threadInstance.remove(); 78 } catch (ReflectiveOperationException e) { 79 assert false; 80 Bridge.getLog().error(LayoutLog.TAG_BROKEN, 81 "Unable to clear Choreographer memory.", e, null); 82 } 83 } 84 } 85