--- /dev/null
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+ android:orientation="vertical"
+ android:layout_width="fill_parent"
+ android:layout_height="wrap_content"
+ android:id="@+id/parent"
+ >
+ <LinearLayout
+ android:orientation="horizontal"
+ android:layout_width="fill_parent"
+ android:layout_height="fill_parent"
+ >
+ <Button
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:text="Show Buttons"
+ android:id="@+id/addNewButton"
+ />
+ <CheckBox
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:text="Custom Animations"
+ android:id="@+id/customAnimCB"
+ />
+ <CheckBox
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:text="Hide (GONE)"
+ android:id="@+id/hideGoneCB"
+ />
+ </LinearLayout>
+</LinearLayout>
--- /dev/null
+/*
+ * 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.example.android.apis.animation;
+
+// Need the following import to get access to the app resources, since this
+// class is in a sub-package.
+import android.animation.Animator;
+import android.animation.ObjectAnimator;
+import android.widget.LinearLayout;
+import com.example.android.apis.R;
+
+import android.animation.AnimatorListenerAdapter;
+import android.animation.Keyframe;
+import android.animation.LayoutTransition;
+import android.animation.PropertyValuesHolder;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.widget.Button;
+
+/**
+ * This application demonstrates how to use LayoutTransition to automate transition animations
+ * as items are hidden or shown in a container.
+ */
+public class LayoutAnimationsHideShow extends Activity {
+
+ private int numButtons = 1;
+ ViewGroup container = null;
+
+ /** Called when the activity is first created. */
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.layout_animations_hideshow);
+
+ final CheckBox hideGoneCB = (CheckBox) findViewById(R.id.hideGoneCB);
+
+ container = new FixedGridLayout(this);
+ ((FixedGridLayout)container).setCellHeight(50);
+ ((FixedGridLayout)container).setCellWidth(100);
+ container = new LinearLayout(this);
+
+ // Add a slew of buttons to the container. We won't add any more buttons at runtime, but
+ // will just show/hide the buttons we've already created
+ for (int i = 0; i < 6; ++i) {
+ Button newButton = new Button(this);
+ newButton.setText("Click to Hide " + i);
+ container.addView(newButton);
+ newButton.setOnClickListener(new View.OnClickListener() {
+ public void onClick(View v) {
+ v.setVisibility(hideGoneCB.isChecked() ? View.GONE : View.INVISIBLE);
+ }
+ });
+ }
+ final LayoutTransition transitioner = new LayoutTransition();
+ container.setLayoutTransition(transitioner);
+
+ ViewGroup parent = (ViewGroup) findViewById(R.id.parent);
+ parent.addView(container);
+
+ Button addButton = (Button) findViewById(R.id.addNewButton);
+ addButton.setOnClickListener(new View.OnClickListener() {
+ public void onClick(View v) {
+ for (int i = 0; i < container.getChildCount(); ++i) {
+ View view = (View) container.getChildAt(i);
+ view.setVisibility(View.VISIBLE);
+ }
+ }
+ });
+
+ CheckBox customAnimCB = (CheckBox) findViewById(R.id.customAnimCB);
+ customAnimCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+ public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+ long duration;
+ if (isChecked) {
+ transitioner.setStagger(LayoutTransition.CHANGE_APPEARING, 30);
+ transitioner.setStagger(LayoutTransition.CHANGE_DISAPPEARING, 30);
+ setupAnimations(transitioner);
+ duration = 500;
+ } else {
+ transitioner.setStagger(LayoutTransition.CHANGE_APPEARING, 0);
+ transitioner.setStagger(LayoutTransition.CHANGE_DISAPPEARING, 0);
+ transitioner.setAnimator(LayoutTransition.APPEARING, null);
+ transitioner.setAnimator(LayoutTransition.DISAPPEARING, null);
+ transitioner.setAnimator(LayoutTransition.CHANGE_APPEARING, null);
+ transitioner.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, null);
+ duration = 300;
+ }
+ transitioner.setDuration(duration);
+ }
+ });
+ }
+
+ private void setupAnimations(LayoutTransition transition) {
+ // Changing while Adding
+ PropertyValuesHolder<Integer> pvhLeft =
+ new PropertyValuesHolder<Integer>("left", 0, 1);
+ PropertyValuesHolder<Integer> pvhTop =
+ new PropertyValuesHolder<Integer>("top", 0, 1);
+ PropertyValuesHolder<Integer> pvhRight =
+ new PropertyValuesHolder<Integer>("right", 0, 1);
+ PropertyValuesHolder<Integer> pvhBottom =
+ new PropertyValuesHolder<Integer>("bottom", 0, 1);
+ PropertyValuesHolder<Float> pvhScaleX =
+ new PropertyValuesHolder<Float>("scaleX", 1f, 0f, 1f);
+ PropertyValuesHolder<Float> pvhScaleY =
+ new PropertyValuesHolder<Float>("scaleY", 1f, 0f, 1f);
+ final ObjectAnimator changeIn =
+ new ObjectAnimator(transition.getDuration(LayoutTransition.CHANGE_APPEARING),
+ this, pvhLeft, pvhTop, pvhRight, pvhBottom, pvhScaleX, pvhScaleY);
+ transition.setAnimator(LayoutTransition.CHANGE_APPEARING, changeIn);
+ changeIn.addListener(new AnimatorListenerAdapter() {
+ public void onAnimationEnd(Animator anim) {
+ View view = (View) ((ObjectAnimator) anim).getTarget();
+ view.setScaleX(1f);
+ view.setScaleY(1f);
+ }
+ });
+
+ // Changing while Removing
+ Keyframe kf0 = new Keyframe(0f, 0f);
+ Keyframe kf1 = new Keyframe(.9999f, 360f);
+ Keyframe kf2 = new Keyframe(1f, 0f);
+ PropertyValuesHolder<Keyframe> pvhRotation =
+ new PropertyValuesHolder<Keyframe>("rotation", kf0, kf1, kf2);
+ final ObjectAnimator changeOut =
+ new ObjectAnimator(transition.getDuration(LayoutTransition.CHANGE_DISAPPEARING),
+ this, pvhLeft, pvhTop, pvhRight, pvhBottom, pvhRotation);
+ transition.setAnimator(LayoutTransition.CHANGE_DISAPPEARING, changeOut);
+ changeOut.addListener(new AnimatorListenerAdapter() {
+ public void onAnimationEnd(Animator anim) {
+ View view = (View) ((ObjectAnimator) anim).getTarget();
+ view.setRotation(0f);
+ }
+ });
+
+ // Adding
+ ObjectAnimator<Float> animIn =
+ new ObjectAnimator<Float>(transition.getDuration(LayoutTransition.APPEARING),
+ null, "rotationY", 90f, 0f);
+ transition.setAnimator(LayoutTransition.APPEARING, animIn);
+ animIn.addListener(new AnimatorListenerAdapter() {
+ public void onAnimationEnd(Animator anim) {
+ View view = (View) ((ObjectAnimator) anim).getTarget();
+ view.setRotationY(0f);
+ }
+ });
+
+ // Removing
+ ObjectAnimator<Float> animOut =
+ new ObjectAnimator<Float>(transition.getDuration(LayoutTransition.DISAPPEARING),
+ null, "rotationX", 0f, 90f);
+ transition.setAnimator(LayoutTransition.DISAPPEARING, animOut);
+ animIn.addListener(new AnimatorListenerAdapter() {
+ public void onAnimationEnd(Animator anim) {
+ View view = (View) ((ObjectAnimator) anim).getTarget();
+ view.setRotationX(0f);
+ }
+ });
+
+ }
+}
\ No newline at end of file
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