Adds BasicMultitouch sample.

Change-Id: Ib3436f7fff8d3677458008793feb37dfa5e168db
android · Jul 30, 2019 · a1a60cc · a1a60cc
1 parent 4d82755
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diff --git a/BasicMultitouch/.google/packaging.yaml b/BasicMultitouch/.google/packaging.yaml
@@ -0,0 +1,17 @@
+
+# GOOGLE SAMPLE PACKAGING DATA
+#
+# This file is used by Google as part of our samples packaging process.
+# End users may safely ignore this file. It has no relevance to other systems.
+---
+status: PUBLISHED
+technologies: [Android]
+categories: [UI, Views, Input]
+languages: [Java]
+solutions: [Mobile]
+github: android/input
+level: INTERMEDIATE
+icon: screenshots/icon-web.png
+apiRefs:
+ - android:android.view.MotionEvent
+license: apache2
diff --git a/BasicMultitouch/Application/build.gradle b/BasicMultitouch/Application/build.gradle
@@ -0,0 +1,68 @@
+
+buildscript {
+ repositories {
+ google()
+ jcenter()
+ }
+
+ dependencies {
+ classpath 'com.android.tools.build:gradle:3.4.2'
+ }
+}
+
+apply plugin: 'com.android.application'
+
+repositories {
+ google()
+ jcenter()
+}
+
+dependencies {
+
+
+ implementation "com.android.support:support-v4:28.0.0"
+ implementation "com.android.support:support-v13:28.0.0"
+ implementation "com.android.support:cardview-v7:28.0.0"
+ implementation "com.android.support:appcompat-v7:28.0.0"
+
+
+
+
+
+
+}
+
+// The sample build uses multiple directories to
+// keep boilerplate and common code separate from
+// the main sample code.
+List<String> dirs = [
+ 'main', // main sample code; look here for the interesting stuff.
+ 'common', // components that are reused by multiple samples
+ 'template'] // boilerplate code that is generated by the sample template process
+
+android {
+ compileSdkVersion 28
+
+ defaultConfig {
+ minSdkVersion 14
+ targetSdkVersion 28
+ }
+
+ compileOptions {
+ sourceCompatibility JavaVersion.VERSION_1_7
+ targetCompatibility JavaVersion.VERSION_1_7
+ }
+
+ sourceSets {
+ main {
+ dirs.each { dir ->
+ java.srcDirs "src/${dir}/java"
+ res.srcDirs "src/${dir}/res"
+ }
+ }
+ androidTest.setRoot('tests')
+ androidTest.java.srcDirs = ['tests/src']
+
+ }
+
+}
diff --git a/BasicMultitouch/Application/src/main/AndroidManifest.xml b/BasicMultitouch/Application/src/main/AndroidManifest.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2013 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+ package="com.example.android.basicmultitouch"
+ android:versionCode="1"
+ android:versionName="1.0" >
+
+ <!-- Min/target SDK versions (<uses-sdk>) managed by build.gradle -->
+
+ <application
+ android:allowBackup="true"
+ android:icon="@drawable/ic_launcher"
+ android:label="@string/app_name"
+ android:theme="@style/AppTheme" >
+ <activity
+ android:name=".MainActivity"
+ android:label="@string/app_name" >
+ <intent-filter>
+ <action android:name="android.intent.action.MAIN" />
+
+ <category android:name="android.intent.category.LAUNCHER" />
+ </intent-filter>
+ </activity>
+ </application>
+
+</manifest>
diff --git a/...ultitouch/Application/src/main/java/com/example/android/basicmultitouch/MainActivity.java b/...ultitouch/Application/src/main/java/com/example/android/basicmultitouch/MainActivity.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2013 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.basicmultitouch;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+/**
+ * This is an example of keeping track of individual touches across multiple
+ * {@link android.view.MotionEvent}s.
+ * <p>
+ * This is illustrated by a View ({@link TouchDisplayView}) that responds to
+ * touch events and draws coloured circles for each pointer, stores the last
+ * positions of this pointer and draws them. This example shows the relationship
+ * between MotionEvent indices, pointer identifiers and actions.
+ *
+ * @see android.view.MotionEvent
+ */
+public class MainActivity extends Activity {
+ TouchDisplayView mView;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ setContentView(R.layout.layout_mainactivity);
+ }
+
+}
diff --git a/BasicMultitouch/Application/src/main/java/com/example/android/basicmultitouch/Pools.java b/BasicMultitouch/Application/src/main/java/com/example/android/basicmultitouch/Pools.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2009 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.basicmultitouch;
+
+/**
+ * Helper class for crating pools of objects. An example use looks like this:
+ * <pre>
+ * public class MyPooledClass {
+ *
+ * private static final SynchronizedPool<MyPooledClass> sPool =
+ * new SynchronizedPool<MyPooledClass>(10);
+ *
+ * public static MyPooledClass obtain() {
+ * MyPooledClass instance = sPool.acquire();
+ * return (instance != null) ? instance : new MyPooledClass();
+ * }
+ *
+ * public void recycle() {
+ * // Clear state if needed.
+ * sPool.release(this);
+ * }
+ *
+ * . . .
+ * }
+ * </pre>
+ *
+ * @hide
+ */
+public final class Pools {
+
+ /**
+ * Interface for managing a pool of objects.
+ *
+ * @param <T> The pooled type.
+ */
+ public static interface Pool<T> {
+
+ /**
+ * @return An instance from the pool if such, null otherwise.
+ */
+ public T acquire();
+
+ /**
+ * Release an instance to the pool.
+ *
+ * @param instance The instance to release.
+ * @return Whether the instance was put in the pool.
+ *
+ * @throws IllegalStateException If the instance is already in the pool.
+ */
+ public boolean release(T instance);
+ }
+
+ private Pools() {
+ /* do nothing - hiding constructor */
+ }
+
+ /**
+ * Simple (non-synchronized) pool of objects.
+ *
+ * @param <T> The pooled type.
+ */
+ public static class SimplePool<T> implements Pool<T> {
+ private final Object[] mPool;
+
+ private int mPoolSize;
+
+ /**
+ * Creates a new instance.
+ *
+ * @param maxPoolSize The max pool size.
+ *
+ * @throws IllegalArgumentException If the max pool size is less than zero.
+ */
+ public SimplePool(int maxPoolSize) {
+ if (maxPoolSize <= 0) {
+ throw new IllegalArgumentException("The max pool size must be > 0");
+ }
+ mPool = new Object[maxPoolSize];
+ }
+
+ @Override
+ @SuppressWarnings("unchecked")
+ public T acquire() {
+ if (mPoolSize > 0) {
+ final int lastPooledIndex = mPoolSize - 1;
+ T instance = (T) mPool[lastPooledIndex];
+ mPool[lastPooledIndex] = null;
+ mPoolSize--;
+ return instance;
+ }
+ return null;
+ }
+
+ @Override
+ public boolean release(T instance) {
+ if (isInPool(instance)) {
+ throw new IllegalStateException("Already in the pool!");
+ }
+ if (mPoolSize < mPool.length) {
+ mPool[mPoolSize] = instance;
+ mPoolSize++;
+ return true;
+ }
+ return false;
+ }
+
+ private boolean isInPool(T instance) {
+ for (int i = 0; i < mPoolSize; i++) {
+ if (mPool[i] == instance) {
+ return true;
+ }
+ }
+ return false;
+ }
+ }
+
+ /**
+ * Synchronized) pool of objects.
+ *
+ * @param <T> The pooled type.
+ */
+ public static class SynchronizedPool<T> extends SimplePool<T> {
+ private final Object mLock = new Object();
+
+ /**
+ * Creates a new instance.
+ *
+ * @param maxPoolSize The max pool size.
+ *
+ * @throws IllegalArgumentException If the max pool size is less than zero.
+ */
+ public SynchronizedPool(int maxPoolSize) {
+ super(maxPoolSize);
+ }
+
+ @Override
+ public T acquire() {
+ synchronized (mLock) {
+ return super.acquire();
+ }
+ }
+
+ @Override
+ public boolean release(T element) {
+ synchronized (mLock) {
+ return super.release(element);
+ }
+ }
+ }
+}