在哪里可以找到Android“Fingerpaint"演示?(Android Studio时代) [英] WHERE to find Android "Fingerpaint" demo? (Android Studio era)

查看:40
本文介绍了在哪里可以找到Android“Fingerpaint"演示?(Android Studio时代)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

许多 Android 讨论都集中在(显然是著名的)Fingerpaint 示例上:

上的出色讨论

整个文件Fingerpaint.java:(据我所知,这是整个样本:)

这来自 SDK11、17 或 19:

我仔细检查过,文件在 11、17、19 中是相同的.希望它可以帮助某人.

/** 版权所有 (C) 2007 安卓开源项目** 根据 Apache 许可,版本 2.0(许可")获得许可;* 除非遵守许可,否则您不得使用此文件.* 您可以在以下网址获得许可证副本** http://www.apache.org/licenses/LICENSE-2.0** 除非适用法律要求或书面同意,否则软件* 根据许可证分发是按原样"分发的;基础,* 没有任何形式的明示或暗示的保证或条件.* 请参阅许可证以了解管理权限的特定语言和* 许可下的限制.*/包 com.example.android.apis.graphics;导入 android.content.Context;导入 android.graphics.*;导入 android.os.Bundle;导入 android.view.Menu;导入 android.view.MenuItem;导入 android.view.MotionEvent;导入 android.view.View;公共类 FingerPaint 扩展了 GraphicsActivity实现 ColorPickerDialog.OnColorChangedListener {@覆盖protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(new MyView(this));mPaint = new Paint();mPaint.setAntiAlias(true);mPaint.setDither(true);mPaint.setColor(0xFFFF0000);mPaint.setStyle(Paint.Style.STROKE);mPaint.setStrokeJoin(Paint.Join.ROUND);mPaint.setStrokeCap(Paint.Cap.ROUND);mPaint.setStrokeWidth(12);mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },0.4f、6、3.5f);mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);}私人油漆 mPaint;私人面具过滤器 mEmboss;私人面具过滤器 mBlur;public void colorChanged(int color) {mPaint.setColor(颜色);}公共类 MyView 扩展视图 {私有静态最终浮动 MINP = 0.25f;私有静态最终浮动 MAXP = 0.75f;私有位图 mBitmap;私人画布 mCanvas;私有路径 mPath;私有油漆 mBitmapPaint;公共 MyView(上下文 c){超级(c);mPath = 新路径();mBitmapPaint = new Paint(Paint.DITHER_FLAG);}@覆盖protected void onSizeChanged(int w, int h, int oldw, int oldh) {super.onSizeChanged(w, h, oldw, oldh);mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);mCanvas = new Canvas(mBitmap);}@覆盖受保护的无效 onDraw(画布画布){canvas.drawColor(0xFFAAAAAA);canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);canvas.drawPath(mPath, mPaint);}私人浮动 mX, my;私有静态最终浮动 TOUCH_TOLERANCE = 4;私人无效touch_start(浮动x,浮动y){mPath.reset();mPath.moveTo(x, y);mX = x;米 = y;}私人无效touch_move(浮动x,浮动y){float dx = Math.abs(x - mX);float dy = Math.abs(y - my);if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);mX = x;米 = y;}}私人无效touch_up(){mPath.lineTo(mX, my);//提交到我们屏幕外的路径mCanvas.drawPath(mPath, mPaint);//杀死它,这样我们就不会重复绘制mPath.reset();}@覆盖公共布尔 onTouchEvent(MotionEvent 事件){浮动 x = event.getX();浮动 y = event.getY();开关(事件.getAction()){案例 MotionEvent.ACTION_DOWN:触摸开始(x,y);无效();休息;案例 MotionEvent.ACTION_MOVE:触摸移动(x,y);无效();休息;案例 MotionEvent.ACTION_UP:润色();无效();休息;}返回真;}}private static final int COLOR_MENU_ID = Menu.FIRST;private static final int EMBOSS_MENU_ID = Menu.FIRST + 1;private static final int BLUR_MENU_ID = Menu.FIRST + 2;private static final int ERASE_MENU_ID = Menu.FIRST + 3;private static final int SRCATOP_MENU_ID = Menu.FIRST + 4;@覆盖公共布尔 onCreateOptionsMenu(菜单菜单){super.onCreateOptionsMenu(menu);menu.add(0, COLOR_MENU_ID, 0, 颜色").setShortcut('3', 'c');menu.add(0, EMBOSS_MENU_ID, 0, "Emboss").setShortcut('4', 's');menu.add(0, BLUR_MENU_ID, 0, "Blur").setShortcut('5', 'z');menu.add(0, ERASE_MENU_ID, 0, "Erase").setShortcut('5', 'z');menu.add(0, SRCATOP_MENU_ID, 0, "SrcATop").setShortcut('5', 'z');/**** 这是用滤镜效果扩展的机制吗?Intent intent = new Intent(null, getIntent().getData());intent.addCategory(Intent.CATEGORY_ALTERNATIVE);menu.addIntentOptions(Menu.ALTERNATIVE, 0,新的组件名称(这个,NotesList.class),空,意图,0,空);*****/返回真;}@覆盖公共布尔 onPrepareOptionsMenu(菜单菜单){super.onPrepareOptionsMenu(menu);返回真;}@覆盖公共布尔 onOptionsItemSelected(MenuItem item) {mPaint.setXfermode(null);mPaint.setAlpha(0xFF);开关(item.getItemId()){案例 COLOR_MENU_ID:new ColorPickerDialog(this, this, mPaint.getColor()).show();返回真;案例 EMBOSS_MENU_ID:如果(mPaint.getMaskFilter()!= mEmboss){mPaint.setMaskFilter(mEmboss);} 别的 {mPaint.setMaskFilter(null);}返回真;案例 BLUR_MENU_ID:如果(mPaint.getMaskFilter()!= mBlur){mPaint.setMaskFilter(mBlur);} 别的 {mPaint.setMaskFilter(null);}返回真;案例ERASE_MENU_ID:mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));返回真;案例 SRCATOP_MENU_ID:mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));mPaint.setAlpha(0x80);返回真;}返回 super.onOptionsItemSelected(item);}}

Many, many Android discussions focus on the (apparently, famous) Fingerpaint sample:

https://stackoverflow.com/a/16650524/294884

Where do I get it, to use with Android Studio? .. 2014

http://developer.android.com/samples/index.html

Or is it now just completely out of date and legacy? Thanks for any info

Android Studio: it has NO folders, samples/ or the like............

There's a possibility the beloved SDK Manager, on Mac - Studio, could help?

Would I have to go with the API11 folder?

The Android page does not seem to show Fingerpaint: here's what I see

Looking in each category, there is no Fingerpaint....

On a Mac, I did manage to download API11 Samples using the beloved ADKManager. Incerdibly, on Mac they are deeply hidden inside a package (screw Macs!) But that "sample" is not there...sad

解决方案

I found it! Thanks to Golem and Raghunandan

It is incredibly hard to find it on a Mac. Use SDKManager to download API11Samples.

Next you have to on a Mac "package contents" the Studio app itself,

and drill way down. try "ApiDemos"

I simply don't know if this is the latest version of the file.

Here is the whole file...

for any Mac users, to save you time:

As far as I know this is the latest version. Please also see the outstanding discussion at https://stackoverflow.com/a/16650524/294884

the entire file Fingerpaint.java: (as far as I know that is the whole sample:)

THIS IS FROM SDK11, 17 or 19:

I CAREFULLY CHECKED AND THE FILE IS IDENTICAL in 11,17,19. Hope it helps someone.

/*
 * Copyright (C) 2007 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.graphics;

import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;

public class FingerPaint extends GraphicsActivity
        implements ColorPickerDialog.OnColorChangedListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new MyView(this));

        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
        mPaint.setColor(0xFFFF0000);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeJoin(Paint.Join.ROUND);
        mPaint.setStrokeCap(Paint.Cap.ROUND);
        mPaint.setStrokeWidth(12);

        mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 },
                                       0.4f, 6, 3.5f);

        mBlur = new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL);
    }

    private Paint       mPaint;
    private MaskFilter  mEmboss;
    private MaskFilter  mBlur;

    public void colorChanged(int color) {
        mPaint.setColor(color);
    }

    public class MyView extends View {

        private static final float MINP = 0.25f;
        private static final float MAXP = 0.75f;

        private Bitmap  mBitmap;
        private Canvas  mCanvas;
        private Path    mPath;
        private Paint   mBitmapPaint;

        public MyView(Context c) {
            super(c);

            mPath = new Path();
            mBitmapPaint = new Paint(Paint.DITHER_FLAG);
        }

        @Override
        protected void onSizeChanged(int w, int h, int oldw, int oldh) {
            super.onSizeChanged(w, h, oldw, oldh);
            mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
            mCanvas = new Canvas(mBitmap);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            canvas.drawColor(0xFFAAAAAA);

            canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);

            canvas.drawPath(mPath, mPaint);
        }

        private float mX, mY;
        private static final float TOUCH_TOLERANCE = 4;

        private void touch_start(float x, float y) {
            mPath.reset();
            mPath.moveTo(x, y);
            mX = x;
            mY = y;
        }
        private void touch_move(float x, float y) {
            float dx = Math.abs(x - mX);
            float dy = Math.abs(y - mY);
            if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
                mPath.quadTo(mX, mY, (x + mX)/2, (y + mY)/2);
                mX = x;
                mY = y;
            }
        }
        private void touch_up() {
            mPath.lineTo(mX, mY);
            // commit the path to our offscreen
            mCanvas.drawPath(mPath, mPaint);
            // kill this so we don't double draw
            mPath.reset();
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            float x = event.getX();
            float y = event.getY();

            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    touch_start(x, y);
                    invalidate();
                    break;
                case MotionEvent.ACTION_MOVE:
                    touch_move(x, y);
                    invalidate();
                    break;
                case MotionEvent.ACTION_UP:
                    touch_up();
                    invalidate();
                    break;
            }
            return true;
        }
    }

    private static final int COLOR_MENU_ID = Menu.FIRST;
    private static final int EMBOSS_MENU_ID = Menu.FIRST + 1;
    private static final int BLUR_MENU_ID = Menu.FIRST + 2;
    private static final int ERASE_MENU_ID = Menu.FIRST + 3;
    private static final int SRCATOP_MENU_ID = Menu.FIRST + 4;

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);

        menu.add(0, COLOR_MENU_ID, 0, "Color").setShortcut('3', 'c');
        menu.add(0, EMBOSS_MENU_ID, 0, "Emboss").setShortcut('4', 's');
        menu.add(0, BLUR_MENU_ID, 0, "Blur").setShortcut('5', 'z');
        menu.add(0, ERASE_MENU_ID, 0, "Erase").setShortcut('5', 'z');
        menu.add(0, SRCATOP_MENU_ID, 0, "SrcATop").setShortcut('5', 'z');

        /****   Is this the mechanism to extend with filter effects?
        Intent intent = new Intent(null, getIntent().getData());
        intent.addCategory(Intent.CATEGORY_ALTERNATIVE);
        menu.addIntentOptions(
                              Menu.ALTERNATIVE, 0,
                              new ComponentName(this, NotesList.class),
                              null, intent, 0, null);
        *****/
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        mPaint.setXfermode(null);
        mPaint.setAlpha(0xFF);

        switch (item.getItemId()) {
            case COLOR_MENU_ID:
                new ColorPickerDialog(this, this, mPaint.getColor()).show();
                return true;
            case EMBOSS_MENU_ID:
                if (mPaint.getMaskFilter() != mEmboss) {
                    mPaint.setMaskFilter(mEmboss);
                } else {
                    mPaint.setMaskFilter(null);
                }
                return true;
            case BLUR_MENU_ID:
                if (mPaint.getMaskFilter() != mBlur) {
                    mPaint.setMaskFilter(mBlur);
                } else {
                    mPaint.setMaskFilter(null);
                }
                return true;
            case ERASE_MENU_ID:
                mPaint.setXfermode(new PorterDuffXfermode(
                                                        PorterDuff.Mode.CLEAR));
                return true;
            case SRCATOP_MENU_ID:
                mPaint.setXfermode(new PorterDuffXfermode(
                                                    PorterDuff.Mode.SRC_ATOP));
                mPaint.setAlpha(0x80);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

这篇关于在哪里可以找到Android“Fingerpaint"演示?(Android Studio时代)的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆