cocos2d-x调用摄像头和相册并裁减图片
最近做个小游戏需要调用手机图库和摄像头并裁减图片，发现网上很多教程不是太全，有的安卓端裁减不了大图，下面是完整代码，可以裁减高清图的。
完整拼图游戏下载:
https://github.com/sky068/Puzzles
1、首先是跨平台入口代码，iOS平台需要把ImageCrop.cpp改成ImageCrop.mm，并且在AppController.mm里调用setViewController(void* viewController)把rootView传进来初始化m_viewController
#ifndef ImageCrop_hpp
#define ImageCrop_hpp
#include 2、iOS端代码，.m文件改成.mm文件
#ifndef ImagePickerViewController_h
#define ImagePickerViewController_h
#import 3、安卓端，安卓平台需要把ImageCrop.java导入工程包里(src下org.cocos2dx.cpp包里)，在主activity(AppActivity.java)的onCreate里调用ImageCrop.getInstance().initImageCrop(this)初始化，然后重载onActivityResult并回调ImageCrop的onActivityResult方法
ImageCrop.java:
package org.cocos2dx.cpp;
import java.io.File;
import java.io.FileNotFoundException;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
public class ImageCrop {
public static final int NONE = 0;
public static final int PHOTOHRAPH = 1;
public static final int PHOTOZOOM = 2;
public static final int PHOTORESOULT = 3;
public static final String IMAGE_UNSPECIFIED = "image/*";
private static ImageCrop instance = null;
private static Activity activity = null;
private static String TAG = "ImageCrop";
public static native void onImageSaved(String path);
//拍摄照片保存路径
private static String savePath = Environment.getExternalStorageDirectory() +"/CropImage";
private static String photoName = "";
private static Uri imgUri = null;
public static ImageCrop getInstance()
{
if(null == instance)
{
instance = new ImageCrop();
}
return instance;
}
//初始化
public void init(Activity activity)
{
ImageCrop.activity = activity;
}
//打开相册
static public void openPhoto()
{
Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
activity.startActivityForResult(intent, PHOTOZOOM);
}
//打开相机
static public void openCamera()
{
File destDir = new File(savePath);
if (!destDir.exists())
{
destDir.mkdirs();
}
photoName = "temp.jpg";
File file = new File(savePath + "/" + photoName);
imgUri = Uri.fromFile(file);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
activity.startActivityForResult(intent, PHOTOHRAPH);
}
//回调
public void onActivityResult(int requestCode,int resultCode,Intent data)
{
if (resultCode == NONE)
return;
// 拍照 不能使用data，因为没有返回是空的
if (requestCode == PHOTOHRAPH)
{
if (imgUri == null)
{
Log.e(TAG, "PHOTOHRAPH imgUri is null");
return;
}
startPhotoZoom(imgUri);
}
if (requestCode == PHOTOZOOM)
{
// 读取相册缩放图片
if (data==null )
{
Log.e(TAG, "data is null");
return;
}
if (data.getData()==null)
{
Log.e(TAG, "data.getData() is null");
return;
}
startPhotoZoom(data.getData());
}
// 处理结果
if (requestCode == PHOTORESOULT)
{
Bitmap bitmap = decodeUriAsBitmap(imgUri);
if (bitmap == null)
{
Log.e(TAG, "bitmap is null");
}
Log.e("ImageCrop", "图片已经保存，通知c++层，");
onImageSaved(savePath + "/" + photoName);
}
}
public void startPhotoZoom(Uri uri)
{
photoName = System.currentTimeMillis() + ".jpg";
File file = new File(savePath,photoName);
imgUri = Uri.fromFile(file);
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 600);
intent.putExtra("outputY", 600);
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
activity.startActivityForResult(intent, PHOTORESOULT);
}
private Bitmap decodeUriAsBitmap(Uri uri)
{
Bitmap bitmap = null;
try {
bitmap = BitmapFactory.decodeStream(activity.getContentResolver().openInputStream(uri));
} catch (FileNotFoundException e) {
// TODO: handle exception
e.printStackTrace();
return null;
}
return bitmap;
}
}
4、示例
HelloWorld工程里直接引入ImageCrop.hpp，调用拍照或者打开相册即可，裁减完成后会返回图片保存路径，直接就可以在C++环境里创建精灵等操作了，欧了！
#include "HelloWorldScene.h"
#include "ImageCrop.hpp"
USING_NS_CC;
Scene* HelloWorld::createScene()
{
// 'scene' is an autorelease object
auto scene = Scene::create();
// 'layer' is an autorelease object
auto layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !Layer::init() )
{
return false;
}
Size visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();
/////////////////////////////
// 2. add a menu item with "X" image, which is clicked to quit the program
// you may modify it.
// add a "close" icon to exit the progress. it's an autorelease object
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
CC_CALLBACK_1(HelloWorld::menuCloseCallback, this));
closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
origin.y + closeItem->getContentSize().height/2));
auto openPhoto = MenuItemFont::create("打开相册", [=](Ref*)
{
ImageCrop::getInstance()->openPhoto([=](std::string path)
{
CCLOG("photo path:%s",path.c_str());
_img -> removeFromParent();
_img = Sprite::create(path);
this->addChild(_img);
_img->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
});
});
openPhoto->setPosition(Vec2(origin.x + openPhoto->getContentSize().width/2 ,
origin.y + openPhoto->getContentSize().height/2));
auto openCamera = MenuItemFont::create("打开相机", [=](Ref*)
{
ImageCrop::getInstance()->openCamera([=](std::string path)
{
CCLOG("photo path:%s",path.c_str());
_img -> removeFromParent();
_img = Sprite::create(path);
this->addChild(_img);
_img->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
});
});
openCamera->setPosition(Vec2(origin.x + openCamera->getContentSize().width/2 ,
origin.y + openCamera->getContentSize().height));
auto menu = Menu::create(closeItem,openPhoto,openCamera, NULL);
menu->setPosition(Vec2::ZERO);
this->addChild(menu, 1);
/////////////////////////////
// 3. add your codes below...
// add a label shows "Hello World"
// create and initialize a label
auto label = Label::createWithTTF("Hello World", "fonts/Marker Felt.ttf", 24);
// position the label on the center of the screen
label->setPosition(Vec2(origin.x + visibleSize.width/2,
origin.y + visibleSize.height - label->getContentSize().height));
// add the label as a child to this layer
this->addChild(label, 1);
// add "HelloWorld" splash screen"
_img = Sprite::create("HelloWorld.png");
// position the sprite on the center of the screen
_img->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2 + origin.y));
// add the sprite as a child to this layer
this->addChild(_img, 0);
return true;
}
void HelloWorld::menuCloseCallback(Ref* pSender)
{
Director::getInstance()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
exit(0);
#endif
}本文参考:
http://blog.csdn.net/floodingfire/article/details/8144587
http://www.myexception.cn/operating-system/1937511.html