Question

我想拍摄截图并将其保存在图库中。我尝试过：

CCSize size = CCDirector::sharedDirector()->getWinSize();

CCRenderTexture* texture = CCRenderTexture::create((int)size.width, (int)size.height, kCCTexture2DPixelFormat_RGBA8888);
texture->setPosition(ccp(size.width/2, size.height/2));
texture->begin();
CCDirector::sharedDirector()->getRunningScene()->visit();
texture->end();
texture->saveToFile("scrshot.png", kCCImageFormatJPEG);

在iOS中它运行良好，能够将图像保存到文档中，但问题出在android中：

有两种可能性

1）texture-＆gt; saveToFile（＆＃34; scrshot.png＆＃34;，kCCImageFormatJPEG）;或纹理 - > saveToFile（＆＃34;我的路径＆＃34;）; - ＆GT;它编译但图像保存在哪里？

2）使用JNI保存位图文件 - ＆gt;问题是如何将CCRenderTexture转换为Bitmap并解析它。

Answer 1

我很快就解决了这个问题，但忘记给出答案，但现在给予答案，因为它可能有助于某人

我的代码仅适用于iOS和Android

代码是

CCSize size = CCDirector::sharedDirector()->getWinSize();

CCRenderTexture* texture = CCRenderTexture::create((int)size.width, (int)size.height, kCCTexture2DPixelFormat_RGBA8888);
texture->setPosition(ccp(size.width/2, size.height/2));
texture->begin();
CCDirector::sharedDirector()->getRunningScene()->visit();
texture->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)

    std::string str =  CCFileUtils::sharedFileUtils()->getWritablePath();
    str.append("/imageNameToSave.png");
    const char * c = str.c_str();
    texture->saveToFile(c);
    SaveImageAndroidJNI(true);

#else

        texture->saveToFile("imageNameToSave.png", kCCImageFormatPNG);
        BridgeClass::shared()->saveTOAlbum();

#endif

在我的BridgeClass中

void BridgeClass:: saveTOAlbum(){

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *yourArtPath = [documentsDirectory stringByAppendingPathComponent:@"/imageNameToSave.png"];

    UIImage *image = [UIImage imageWithContentsOfFile:yourArtPath];

    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert !" message:@"Photo Saved To Photos." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    [alert show];
}

对于iOS，它将保存到图库

对于android，有一个类androidJNI.cpp

void SaveImageAndroidJNI(bool visible){
        JniMethodInfo t;
        if (JniHelper::getStaticMethodInfo(t, "yourPackageName/ClassName"
                                           ,"SaveImageAndroidJNI"
                                           ,"(Z)V"))
        {
            t.env->CallStaticVoidMethod(t.classID,t.methodID,visible);
        }
    }

用于将图像保存到数据/数据的android原生方法

static void SaveImageAndroidJNI(final boolean visible)
{

    ContextWrapper c = new ContextWrapper(me);
    String path = c.getFilesDir().getPath() + "/imageNameToSave.png";
    System.out.println("Paht to check --"+path);
    File imgFile = new  File(path);

    Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
    ArrayList<Uri> uris = new ArrayList<Uri>();
    uris.add(Uri.parse(path));

    OutputStream output;
 // Find the SD Card path
    File filepath = Environment.getExternalStorageDirectory();

    // Create a new folder in SD Card
    File dir = new File(filepath.getAbsolutePath()
            + "/Your Folder Name/");
    dir.mkdirs();

    // Create a name for the saved image
    File file = new File(dir, "imageNameToSave.png");

    try {

        output = new FileOutputStream(file);

        // Compress into png format image from 0% - 100%
        myBitmap.compress(Bitmap.CompressFormat.PNG, 100, output);
        output.flush();
        output.close();
    }

    catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


    Intent intent = new Intent();
    Uri pngUri = Uri.fromFile(file);


    intent.setAction(Intent.ACTION_SEND);
    intent.putExtra(Intent.EXTRA_STREAM, pngUri);
    intent.setType("image/jpeg");

        me.startActivity(Intent.createChooser(intent, "Share Image"));    
}

从数据/数据访问此图像时无法直接访问此处将此图像保存到SD卡并从cocos2dx访问它

但是对于android必须使用getWritablePath函数获取可写路径并将此值解析为saveToFile函数并且SaveImageAdmobJNI(true);将调用本机方法，在本机方法中，您可以保存获取图像路径并将其保存到库

注意： getWritablePath（） - 此函数将为您提供数据路径 - ＆gt; data-＆gt; YOUR_PAKAGE

随意提问。

cocos2dx将图像保存到图库android

1 个答案: