android – java.io.FileNotFoundException：/file/path.jpg open failed：ENOENT(没有这样的文件或目录)

private void saveImage() throws IOException {
    // Todo Auto-generated method stub

    InputStream header = new FileInputStream("/ClashMMA/res/drawable-hdpi/beatdown.jpg");

    ParseFile file = new ParseFile(toByteArray(header));
    try{
        file.save();
    } catch (ParseException e) {
        e.printstacktrace();
    }

    ParSEObject displayImage = new ParSEObject("displayImage");
    displayImage.put("header",file);
    try{
        displayImage.save();
    } catch (ParseException e1){
        e1.printstacktrace();
    }
}


private byte[] toByteArray(InputStream header) throws IOException {
    // Todo Auto-generated method stub
     ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        int l;
        byte[] data = new byte[1024];
        while ((l = header.read(data,data.length)) != -1) {
          buffer.write(data,l);
        }
        buffer.flush();
        return buffer.toByteArray();

}

android-IOError：[Errno 2]没有这样的文件或目录：u’/…/ RetroApp-debug.apk’

我是kivy库编程的初学者,但是我已经完成了非常简单的应用程序,例如Kivy教程中的.在桌面上,它很酷.但是比我想做的.apk文件(还没有使用过Linux).我已经尝试了很多步骤来制作.apk文件,但是最后,当我安装并打开该程序时.它有一个错误.我尝试了很多规格和new_android,但没有任何效果.最终,我将buildozer更新到了最新版本.但是现在,在buildozer android调试之后,他写了这个错误：

IOError：[Errno 2]没有这样的文件或目录：u / home / kivy / reyyy / .buildozer / android / platform / build / dists / RetroApp / build / outputs / apk / RetroApp-debug.apk.

************* buildozer.spec ***************

[app]

title = Retro App

package.name = retroapp


package.domain = org.test

source.dir = .

source.include_exts = py,png,jpg,kv,atlas

version = 1.0

requirements = kivy

orientation = landscape

osx.python_version = 3

osx.kivy_version = 1.9.1

fullscreen = 1

android.arch = armeabi-v7a

[buildozer]

log_level = 2

warn_on_root = 1

****** python3：main.py *******

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty,ObjectProperty,ReferenceListProperty,StringProperty
from kivy.vector import Vector
from kivy.clock import Clock
from kivy.uix.button import Button
from random import randint,choice


class RetryButton(Button):
    pass

class PongBall(Widget):
    veLocity_y = NumericProperty(0)
    veLocity_x = NumericProperty(0)

    veLocity = ReferenceListProperty(veLocity_x,veLocity_y)
    def move(self):
        self.pos = Vector(*self.veLocity)+self.pos

class PongPaddle(Widget):
    score = NumericProperty(0)

    def bounce_ball(self,ball):
        if self.collide_widget(ball):
            vx,vy = ball.veLocity
            offset = (ball.center_y - self.center_y) / (self.height /10.0)
            bounced = Vector(-1 * vx, vy)
            vel = bounced * 1.1
            ball.veLocity = vel.x, vel.y + offset

class PongGame(Widget):
    ball = ObjectProperty(None)
    player1 = ObjectProperty(None)
    player2 = ObjectProperty(None)
    win = NumericProperty(0)
    middle_rectangle_opacity = NumericProperty(1)
    winner = StringProperty('')
    def __init__(self,**q):
    super().__init__(**q)
        self.btn = RetryButton(width = self.width)
        self.btn.count = 0
        self.max_score = 10

    def serve_ball(self,vel = (10,0)):
        self.ball.center =  self.center
        self.ball.veLocity = Vector(*vel).rotate(choice([randint(0,30),randint(330,360)]))

    def update(self,dt):
        if self.win == 0:

            self.ball.move()
            self.player1.bounce_ball(self.ball)
            self.player2.bounce_ball(self.ball)
            if self.player1.score >= self.max_score or self.player2.score >=self.max_score:
                if self.player1.score >= self.max_score:
                    self.winner = '1'
                else:
                    self.winner = '2'
                self.win = 1
                self.middle_rectangle_opacity = 0

            if (self.ball.y < self.y) or (self.ball.top > self.height):
                self.ball.veLocity_y *= -1

            if self.ball.x<self.x:
                self.player2.score += 1
                self.serve_ball((10,0))
            if self.ball.x > self.width - self.ball.width:
                self.player1.score += 1
                self.serve_ball((-10,0))
        else:
            if self.btn.count == 0:
                self.btn.bind(on_press=self.retry)
                self.add_widget(self.btn)
                self.btn.count += 1

    def on_touch_move(self, touch):
        if touch.x < self.width/3.0:
            self.player1.center_y = touch.y
        if touch.x > self.width - self.width/3.0:
            self.player2.center_y = touch.y

    def retry(self,*q):

        self.player1.score = 0
        self.player2.score = 0
        self.win = 0
        self.middle_rectangle_opacity = 1
        self.serve_ball()
        self.remove_widget(self.btn)
        self.btn.count = 0

class PongApp(App):
    def build(self):
        game = PongGame()
        game.serve_ball()
        Clock.schedule_interval(game.update, 1/30.0)
        return game

if __name__ == '__main__':
    PongApp().run()`

******** KV pong.kv *********

#:kivy 1.0.9
<RetryButton>:
    text: 'Retry'
    font_size: 17
    size: self.width, '100dp'
<PongBall>:
    size:50,50
    canvas.before:
        Ellipse:
            pos: self.pos
            size: self.size

<PongPaddle>:
    size: '25dp','200dp'
    canvas:
        Rectangle:
            pos:self.pos
            size: self.size


<PongGame>:
    ball: pong_ball
    player1: player_left
    player2: player_right
    canvas:
        Color:
            rgba: 1,1,1,root.middle_rectangle_opacity
        Rectangle:
            pos:self.center_x - 5,0
            size: 10, self.height
    Label:
        font_size:35
        center_x: root.center_x
        center_y: root.height/4*3
        text: "Player {} wins!!".format(root.winner)
        color: 1,1,1,root.win
    Label:
        font_size: 70
        center_x: root.width/4
        top: root.top - 50
        text: str(root.player1.score)
    Label:
        font_size: 70
        center_x: root.width/4*3
        top: root.top - 50
        text: str(root.player2.score)
    PongBall:
        id: pong_ball
        center: self.parent.center
    PongPaddle:
        id: player_left
        x: root.x
        center_y: root.center_y
    PongPaddle:
        id: player_right
        x: root.width - self.width
        center_y: root.center_y

请帮我！
瓦迪姆.

解决方法:

请按照以下步骤更改您的Python脚本：

main.py

class PongGame(Widget):
...
    def __init__(self, **kwargs):
        super(PongGame, self).__init__(**kwargs)
...

    def retry(self):

由于您使用的是Python 3.x,因此需要执行以下操作：

>使用python3支持安装Buildozer

git克隆https://github.com/kivy/buildozer

cd buildozer

python setup.py构建

sudo pip install -e.
>在某处下载并提取Crystax NDK(〜/ opt /是一种选择)：https://www.crystax.net/en/download
>在buildozer.spec中指定以下内容：

buildozer.spec

需求= python3crystax,kivy

android.ndk = 10.3.2

android.ndk_path = /opt/crystax-ndk-10.3.2

C:Users<用户名>DownloadsTelegram-RAT-masterTelegram-RAT-masterRAT.spec FileNotFoundError: [Errno 2] 没有这样的文件或目录：