android – 将Bitmap写入外部存储(sdcard)

我正在尝试将我在某些活动中的Bitmap保存到我为此目的创建的目录中的外部存储.将图像保存到SD卡(外部存储器,而不是外部sd)的方法是在不同的类(和不同的包)中,所以我假设我需要上下文,但我找不到任何给出上下文的地方(试过openFiLeoutput)但它获取的String filename不能包含路径分隔符).当我运行我的代码时,我在log cat中收到此错误：

04-11 22:13:14.899: E/error(13833): /mnt/sdcard/myTomatoes/covers/378194.PNG: open                  Failed: ENOENT (No such file or directory)
04-11 22:13:14.899: W/System.err(13833): java.io.FileNotFoundException: /mnt/sdcard/myTomatoes/covers/378194.PNG: open Failed: ENOENT (No such file or directory)
04-11 22:13:14.899: W/System.err(13833):    at libcore.io.IoBridge.open(IoBridge.java:416)
04-11 22:13:14.899: W/System.err(13833):    at java.io.FiLeoutputStream.<init>(FiLeoutputStream.java:88)
04-11 22:13:14.899: W/System.err(13833):    at java.io.FiLeoutputStream.<init>(FiLeoutputStream.java:73)
04-11 22:13:14.899: W/System.err(13833):    at     Bl.ImageMethods.SaveImageToMemory(ImageMethods.java:60)
04-11 22:13:14.899: W/System.err(13833):    at com.example.myTomatoes.MovieDetailsActivity$4.onClick(MovieDetailsActivity.java:337)
04-11 22:13:14.899: W/System.err(13833):    at com.android.internal.app.AlertController$ButtonHandler.handlemessage(AlertController.java:166)
04-11 22:13:14.899: W/System.err(13833):    at android.os.Handler.dispatchmessage(Handler.java:99)
04-11 22:13:14.899: W/System.err(13833):    at android.os.Looper.loop(Looper.java:137)
04-11 22:13:14.899: W/System.err(13833):    at android.app.ActivityThread.main(ActivityThread.java:5039)
04-11 22:13:14.899: W/System.err(13833):    at java.lang.reflect.Method.invokeNative(Native Method)
04-11 22:13:14.899: W/System.err(13833):    at java.lang.reflect.Method.invoke(Method.java:511)
04-11 22:13:14.899: W/System.err(13833):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-11 22:13:14.899: W/System.err(13833):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-11 22:13:14.899: W/System.err(13833):    at dalvik.system.NativeStart.main(Native Method)
04-11 22:13:14.899: W/System.err(13833): Caused by: libcore.io.ErrnoException: open Failed: ENOENT (No such file or directory)
04-11 22:13:14.899: W/System.err(13833):    at libcore.io.Posix.open(Native Method)
04-11 22:13:14.899: W/System.err(13833):    at libcore.io.blockGuardOs.open(BlockGuardOs.java:110)
04-11 22:13:14.899: W/System.err(13833):    at libcore.io.IoBridge.open(IoBridge.java:400)

这些是我的权限：@H_607_10@

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

这是我保存文件的方法：@H_607_10@

public static void SaveImageToMemory(Context context,Bitmap img,int rottenId) {
        Log.i("SAVE IMAGE","start save");
        File sd = Environment.getExternalStorageDirectory();
        File LOCATIOn = new File(sd.getAbsolutePath()+ "/myTomatoes/covers");
        LOCATIOn.mkdir();
        File dest = new File(LOCATIOn,rottenId + ".PNG");

        try {
            Log.i("SAVE IMAGE","trying to save: " + dest.getPath());
            FiLeoutputStream fos = new FiLeoutputStream(dest);

            img.compress(Bitmap.CompressFormat.PNG,100,fos);
            fos.flush();
            fos.close();
        } catch (IOException E) {
            Log.e("error",e.getmessage());
            e.printStackTrace();
        }
    }

用于创建File对象的所有混乱行都是我试用的结果…原始代码是：@H_607_10@

File LOCATIOn = new File(Environment.getExternalStorageDirectory() + "/myTomatoes/covers");
    File dest = new File(LOCATIOn,rottenId + ".PNG");

我还尝试首先创建ByteArrayOutputStream并将Bitmap压缩为它,然后执行fos.write(mByteArrayOpStream.toByteArray())并且它不起作用.@H_607_10@

顺便说一句,我正在使用模拟器,但我也在几个“Galaxy S”上检查了这个并且发生了相同的错误…(当我尝试在手机或DDMS中浏览文件时,我可以看到它没有’甚至创建文件夹……@H_607_10@