android bitmap存储位置,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.(FileOutputStream.java:88)

04-11 22:13:14.899: W/System.err(13833): at java.io.FileOutputStream.(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：

这是我保存文件的方法：

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：

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.

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……