在手机中保存位图返回文件未找到例外

Question

我想从服务器保存手机中的图像。图像的路径应该类似于Server.I已调试我的代码，我在这个方法中得到了正确的位图。我的代码在这个方法中失败：

//图片路径示例：/sample/resources/images/device/imageName.png

  public static String saveImageInPhone(Bitmap mBitmap, String imagePath, Context mContext) {
            String[] iconName=imagePath.split("/");
            String nameUri=imagePath.replace("/"+iconName[iconName.length-1],"").toString();
            File file = new File (mContext.getExternalFilesDir(Environment.DIRECTORY_PICTURES)+nameUri, iconName[iconName.length-1]);
            if (file.exists ()) file.delete ();
            try {
                FileOutputStream outStream = new FileOutputStream(file);
                mBitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
                return file.getAbsolutePath().toString();
            }
            catch (FileNotFoundException e){
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return file.getAbsolutePath().toString();
        }

错误日志：

java.io.FileNotFoundException: /storage/emulated/0/Android/data/package_name/files/Pictures/sample/resources/images/systemicons/conference01.png:
at libcore.io.IoBridge.open(IoBridge.java:456)
at java.io.FileOutputStream.<init>(FileOutputStream.java:87)
at java.io.FileOutputStream.<init>(FileOutputStream.java:72)
at package_name.utils.ImageUtils.saveImageInPhone(ImageUtils.java:168)
at package_name.adapter.HomeFooterAdapter$1.onBitmapLoaded(HomeFooterAdapter.java:78)
at com.squareup.picasso.TargetAction.complete(TargetAction.java:36)
at com.squareup.picasso.Picasso.deliverAction(Picasso.java:558)
at com.squareup.picasso.Picasso.complete(Picasso.java:510)
at com.squareup.picasso.Picasso$1.handleMessage(Picasso.java:117)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5425)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:928)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:723)
ed by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:186)
at libcore.io.IoBridge.open(IoBridge.java:442)

Answer 1

您需要先创建文件。尝试下面的代码，让我知道它是否工作。在写这篇文章之前我已经创建了新文件。

public static String saveImageInPhone(Bitmap mBitmap, String imagePath, Context mContext) {
            File file = new File (mContext.getExternalFilesDir(Environment.DIRECTORY_PICTURES), imagePath);
            if (file.exists ()) file.delete ();
            try {
                boolean fileCreated = file.createNewFile();
                if (fileCreated){
                     FileOutputStream outStream = new FileOutputStream(file);
                     mBitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
                }
            }
            catch (FileNotFoundException e){
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return file.getAbsolutePath().toString();
        }

Answer 2

父目录可能不存在。使用以下代码：

File file = ...
File parentDir = file.getParent();
if(!parentDir.exists()){
    parentDir.mkdirs();
}
//then save the bitmap in file