我使用的是自定义视图，并在我使用的画布中，用户可以画任何东西之后，我想保存在SD卡上BT的形象是不是能够做到这一点。不知道是怎么回事。

I am using an custom view and in that i am using an canvas in which a user can draw anything and after that i want to save that image in sd card bt was not able to do that. Don't know what is going on.

else if(view.getId()==R.id.save_btn){
            //save drawing
            AlertDialog.Builder saveDialog = new AlertDialog.Builder(this);
            saveDialog.setTitle("Save drawing");
            saveDialog.setMessage("Save drawing to device Gallery?");
            saveDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener(){
                private FileOutputStream fOut;

                public void onClick(DialogInterface dialog, int which){
                    //save drawing
                    drawView.setDrawingCacheEnabled(true);

                    //attempt to save
                    String imgSaved = MediaStore.Images.Media.insertImage(
                            getContentResolver(), drawView.getDrawingCache(),
                            UUID.randomUUID().toString()+".png", "drawing");
                    //feedback
                    if(imgSaved!=null){
                        Toast savedToast = Toast.makeText(getApplicationContext(), 
                                "Drawing saved to Gallery!", Toast.LENGTH_SHORT);
                        savedToast.show();
                    }
                    else{
                        Toast unsavedToast = Toast.makeText(getApplicationContext(), 
                                "Oops! Image could not be saved.", Toast.LENGTH_SHORT);
                        unsavedToast.show();
                    }
                    drawView.destroyDrawingCache();
                }
            });
            saveDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener(){
                public void onClick(DialogInterface dialog, int which){
                    dialog.cancel();
                }
            });
            saveDialog.show();
        }

这是错误的详细信息

HERE IS THE ERROR DETAILS

04-14 11:24:28.700: E/MediaStore(6866): Failed to insert image
04-14 11:24:28.700: E/MediaStore(6866): java.io.FileNotFoundException: No such file or directory
04-14 11:24:28.700: E/MediaStore(6866):     at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:146)
04-14 11:24:28.700: E/MediaStore(6866):     at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:577)
04-14 11:24:28.700: E/MediaStore(6866):     at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:673)
04-14 11:24:28.700: E/MediaStore(6866):     at android.content.ContentResolver.openOutputStream(ContentResolver.java:537)
04-14 11:24:28.700: E/MediaStore(6866):     at android.content.ContentResolver.openOutputStream(ContentResolver.java:513)
04-14 11:24:28.700: E/MediaStore(6866):     at android.provider.MediaStore$Images$Media.insertImage(MediaStore.java:891)
04-14 11:24:28.700: E/MediaStore(6866):     at com.example.clent.MainActivity$9.onClick(MainActivity.java:238)
04-14 11:24:28.700: E/MediaStore(6866):     at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:166)
04-14 11:24:28.700: E/MediaStore(6866):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-14 11:24:28.700: E/MediaStore(6866):     at android.os.Looper.loop(Looper.java:137)
04-14 11:24:28.700: E/MediaStore(6866):     at android.app.ActivityThread.main(ActivityThread.java:5103)
04-14 11:24:28.700: E/MediaStore(6866):     at java.lang.reflect.Method.invokeNative(Native Method)
04-14 11:24:28.700: E/MediaStore(6866):     at java.lang.reflect.Method.invoke(Method.java:525)
04-14 11:24:28.700: E/MediaStore(6866):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
04-14 11:24:28.700: E/MediaStore(6866):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-14 11:24:28.700: E/MediaStore(6866):     at dalvik.system.NativeStart.main(Native Method)

我总是得到这个消息，而试图挽救形象......糟糕！图片不能保存。......

I am always getting this message while trying to save image...."Oops! Image could not be saved.".....

推荐答案

晚了一些答案，但仍...

A bit late answer, but still...

不知道这是行238，但可能的原因是在这里：

Not sure which is line 238, but probably the reason is here:

字符串imgSaved = MediaStore.Images.Media.insertImage（                               getContentResolver（），drawView.getDrawingCache（），                               。UUID.randomUUID（）的toString（）+PNG，绘图）;

String imgSaved = MediaStore.Images.Media.insertImage( getContentResolver(), drawView.getDrawingCache(), UUID.randomUUID().toString()+".png", "drawing");

由于该方法是在一个点击监听器 getContentResolver 可返回从一个应用程序不同的解析器。无论是保存私人参考内容解析，或者你可以尝试更换 getContentResolver 与 MainActivity.this.getContentResolver（）

Since the method is within a click listener getContentResolver may be returning a Resolver different from the one for the application. Either save a private reference to the content resolver, or you could try replacing getContentResolver with MainActivity.this.getContentResolver() :

字符串imgSaved = MediaStore.Images.Media.insertImage（                               MainActivity.this.getContentResolver（），                               drawView.getDrawingCache（），                               UUID.randomUUID（）的toString（）+png格式，                               绘图）;

String imgSaved = MediaStore.Images.Media.insertImage( MainActivity.this.getContentResolver(), drawView.getDrawingCache(), UUID.randomUUID().toString() + ".png", "drawing");

或者，它可能是一个问题的权限管理。确保在清单中有：

Alternatively, it might be a permissioning problem. Make sure in the manifest you have:

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

最后一个音符， insertImage 的结果是一个URI， imgSaved 不是最好的名字该变量：）

One final note, the result of insertImage is an URI, imgSaved is not the best name for that variable :)