保存的图像后无法在Gallery android中看到它

时间:2014-09-11 06:52:55

标签: android inputstream android-drawable outputstream android-mediascanner

我使用res/drawableGallery将图片从InputStream保存到OutputStream。它工作正常,保存图像。但问题是它不会更新图库中的图像。如果我使用ES File Explorer检查文件夹,那么我可以在那里看到图像。我还检查了ddms,一旦write代码执行,它也会在那里更新图像。

如果保存服务器映像,它的工作正常。如何防止这个问题?我想在图像保存后立即更新图库。

我也尝试MediaScanner扫描文件夹但没有效果。

我的代码:

Toast.makeText(context, "Downloading Image...\nPlease Wait.",
                Toast.LENGTH_LONG).show();

        File direct = new File(Environment.getExternalStorageDirectory()
                + "/Images");

        if (!direct.exists()) {
            direct.mkdirs();
        }

        DateFormat dateFormat = new SimpleDateFormat("ddMMyyyy-HHmmss");
        Date date = new Date();
        String CurrentDateTime = dateFormat.format(date);

        InputStream input = null;
        OutputStream output = null;

        try {
            input = context.getResources().openRawResource(
                    context.getResources().getIdentifier(
                            "@drawable/" + picName, "drawable",
                            context.getPackageName()));
            output = new FileOutputStream(direct + "/" + "IMG-"
                    + CurrentDateTime + ".jpg");

            byte[] buf = new byte[1024];
            int len;
            while ((len = input.read(buf)) > 0) {
                output.write(buf, 0, len);
            }

            MediaScannerConnection.scanFile(context,
                    new String[] { direct.toString() }, null,
                    new MediaScannerConnection.OnScanCompletedListener() {
                        public void onScanCompleted(String path, Uri uri) {
                            Log.i("ExternalStorage", "Scanned " + path + ":");
                            Log.i("ExternalStorage", "-> uri=" + uri);
                        }
                    });

            Toast.makeText(context, "Image Saved.", Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            Log.e("Internal Image Save Error->", e.toString());

            Toast.makeText(context,
                    "Couldn't Save Image.\nError:" + e.toString() + "",
                    Toast.LENGTH_LONG).show();
        } finally {
            try {
                if (input != null) {
                    input.close();
                }
                if (output != null) {
                    output.close();
                }
            } catch (IOException ignored) {
                Log.e("Internal Image Save Error->", ignored.toString());

                Toast.makeText(
                        context,
                        "Couldn't Save Image.\nError:" + ignored.toString()
                                + "", Toast.LENGTH_LONG).show();
            }
        }

1 个答案:

答案 0 :(得分:1)

你必须广播外部目录...

sendBroadcast(new Intent(
                Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,
                Uri.parse("file://" + Environment.getExternalStorageDirectory())));

如果你在SD卡中创建外部文件夹,然后它不显示在gallary中,那么使用下面的代码。

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
            Runtime.getRuntime().exec(
                    "am broadcast -a android.intent.action.MEDIA_MOUNTED -d file://"
                            + CommonVariable.abc_FOLDER);
        } else {
            sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,
                    Uri.parse("file://" + CommonVariable.abc_FOLDER)));
        }

其他扫描方法。

Uri contentUri = Uri.fromFile(destFile);
        Intent mediaScanIntent = new Intent(
                Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        mediaScanIntent.setData(contentUri);
        sendBroadcast(mediaScanIntent);

我希望它对你有用。