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在类似qq或者微信聊天中 如何根据不同的手机发送图片

作者:笨笨丫头~双  发布日期:2015-10-26 20:26:58

      前一段时间,公司自己要求做多客服开发,但是对于发送图片这一块,当时很苦恼,我用自己的手机(米2)测试,不管是本地,还是云相册,最新照片。都没有问题,但是测试那边一直说图片发不了,而且还会崩。很纳闷。

     后来经过debug,发现4.4以上的手机,它的图片路径居然不一样,有file://开头的,也有content://开头的,还有/mnt/sdcard/开头的,坑爹啊,我自己的手机是4.1的,不一样。

    4.4以前的路径都是Uri : content://media/extenral/images/***,我们在回的时候这样用就可以获取到路径。

   if (resultCode != RESULT_OK) {        //此处的 RESULT_OK 是系统自定义
        return;
    }

    Bitmap bm = null;
    //外界的程序访问ContentProvider所提供数据 可以通过ContentResolver接口
    ContentResolver resolver = getContentResolver();
    if (requestCode == IMAGE_CODE) {
        try {
            Uri originalUri = data.getData();        //获得图片的uri 
            bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);        //显得到bitmap图片
这里开始的第二部分,获取图片的路径:
            String[] proj = {MediaStore.Images.Media.DATA};
            Cursor cursor = managedQuery(originalUri, proj, null, null, null);
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            //最后根据索引值获取图片路径
            String path = cursor.getString(column_index);
        }catch (IOException e) {
            Log.e(TAG,e.toString()); 
        }

    }

 4.4翻阅api 你就会发现,图片的路径边的不统一,采用原来的方法,有的图片就会发送不了,经过查找后发现以下这种方法完美解决了我的问题

   

public class GetPathUri4kitk {
    /**
     * 专为Android4.4设计的从Uri获取文件绝对路径,以前的方法已不好使
     */
    @SuppressLint('NewApi')
    public static String getPath(final Context context, final Uri uri) {

        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(':');
                final String type = split[0];

                if ('primary'.equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + '/' + split[1];
                }
                // TODO handle non-primary volumes
            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final Uri contentUri = ContentUris.withAppendedId(Uri.parse('content://downloads/public_downloads'), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(':');
                final String type = split[0];
                Uri contentUri = null;
                if ('image'.equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ('video'.equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ('audio'.equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = '_id=?';
                final String[] selectionArgs = new String[] { split[1] };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ('content'.equalsIgnoreCase(uri.getScheme())) {
            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ('file'.equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param context
     *            The context.
     * @param uri
     *            The Uri to query.
     * @param selection
     *            (Optional) Filter used in the query.
     * @param selectionArgs
     *            (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */
    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {

        Cursor cursor = null;
        final String column = '_data';
        final String[] projection = { column };
        try {
            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                    null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

    /**
     * @param uri
     *            The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return 'com.android.externalstorage.documents'.equals(uri.getAuthority());
    }

    /**
     * @param uri
     *            The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return 'com.android.providers.downloads.documents'.equals(uri.getAuthority());
    }

    /**
     * @param uri
     *            The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return 'com.android.providers.media.documents'.equals(uri.getAuthority());
    }
}

 

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