解决调用系统自带摄像头录像时从uri里面拿到的路径为空

来源：互联网发布：光盘数据循环冗余错误编辑：程序博客网时间：2024/05/16 15:15

首先感谢http://www.2cto.com/kf/201502/376975.html这篇文章的创作者
前几天调用系统摄像头录像后保存到一个路径上传视频（魅族3 android 5.0），发现拿到的uri拿不到路径为空，找了好久找不到解决方法，结果发现android4.4之前和之后的uri格式是不同的，输出uri发现他的格式是这样的

content://com.android.providers.media.documents/document/image%2706

而以前用的uri是这样的

Uri ： content://media/extenral/images/media/17766

4.4之前所以我们使用以前的这种方法是用不了的

if (data.getScheme().toString().compareTo("content") == 0) {                                    cursor = getContentResolver().query(data,                                            new String[] {Audio.Media.DATA}, null, null, null);                                    if (cursor.moveToFirst()) {                                        filename = cursor.getString(0);                                    }                                }else if (data.getScheme().toString().compareTo("file") == 0)         //file:///开头的uri                                {                                    filename = data.toString();                                    filename = data.toString().replace("file://", "");                                    //替换file://                                    if(!filename.startsWith("/mnt")){                                        //加上"/mnt"头                                        filename += "/mnt";                                     }                                }

那么贴解决代码

import android.annotation.SuppressLint;import android.content.ContentUris;import android.content.Context;import android.database.Cursor;import android.net.Uri;import android.os.Build;import android.os.Environment;import android.provider.DocumentsContract;import android.provider.MediaStore;public class GetPathFromUri4kitkat {    /**     * 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());    }}

这样在这里就能拿到了

public void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == Activity.RESULT_OK) {            Uri uri = data.getData();            System.out.println(GetPathFromUri4kitkat.getPath(                    AmusementActivity.this, uri));            RealPath = GetPathFromUri4kitkat.getPath(AmusementActivity.this,                    uri);        }

这样就解决了啊哈哈哈哈哈感谢http://www.2cto.com/kf/201502/376975.html的作者

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