机器人：从URI真实路径 [英] android: Get real path from uri
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问题描述
我想仙文件到服务器，我需要从URI真实路径。
我的code：
公共字符串getPathFromURI（上下文的背景下，乌里contentUri）{
如果（contentUri.toString（）的indexOf（文件：///）-1个）{
返回contentUri.getPath（）;
} 光标光标= NULL;
尝试{
的String [] = PROJ {MediaStore.Images.Media.DATA};
光标= context.getContentResolver（）查询（contentUri，凸出，NULL，NULL，NULL）;
INT与Column_Index = cursor.getColumnIndexOrThrow（MediaStore.Images.Media.DATA）;
cursor.moveToFirst（）;
返回cursor.getString（Column_Index中）;
} {最后
如果（指针！= NULL）{
cursor.close（）;
}
}
}
和的onActivityResult：
...
imageName = data.getData（）;
的ImagePath = getPathFromURI（getBaseContext（），imageName）;。Picasso.with（getBaseContext（））负载（imageName）.into（ImageView的）;
...
怎么可能是图像显示在ImageView的，但的ImagePath始终为空？ :)谢谢
编辑：
我如何发送图像到服务器
的HttpClient HttpClient的=新DefaultHttpClient（）;
HttpContext的localContext =新BasicHttpContext（）;
HttpPost httpPost =新HttpPost（[URL到服务器]）;MultipartEntity实体=新MultipartEntity（HttpMultipartMode.BROWSER_COMPATIBLE）;
entity.addPart（uploaded_file_1，新FileBody（新文件（的ImagePath）））;httpPost.setEntity（实体）;
httpClient.execute（httpPost，localContext）;
解决方案
我通过堆栈一些答案了，并找到了解决办法...
公共静态字符串getPathFromURI（最终上下文的背景下，最终乌里URI）{ 最终布尔isKitKat = Build.VERSION.SDK_INT＆GT; = Build.VERSION_ codeS.KITKAT; // DocumentProvider
如果（isKitKat＆放大器;＆放大器; DocumentsContract.isDocumentUri（上下文，URI））{
// ExternalStorageProvider
如果（isExternalStorageDocument（URI））{
最后弦乐的docId = DocumentsContract.getDocumentId（URI）;
最终的String [] =拆分docId.split（：）;
最终字符串类型=拆分[0]; 如果（主.equalsIgnoreCase（类型））{
返回Environment.getExternalStorageDirectory（）+/+割裂[1];
}
}
// DownloadsProvider
否则如果（isDownloadsDocument（URI））{ 最后弦乐ID = DocumentsContract.getDocumentId（URI）;
最后乌里contentUri = ContentUris.withAppendedId（Uri.parse（内容：//下载/ public_downloads），Long.valueOf（ID））; 返回getDataColumn（背景下，contentUri，NULL，NULL）;
}
// MediaProvider
否则如果（isMediaDocument（URI））{
最后弦乐的docId = DocumentsContract.getDocumentId（URI）;
最终的String [] =拆分docId.split（：）;
最终字符串类型=拆分[0]; 乌里contentUri = NULL;
如果（形象.equals（类型））{
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
}否则如果（视频.equals（类型））{
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
}否则如果（音频.equals（类型））{
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
} 最后弦乐选择=_id =？;
最终的String [] = selectionArgs两个新的String [] {
分裂[1]
}; 返回getDataColumn（背景下，contentUri，选择selectionArgs两个）;
}
}
// MediaStore（和一般）
否则，如果（内容.equalsIgnoreCase（uri.getScheme（）））{
返回getDataColumn（背景下，URI，NULL，NULL）;
}
//文件
否则，如果（文件.equalsIgnoreCase（uri.getScheme（）））{
返回uri.getPath（）;
} 返回null;
}公共静态字符串getDataColumn（上下文的背景下，开放的URI，字符串的选择，
的String [] selectionArgs两个）{ 光标光标= NULL;
最后String列=_data;
最终的String [] =投影{
柱
}; 尝试{
光标= context.getContentResolver（）查询（URI，投影，选择，selectionArgs两个，
空值）;
如果（光标=空＆放大器;！＆放大器; cursor.moveToFirst（））{
最终诠释与Column_Index = cursor.getColumnIndexOrThrow（列）;
返回cursor.getString（Column_Index中）;
}
} {最后
如果（指针！= NULL）
cursor.close（）;
}
返回null;
}公共静态布尔isExternalStorageDocument（URI URI）{
返回com.android.externalstorage.documents.equals（uri.getAuthority（））;
}公共静态布尔isDownloadsDocument（URI URI）{
返回com.android.providers.downloads.documents.equals（uri.getAuthority（））;
}公共静态布尔isMediaDocument（URI URI）{
返回com.android.providers.media.documents.equals（uri.getAuthority（））;
}
这会发现即使是奇巧每一种情况下（这是问题...奇巧）
的真实路径I want to sen file to server and I need to get real path from uri.
My code:
public String getPathFromURI(Context context, Uri contentUri) {
if ( contentUri.toString().indexOf("file:///") > -1 ){
return contentUri.getPath();
}
Cursor cursor = null;
try {
String[] proj = { MediaStore.Images.Media.DATA };
cursor = context.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}finally {
if (cursor != null) {
cursor.close();
}
}
}
And onActivityResult:
...
imageName = data.getData();
imagePath = getPathFromURI(getBaseContext(),imageName);
Picasso.with(getBaseContext()).load(imageName).into(imageView);
...
How it's possible that image shows in ImageView , but imagePath is ALWAYS null ? :) Thanks
EDIT:
How i send image to server
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost([URL TO A SERVER]);
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
entity.addPart("uploaded_file_1", new FileBody(new File( imagePath )));
httpPost.setEntity(entity);
httpClient.execute(httpPost, localContext);
解决方案
I went through some answers on stack, and found the solution...
public static String getPathFromURI(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];
}
}
// 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;
}
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;
}
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
This will find the real path in every case even for kitkat (that was the problem... kitkat)
这篇关于机器人：从URI真实路径的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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