Android uri转真实路径。
在华为手机上选择图片的时候。拿到一个这样的路径：（华为手机进打开图库-》下载内容-》browser-》图片收藏-》选择图片）
content://com.android.providers.downloads.documents/document/raw:/storage/emulated/0/Download/browser/图片收藏/200832810200350_2.jpgemmm.这个uri怎么转换都不成功。之前的转换方法：
@TargetApi(Build.VERSION_CODES.KITKAT)
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];
}
}
// DownloadsProvider
else if (isDownloadsDocument(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 uri.getPath();
}
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);
}
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG, "GetDataColumnFail", e);
} 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());
}之前一直这么用，直到遇到了这次，之前选择以后的路径都是类似这种：
content://com.android.providers.media.documents/document/image%3A836956这次的路径是：
content://com.android.providers.downloads.documents/document/raw:/storage/emulated/0/Download/browser/图片收藏/200832810200350_2.jpg这个会进到isDownloadsDocument这个判断中，代码里是拿到long类型的id.可是我们这个拿到的id是：
raw:/storage/emulated/0/Download/browser/图片收藏/200832810200350_2.jpg"这样就会报转换错误。
java.lang.NumberFormatException: For input string: "raw:/storage/emulated/0/Download/browser/图片收藏/200832810200350_2.jpg"找了很多资料，最后找到解决办法。
if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
if (id.startsWith("raw:")) {
return id.replaceFirst("raw:", "");
}
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}我们也可以看到raw后面返回的其实就是真实路径，所以我们直接取出来就好了。
完整的代码：
@SuppressLint("NewApi")
public static String getPathFromUri(final Context context, final Uri uri) {
if (uri == null) {
return null;
}
// 判斷是否為Android 4.4之後的版本
final boolean after44 = Build.VERSION.SDK_INT >= 19;
if (after44 && DocumentsContract.isDocumentUri(context, uri)) {
// 如果是Android 4.4之後的版本，而且屬於文件URI
final String authority = uri.getAuthority();
// 判斷Authority是否為本地端檔案所使用的
if ("com.android.externalstorage.documents".equals(authority)) {
// 外部儲存空間
final String docId = DocumentsContract.getDocumentId(uri);
final String[] divide = docId.split(":");
final String type = divide[0];
if ("primary".equals(type)) {
String path = Environment.getExternalStorageDirectory().getAbsolutePath().concat("/").concat(divide[1]);
return path;
} else {
String path = "/storage/".concat(type).concat("/").concat(divide[1]);
return path;
}
} else if ("com.android.providers.downloads.documents".equals(authority)) {
// 下載目錄
final String docId = DocumentsContract.getDocumentId(uri);
if (docId.startsWith("raw:")) {
final String path = docId.replaceFirst("raw:", "");
return path;
}
final Uri downloadUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.parseLong(docId));
String path = queryAbsolutePath(context, downloadUri);
return path;
} else if ("com.android.providers.media.documents".equals(authority)) {
// 圖片、影音檔案
final String docId = DocumentsContract.getDocumentId(uri);
final String[] divide = docId.split(":");
final String type = divide[0];
Uri mediaUri = null;
if ("image".equals(type)) {
mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
mediaUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
mediaUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
} else {
return null;
}
mediaUri = ContentUris.withAppendedId(mediaUri, Long.parseLong(divide[1]));
String path = queryAbsolutePath(context, mediaUri);
return path;
}
} else {
// 如果是一般的URI
final String scheme = uri.getScheme();
String path = null;
if ("content".equals(scheme)) {
// 內容URI
path = queryAbsolutePath(context, uri);
} else if ("file".equals(scheme)) {
// 檔案URI
path = uri.getPath();
}
return path;
}
return null;
}
public static String queryAbsolutePath(final Context context, final Uri uri) {
final String[] projection = {MediaStore.MediaColumns.DATA};
Cursor cursor = null;
try {
cursor = context.getContentResolver().query(uri, projection, null, null, null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
return cursor.getString(index);
}
} catch (final Exception ex) {
ex.printStackTrace();
if (cursor != null) {
cursor.close();
}
}
return null;
}每日语录：
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