制作网站编程,公众号二次开发,给个网站能用的2022,厦门网站建设厦门前言最近在工作的过程中#xff0c;遇到不同 Android 版本下 URI 采用不同方式来获取文件路径的问题。因为需求的原因#xff0c;要求拍照上传或者从相册中选择图片上传#xff0c;而且图片是需要经过压缩的#xff0c;大小不能超过2M。很快#xff0c;拍照的这部分就搞定…前言最近在工作的过程中遇到不同 Android 版本下 URI 采用不同方式来获取文件路径的问题。因为需求的原因要求拍照上传或者从相册中选择图片上传而且图片是需要经过压缩的大小不能超过2M。很快拍照的这部分就搞定了。那么相册中选择图片的也是一样的道理应该也是轻松解决了。至于选择图片的代码如下所示intent new Intent(Intent.ACTION_GET_CONTENT);intent.addCategory(Intent.CATEGORY_OPENABLE);intent.setType(image/*);startActivityForResult(intent, FILE_CHOOSER_RESULT_CODE);之后就是在 onActivityResult(int requestCode, int resultCode, Intent data)中获取到 URI 。最关键的来了如果通过 URI 来获取文件呢比如现在 URI 为 content://media/extenral/images/media/17766 而我们需要得到对应的文件路径。if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {Cursor cursor context.getContentResolver().query(uri, new String[]{MediaStore.Images.Media.DATA}, null, null, null);if (cursor ! null) {if (cursor.moveToFirst()) {int columnIndex cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);if (columnIndex -1) {path cursor.getString(columnIndex);}}cursor.close();}return path;}原以为万事大吉但是在 Android 4.4 及以上的手机上一试发现根本不行。因为在 Android 4.4 及以上的手机上获取到的 URI 变成了 content://com.android.providers.media.documents/document/image%3A235700 和之前我们预期的不是同一种类型。这是因为在 Android 4.4 及以上的机型使用了 DocumentUri 来代表获取到文件的 URI 。所以我们又要对于 DocumentUri 进行适配。if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {if (DocumentsContract.isDocumentUri(context, uri)) {if (isExternalStorageDocument(uri)) {// ExternalStorageProviderfinal String docId DocumentsContract.getDocumentId(uri);final String[] split docId.split(:);final String type split[0];if (primary.equalsIgnoreCase(type)) {path Environment.getExternalStorageDirectory() / split[1];return path;}} else if (isDownloadsDocument(uri)) {// DownloadsProviderfinal String id DocumentsContract.getDocumentId(uri);final Uri contentUri ContentUris.withAppendedId(Uri.parse(content://downloads/public_downloads),Long.valueOf(id));path getDataColumn(context, contentUri, null, null);return path;} else if (isMediaDocument(uri)) {// MediaProviderfinal 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]};path getDataColumn(context, contentUri, selection, selectionArgs);return path;}}}private 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;}private static boolean isExternalStorageDocument(Uri uri) {return com.android.externalstorage.documents.equals(uri.getAuthority());}private static boolean isDownloadsDocument(Uri uri) {return com.android.providers.downloads.documents.equals(uri.getAuthority());}private static boolean isMediaDocument(Uri uri) { return com.android.providers.media.documents.equals(uri.getAuthority());}好了上面的代码还是容易看懂的。这下就解决了对于 Android 4.4 及以上的机型适配。顺便把以 file:// 开头的 URI 适配也补上if (ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {path uri.getPath();return path;}完美了下面就贴出完整的 FileUtils 代码拿去用吧public final class FileUtils {public static String getFilePathByUri(Context context, Uri uri) {String path null;// 以 file:// 开头的if (ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {path uri.getPath();return path;}// 以 content:// 开头的比如 content://media/extenral/images/media/17766if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme()) Build.VERSION.SDK_INT Build.VERSION_CODES.KITKAT) {Cursor cursor context.getContentResolver().query(uri, new String[]{MediaStore.Images.Media.DATA}, null, null, null);if (cursor ! null) {if (cursor.moveToFirst()) {int columnIndex cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);if (columnIndex -1) {path cursor.getString(columnIndex);}}cursor.close();}return path;}// 4.4及之后的 是以 content:// 开头的比如 content://com.android.providers.media.documents/document/image%3A235700if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme()) Build.VERSION.SDK_INT Build.VERSION_CODES.KITKAT) {if (DocumentsContract.isDocumentUri(context, uri)) {if (isExternalStorageDocument(uri)) {// ExternalStorageProviderfinal String docId DocumentsContract.getDocumentId(uri);final String[] split docId.split(:);final String type split[0];if (primary.equalsIgnoreCase(type)) {path Environment.getExternalStorageDirectory() / split[1];return path;}} else if (isDownloadsDocument(uri)) {// DownloadsProviderfinal String id DocumentsContract.getDocumentId(uri);final Uri contentUri ContentUris.withAppendedId(Uri.parse(content://downloads/public_downloads),Long.valueOf(id));path getDataColumn(context, contentUri, null, null);return path;} else if (isMediaDocument(uri)) {// MediaProviderfinal 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]};path getDataColumn(context, contentUri, selection, selectionArgs);return path;}}}return null;}private 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;}private static boolean isExternalStorageDocument(Uri uri) {return com.android.externalstorage.documents.equals(uri.getAuthority());}private static boolean isDownloadsDocument(Uri uri) {return com.android.providers.downloads.documents.equals(uri.getAuthority());}private static boolean isMediaDocument(Uri uri) { return com.android.providers.media.documents.equals(uri.getAuthority());}}讲完了讲完了。总结以上就是这篇文章的全部内容了希望本文的内容对大家的学习或者工作具有一定的参考学习价值如果有疑问大家可以留言交流谢谢大家对脚本之家的支持。
