这期内容当中小编将会给大家带来有关如何在Android中获取图片路径,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
权限
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
动态申请权限
String[] mPermissionList = new String[]{ Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}; public static final int REQUEST_PICK_IMAGE = 11101;
打开手机相册
ActivityCompat.requestPermissions(MainActivity.this, mPermissionList, 100);
@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case 100: boolean writeExternalStorage = grantResults[0] == PackageManager.PERMISSION_GRANTED; boolean readExternalStorage = grantResults[1] == PackageManager.PERMISSION_GRANTED; if (grantResults.length > 0 && writeExternalStorage && readExternalStorage) { getImage(); } else { Toast.makeText(this, "请设置必要权限", Toast.LENGTH_SHORT).show(); } break; } } private void getImage() { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) { startActivityForResult(new Intent(Intent.ACTION_GET_CONTENT).setType("image/*"), REQUEST_PICK_IMAGE); } else { Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); intent.addCategory(Intent.CATEGORY_OPENABLE); intent.setType("image/*"); startActivityForResult(intent, REQUEST_PICK_IMAGE); } }
获取相册返回的Uri
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == Activity.RESULT_OK) { switch (requestCode) { case REQUEST_PICK_IMAGE: if (data != null) { String realPathFromUri = RealPathFromUriUtils.getRealPathFromUri(this, data.getData()); } else { Toast.makeText(this, "图片损坏,请重新选择", Toast.LENGTH_SHORT).show(); } break; } } }
这里的data.getData()返回的就是Uri,realPathFromUri 为真正路径
获取真正路径
package com.example.richeditortest; 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.provider.DocumentsContract; import android.provider.MediaStore; public class RealPathFromUriUtils { /** * 根据Uri获取图片的绝对路径 * * @param context 上下文对象 * @param uri 图片的Uri * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null */ public static String getRealPathFromUri(Context context, Uri uri) { int sdkVersion = Build.VERSION.SDK_INT; if (sdkVersion >= 19) { // api >= 19 return getRealPathFromUriAboveApi19(context, uri); } else { // api < 19 return getRealPathFromUriBelowAPI19(context, uri); } } /** * 适配api19以下(不包括api19),根据uri获取图片的绝对路径 * * @param context 上下文对象 * @param uri 图片的Uri * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null */ private static String getRealPathFromUriBelowAPI19(Context context, Uri uri) { return getDataColumn(context, uri, null, null); } /** * 适配api19及以上,根据uri获取图片的绝对路径 * * @param context 上下文对象 * @param uri 图片的Uri * @return 如果Uri对应的图片存在, 那么返回该图片的绝对路径, 否则返回null */ @SuppressLint("NewApi") private static String getRealPathFromUriAboveApi19(Context context, Uri uri) { String filePath = null; if (DocumentsContract.isDocumentUri(context, uri)) { // 如果是document类型的 uri, 则通过document id来进行处理 String documentId = DocumentsContract.getDocumentId(uri); if (isMediaDocument(uri)) { // MediaProvider // 使用':'分割 String id = documentId.split(":")[1]; String selection = MediaStore.Images.Media._ID + "=?"; String[] selectionArgs = {id}; filePath = getDataColumn(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection, selectionArgs); } else if (isDownloadsDocument(uri)) { // DownloadsProvider Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(documentId)); filePath = getDataColumn(context, contentUri, null, null); } } else if ("content".equalsIgnoreCase(uri.getScheme())) { // 如果是 content 类型的 Uri filePath = getDataColumn(context, uri, null, null); } else if ("file".equals(uri.getScheme())) { // 如果是 file 类型的 Uri,直接获取图片对应的路径 filePath = uri.getPath(); } return filePath; } /** * 获取数据库表中的 _data 列,即返回Uri对应的文件路径 * * @return */ private static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { String path = null; String[] projection = new String[]{MediaStore.Images.Media.DATA}; Cursor cursor = null; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { int columnIndex = cursor.getColumnIndexOrThrow(projection[0]); path = cursor.getString(columnIndex); } } catch (Exception e) { if (cursor != null) { cursor.close(); } } return path; } /** * @param uri the Uri to check * @return Whether the Uri authority is MediaProvider */ private static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } /** * @param uri the Uri to check * @return Whether the Uri authority is DownloadsProvider */ private static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } }
上述就是小编为大家分享的如何在Android中获取图片路径了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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