Android打开手机相册获取图片路径

278 阅读 0 评论 184 点赞

我是靠谱客的博主和谐帆布鞋，最近开发中收集的这篇文章主要介绍Android打开手机相册获取图片路径，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

本文实例为大家分享了Android打开手机相册获取图片路径的具体代码，供大家参考，具体内容如下

根据打开相机返回的Uri uri = data.getData();获取该相片的真正SD卡路径！

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());
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持靠谱客。