android 直接访问相册图片

官方总结

https://developer.android.google.cn/training/data-storage?hl=zh-cn

Demo (MediaStore 访问相册图片)

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

/data/data/com.android.providers.media.module/databases/external.db
不同系统版本该文件位于不同目录下，/data/data/com.android.providers.media xxx/external.db

package com.cuncaojin.myapplication;import androidx.appcompat.app.AppCompatActivity;import android.Manifest;
import android.annotation.SuppressLint;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.widget.ImageView;import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;import pub.devrel.easypermissions.AfterPermissionGranted;
import pub.devrel.easypermissions.EasyPermissions;/*** 外部存储数据库文件：/data/data/com.android.providers.media.module/databases/external.db,* 不同版本位置略有不同，有的在/data/data/com.android.providers.media/databases/external.db* <p>* su root* <p>* cd /data/data/com.android.providers.media.module/databases && ls -l* <p>* -rw-rw---- 1 u0_a119 u0_a119 131072 2022-03-07 14:23 external.db* -rw------- 1 u0_a119 u0_a119  32768 2022-03-07 16:31 external.db-shm* -rw------- 1 u0_a119 u0_a119 477952 2022-03-07 16:31 external.db-wal* -rw-rw---- 1 u0_a119 u0_a119 233472 2022-03-07 16:31 internal.db* -rw------- 1 u0_a119 u0_a119  32768 2022-03-07 16:31 internal.db-shm* -rw------- 1 u0_a119 u0_a119 524288 2022-03-07 16:31 internal.db-wal*/
public class MainActivity extends AppCompatActivity {public static final String SIMPLE_IMAGE_NAME = "IMG_20220307_142202.jpg";public static final String SIMPLE_IMAGE_NAME2 = "IMG_20220307_141816.jpg";private ImageView iv;private ImageView iv2;private Uri mUri;private Uri mUri2;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);iv = findViewById(R.id.imageView);iv2 = findViewById(R.id.imageView2);requiresPermissions();}public static Uri getImageStreamFromExternal(String imageName) {File externalPubPath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);File imageFile = new File(externalPubPath, imageName);// 等价// File imageFile = new File("/storage/emulated/0/Pictures/IMG_20220307_142202.jpg");Uri uri = null;if (imageFile.exists()) {uri = Uri.fromFile(imageFile);}return uri;}@SuppressLint("Range")public static Uri getMediaUriFromPath(Context context, String path) {Uri mediaUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;Cursor cursor = context.getContentResolver().query(mediaUri,null,MediaStore.Images.Media.DISPLAY_NAME + "= ?",new String[]{path.substring(path.lastIndexOf("/") + 1)},null);Uri uri = null;if (cursor.moveToFirst()) {uri = ContentUris.withAppendedId(mediaUri,cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media._ID)));}cursor.close();return uri;}public List<Uri> getAllShownImagesPath() {Uri uriExternal = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;Cursor cursor;int columnIndexID;List<Uri> listOfAllImages = new ArrayList<>();// /data/data/com.android.providers.media.module/databases/external.db// SELECT _id,//        _display_name//        _data,//   FROM images;// 45 /storage/emulated/0/Pictures/IMG_20220307_142051.jpg    IMG_20220307_142051.jpgString[] projection = new String[]{MediaStore.Images.Media._ID, MediaStore.Images.Media.DISPLAY_NAME, MediaStore.Images.Media.DATA};Long imageId;cursor = getContentResolver().query(uriExternal, projection, null, null, null);if (cursor != null) {columnIndexID = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);int simpleNamePathId = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DISPLAY_NAME);// 废弃字段，不要用int fullNamePathId = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);while (cursor.moveToNext()) {imageId = cursor.getLong(columnIndexID);String simpleNamePath = cursor.getString(simpleNamePathId);String fullNamePath = cursor.getString(fullNamePathId);if (SIMPLE_IMAGE_NAME2.equals(simpleNamePath)) {mUri2 = ContentUris.withAppendedId(uriExternal, imageId);// 或 Uri uriImage = Uri.withAppendedPath(uriExternal, "" + imageId);}Uri uriImage = ContentUris.withAppendedId(uriExternal, imageId);// 或 Uri uriImage = Uri.withAppendedPath(uriExternal, "" + imageId);listOfAllImages.add(uriImage);}cursor.close();}return listOfAllImages;}private void showAlbumPicture() {try {// 左图mUri = getImageStreamFromExternal(SIMPLE_IMAGE_NAME);Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), mUri);iv.setImageBitmap(bitmap);// 右图getAllShownImagesPath();Bitmap bitmap2 = MediaStore.Images.Media.getBitmap(getContentResolver(), mUri2);iv2.setImageBitmap(bitmap2);} catch (IOException e) {e.printStackTrace();}}/// EasyPermissions start /public static final int EXTERNAL_STORAGE_REQUEST_CODE = 111;@AfterPermissionGranted(EXTERNAL_STORAGE_REQUEST_CODE)private void requiresPermissions() {String[] perms = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};if (EasyPermissions.hasPermissions(this, perms)) {// Already have permission, do the thingshowAlbumPicture();} else {// Do not have permissions, request them nowEasyPermissions.requestPermissions(this, getString(R.string.app_name),EXTERNAL_STORAGE_REQUEST_CODE, perms);}}@Overridepublic void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);// Forward results to EasyPermissionsEasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);}/// EasyPermissions end /
}

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android 直接访问相册图片_MediaStore

官方总结

Demo (MediaStore 访问相册图片)

android 直接访问相册图片_MediaStore相关推荐

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