Android11文件存储

因Android11谷歌禁止使用requestLegacyExternalStorage 。
故将存储方式分为两种方式来进行文件存储，代码如下： 

  

   

    

     

    
    

     

      package com.demo.demo.utils;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import android.Manifest;
     
    
   

    

     

    
    

     

      import android.content.ContentResolver;
     
    
   

    

     

    
    

     

      import android.content.ContentValues;
     
    
   

    

     

    
    

     

      import android.content.Context;
     
    
   

    

     

    
    

     

      import android.content.Intent;
     
    
   

    

     

    
    

     

      import android.content.pm.PackageManager;
     
    
   

    

     

    
    

     

      import android.graphics.Bitmap;
     
    
   

    

     

    
    

     

      import android.net.Uri;
     
    
   

    

     

    
    

     

      import android.os.Build;
     
    
   

    

     

    
    

     

      import android.os.Environment;
     
    
   

    

     

    
    

     

      import android.provider.MediaStore;
     
    
   

    

     

    
    

     

      import android.text.format.DateUtils;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import java.io.File;
     
    
   

    

     

    
    

     

      import java.io.FileNotFoundException;
     
    
   

    

     

    
    

     

      import java.io.FileOutputStream;
     
    
   

    

     

    
    

     

      import java.io.IOException;
     
    
   

    

     

    
    

     

      import java.io.OutputStream;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import androidx.core.content.ContextCompat;
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      /**
     
    
   

    

     

    
    

     

       * 创建时间：2021/4/15
     
    
   

    

     

    
    

     

       * 功能描述：图片保存至本地
     
    
   

    

     

    
    

     

       */
     
    
   

    

     

    
    

     

      public class PictureStorageUtils {
     
    
   

    

     

    
    

     

          public static boolean isSaveImage(Context context, Bitmap bm, String account) {
     
    
   

    

     

    
    

     

              boolean isSave;
     
    
   

    

     

    
    

     

              if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) { //大于等于android 10
     
    
   

    

     

    
    

     

                  isSave = saveImageQ(context, bm, account);
     
    
   

    

     

    
    

     

              } else {
     
    
   

    

     

    
    

     

                  isSave = saveImage(context, bm, name);
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

              return isSave;
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          //2021/4/15 功能描述：转换为jpg格式保存到本地后并获取本地图片并显示(Android10及以下版本适用的方法)
     
    
   

    

     

    
    

     

          public static boolean saveImage(Context context, Bitmap outB, String name) {
     
    
   

    

     

    
    

     

              String imgName = MStringUtils.isNullOrEmpty(name) ? MOtherUtils.getPictureStorageTime() : name;
     
    
   

    

     

    
    

     

              //File.separator就是文件路径
     
    
   

    

     

    
    

     

              String fileName = Environment.getExternalStorageDirectory() + File.separator + "DCIM"
     
    
   

    

     

    
    

     

                      + File.separator + "demo" + File.separator;
     
    
   

    

     

    
    

     

              try {
     
    
   

    

     

    
    

     

                  File file = new File(fileName);
     
    
   

    

     

    
    

     

                  if (!file.exists()) {
     
    
   

    

     

    
    

     

                      file.mkdirs();
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

                  MLog.e("saveAndGetImage:" + file);
     
    
   

    

     

    
    

     

                  File filePath = new File(file + "/" + imgName + ".png");
     
    
   

    

     

    
    

     

                  MLog.e("filePath:" + filePath);
     
    
   

    

     

    
    

     

                  FileOutputStream out = new FileOutputStream(filePath); //保存到本地，格式为JPEG
     
    
   

    

     

    
    

     

                  if (outB.compress(Bitmap.CompressFormat.PNG, 100, out)) {
     
    
   

    

     

    
    

     

                      out.flush();
     
    
   

    

     

    
    

     

                      out.close();
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

                  MLog.e("saveAndGetImage:END");
     
    
   

    

     

    
    

     

                  //刷新图库
     
    
   

    

     

    
    

     

                  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {//高于22版本要手动授权
     
    
   

    

     

    
    

     

                      // 检查该权限是否已经获取
     
    
   

    

     

    
    

     

                      int i = ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE);
     
    
   

    

     

    
    

     

                      // 权限是否已经 授权 GRANTED---授权  DINIED---拒绝
     
    
   

    

     

    
    

     

                      if (i != PackageManager.PERMISSION_GRANTED) {
     
    
   

    

     

    
    

     

                          // 提示用户应该去应用设置界面手动开启权限
     
    
   

    

     

    
    

     

                      } else {
     
    
   

    

     

    
    

     

                          context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(filePath)));
     
    
   

    

     

    
    

     

                      }
     
    
   

    

     

    
    

     

                  } else {
     
    
   

    

     

    
    

     

                      context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(filePath)));
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

                  return true;
     
    
   

    

     

    
    

     

              } catch (FileNotFoundException e) {
     
    
   

    

     

    
    

     

                  MLog.e("FileNotFoundException e.toString: " + e.toString());
     
    
   

    

     

    
    

     

                  e.printStackTrace();
     
    
   

    

     

    
    

     

                  return false;
     
    
   

    

     

    
    

     

              } catch (IOException e) {
     
    
   

    

     

    
    

     

                  MLog.e("IOException e.toString: " + e.toString());
     
    
   

    

     

    
    

     

                  e.printStackTrace();
     
    
   

    

     

    
    

     

                  return false;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          //2021/4/15 功能描述：Android10及以上保存图片到相册
     
    
   

    

     

    
    

     

          public static boolean saveImageQ(Context context, Bitmap image, String name) {
     
    
   

    

     

    
    

     

              Long mImageTime = System.currentTimeMillis();
     
    
   

    

     

    
    

     

              String mImageFileName = MStringUtils.isNullOrEmpty(name) ? MOtherUtils.getPictureStorageTime() : name;
     
    
   

    

     

    
    

     

              final ContentValues values = new ContentValues();
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DCIM
     
    
   

    

     

    
    

     

                      + File.separator + "demo"); //图库中显示的文件夹名。
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.DISPLAY_NAME, mImageFileName);
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.MIME_TYPE, "image/png");
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.DATE_ADDED, mImageTime / 1000);
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.DATE_MODIFIED, mImageTime / 1000);
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.DATE_EXPIRES, (mImageTime + DateUtils.DAY_IN_MILLIS) / 1000);
     
    
   

    

     

    
    

     

              values.put(MediaStore.MediaColumns.IS_PENDING, 1);
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

              ContentResolver resolver = context.getContentResolver();
     
    
   

    

     

    
    

     

              final Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
     
    
   

    

     

    
    

     

              try {
     
    
   

    

     

    
    

     

                  // 写下我们截图的实际数据
     
    
   

    

     

    
    

     

                  try (OutputStream out = resolver.openOutputStream(uri)) {
     
    
   

    

     

    
    

     

                      if (!image.compress(Bitmap.CompressFormat.PNG, 100, out)) {
     
    
   

    

     

    
    

     

                          throw new IOException("Failed to compress");
     
    
   

    

     

    
    

     

                      }
     
    
   

    

     

    
    

     

                  }
     
    
   

    

     

    
    

     

                  // 一切都很顺利、
     
    
   

    

     

    
    

     

                  values.clear();
     
    
   

    

     

    
    

     

                  values.put(MediaStore.MediaColumns.IS_PENDING, 0);
     
    
   

    

     

    
    

     

                  values.putNull(MediaStore.MediaColumns.DATE_EXPIRES);
     
    
   

    

     

    
    

     

                  resolver.update(uri, values, null, null);
     
    
   

    

     

    
    

     

                  return true;
     
    
   

    

     

    
    

     

              } catch (IOException e) {
     
    
   

    

     

    
    

     

                  MLog.e(e.getMessage());
     
    
   

    

     

    
    

     

                  return false;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

  

   

    

     

    
    

     

      对ll_dialog进行截图：
     
    
   

    

     

    
    

     

      Bitmap bm = Bitmap.createBitmap(ll_dialog.getWidth(), ll_dialog.getHeight(),
     
    
   

    

     

    
    

     

              Bitmap.Config.ARGB_8888);
     
    
   

    

     

    
    

     

      Canvas canvas = new Canvas(bm);
     
    
   

    

     

    
    

     

      ll_dialog.draw(canvas);
     
    
  
 

调用
RichPictureStorageUtils.isSaveImage(Activity.this, bm,name);

  

   

    

     

    
    

     

      public static final String[] STANDARD_DIRECTORIES = {
     
    
   

    

     

    
    

     

              DIRECTORY_MUSIC,
     
    
   

    

     

    
    

     

              DIRECTORY_PODCASTS,
     
    
   

    

     

    
    

     

              DIRECTORY_RINGTONES,
     
    
   

    

     

    
    

     

              DIRECTORY_ALARMS,
     
    
   

    

     

    
    

     

              DIRECTORY_NOTIFICATIONS,
     
    
   

    

     

    
    

     

              DIRECTORY_PICTURES,
     
    
   

    

     

    
    

     

              DIRECTORY_MOVIES,
     
    
   

    

     

    
    

     

              DIRECTORY_DOWNLOADS,
     
    
   

    

     

    
    

     

              DIRECTORY_DCIM,
     
    
   

    

     

    
    

     

              DIRECTORY_DOCUMENTS,
     
    
   

    

     

    
    

     

              DIRECTORY_AUDIOBOOKS,
     
    
   

    

     

    
    

     

      };
     
    
  
 

文章来源: shuaici.blog.csdn.net，作者：帅次，版权归原作者所有，如需转载，请联系作者。

原文链接：shuaici.blog.csdn.net/article/details/116942978