Question

我尝试将图像保存到WathsappIMG但是当我去图像库android时我没有看到图像和那里的图像进入目录可以从ES文件资源管理器中看到

OutputStream output;
       // Find the SD Card path
        File filepath = Environment.getExternalStorageDirectory();

      // Create a new folder in SD Card
     File dir = new File(filepath.getAbsolutePath()
              + "/WhatSappIMG/");
        dir.mkdirs(); 

     // Retrieve the image from the res folder
        BitmapDrawable drawable = (BitmapDrawable) principal.getDrawable();
        Bitmap bitmap1 = drawable.getBitmap();

        // Create a name for the saved image
        File file = new File(dir, "Wallpaper.jpg" );

        try {

            output = new FileOutputStream(file);

            // Compress into png format image from 0% - 100%
            bitmap1.compress(Bitmap.CompressFormat.JPEG, 100, output);
            output.flush();
            output.close();

        }

        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

Answer 1

图库不会显示（必要）外部存储空间中的文件。

这是一个常见的错误。

图库显示存储在media store provider

上的图像

您可以使用此方法在媒体商店提供商处存储图像文件：

public static void addImageToGallery(final String filePath, final Context context) {

    ContentValues values = new ContentValues();

    values.put(Images.Media.DATE_TAKEN, System.currentTimeMillis());
    values.put(Images.Media.MIME_TYPE, "image/jpeg");
    values.put(MediaStore.MediaColumns.DATA, filePath);

    context.getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values);
}

Answer 2

这是您应该输入的内容，当您要将图片保存在图库中时

MediaStore.Images.Media.insertImage(getContentResolver(), yourBitmap, yourTitle , yourDescription);

该代码将在图库的末尾添加图像。所以，请检查你的画廊图片，以确保

Answer 3

尝试添加此内容：

MediaStore.Images.Media.insertImage(getContentResolver(), yourBitmap, yourTitle , yourDescription);

填写yourBitmap，yourTitle和yourDescription的详细信息，或者将其保留为""。

Answer 4

您需要将MediaScannerConnection类添加到将图像保存到图库的功能中。此类会扫描与您的应用相关联的图库中的新文件和文件夹。添加以下类以将新保存的图像文件或新添加的图像目录扫描到库或 download Source Code

        MediaScannerConnection.scanFile(this, new String[]{file.toString()}, null,
                new MediaScannerConnection.OnScanCompletedListener() {
                    public void onScanCompleted(String path, Uri uri) {
                        Log.i("ExternalStorage", "Scanned " + path + ":");
                        Log.i("ExternalStorage", "-> uri=" + uri);
                    }
                });

<强> Read more

Answer 5

请参考此代码对我有用：

public static boolean saveImageToGallery(Context context, Bitmap bmp) {
    // First save the picture
    String storePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "dearxy";
    File appDir = new File(storePath);
    if (!appDir.exists()) {
        appDir.mkdir();
    }
    String fileName = System.currentTimeMillis() + ".jpg";
    File file = new File(appDir, fileName);
    try {
        FileOutputStream fos = new FileOutputStream(file);
        //Compress and save pictures by io stream
        boolean isSuccess = bmp.compress(Bitmap.CompressFormat.JPEG, 60, fos);
        fos.flush();
        fos.close();

        //Insert files into the system Gallery
        //MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), fileName, null);

        //Update the database by sending broadcast notifications after saving pictures
        Uri uri = Uri.fromFile(file);
        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));
        if (isSuccess) {
            return true;
        } else {
            return false;
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return false;
}

Answer 6

对于Xamarin研究员：

public static void SaveToTheGalley(this string filePath, Context context)
{
    var values = new ContentValues();
    values.Put(MediaStore.Images.Media.InterfaceConsts.DateTaken, Java.Lang.JavaSystem.CurrentTimeMillis());
    values.Put(MediaStore.Images.Media.InterfaceConsts.MimeType, "image/jpeg");
    values.Put(MediaStore.MediaColumns.Data, filePath);
    context.ContentResolver.Insert(MediaStore.Images.Media.ExternalContentUri, values);
}

请不要忘记android.permission.WRITE_EXTERNAL_STORAGE权限。

Answer 7

为

MediaStore.MediaColumns.Data

和

MediaStore.Images.Media.insertImage

现在不推荐使用

这是我使用位图的方法

fun addImageToGallery(
    fileName: String,
    context: Context,
    bitmap: Bitmap
) {

        val values = ContentValues()
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis())
        }
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg")
        values.put(MediaStore.Images.ImageColumns.DISPLAY_NAME, fileName)
        values.put(MediaStore.Images.ImageColumns.TITLE, fileName)

        val uri: Uri? = context.contentResolver.insert(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
            values
        )
        uri?.let {
            context.contentResolver.openOutputStream(uri)?.let { stream ->
                val oStream =
                    BufferedOutputStream(stream)
                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, oStream)
                oStream.close()
            }
        }

}

Answer 8

你应该改变这段代码 -

try {
        output = new FileOutputStream(file);

        // Compress into png format image from 0% - 100%
        bitmap1.compress(Bitmap.CompressFormat.JPEG, 100, output);
        output.flush();
        output.close();
        String url = Images.Media.insertImage(getContentResolver(), bitmap1,
        "Wallpaper.jpg", null);
    }

    catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

如何在Android库中保存图像

8 个答案: