[Android Pro] Android保存图片到系统图库

http://stormzhang.github.io/android/2014/07/24/android-save-image-to-gallery/

http://blog.csdn.net/xu_fu/article/details/39158747

Adnroid中保存图片的方法可能有如下两种：

public static File saveImage(Bitmap bmp) {
    File appDir = new File(Environment.getExternalStorageDirectory(), "Boohee");
    if (!appDir.exists()) {
        appDir.mkdir();
    }
    String fileName = System.currentTimeMillis() + ".jpg";
    File file = new File(appDir, fileName);
    try {
        FileOutputStream fos = new FileOutputStream(file);
        bmp.compress(CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

• 第二种是调用系统提供的插入图库的方法：

MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "title", "description");

看似上述第二种方法就是我们要用到的方法，但是可惜的调用上述第二种插入图库的方法图片并没有立刻显示在图库中，而我们需要立刻更新系统图库以便让用户可以立刻查看到这张图片。

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));

sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(new File("/sdcard/Boohee/image.jpg"))););

final MediaScannerConnection msc = new MediaScannerConnection(mContext, new MediaScannerConnectionClient() {
    public void onMediaScannerConnected() {
        msc.scanFile("/sdcard/Boohee/image.jpg", "image/jpeg");
    }
    public void onScanCompleted(String path, Uri uri) {
        Log.v(TAG, "scan completed");
        msc.disconnect();
    }
});

• 终极完美解决方案

MediaStore.Images.Media.insertImage(getContentResolver(), "image path", "title", "description");

所以写了一个方法，完整的代码如下：

public static void saveImageToGallery(Context context, Bitmap bmp) { // 首先保存图片 File appDir = new File(Environment.getExternalStorageDirectory(), "Boohee"); if (!appDir.exists()) { appDir.mkdir(); } String fileName = System.currentTimeMillis() + ".jpg"; File file = new File(appDir, fileName); try { FileOutputStream fos = new FileOutputStream(file); bmp.compress(CompressFormat.JPEG, 100, fos); fos.flush(); fos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } // 其次把文件插入到系统图库 try { MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), fileName, null); } catch (FileNotFoundException e) { e.printStackTrace(); } // 最后通知图库更新 context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + path))); }

补充：

今天在看系统截图源码的时候，里面也有保存屏幕截图到系统图库的代码，如下

Context context = params[0].context;
        Bitmap image = params[0].image;
        Resources r = context.getResources();

        try {
            // Create screenshot directory if it doesn't exist
            mScreenshotDir.mkdirs();

            // media provider uses seconds for DATE_MODIFIED and DATE_ADDED, but milliseconds
            // for DATE_TAKEN
            long dateSeconds = mImageTime / 1000;

            // Save the screenshot to the MediaStore
            ContentValues values = new ContentValues();
            ContentResolver resolver = context.getContentResolver();
            values.put(MediaStore.Images.ImageColumns.DATA, mImageFilePath);
            values.put(MediaStore.Images.ImageColumns.TITLE, mImageFileName);
            values.put(MediaStore.Images.ImageColumns.DISPLAY_NAME, mImageFileName);
            values.put(MediaStore.Images.ImageColumns.DATE_TAKEN, mImageTime);
            values.put(MediaStore.Images.ImageColumns.DATE_ADDED, dateSeconds);
            values.put(MediaStore.Images.ImageColumns.DATE_MODIFIED, dateSeconds);
            values.put(MediaStore.Images.ImageColumns.MIME_TYPE, "image/png");
            values.put(MediaStore.Images.ImageColumns.WIDTH, mImageWidth);
            values.put(MediaStore.Images.ImageColumns.HEIGHT, mImageHeight);
            Uri uri = resolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

            OutputStream out = resolver.openOutputStream(uri);
            image.compress(Bitmap.CompressFormat.PNG, 100, out);
            out.flush();
            out.close();

            // update file size in the database
            values.clear();
            values.put(MediaStore.Images.ImageColumns.SIZE, new File(mImageFilePath).length());
            resolver.update(uri, values, null, null);

        } catch (Exception e) {

        }