第一种自己写一个方法:
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(); } }以上代码便是将Bitmap保存图片到指定的路径/sdcard/Boohee/下,文件名以当前系统时间命名,但是这种方法保存的图片没有加入到系统图库中
MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "title", "description");调用以上系统自带的方法会把bitmap对象保存到系统图库中,但是这种方法无法指定保存的路径和名称,上述方法的title、description参数只是插入数据库中的字段,真实的图片名称系统会自动分配。
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(new File("/sdcard/Boohee/image.jpg"))););或者:
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(); } });完整的保存图片到指定路径和系统库的代码
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))); }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) { }