第一種：採用系統的api直接使用：

ContentResolver cr = getContentResolver();String url = MediaStore.Images.Media.insertImage(cr, bmp,String.valueOf(System.currentTimeMillis()), "");
可是，這樣的方式必須得刷新圖庫：

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));
雖然如此，這樣的方法還是僅僅能適合安卓4.4下面的手機，若是4.4以上的手機就會報錯。因此建議採用另外一種方式來寫。

另外一種：直接採用文件流進行保存到相冊

File tempFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath() + "/"+ String.valueOf(System.currentTimeMillis()) + ".png");if(tempFile.exists()){tempFile.delete();}try {tempFile.createNewFile();} catch (IOException e) {e.printStackTrace();}FileOutputStream fOut = null;try {fOut = new FileOutputStream(tempFile);} catch (FileNotFoundException e) {e.printStackTrace();}bmp.compress(Bitmap.CompressFormat.PNG, 100, fOut);try {fOut.flush();fOut.close();} catch (IOException e) {// TODO: handle exceptione.printStackTrace();}

最后把整個方法貼出來：

/*** 將ImageView中的圖片保存到系統相冊*/private void SaveImageToSysAlbum() {if (FileUtil.isSdCardExist()) {BitmapDrawable bmpDrawable = (BitmapDrawable)mFullImageView.getDrawable();Bitmap bmp = bmpDrawable.getBitmap();if (bmp != null) {try {/*ContentResolver cr = getContentResolver();String url = MediaStore.Images.Media.insertImage(cr, bmp,String.valueOf(System.currentTimeMillis()), "");*/File tempFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath() + "/"+ String.valueOf(System.currentTimeMillis()) + ".png");if(tempFile.exists()){tempFile.delete();}try {tempFile.createNewFile();} catch (IOException e) {e.printStackTrace();}FileOutputStream fOut = null;try {fOut = new FileOutputStream(tempFile);} catch (FileNotFoundException e) {e.printStackTrace();}bmp.compress(Bitmap.CompressFormat.PNG, 100, fOut);try {fOut.flush();fOut.close();} catch (IOException e) {// TODO: handle exceptione.printStackTrace();}Toast.makeText(this, getString(R.string.save_succ), Toast.LENGTH_SHORT).show();} catch (Exception e) {e.printStackTrace();}}else {Toast.makeText(this, getString(R.string.no_iamge_save_fail), Toast.LENGTH_SHORT).show();}}else {Toast.makeText(this, getString(R.string.no_sdcard_save_fail), Toast.LENGTH_SHORT).show();}String release = android.os.Build.VERSION.RELEASE;String tempID = release.substring(0, 3);if(Double.parseDouble(tempID) >= 4.4){//安卓4.4以上版本號的時候使用這個。下面的使用else語句里面的MediaScannerConnection.scanFile(this,new String[]{Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath() + "/" }, null,null);}else {sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));MediaScannerConnection.scanFile(this,new String[]{Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getPath() + "/" }, null,null); }}

總結

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