Android將圖片保存至SD卡上

首先判斷SD卡是否插入-->

public String getSDPath(){
            File SDdir=null;
            boolean sdCardExist=
Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
            if(sdCardExist){
                    SDdir=Environment.getExternalStorageDirectory();
            }
            if(SDdir!=null){
                    return SDdir.toString();
            }
            else{
                    return null;
            }
    }
 

public void createSDCardDir(){
            if(getSDPath()==null){
                    Toast.makeText(PicSharesActivity.this, "未找到SD卡", 1000).show();
            }else{
                        if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())){
                            // 創建一個文件夾對象，賦值為外部存儲器的目錄
                             File sdcardDir =Environment.getExternalStorageDirectory();
                           //得到一個路徑，內容是sdcard的文件夾路徑和名字
                             newPath=sdcardDir.getPath()+"/***app/tempImages/";//newPath在程序中要聲明
                             File path1 = new File(newPath);
                            if (!path1.exists()) {
                             //若不存在，創建目錄，可以在應用啟動的時候創建
                             path1.mkdirs();
                             System.out.println("paht ok,path:"+newPath);
                           }
                     }
                     else{
                      System.out.println("false");
                    }
            }
        }

public void saveMyBitmap(String bitName,int percent) throws IOException {


            Bitmap bmp = drawable2Bitmap(picView.getDrawable());//這里的drawable2Bitmap方法是我把ImageView中 的drawable轉化成bitmap，當然實驗的時候可以自己創建bitmap
        File f = new File(newPath + bitName + ".jpg");
        f.createNewFile();
        FileOutputStream fOut = null;
        try {
                fOut = new FileOutputStream(f);        
                } catch (FileNotFoundException e) {        
                e.printStackTrace();
        }
        bmp.compress(Bitmap.CompressFormat.JPEG, percent, fOut);
        try {
                fOut.flush();
        } catch (IOException e) {
                e.printStackTrace();
        }
        try {
                fOut.close();
        } catch (IOException e) {
                e.printStackTrace();
        }
}

//附加drawable2Bitmap方法
static Bitmap drawable2Bitmap(Drawable d){
            int width=d.getIntrinsicWidth();
            int height=d.getIntrinsicHeight();
            Bitmap.Config config=d.getOpacity()!=PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888: Bitmap.Config.RGB_565;
            Bitmap bitmap=Bitmap.createBitmap(width,height,config);
            Canvas canvas=new Canvas(bitmap);
            d.setBounds(0, 0, width, height);
            d.draw(canvas);
            return bitmap;
    }
 </pre>