Android—将Bitmap图片保存到SD卡目录下或者指定目录

   //直接上代码就不废话啦   //一：保存到SD卡下   //[java] view plain copy  File file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis()+".jpg");  try {  out = new FileOutputStream(file);  btImage.compress(Bitmap.CompressFormat.JPEG, 90, out);  System.out.println("___________保存的__sd___下_______________________");  } catch (FileNotFoundException e) {  e.printStackTrace();  }  try {  out.flush();  out.close();  } catch (IOException e) {  e.printStackTrace();  }  Toast.makeText(HahItemActivity.this,"保存已经至"+Environment.getExternalStorageDirectory()+"下", Toast.LENGTH_SHORT).show();   }
  //上面的方法就是 直接定义一个文件的路径，和图片的名称，然后保存.  //二：保存Bitmap到指定的SD卡文件夹目录下  //想想也知道，这个必须先有个文件夹，才能把图片保存这里面，那就按照思路学代码吧  //[java] view plain copy  if (Environment.getExternalStorageState().equals( Environment.MEDIA_MOUNTED)) // 判断是否可以对SDcard进行操作    {    // 获取SDCard指定目录下    String  sdCardDir = Environment.getExternalStorageDirectory()+ "/CoolImage/";  File dirFile  = new File(sdCardDir);  //目录转化成文件夹    if (!dirFile .exists()) {              //如果不存在，那就建立这个文件夹    dirFile .mkdirs();  }                          //文件夹有啦，就可以保存图片啦                File file = new File(sdCardDir, System.currentTimeMillis()+".jpg");// 在SDcard的目录下创建图片文,以当前时间为其命名    try {  out = new FileOutputStream(file);  btImage.compress(Bitmap.CompressFormat.JPEG, 90, out);  System.out.println("_________保存到____sd______指定目录文件夹下____________________");  } catch (FileNotFoundException e) {  e.printStackTrace();  }  try {  out.flush();  out.close();  } catch (IOException e) {  e.printStackTrace();  }  Toast.makeText(HahItemActivity.this,"保存已经至"+Environment.getExternalStorageDirectory()+"/CoolImage/"+"目录文件夹下", Toast.LENGTH_SHORT).show();  }
  //注：访问权限注意哦  //[java] view plain copy  //<!-- 安卓读写sd权限 -->  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
 
  
    //关于图片的  SD卡的    //未完   待续    //    //[java] view plain copy    //将Bitmap图片保存到sd卡      protected void saveBitmapToSD(Bitmap bt) {        File path = Environment.getExternalStorageDirectory();        File file = new File(path, System.currentTimeMillis() + ".jpg");        System.out.println(Environment.getExternalStorageState() + "/Cool/" +"000000000000000000000000000");        try {        FileOutputStream out = new FileOutputStream(file);        bt.compress(Bitmap.CompressFormat.JPEG, 90, out);        } catch (FileNotFoundException e) {        e.printStackTrace();        }        out.flush();        out.close();        }    
  /**   * 保存bitmap到SD卡    * @param bitName 保存的名字    * @param mBitmap 图片对像    * return 生成压缩图片后的图片路径    */  public static String saveMyBitmap(String bitName,Bitmap mBitmap) {        File f = new File("/sdcard/" + bitName + ".png");        try {        f.createNewFile();        } catch (IOException e) {        System.out.println("在保存图片时出错：" + e.toString());        }        FileOutputStream fOut = null;        try {        fOut = new FileOutputStream(f);        } catch (FileNotFoundException e) {        e.printStackTrace();        }        try {        mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut);        } catch (Exception e) {        return "create_bitmap_error";        }        try {        fOut.flush();        } catch (IOException e) {        e.printStackTrace();        }        try {        fOut.close();        } catch (IOException e) {        e.printStackTrace();        }        return "/sdcard/" + bitName + ".png";        } /**  * 保存bitmap到SD卡   * @param bitmap  * @param imagename  */   public static String saveBitmapToSDCard(Bitmap bitmap, String imagename) {        String path = "/sdcard/" + "img-" + imagename + ".jpg";        FileOutputStream fos = null;        try {        fos = new FileOutputStream(path);        if (fos != null) {        bitmap.compress(Bitmap.CompressFormat.JPEG, 90, fos);        fos.close();        }        return path;        } catch (Exception e) {        e.printStackTrace();        }        return null;        }   
 
     
    转载：http://blog.csdn.net/gjy211/article/details/50868519