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;
}
} 然後建立檔案夾-->
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())){
// 建立一個檔案夾對象，指派為外部存儲器的目錄
File sdcardDir =Environment.getExternalStorageDirectory();
//得到一個路徑，内容是sdcard的檔案夾路徑和名字
newPath=sdcardDir.getPath()+"/***app/tempImages/";//newPath在程式中要聲明
File path1 = new File(newPath);
if (!path1.exists()) {
//若不存在，建立目錄，可以在應用啟動的時候建立
path1.mkdirs();
System.out.println("paht ok,path:"+newPath);
}
}
else{
System.out.println("false");
}
}
} 建立好檔案夾之後就可以儲存圖檔了-->
public void saveMyBitmap(String bitName,int percent) throws IOException {
Bitmap bmp = drawable2Bitmap(picView.getDrawable());//這裡的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建立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;
}