android文件保存到sd卡和内存

1.保存到SD卡中：

获取SDCard的状态：

Environment.getExtemalStorageState()

Environment.MEDIA_MOUNTED手机装有SDCard,并且可以进行读写

获取SDCard的目录:Environment.getExtemalStorageDirectory()

//=============================================

File saveFile=new File("/sdcard/zhzhg.txt");

或:File sdCardDir=new File("/sdcard");//获取SD卡目录

File saveFile = new File(sdCardDir,"zhzhg.txt");

FileOutputStream outStream = new FileOutputStream(saveFile);

outStream.write("文件的读写".getBytes());

outStream.close();

2.保存到内存中：

getCacheDir()方法用于获取/data/data//cache目录

getFilesDir()方法用于获取/data/data//files目录

 

File file = new File(MyApplication.getInstance().getFilesDir()+"/"+path);

                      out = new PrintWriter(new BufferedWriter(new FileWriter(file, true)));

                     out.println(str);//在指定文件中加入内容

                     out.flush();