getCacheDir()和getFilesDir()方法區別.

Activity提供了getCacheDir()和getFilesDir()方法:

getCacheDir()方法用於獲取/data/data//cache目錄

getFilesDir()方法用於獲取/data/data//files目錄

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

將文件寫入SD卡內:

獲取SDCard的狀態：

Environment.getExtemalStorageState()

Environment.MEDIA_MOUNTED手機裝有SDCard,並且可以進行讀寫

獲取SDCard的目錄:Environment.getExtemalStorageDirectory()

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

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

或:File sdCardDir=new File("/sdcard");//獲取SD卡目錄

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

FileOutputStream outStream = new FileOutputStream(saveFile);

outStream.write("文件的讀寫".getBytes());

outStream.close();