Android 文件读取操作

01	//第一个button的事件读取

02	btn01.setOnClickListener(new Button.OnClickListener() {

03

04

@Override

05	public void onClick(View v) {

06	FileInputStream myFileStream = null;

07	InputStreamReader myReader = null;

08

09	char[] inputBuffer = new char[255];

10	String data = null;

11

12

try{

13

//得到文件流对象

14	myFileStream = openFileInput("my.txt");

15

//得到读取器对象

16	myReader = new InputStreamReader(myFileStream);

17

//开始读取

18	myReader.read(inputBuffer);

19	data = new String(inputBuffer);

20	Toast.makeText(MyManagerFile.this, "读取文件成功",Toast.LENGTH_SHORT).show();

21

}

22	catch (Exception e) {

23	e.printStackTrace();

24	Toast.makeText(MyManagerFile.this, "读取文件失败",Toast.LENGTH_SHORT).show();

25

}

26

finally {

27

try {

28	myReader.close();

29	myFileStream.close();

30	} catch (IOException e) {

31	e.printStackTrace();

32

}

33

}

34

35	//显示文件内容在txtView

36	txtView.setText("读取到的内容是:"+data);

37

38

39

40

}

41

});

42

43

44

45	//第二个button的事件写入

46	btn02.setOnClickListener(new Button.OnClickListener() {

47

48

@Override

49	public void onClick(View v) {

50

51	//要写放的数据从文本框得到

52	String data=((EditText)findViewById(R.id.EditText01)).getText().toString();

53

//文件流

54	FileOutputStream myFileStream = null;

55

//写对象

56	OutputStreamWriter myWriter = null;

57

58

try{

59	//从得到文件流对象

60	myFileStream = openFileOutput("my.txt",MODE_PRIVATE);

61

//得到写入器对象

62	myWriter = new OutputStreamWriter(myFileStream);

63

//开始写入

64	myWriter.write(data);

65	myWriter.flush();

66	Toast.makeText(MyManagerFile.this, "写入文件成功",Toast.LENGTH_SHORT).show();

67

}

68	catch (Exception e)

69

{

70	e.printStackTrace();

71	Toast.makeText(MyManagerFile.this, "写入文件失败",Toast.LENGTH_SHORT).show();

72

}

73

finally

74

{

75

try {

76	myWriter.close();

77	myFileStream.close();

78

}

79	catch (IOException e)

80

{

81	e.printStackTrace();

82

}

83

}

84

85	//显示文件内容在txtView

86	txtView.setText("刚刚写入的内容是:"+data);

87

88

89

}

90

});

?文件保到那里去了，这里