从resource中的raw文件夹中获取文件并读取数据(资源文件只能读不能写)
String res =
"";
try{
InputStream in =
getResources().openRawResource(R.raw.bbi);
//在\Test\res\raw\bbi.txt,
int
length = in.available();
byte
[] buffer =
new
byte[length];
in.read(buffer);
//res = EncodingUtils.getString(buffer, "UTF-8");
//res = EncodingUtils.getString(buffer, "UNICODE");
res = EncodingUtils.getString(buffer,
"BIG5");
//依bbi.txt的编码类型选择合适的编码,如果不调整会乱码
in.close();
}catch(Exception
e){
e.printStackTrace();
}
myTextView.setText(res);//把得到的内容显示在TextView上
二、
从asset中获取文件并读取数据(资源文件只能读不能写)
String fileName =
"yan.txt";
//文件名字
String res="";
try{
InputStream in = getResources().getAssets().open(fileName);
//
\Test\assets\yan.txt这里有这样的文件存在
int
length = in.available();
byte
[] buffer =
new
byte[length];
in.read(buffer);
res = EncodingUtils.getString(buffer,
"UTF-8");
}catch(Exception
e){
e.printStackTrace();
}
三、
从sdcard中去读文件,首先要把文件通过\android-sdk-windows\tools\adb.exe把本地计算机上的文件copy到sdcard上去,adb.exe
push e:/Y.txt /sdcard/,
不可以用adb.exe push e:\Y.txt
\sdcard\
同样:
把仿真器上的文件copy到本地计算机上用:
adb pull ./data/data/com.tt/files/Test.txt e:/
String fileName =
"/sdcard/Y.txt";
//也可以用String fileName
=
"mnt/sdcard/Y.txt";
String res="";
try{
FileInputStream fin =
new
FileInputStream(fileName);
//FileInputStream fin =
openFileInput(fileName);
//用这个就不行了,必须用FileInputStream
int
length = fin.available();
byte
[] buffer =
new
byte[length];
fin.read(buffer);
res = EncodingUtils.getString(buffer,
"UTF-8");
fin.close();
}catch(Exception
e){
e.printStackTrace();
}
myTextView.setText(res);
四、
写文件,
一般写在\data\data\com.test\files\里面,打开DDMS查看file
explorer是可以看到仿真器文件存放目录的结构的
String
fileName =
"TEST.txt";
String message =
"FFFFFFF11111FFFFF"
;
writeFileData(fileName, message);
public
voidwriteFileData(String fileName,String message){
try{
FileOutputStream fout =openFileOutput(fileName,
MODE_PRIVATE);
byte
[] bytes = message.getBytes();
fout.write(bytes);
fout.close();
}
catch(Exception
e){
e.printStackTrace();
}
}
五、
写,
读data/data/目录(相当AP工作目录)上的文件,用openFileOutput
//写文件在./data/data/com.tt/files/下面
public
voidwriteFileData(String fileName,String message){
try{
FileOutputStream fout =openFileOutput(fileName,
MODE_PRIVATE);
byte
[] bytes = message.getBytes();
fout.write(bytes);
fout.close();
}
catch(Exception
e){
e.printStackTrace();
}
}
//-------------------------------------------------------
//读文件在./data/data/com.tt/files/下面
public
String readFileData(String fileName){
String res="";
try{
FileInputStream fin = openFileInput(fileName);
int
length = fin.available();
byte
[] buffer =
new
byte[length];
fin.read(buffer);
res = EncodingUtils.getString(buffer,
"UTF-8");
fin.close();
}
catch(Exception
e){
e.printStackTrace();
}
return
res;
}
六、
写,
读sdcard目录上的文件,要用FileOutputStream,
不能用openFileOutput
//写在/mnt/sdcard/目录下面的文件
public
voidwriteFileSdcard(String fileName,String message){
try{
//FileOutputStream
fout = openFileOutput(fileName, MODE_PRIVATE);
FileOutputStream fout =
newFileOutputStream(fileName);
byte
[] bytes = message.getBytes();
fout.write(bytes);
fout.close();
}
catch(Exception
e){
e.printStackTrace();
}
}
//读在/mnt/sdcard/目录下面的文件
public
String readFileSdcard(String fileName){
String res="";
try{
FileInputStream fin =
new FileInputStream(fileName);
int
length = fin.available();
byte
[] buffer =
new
byte[length];
fin.read(buffer);
res = EncodingUtils.getString(buffer,
"UTF-8");
fin.close();
}
catch(Exception
e){
e.printStackTrace();
}
return
res;
}
注:
openFileOutput是在raw里编译过的,FileOutputStream是任何文件都可以
参考:http://dev.10086.cn/cmdn/wiki/index.php?doc-view-6017.html