Android TXT文件读写
- package com.wirelessqa.helper;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.io.InputStream;
- import org.apache.http.util.EncodingUtils;
- import android.app.Activity;
- public class FileAccess extends Activity {
- /**
- * 一、私有文件夹下的文件存取(/data/data/包名/files)
- *
- * @param fileName
- * @param message
- */
- public void writeFileData(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/包名/files/下面
- *
- * @param fileName
- * @return
- */
- 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;
- }
- /**
- * 写, 读sdcard目录上的文件,要用FileOutputStream, 不能用openFileOutput
- * 不同点:openFileOutput是在raw里编译过的,FileOutputStream是任何文件都可以
- * @param fileName
- * @param message
- */
- // 写在/mnt/sdcard/目录下面的文件
- public void writeFileSdcard(String fileName, String message) {
- try {
- // FileOutputStream fout = openFileOutput(fileName, MODE_PRIVATE);
- FileOutputStream fout = new FileOutputStream(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;
- }
- /**
- * 二、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)
- *
- * @param fileInRaw
- * @return
- */
- public String readFromRaw(int fileInRaw) {
- String res = "";
- try {
- InputStream in = getResources().openRawResource(fileInRaw);
- int length = in.available();
- byte[] buffer = new byte[length];
- in.read(buffer);
- res = EncodingUtils.getString(buffer, "GBK");
- // res = new String(buffer,"GBK");
- in.close();
- } catch (Exception e) {
- e.printStackTrace();
- }
- return res;
- }
- /**
- * 三、从asset中获取文件并读取数据(资源文件只能读不能写)
- *
- * @param fileName
- * @return
- */
- public String readFromAsset(String fileName) {
- String res = "";
- try {
- InputStream in = getResources().getAssets().open(fileName);
- int length = in.available();
- byte[] buffer = new byte[length];
- in.read(buffer);
- res = EncodingUtils.getString(buffer, "UTF-8");
- } catch (Exception e) {
- e.printStackTrace();
- }
- return res;
- }
- }
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