Android TXT文件读写
16lz
2021-01-23
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;}} 更多相关文章
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