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  • Android TXT文件读写 分类: Android 2015-07-27 16:23 13人阅读 评论(0) 收藏

    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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  • 原文地址:https://www.cnblogs.com/xieping/p/4714169.html
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