Android(安卓)文件读写的例子

 1 import java.io.FileInputStream;  2 import java.io.FileNotFoundException;  3 import java.io.FileOutputStream;  4 import java.io.IOException;  5 import org.apache.http.util.EncodingUtils;  6  7 public class MyLogFile {  8       private static FileOutputStream fout;  9       public MyLogFile() { 10       } 11 12       public static void createFile(){13            try {14                 fout = new FileOutputStream("/mnt/sdcard/zyrPad.txt");15                 // fout = openFileOutput("/mnt/sdcard/zyrPad.txt",Mode);16           } catch (FileNotFoundException e) {17                 e.printStackTrace(); 18           } 19      } 20 21      //写在/mnt/sdcard/目录下面的文件 22      public static void writeFileSdcard(String message){ 23            try{ 24                  //FileOutputStream fout = openFileOutput(fileName, MODE_PRIVATE);25                 message= message+"\n";26                 byte [] bytes = message.getBytes(); 27                 fout.write(bytes); 28            } catch(Exception e){29                 e.printStackTrace();30            }31       }32 33       //读在/mnt/sdcard/目录下面的文件 34       public String readFileSdcard(String fileName){35             String res="";36             try{ 37                   FileInputStream fin = new FileInputStream(fileName);38                   int length = fin.available(); 39                   byte [] buffer = new byte[length]; 40                   fin.read(buffer); 41                   res = EncodingUtils.getString(buffer, "UTF-8"); 42                   fin.close();43             } catch(Exception e){ 44                   e.printStackTrace();45             }46             return res; 47       } 48 49       /** * 关闭文件流 */ 50       public static void closeFile(){51             try {52                  fout.close(); 53             } catch (IOException e) {54                  e.printStackTrace(); 55             }56       } 57 }

调用的时候很简单：
MyLogFile.createFile();//创建文件
MyLogFile.writeFileSdcard("------------写文字到文件中----------------");

使用完后，记得关闭：
MyLogFile.closeFile()

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