Android 中的文件存储

来源：互联网发布：rtl8152b linux驱动编辑：程序博客网时间：2024/05/23 21:59
package cn.tttt.android_file;import java.io.BufferedOutputStream;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import android.app.Activity;import android.os.Bundle;import android.util.Log;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        String word = readFromFile();        Log.i("tttt", "word -> " + word);    }    public String readFromFile() {        StringBuffer result = new StringBuffer();        FileInputStream fis = null;        InputStreamReader isr = null;        BufferedReader br = null;        try {            fis = openFileInput("helloworld.txt");            isr = new InputStreamReader(fis);            br = new BufferedReader(isr);            int b;            while((b = br.read()) != -1) {                result.append((char) b);            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            if(br != null) {                try {                    br.close();                    br = null;                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return result.toString();    }    public void writeToFile() {        FileOutputStream fos = null;        BufferedOutputStream bos = null;        String word = "public static void main(String[] args)";        try {            fos = openFileOutput("helloworld.txt", MODE_PRIVATE);            bos = new BufferedOutputStream(fos);            bos.write(word.getBytes());            bos.flush();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            if (bos != null) {                try {                    bos.close();                    bos = null;                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }}
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