在Android中对文件的读写操作

来源：互联网发布：剑三道长脸型数据编辑：程序博客网时间：2024/06/07 01:11
package com.example.filedemo2;import java.io.ByteArrayOutputStream;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import org.w3c.dom.Text;import android.R.integer;import android.app.Activity;import android.content.SharedPreferences.Editor;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {EditText editText;Button button;TextView textView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        editText=(EditText) findViewById(R.id.editText1);        button=(Button) findViewById(R.id.button1);        textView=(TextView) findViewById(R.id.textView1);        button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubWriteFile(editText.getText().toString());//Toast.makeText(MainActivity.this,ReadFile(),Toast.LENGTH_SHORT).show();textView.setText(ReadFile());}});    }    public void WriteFile(String content){    try {FileOutputStream fos=openFileOutput("a.text",MODE_PRIVATE);fos.write(content.getBytes());fos.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}    }    public String ReadFile(){    String content=null;    try {FileInputStream fis=openFileInput("a.text");ByteArrayOutputStream baos=new ByteArrayOutputStream();byte[] buffer=new byte[1024];int len=0;while((len=fis.read(buffer))!=-1){baos.write(buffer,0, len);}content=baos.toString();fis.close();baos.close();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}    return content;    }}
0 0