android文件保存

主界面 Activity

package com.example.save;

import com.example.util.Service;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Activity009 extends Activity {

	private Button b1;
	private EditText et1;
	private EditText et2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_activity009);
        b1 = (Button) findViewById(R.id.b1);
        et1 = (EditText) findViewById(R.id.et1);
        et2 = (EditText) findViewById(R.id.et2);
        
        b1.setText("保存");
        b1.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				String filename = et1.getText().toString();
				String content = et2.getText().toString();
				Service service = new Service(Activity009.this);
				try {
					service.save(filename, content);
					Toast.makeText(Activity009.this, "保存成功", Toast.LENGTH_SHORT).show();		
				} catch (Exception e) {
					Toast.makeText(Activity009.this, "保存失败", Toast.LENGTH_SHORT).show();		
					e.printStackTrace();
				}
			}
		});
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_activity009, menu);
        return true;
    }
}

 

Util 包中 Service 工具类

package com.example.util;

 import java.io.FileOutputStream;

import android.content.Context;

public class Service {
	private Context context ;
	public Service(Context context){
		this.context = context;
	}
	
	public void save(String filename ,String content) throws Exception{
		FileOutputStream out = context.openFileOutput(filename, context.MODE_PRIVATE);//private模式，对原文件进行覆盖，只有本应用能对该文件进行操作  //Append模式 ，检查文件是否存在，存在追加，不存在创建；只有本应用能对该文件进行操作。//Readable 可被其它文件读取 //writeable 可被其它文件写入
		out.write(content.getBytes());
	}
	
}
		out.write(content.getBytes());
	}
	
}