package com.lidaochen.test;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import java.io.File;import java.io.FileOutputStream;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    // 生成cache目录    public void click1(View v)    {        try        {            File file = new File(getCacheDir(), "info.txt");            FileOutputStream fos = new FileOutputStream(file);            fos.write("Hello World!".getBytes());            fos.close();        }        catch (Exception e)        {            e.printStackTrace();        }    }    // 生成files目录    public void click2(View v)    {        try        {            FileOutputStream fos = openFileOutput("info.txt", 0);            fos.write("Hello Java!".getBytes());            fos.close();        }        catch (Exception e)        {            e.printStackTrace();        }    }}