安卓文件存储

保存路径 应用程序的包名下的file

// 保存数据    public void saveData(String saveStr,String saveFileName) {// 判断SD卡是否可用        if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())){            // TODO        }        FileOutputStream fos = null;        BufferedWriter bw = null;        try {            /**             * 打开文件输出流 需要上下文             * @param name 存储文件的名称             * @param int 保存类型             */            fos = openFileOutput(saveFileName, Context.MODE_PRIVATE);            // 创建缓冲写入器 BufferedWriter会自动刷新缓冲区            bw = new BufferedWriter(new OutputStreamWriter(fos));            bw.write(saveStr);        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            if (bw != null) {                try {                    // 关闭缓冲写入器                    bw.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }    // 读取数据    public String readData(String saveFileName) {        FileInputStream fis = null;        BufferedReader br = null;        StringBuilder sb = new StringBuilder();        try {            // 打开文件输入流            fis = openFileInput(saveFileName);            // 创建缓冲读取器            br = new BufferedReader(new InputStreamReader(fis));            String line = null;            while ((line=br.readLine())!=null){                // 每次读取一行并将其拼接起来                sb.append(line);            }        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            if(br!=null){                try {                    // 关闭缓冲读取器                    br.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return sb.toString();    }

public void myClick(View view) {        // 获取sd卡数据大小        File file = Environment.getExternalStorageDirectory();        long totalSpace = file.getTotalSpace();        long usableSpace = file.getUsableSpace();        // import android.text.format.Formatter;        String s = Formatter.formatFileSize(this, totalSpace);        String s1 = Formatter.formatFileSize(this, usableSpace);        Log.e("总大小", "=" + s);        Log.e("可用空间", "=" + s1);    }