android ファイルの読み書き

	private void mWriteFile() {
		
		try {
			FileOutputStream fileOutputStream = openFileOutput("myfile.txt",
					MODE_PRIVATE);
			String writeString = "test";
			fileOutputStream.write(writeString.getBytes());
		} catch (FileNotFoundException e) {
			Toast.makeText(getBaseContext(), "error"+e, Toast.LENGTH_LONG).show();
		} catch (IOException e) {
			Toast.makeText(getBaseContext(), "error"+e, Toast.LENGTH_LONG).show();
		}
	}
	private void mReadFile(){
        try {
            FileInputStream fileInputStream;
            fileInputStream = openFileInput("myfile.txt");
            byte[] readBytes = new byte[fileInputStream.available()];
            fileInputStream.read(readBytes);
            String readString = new String(readBytes);
            Toast.makeText(getBaseContext(), ""+readString, Toast.LENGTH_LONG).show();
        } catch (FileNotFoundException e) {
        } catch (IOException e) {
        }
    }