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829天前String Filename="test.txt" |
1.保存数据 |
//Context.MODE_PRIVATE表示只有本应用才能访问数据 |
FileOutputStream outputStream = openFileOutput(FileName, Context.MODE_PRIVATE); |
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream,"UTF-8")); |
writer.write("测试数据"); |
//必须调用flush()和close()方法,不然根本没数据 |
writer.flush(); |
outputStream.flush(); |
writer.close(); |
outputStream.close(); |
2.读取数据 |
FileInputStream inputStream=openFileInput(FileName); |
BufferedReader reader=new BufferedReader(new InputStreamReader(inputStream)); |
StringBuilder sBuilder = new StringBuilder(); |
String line = ""; |
while ((line = reader.readLine()) != null) { |
sBuilder.append(line); |
} |
textView.setText(sBuilder.toString()); |
reader.close(); |
inputStream.close(); |
by: 发表于：2017-09-26 11:43:51 顶(0) | 踩(0) 回复
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