public class MainActivity extends AppCompatActivity { private BufferedReader sb; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button btn_main_write= (Button) findViewById(R.id.btn_main_write); Button btn_main_read = (Button) findViewById(R.id.btn_main_read); btn_main_write.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { saveToSDCard("/bawei.txt","万新就业,高新就业"); } catch (Exception e) { e.printStackTrace(); } } }); btn_main_read.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String s = readsf(); Toast.makeText(MainActivity.this,"============"+s,Toast.LENGTH_SHORT).show(); } }); } public void saveToSDCard(String filename,String content) throws Exception{ File file=new File(Environment.getExternalStorageDirectory()+filename); FileWriter out= new FileWriter(file); out.write(content); Toast.makeText(MainActivity.this,"写入成功",Toast.LENGTH_SHORT).show(); out.close(); } private String readsf(){ File file=new File(Environment.getExternalStorageDirectory(),"/bawei.txt"); try { FileReader inputStream= new FileReader(file); sb = new BufferedReader(inputStream); return sb.readLine(); } catch (Exception e) { e.printStackTrace(); } return null; } }
sd卡写入读取
最新推荐文章于 2025-05-03 14:17:09 发布