登录界面

public class MainActivity extends Activity {private EditText user_name;private EditText user_password;private Button loginButton;private CheckBox save_pass;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);user_name = (EditText)findViewById(R.id.user_name);user_password = (EditText) findViewById(R.id.user_password);loginButton = (Button) findViewById(R.id.login);save_pass = (CheckBox) findViewById(R.id.save_info);Map map = LoginServices.getUserInfo(this);if(map!=null){user_name.setText(map.get("username"));user_password.setText(map.get("userpass"));}loginButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {String name = user_name.getText().toString().trim();String password = user_password.getText().toString().trim();Log.v("flag", name);Log.v("flag", password);if(TextUtils.isEmpty(name)||TextUtils.isEmpty(password)){Toast.makeText(MainActivity.this,"用户名或密码不能为空", Toast.LENGTH_LONG).show();}else{if(save_pass.isChecked()){boolean res = LoginServices.saveInfo(MainActivity.this, name, password);if(res){Toast.makeText(MainActivity.this, "Info saved",Toast.LENGTH_LONG).show();}}if("zhangsan".equals(name)&&"123".equals(password)){Toast.makeText(MainActivity.this, "Login successfully", Toast.LENGTH_LONG).show();}else{Toast.makeText(MainActivity.this,"Login failedly",Toast.LENGTH_LONG).show();}}}});}}

public class  LoginServices {public static boolean saveInfo(Context context, String userName, String userPass){File file = new File(context.getFilesDir(), "info.txt");try {FileOutputStream fos = new FileOutputStream(file);fos.write((userName+"##"+userPass).getBytes());fos.close();return true;} catch (Exception e) {e.printStackTrace();return false;}}public static Map getUserInfo(Context context){File file = new File(context.getFilesDir(), "info.txt");try {BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file)));String str = br.readLine();String[] infos = str.split("##");Map map = new HashMap();map.put("username", infos[0]);map.put("userpass", infos[1]);return map;} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();return null;}}}

Login.rar (986.6 KB)
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