androiddemo1登录界面数据保存

实现一个第一次登录成功切选择保存后第二次打开默认用户名&＃xff1a;protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);final EditText edit1&＃61;(EditText) findViewById(R.id.editText1);final EditText edit2&＃61;(EditText) findViewById(R.id.editText2);final CheckBox check&＃61;(CheckBox) findViewById(R.id.checkBox1);final SharedPreferences pre&＃61;getSharedPreferences("mypre",MODE_PRIVATE);final Editor editor&＃61;pre.edit();final Button bt&＃61;(Button) findViewById(R.id.button1);String name&＃61;pre.getString("username","");if(name&＃61;&＃61;null){check.setChecked(false);}else{edit1.setText(name);check.setChecked(true);}bt.setOnClickListener(new OnClickListener(){ &＃64;Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubString username&＃61;edit1.getText().toString().trim(); //trim()方法为去掉前后空白String password&＃61;edit2.getText().toString().trim();if("admin".equals(username)&&"123456".equals(password)){ //如果用户名或密码正确切check框为选中状态&＃xff0c;则将用户名信息储存起来if(check.isChecked()){ editor.putString("username",username);editor.commit();}else{editor.remove(username); //不需要储存则删除editor.commit();}}else{Toast.makeText(MainActivity.this,"用户名或密码错误",Toast.LENGTH_LONG).show();}}});