Android实现记住账号密码功能

本文实例为大家分享了Android实现记住账号密码的具体代码，供大家参考，具体内容如下

布局

一个复选框

代码

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

 private CheckBox checkBox;

 @Override
 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  checkBox = findViewById(R.id.checkbox);
  SharedPreferences sp = getSharedPreferences("items",MODE_PRIVATE);

  
  if( sp.getBoolean("flag",false)==true ){
   getData();
   //模拟点击
   checkBox.performClick();
  }

  //设置checkbox的监听事件
  checkBox.setonCheckedChangeListener(new CompoundButton.onCheckedChangeListener() {
   @Override
   public void onCheckedChanged(CompoundButton compoundButton, boolean isCheck) {

    //若选中，则保存数据，否则，清除数据
    if(isCheck){
     saveData();
     Toast.makeText(MainActivity.this,"已保存",Toast.LENGTH_LONG).show();
    }
    else{
     clearData();
    }
   }
  });
 }
  
 //清除数据
 private void clearData() {
  SharedPreferences sp = getSharedPreferences("items",MODE_PRIVATE);
  SharedPreferences.Editor editor = sp.edit();
  editor.clear();
  editor.commit();
  et1.setText("");
  et2.setText("");
 }
 
 private void getData(){
  SharedPreferences sp = getSharedPreferences("items", Context.MODE_PRIVATE);
  String username = sp.getString("username","");
  String password = sp.getString("password","");
  et1.setText(username);

  //密文设置
  TransformationMethod method = PasswordTransformationMethod.getInstance();
  et2.setText(password);
  et2.setTransformationMethod(method);

 }

 
 public void saveData(){


  SharedPreferences sharedPreferences = getSharedPreferences("items", Context.MODE_PRIVATE);
  SharedPreferences.Editor editor = sharedPreferences.edit();

  String username = et1.getText().toString();
  String password = et2.getText().toString();

  if(!username.equals("") && !password.equals("")) {

   editor.putString("username", username);
   editor.putString("password", password);
   editor.putBoolean("flag", true); //标志位
   editor.commit();
  }

 }
}

测试

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。