安卓开发之“LitePal”

如何用安卓LitePal做一个小型的登录注册

本文章摘取郭神的《第一行代码》中的LitPal,做的一个小小的登录注册demo,内容仅供初学者参考！！

• 登录块

• “`
  public class MainActivity extends AppCompatActivity implements View.OnClickListener{

  private EditText edit_query1, edit_query2;
  private Button button;
  private TextView textView2;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  edit_query1 = (EditText) findViewById(R.id.edit_query1);
  edit_query2 = (EditText) findViewById(R.id.edit_query2);

  button = (Button) findViewById(R.id.button);
  textView2 = (TextView) findViewById(R.id.textView2);
  
  button.setOnClickListener(this);
  textView2.setOnClickListener(this);
  

  }

  @Override
  public void onClick(View view) {

  switch (view.getId()){
      case R.id.textView2:
          Intent in = new Intent(MainActivity.this, Register.class);
          startActivity(in);
          break;
      case R.id.button:
          boolean falg=false;
          List<User> persons = DataSupport.findAll(User.class);
  
          for(User ps:persons){
              if(edit_query1.getText().toString().trim().equals(ps.getName())
                      &&(edit_query2.getText().toString().trim().equals(ps.getPassword()))){
                  falg=true;
              }
  
          }
          if(falg){
              Intent intent=new Intent(MainActivity.this,MasterInformationActivity.class);
              startActivity(intent);
          }else {
              Toast.makeText(MainActivity.this, "失败", Toast.LENGTH_SHORT).show();
          }
          break;
  }
  

  }
  }

• 注册块

• “`
  public class Register extends AppCompatActivity implements View.OnClickListener{

  private EditText edit_query,edit_query2,edit_query3,edit_query4;

  private Button button2,saf;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.register);
  edit_query = (EditText) findViewById(R.id.edit_query);
  edit_query2 = (EditText) findViewById(R.id.edit_query5);
  edit_query3 = (EditText) findViewById(R.id.edit_query4);
  edit_query4 = (EditText) findViewById(R.id.edit_query3);
  button2 = (Button) findViewById(R.id.button2);
  button2.setOnClickListener(this);
  }

  @Override
  public void onClick(View view) {
  User ps;
  ps=new User();
  String strname=edit_query.getText().toString();
  String strpassword=edit_query2.getText().toString();
  // String strsex=edit_query3.getText().toString();
  // String serbanji=edit_query4.getText().toString();
  ps.setName(strname);
  ps.setPassword(strpassword);
  // ps.setSex(strsex);
  ps.save();
  Log.d(“TAG”,”name”+ps.getName());
  Log.d(“TAG”,”password”+ps.getPassword());
  Log.d(“TAG”,”SEX”+ps.getSex());

  if(edit_query.getText().toString().trim().equals("")
          &&edit_query2.getText().toString().trim().equals("")){
      Toast.makeText(Register.this, "失败", Toast.LENGTH_SHORT).show();
  }else {
      Intent in = new Intent(Register.this, MainActivity.class);
      startActivity(in);
  }
  

  }
  }

具体配置请看郭神博客http://my.csdn.net/sinyu890807