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101 lines
3.8 KiB
101 lines
3.8 KiB
package com.example.mysoft;
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import android.content.Intent;
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import android.database.Cursor;
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import android.database.sqlite.SQLiteDatabase;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.Toast;
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import androidx.appcompat.app.AppCompatActivity;
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import com.example.mysoft.activity.IndexActivity;
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import com.example.mysoft.activity.RegisterActivity;
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import com.example.mysoft.database.Database;
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public class MainActivity extends AppCompatActivity implements View.OnClickListener {
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private Button registerButton, loginButton;
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private EditText usernameText, paswdEdit;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.user_login);
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init();
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}
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private void init() {
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usernameText = findViewById(R.id.username);
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paswdEdit = findViewById(R.id.password);
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loginButton = findViewById(R.id.login);
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loginButton.setOnClickListener(this);
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registerButton = findViewById(R.id.register);
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registerButton.setOnClickListener(this);
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}
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@Override
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public void onClick(View v) {
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switch (v.getId()) {
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case R.id.register:
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Intent intent = new Intent(MainActivity.this, RegisterActivity.class);
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startActivity(intent);
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break;
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case R.id.login:
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//注册时，我们引入了数据库，登录这里可以通过数据库进行验证，验证跳转到首页，不通过进行提示
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if (validateLogin()) {
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Intent intent1 = new Intent(MainActivity.this, IndexActivity.class);
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Bundle bundle = new Bundle();
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Database userDatabase = new Database(MainActivity.this);
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bundle.putString("username", usernameText.getText().toString());
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bundle = userDatabase.queryUserInfo(userDatabase.getReadableDatabase(), bundle);
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intent1.putExtras(bundle);
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startActivity(intent1);
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} else {
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Toast.makeText(MainActivity.this, "账号或者密码错误", Toast.LENGTH_SHORT).show();
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}
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break;
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}
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}
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/**
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* 登录验证
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*
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* @return
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*/
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private boolean validateLogin() {
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String username = usernameText.getText().toString();
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String password = paswdEdit.getText().toString();
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Database userDatabase = new Database(MainActivity.this);
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SQLiteDatabase sqLiteDatabase = userDatabase.getReadableDatabase();
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Cursor cursor = sqLiteDatabase.rawQuery("select * from mysoft_user where username=? and password=?", new String[]{username, password});
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if (cursor.getCount() > 0) {
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return true;
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}
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return false;
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}
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}
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// //对话框的使用
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// Button button=(Button)findViewById(R.id.fpassword);
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// button.setOnClickListener(new View.OnClickListener(){
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// @Override
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// public void onClick(View view){
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// new AlertDialog.Builder(MainActivity.this).setTitle("系统提示")
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// .setMessage("忘记密码!")
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// .setPositiveButton("确定", new DialogInterface.OnClickListener() {
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// @Override
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// public void onClick(DialogInterface dialog, int which) {
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// finish();
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// }
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// }).setNegativeButton("返回", new DialogInterface.OnClickListener() {
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// @Override
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// public void onClick(DialogInterface dialog, int which) {
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//
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// }
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// }).show();
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// }
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// });
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