diff --git a/StudentLogin.java b/StudentLogin.java new file mode 100644 index 0000000..446a866 --- /dev/null +++ b/StudentLogin.java @@ -0,0 +1,226 @@ +package com.example; + +import androidx.appcompat.app.AppCompatActivity; + +import android.app.AlertDialog; +import android.content.Context; +import android.content.Intent; +import android.os.Bundle; +import android.os.Handler; +import android.os.Looper; +import android.os.Message; +import android.text.TextUtils; +import android.util.Log; +import android.view.View; +import android.widget.Button; +import android.widget.EditText; +import android.widget.Toast; + +import com.example.activity.TestSettingActivity; + +import java.io.IOException; + +import okhttp3.Call; +import okhttp3.FormBody; +import okhttp3.OkHttpClient; +import okhttp3.Request; +import okhttp3.RequestBody; +import okhttp3.Response; + +public class StudentLogin extends AppCompatActivity { + Button login,register; + EditText sno,password; + + public static final int MSG_LOGIN_ERR = 1; //登录错误 + public static final int MSG_CONNET_ERR = 2; //网络链接错误 + private Context context; + + private LoginHandler login_handler; + @Override + protected void onCreate(Bundle savedInstanceState) { + + super.onCreate(savedInstanceState); + setContentView(R.layout.login_student); + context = this; + InitView(); + login_handler = new LoginHandler(); + Init(); + /*super.onCreate(savedInstanceState); + setContentView(R.layout.login_student); + login = (Button) findViewById(R.id.login_button); + register = (Button) findViewById(R.id.reg_button); + sno = (EditText) findViewById(R.id.username); + password = (EditText) findViewById(R.id.password); + login.setOnClickListener(this); + register.setOnClickListener(this); +*/ + } + private void InitView() + { + sno = (EditText)findViewById(R.id.username); + password = (EditText)findViewById(R.id.password); + login = (Button)findViewById(R.id.login_button); + register = (Button) findViewById(R.id.reg_button); + } + private void Init() { + + //设置提示的颜色 + sno.setHintTextColor(getResources().getColor(R.color.white)); + password.setHintTextColor(getResources().getColor(R.color.white)); + + + //登录 + login.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + if (judge()) { + login.setEnabled(false);//点了登录后不可以再点，避免用户乱点 + loginInfo(); + } + } + }); + + //注册 + register.setOnClickListener(new View.OnClickListener() { + @Override + public void onClick(View view) { + Toast.makeText(context, "注册", Toast.LENGTH_SHORT).show(); + startActivity(new Intent(StudentLogin.this, StudentRegister.class)); + } + }); + + + } + private void loginInfo() { + String userId = sno.getText().toString(); + String userPassword = password.getText().toString(); + //get 请求 + String login_check_url = "http://169.254.115.53:8080/shixun/Login"; + RequestBody requestBody = new FormBody.Builder() + .add( "username",userId) + .add("password",userPassword) + .build(); + + okhttp3.Callback callback = new okhttp3.Callback() + { + @Override + public void onResponse(Call call, Response response) throws IOException { + String responseData = response.body().string(); + Log.e("LoginActivity","onResponse"); + Log.e("LoginActivity",responseData); + if(responseData.equals("success")) { + Looper.prepare(); + Toast.makeText(context, "恭喜您登录成功",Toast.LENGTH_SHORT).show(); + //startActivity(new Intent(StudentLogin.this, TestSettingActivity.class)); + //finish(); + Looper.loop(); + } + else { + Message msg = new Message(); + msg.what = MSG_LOGIN_ERR; + login_handler.sendMessage(msg); + } + } + @Override + public void onFailure(Call call, IOException e) { + String responseData = "Error!"; + Log.e("LoginActivity","Failure"); + Log.e("LoginActivity",responseData); + Message msg = new Message(); + msg.what = MSG_CONNET_ERR; + login_handler.sendMessage(msg); + } + }; + OkHttpClient client = new OkHttpClient(); + + Request request = new Request.Builder() + .url(login_check_url) + .post(requestBody) + .build(); + //发送请求 + client.newCall(request).enqueue(callback); + } + + //判断登录信息是否合法 + private boolean judge() { + if (TextUtils.isEmpty(sno.getText().toString()) ) { + Toast.makeText(context, "用户名不能为空",Toast.LENGTH_SHORT).show(); + return false; + } else if (TextUtils.isEmpty(password.getText().toString())) { + Toast.makeText(context, "密码不能为空",Toast.LENGTH_SHORT).show(); + return false; + } + return true; + } + + /** + 3 * 事件捕获 + 4 */ + class LoginHandler extends Handler { + @Override + public void dispatchMessage(Message msg) { + super.dispatchMessage(msg); + switch (msg.what) { + case MSG_LOGIN_ERR: + sno.setText(""); + password.setText(""); + sno.requestFocus(); + new AlertDialog.Builder(StudentLogin.this) + .setTitle("注意") + .setMessage("用户名或密码输入不正确，请重新输入") + .setPositiveButton("确定",null) + .create() + .show(); + login.setEnabled(true); + break; + case MSG_CONNET_ERR: + new AlertDialog.Builder(StudentLogin.this) + .setTitle("注意") + .setMessage("网络连接错误，请检查网络") + .setPositiveButton("确定",null) + .create() + .show(); + break; + } + } + + } +/* + @Override + public void onClick(View view) { + switch (view.getId()){ + case R.id.reg_button: + Intent intent = new Intent(StudentLogin.this,StudentRegister.class); + startActivity(intent); + break; + case R.id.login_button: + new Thread(){ + @Override + public void run() { + LoginDao userDao = new LoginDao(); + int msg = userDao.login(sno.getText().toString(),password.getText().toString()); + hand1.sendEmptyMessage(msg); + } + }.start(); + + break; + default: + } + } + + @SuppressLint("HandlerLeak") + final Handler hand1 = new Handler() { + @Override + public void handleMessage(Message msg) { + if (msg.what == 0){ + Toast.makeText(getApplicationContext(), "登录失败", Toast.LENGTH_LONG).show(); + } else if (msg.what == 1) { + Toast.makeText(getApplicationContext(), "登录成功", Toast.LENGTH_LONG).show(); + } else if (msg.what == 2){ + Toast.makeText(getApplicationContext(), "密码错误", Toast.LENGTH_LONG).show(); + } else if (msg.what == 3){ + Toast.makeText(getApplicationContext(), "账号不存在", Toast.LENGTH_LONG).show(); + } + } + };*/ +} \ No newline at end of file