parent
62e4decf4c
commit
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package com.example;
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import androidx.appcompat.app.AppCompatActivity;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Looper;
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import android.os.Message;
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import android.text.TextUtils;
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import android.util.Log;
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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 com.example.activity.TestSettingActivity;
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import java.io.IOException;
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import okhttp3.Call;
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import okhttp3.FormBody;
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import okhttp3.OkHttpClient;
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import okhttp3.Request;
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import okhttp3.RequestBody;
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import okhttp3.Response;
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public class TeacherLogin extends AppCompatActivity {
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Button login,register;
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EditText tno,tpassword;
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public static final int MSG_LOGIN_ERR = 1; //登录错误
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public static final int MSG_CONNET_ERR = 2; //网络链接错误
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private Context context;
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private LoginHandler login_handler;
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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.login_teacher);
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context = this;
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InitView();
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login_handler = new LoginHandler();
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Init();
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/*super.onCreate(savedInstanceState);
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setContentView(R.layout.login_student);
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login = (Button) findViewById(R.id.login_button);
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register = (Button) findViewById(R.id.reg_button);
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sno = (EditText) findViewById(R.id.username);
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password = (EditText) findViewById(R.id.password);
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login.setOnClickListener(this);
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register.setOnClickListener(this);
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*/
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}
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private void InitView()
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{
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tno = (EditText)findViewById(R.id.teacher_id);
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tpassword = (EditText)findViewById(R.id.teacher_password);
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login = (Button)findViewById(R.id.tlogin_button);
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register = (Button) findViewById(R.id.treg_button);
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}
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private void Init() {
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//设置提示的颜色
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tno.setHintTextColor(getResources().getColor(R.color.white));
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tpassword.setHintTextColor(getResources().getColor(R.color.white));
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//登录
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login.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View view) {
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if (judge()) {
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login.setEnabled(false);//点了登录后不可以再点，避免用户乱点
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tloginInfo();
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}
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}
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});
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//注册
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register.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View view) {
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Toast.makeText(context, "注册", Toast.LENGTH_SHORT).show();
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startActivity(new Intent(TeacherLogin.this, TeacherRegister.class));
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}
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});
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}
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private void tloginInfo() {
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String userId = tno.getText().toString();
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String userPassword = tpassword.getText().toString();
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//get 请求
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String login_check_url = "http://169.254.115.53:8080/shixun/T_Login";
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RequestBody requestBody = new FormBody.Builder()
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.add( "username",userId)
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.add("password",userPassword)
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.build();
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okhttp3.Callback callback = new okhttp3.Callback()
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{
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@Override
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public void onResponse(Call call, Response response) throws IOException {
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String responseData = response.body().string();
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Log.e("LoginActivity","onResponse");
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Log.e("LoginActivity",responseData);
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if(responseData.equals("success")) {
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Looper.prepare();
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Toast.makeText(context, "恭喜您登录成功",Toast.LENGTH_SHORT).show();
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startActivity(new Intent(TeacherLogin.this, TestSettingActivity.class));
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finish();
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Looper.loop();
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}
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else {
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Message msg = new Message();
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msg.what = MSG_LOGIN_ERR;
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login_handler.sendMessage(msg);
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}
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}
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@Override
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public void onFailure(Call call, IOException e) {
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String responseData = "Error!";
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Log.e("LoginActivity","Failure");
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Log.e("LoginActivity",responseData);
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Message msg = new Message();
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msg.what = MSG_CONNET_ERR;
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login_handler.sendMessage(msg);
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}
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};
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OkHttpClient client = new OkHttpClient();
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Request request = new Request.Builder()
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.url(login_check_url)
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.post(requestBody)
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.build();
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//发送请求
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client.newCall(request).enqueue(callback);
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}
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//判断登录信息是否合法
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private boolean judge() {
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if (TextUtils.isEmpty(tno.getText().toString()) ) {
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Toast.makeText(context, "用户名不能为空",Toast.LENGTH_SHORT).show();
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return false;
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} else if (TextUtils.isEmpty(tpassword.getText().toString())) {
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Toast.makeText(context, "密码不能为空",Toast.LENGTH_SHORT).show();
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return false;
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}
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return true;
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}
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/**
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3 * 事件捕获
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4 */
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class LoginHandler extends Handler {
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@Override
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public void dispatchMessage(Message msg) {
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super.dispatchMessage(msg);
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switch (msg.what) {
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case MSG_LOGIN_ERR:
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tno.setText("");
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tpassword.setText("");
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tno.requestFocus();
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new AlertDialog.Builder(TeacherLogin.this)
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.setTitle("注意")
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.setMessage("用户名或密码输入不正确，请重新输入")
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.setPositiveButton("确定",null)
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.create()
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.show();
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login.setEnabled(true);
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break;
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case MSG_CONNET_ERR:
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new AlertDialog.Builder(TeacherLogin.this)
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.setTitle("注意")
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.setMessage("网络连接错误，请检查网络")
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.setPositiveButton("确定",null)
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.create()
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.show();
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break;
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}
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}
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}
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}
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