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pybple5kv 3 years ago
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StudentLogin.java
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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();
}
}
};*/
}
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