安卓2

安卓2

2025 年 03 月 10 日

298 次浏览

4557字数

```java
package com.example.demo;

import android.os.Bundle;
import android.provider.MediaStore.Audio.Radio;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.AdapterView;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class MainActivity extends Activity {
	
	private EditText account;
	private EditText password;
	private RadioGroup gender;
	private Spinner classroom;
	private Button submit;
	private String[] classnames = {"1班","2班"};
	
	
	private ArrayAdapter<String> adapter;

private String myname;
	private String mypsw;
	private String myclass;
	private String mysex;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();
        adapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_dropdown_item,classnames);
        
        classroom.setAdapter(adapter);
        myclass = classnames[0]; 
        
        submit.setOnClickListener(submitL);
        classroom.setOnItemSelectedListener(classroomL);
        gender.setOnCheckedChangeListener(genderL);
    };
    
    RadioGroup.OnCheckedChangeListener genderL = new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            RadioButton rad = (RadioButton) findViewById(checkedId);
            mysex = rad.getText().toString();
        }
    };

OnClickListener submitL = new OnClickListener() {
        @Override
        public void onClick(View v) {
            myname = account.getText().toString().trim();
            mypsw = password.getText().toString().trim();
            
            if (myname == null || mysex.length() == 0) {
                Toast.makeText(MainActivity.this, "姓名空", Toast.LENGTH_SHORT).show();
                return;
            }
            
            if (mypsw == null || mysex.length() == 0) {
                Toast.makeText(MainActivity.this, "密码空", Toast.LENGTH_SHORT).show();
                return;
            }
            
            if (mysex == null || mysex.length() == 0) {
                Toast.makeText(MainActivity.this, "性别空", Toast.LENGTH_SHORT).show();
                return;
            }
            
            if (myclass == null || myclass.length() == 0) {
                Toast.makeText(MainActivity.this, "班级空", Toast.LENGTH_SHORT).show();
                return;
            }
            
            StringBuilder userInfo = new StringBuilder();
            userInfo.append("姓名").append(myname).append("\n");
            userInfo.append("密码").append(mypsw).append("\n");
            userInfo.append("性别").append(mysex).append("\n");
            userInfo.append("班级").append(myclass);
            
            Toast.makeText(MainActivity.this, userInfo.toString(), Toast.LENGTH_LONG).show();
        }
    };

AdapterView.OnItemSelectedListener classroomL = new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            myclass = classnames[position];
        }

@Override
        public void onNothingSelected(AdapterView<?> parent) {
        }
    };

private void init() {
    	account = (EditText) this.findViewById(R.id.account);
    	password = (EditText) this.findViewById(R.id.password);
    	classroom = (Spinner) this.findViewById(R.id.classroom);
    	gender = (RadioGroup) this.findViewById(R.id.gender);
    	submit = (Button) this.findViewById(R.id.submit);
	}

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

```

```
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity" >

</RelativeLayout>
```

安卓2