【android编程】Android基本控件实践题

【Android编程】 第四讲-Android基本控件实践题 文章目录【android编程】 第四讲-Android基本控件实践题1. 编辑框 EditText+普通按钮 Button+表格布局0. 题目要求1. activity_main.xml2. MainActivity.java3. 结果展示2. RadioButton复选按钮 CheckBox练习0. 题目要求1. activity_main.xml2. MainActivity.java3. 结果展示 1. 编辑框 EditText+普通按钮 Button+表格布局 0. 题目要求

使用表格布局管理器完成附件中图片所示的程序，将密码设置为“123456”，在按下登录按钮后，显示“欢迎XXX”。然后清空姓名和密码的编辑框。如果选择取消则直接清除所有编辑框中的内容。

提示：XXX为输入的姓名。

1. activity_main.xml

2. MainActivity.java

package com.example.bean.myapplication34v2;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final EditText et1 =(EditText)findViewById(R.id.ed1);
        final EditText et2 =(EditText)findViewById(R.id.ed2);
        Button bt1 = (Button)findViewById(R.id.bt1);
        Button bt2 = (Button)findViewById(R.id.bt2);
        bt1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                et1.setText("请输入姓名");
                et2.setText("");
            }
        });
        bt2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (et2.getText().toString().equals("123456"))
                {
                    Toast toast = Toast.makeText(MainActivity.this,et1.getText().toString()+"登陆成功",Toast.LENGTH_LONG);
                    toast.show();
                }
                else
                {
                    Toast toast = Toast.makeText(MainActivity.this,"密码错误！请重新输入",Toast.LENGTH_LONG);
                    toast.show();
                }
            }
        });
    }
}

3. 结果展示

2. MainActivity.java

package com.example.bean.myapplication34v3;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button bt = (Button)findViewById(R.id.button);
        final EditText ed1 = (EditText)findViewById(R.id.ed1);
        final RadioGroup group = (RadioGroup)findViewById(R.id.group1);
        final CheckBox like1 = (CheckBox)findViewById(R.id.like1);
        final CheckBox like2 = (CheckBox)findViewById(R.id.like2);
        final CheckBox like3 = (CheckBox)findViewById(R.id.like3);
        final CheckBox like4 = (CheckBox)findViewById(R.id.like4);
        final TextView text = (TextView)findViewById(R.id.text0);
        final String str[] = new String[3];
        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                str[0] = ed1.getText().toString();
                for(int i = 0; i<group.getChildCount(); i++){
                    RadioButton sex = (RadioButton)group.getChildAt(i);
                    if (sex.isChecked()){
                        str[1] = (String) sex.getText();
                        break;
                    }
                }
                String like = "";
                if (like1.isChecked()){
                    like+=like1.getText().toString() + "、";
                }
                if (like2.isChecked()){
                    like+=like2.getText().toString() + "、";
                }
                if (like3.isChecked()){
                    like+=like3.getText().toString() + "、";
                }
                if (like4.isChecked()){
                    like+=like4.getText().toString() + "、";
                }
                if(like.isEmpty()){
                }
                else {
                    like = like.substring(0, like.length() - 1);
                }
                str[2]=like;
                text.setText(str[0]+"，"+ str[1] + "，喜欢：" + str[2]);
            }
        });
    }
}

3. 结果展示

作者：江山点墨