AndroidStudio输入生日计算星座

第一步：在主界面写两个startactivity，一个用于接收第二个页面传递过来的数据；另一个用于发送用户输入的数值

public class MainActivity extends AppCompatActivity {
    private Button button;

    private  TextView tvs1;
    private  TextView tvs2;

    private TextView tv1;
    private TextView tv2;

   private EditText name;
   private EditText month;
   private EditText day;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        tv1 = (TextView) findViewById(R.id.tvs1);
        tv2 = (TextView) findViewById(R.id.tvs2);



        Intent intent1 = getIntent();//获取Intent对象

        //取出对key中的值
        String result01 = intent1.getStringExtra("result01");
        String result02 = intent1.getStringExtra("result02");
        //String day= intent1.getStringExtra("day");
        tv1.setText(result01);
        tv2.setText(result02);



        Button btn1 = (Button) findViewById(R.id.btn1);

        name = (EditText) findViewById(R.id.name);
        month = (EditText) findViewById(R.id.month);
        day = (EditText) findViewById(R.id.day);

        Intent intent = new Intent(this,SecondActivity.class);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
                public void onClick(View view) {
                intent.putExtra("name",name.getText().toString().trim());
                intent.putExtra("month",month.getText().toString().trim());
                intent.putExtra("day",day.getText().toString().trim());
                startActivity(intent);
                finish();
                }
        });

    }
}

第二步：写MainActivity的布局文件，这个可以根据个人的需求设计。

第三步：写第二个activity

public class SecondActivity extends AppCompatActivity {
    private TextView tv1;
    private TextView tv2;
    private TextView tv3;
    private Button btn2;

    private TextView result01;
    private TextView result02;

    private  TextView constellation;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        tv1 = (TextView) findViewById(R.id.tv_1);
        tv2 = (TextView) findViewById(R.id.tv_2);
        tv3 = (TextView) findViewById(R.id.tv_3);


        Intent intent1 = getIntent();//获取Intent对象

        //取出对key中的值
        String name = intent1.getStringExtra("name");
        String month = intent1.getStringExtra("month");
        String day= intent1.getStringExtra("day");
        //计算星座
        calculate();
        String constellation=calculate();

        tv1.setText(name);
        tv2.setText(constellation);


        Button btn2 = (Button) findViewById(R.id.btn2);

        result01= (TextView) findViewById(R.id.tv_1);
        result02 = (TextView) findViewById(R.id.tv_2);
        Intent intent = new Intent(this,MainActivity.class);
        btn2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                intent.putExtra("result01",result01.getText().toString().trim());
                intent.putExtra("result02",result02.getText().toString().trim());
                startActivity(intent);

            }
        });

    }

    private String calculate() {
        String month = getIntent().getStringExtra("month");
        String day = getIntent().getStringExtra("day");
        int m=Integer.parseInt(month);
        int d=Integer.parseInt(day);
            String name1="";
            if(m>0 &&m<13 && d>0 && d<32) {
                if((m ==3 && d>20) || (m ==4 && d<21)) {
                    name1 = "白羊座!";
                }else if((m ==4 && d>20) || (m ==5 && d<21)){
                    name1 = "金牛座!";
                }else if((m ==5 && d>20) || (m ==6 && d<22)){
                    name1="双子座!";
                }else if((m ==6 && d>21) || (m ==7 && d<23)){
                    name1="巨蟹座!";
                }else if((m ==7 && d>22) || (m ==8 && d<23)){
                    name1="狮子座!";
                }else if((m ==8 && d>22) || (m ==9 && d<23)){
                    name1="处女座!";
                }else if((m ==9 && d>22) || (m ==10 && d<23)){
                    name1="天枰座!";
                }else if((m ==10 && d>22) || (m ==11 && d<22)){
                    name1="天蝎座!";
                }else if((m ==11 && d>21) || (m ==12 && d<22)){
                    name1="射手座!";
                }else if((m ==12 && d>21) || (m ==1 && d<20)){
                    name1="摩羯座!";
                }else if((m ==1 && d>19) || (m ==2 && d<19)){
                    name1="水牛座!";
                }else if((m ==2 && d>18) || (m ==3 && d<21)) {
                    name1 = "双鱼座!";
                }
                   
                }else{
                    name1="您输入的生日格式不正确或者不是真实生日！";
                }
              return name1;
                }

}

第四步：写第二个activity的布局文件

下面是运行效果：