作业七（2）

<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"
                tools:context=".MainActivity" >
    <LinearLayout
            android:orientation="horizontal"
            android:id="@+id/LinearLayout1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="50sp"
    >
        <TextView
                android:id="@+id/tv1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="手机号码:"
                android:textSize="20sp"
        />

        <EditText
                android:id="@+id/et1"
                android:layout_width="192dp"
                android:layout_height="wrap_content"
                android:textSize="20sp"
                android:hint="请输入手机号"/>
    </LinearLayout>

    <Button
            android:id="@+id/bt1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/LinearLayout1"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="141dp"
            android:text="充值"
            android:onClick="click"/>

</RelativeLayout>

<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"
                tools:context=".MainActivity" >

    <LinearLayout
            android:id="@+id/LinearLayout2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="50sp"
            android:orientation="horizontal" >

        <TextView
                android:id="@+id/tv2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="您要为:"
                android:textSize="20sp" />

        <TextView
                android:id="@+id/tv4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="6"
                android:text=""
                android:textSize="20sp" />

        <TextView
                android:id="@+id/tv3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="充值"
                android:textSize="20sp"
        />
    </LinearLayout>

    <LinearLayout
            android:id="@+id/LinearLayout3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/LinearLayout2"
            android:layout_below="@+id/LinearLayout2"
            android:layout_marginTop="43dp"
            android:orientation="horizontal" >
        <TextView
                android:id="@+id/tv5"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="充值金额:"
                android:textSize="20sp"  />
        <EditText
                android:id="@+id/et2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="20sp"/>
    </LinearLayout>

    <Button
            android:id="@+id/bt3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/bt2"
            android:layout_alignBottom="@+id/bt2"
            android:layout_alignParentRight="true"
            android:layout_marginRight="26dp"
            android:text="取消充值"
            android:onClick="click2"/>

    <Button
            android:id="@+id/bt2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignRight="@+id/LinearLayout3"
            android:layout_below="@+id/LinearLayout3"
            android:layout_marginTop="72dp"
            android:onClick="click1"
            android:text="充值" />

</RelativeLayout>

package com.example.myapplication8;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    private EditText et1;
    private Button bt1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et1=(EditText) findViewById(R.id.et1);
        bt1=(Button) findViewById(R.id.bt1);

    }

    //点按钮开启第二个窗口
    public void click(View v){
        if (et1.length()!=11) {
            Toast.makeText(this, "输入错误，重新输入", 0).show();
        }else {
            Intent intent=new Intent(this,SecondActiviy.class);
            String s1=et1.getText().toString();
            intent.putExtra("sjh", s1);
            startActivityForResult(intent, 1);
        }

    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        String s1 = data.getStringExtra("data");
        String s2=et1.getText().toString();
        if(requestCode==1){
            switch(resultCode){
                case 2:
                    Toast.makeText(this,"您成功为用户"+s2+"充值"+s1+"元", 0).show();
                    break;
                case 3:
                    Toast.makeText(this,"充值失败", 0).show();
                    break;
            }
        }
    }
}

package com.example.myapplication8;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;


//点按钮开启第二个窗口
public class SecondActiviy extends Activity  {
    private EditText et2;
    private TextView tv4;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout);
        et2=(EditText) findViewById(R.id.et2);
        tv4=(TextView) findViewById(R.id.tv4);
        Intent intent=getIntent();
        String s1=intent.getStringExtra("sjh");
        tv4.setText(s1);
    }


    public void click1(View view) {
        Intent intent = new Intent();
        intent.putExtra("data", et2.getText().toString());
        setResult(2, intent);
        finish();
    }

    public void click2(View view) {
        Intent intent = new Intent();
        setResult(3, intent);
        finish();
    }
}

 

来源：https://www.cnblogs.com/liyongliang0728/p/11725895.html