第七次作业（充值功能）

MainActivity

package com.example.phone;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void click(View v) {
        Intent intent = new Intent(this, SecondActivity.class);
        
        String s = ((EditText) findViewById(R.id.editText1)).getText().toString();
         if (s.length() == 11 ){
             startActivityForResult(intent, 1);
             }
         else {
             Toast.makeText(MainActivity.this, "无效手机号码,请重新输入", 0).show();
         }
    }
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        // TODO Auto-generated method stub
        if(requestCode==1){
            switch(resultCode){
            case 2:
                Toast.makeText(this,"充值成功，您的充值金额为"+intent.getIntExtra("money",0)+"元",0).show();
                break;
            case 3:
                Toast.makeText(this,"充值失败", 0).show();        
                break;        
            }
        }
    }
}

SecondActivity

package com.example.phone;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class SecondActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
    }
    public void click(View v) {
        // TODO Auto-generated method stub
        String a = ((EditText) findViewById(R.id.editText1)).getText().toString();
        int money = Integer.valueOf(a);
        Intent intent = new Intent();
        switch (v.getId()) {
        // 如果点的按钮是button2
        case R.id.button2:
            // 结果码是2,结果码标记一下是按哪个按钮回去的
            intent.putExtra("money", money);
            setResult(2, intent);
            finish();// 关闭当前窗口
            break;
        case R.id.button3:
            setResult(3, intent);
            finish();// finish点击后当前窗口立即关闭，回到上个窗口的onActivityResult方法
            break;
        }
    }

}

activity_main

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/editText1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="111dp"
        android:background="#3A5FCD"
        android:onClick="click"
        android:text="充值"
        android:textColor="#FFFFFF" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignParentRight="true"
        android:phoneNumber="true"
        android:ems="10" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="102dp"
        android:text="手机号码"
        android:textSize="20sp" />

</RelativeLayout>

activity_second

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".SecondActivity" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignParentRight="true"
        android:phoneNumber="true"
        android:ems="10" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="102dp"
        android:text="充值金额"
        android:textSize="20sp" />

    <Button
        android:id="@+id/button2"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/editText1"
        android:layout_marginLeft="22dp"
        android:layout_marginTop="98dp"
        android:background="#3A5FCD"
        android:textColor="#FFFFFF"
        android:text="确认充值"
        android:onClick="click"
         />

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/editText1"
        android:layout_alignRight="@+id/textView1"
        android:layout_marginBottom="24dp"
        android:textSize="20sp" />

    <Button
        android:id="@+id/button3"
        android:layout_width="100dp"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button2"
        android:layout_alignBottom="@+id/button2"
        android:layout_alignRight="@+id/editText1"
        android:layout_marginRight="25dp"
        android:background="#3A5FCD"
        android:textColor="#FFFFFF"
        android:text="取消充值"
        android:onClick="click"
        />

</RelativeLayout>

输入11位数字号码：违规号码

手机号码有效点击充值

输入1000金额点击确认充值

点击取消充值