作业七

package com.example.demo01;

import android.support.v7.app.ActionBarActivity;
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;

public class MainActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void click(View v) {
        EditText et1=(EditText)findViewById(R.id.eT1);
        String S= et1.getText().toString();
        Intent intent=new Intent();
        intent.setClass(this,SecondActivity.class);
        intent.putExtra("et1",S);
        startActivityForResult(intent,1);
    }
    
    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(requestCode==1&&resultCode==2) {
            TextView tv1=(TextView)findViewById(R.id.tV2);
            String Data1=data.getStringExtra("tV2");
            tv1.setText(Data1);
                
            String Data2=data.getStringExtra("tV3");
            TextView tv2=(TextView)findViewById(R.id.tV3);
            tv2.setText(Data2);
        }
    }
}

    

package com.example.demo01;

import android.support.v7.app.ActionBarActivity;
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;

public class SecondActivity extends ActionBarActivity {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);
        Intent intent=getIntent();
        TextView tv1=(TextView)findViewById(R.id.textView1);
        tv1.setText(intent.getStringExtra("et1")+"的号码充值");
    }

        public void CZ(View v) {
                EditText et1=(EditText)findViewById(R.id.editText1);
                String s2=et1.getText().toString();
                Intent intent =new Intent(this,MainActivity.class);
                intent.putExtra("tV2","成功充值"+s2+"块钱");
                setResult(2,intent);
                finish();
                
        }
        public void QX(View v) {
            Intent intent =new Intent(this,MainActivity.class);
            intent.putExtra("tV3","充值失败");
            setResult(2,intent);
            finish();
        
    }
}

<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="com.example.demo01.MainActivity" >

    
<TextView
        android:id="@+id/tV1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="手机号码:" />

    <EditText
        android:id="@+id/eT1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignTop="@+id/tV1"
        android:layout_marginLeft="15dp"
        android:layout_toRightOf="@+id/tV1"
        android:background="#ffffff"
        android:ems="10" />

    <TextView
        android:id="@+id/tV2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tV1"
        android:layout_alignRight="@+id/cz"
        android:layout_below="@+id/cz"
        android:layout_marginTop="62dp" />

    <Button
        android:id="@+id/cz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/eT1"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="122dp"
        android:onClick="click"
        android:text="充值" />

    <TextView
        android:id="@+id/tV3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/tV2"
        android:layout_alignRight="@+id/tV2"
        android:layout_below="@+id/tV2"
        android:layout_marginTop="54dp" />

</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"
    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="com.example.demo01.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView2"
        android:layout_alignLeft="@+id/editText1"
        android:layout_alignRight="@+id/editText1" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="20dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textView3"
        android:layout_marginLeft="26dp"
        android:layout_marginTop="36dp"
        android:text="充值金额:" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="200dp"
        android:layout_height="20dp"
        android:layout_alignTop="@+id/textView2"
        android:layout_toRightOf="@+id/textView2"
        android:background="#ffffff"
        android:ems="10" />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignRight="@+id/editText1"
        android:layout_marginBottom="155dp" 
        android:text="取消充值"
        android:onClick="QX"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="154dp" 
        android:text="充值"
        android:onClick="CZ"/>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignParentTop="true"
        android:layout_marginTop="20dp"
        android:text="你要为:" 
        />
    

</RelativeLayout>