作业8

package com.example.x8;

import com.example.x8.MainActivity2;
import com.example.x8.R;
import com.example.x8.MainActivity;

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

public class MainActivity extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    
    //点按钮开启第二个窗口
    public void click(View v){
        Intent intent=new Intent(this,MainActivity2.class);        
        startActivityForResult(intent, 1);
        EditText editText1= (EditText)findViewById(R.id.editText1);
        String editText11=editText1.getText().toString();
        intent.putExtra("textView1",editText1.getText().toString());        
        startActivity(intent);
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        // TODO Auto-generated method stub
        Log.v("520sd", requestCode+""+resultCode+"");
        if(requestCode==1){
            switch(resultCode){
            case 2:
                String text=intent.getStringExtra("textView3");
        Toast.makeText(MainActivity.this,"充值"+text, 0).show();
                break;
            case 3:
            Toast.makeText(MainActivity.this,"充值失败", 0).show();
                break;            
            }
        }
    }

    

}

package com.example.x8;

import com.example.x8.R;
import com.example.x8.MainActivity;

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;

public class MainActivity2 extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity2);
        TextView textView1 = (TextView) findViewById(R.id.textView1);
        Intent intent =getIntent();
        String text =intent.getStringExtra("textView1");
        textView1.setText(""+text+"");
    }


    public void click(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        //如果点的按钮是button2
        case R.id.b2:                    
            EditText editText1= (EditText)findViewById(R.id.editText1);
            String editText11=editText1.getText().toString();
            Intent intent=new Intent();
             intent.setClass(this,MainActivity.class);
                intent.putExtra("textView3",editText1.getText().toString());  
            setResult(2, intent);//结果码是2,结果码标记一下是按哪个按钮回去的
            finish();//关闭当前窗口
            break;            
        case R.id.b3:            
            intent=new Intent();
            setResult(3, intent);//结果码为3
            finish();//finish点击后当前窗口立即关闭，回到上个窗口的onActivityResult方法
            break;
            
        }

    }


}

<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.x8.MainActivity" >



    <TextView
        android:id="@+id/textView1"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="77dp"
        android:text="输入手机号"
        android:textSize="18sp" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="131dp"
        android:onClick="click"
        android:text="充值" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="150dp"
        android:layout_height="40dp"
        android:layout_alignLeft="@+id/button1"
        android:layout_alignTop="@+id/textView1"
        android:layout_marginLeft="16dp"
        android:ems="10" >

        <requestFocus />
    </EditText>

</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.x8.MainActivity2" >

       <TextView
        android:id="@+id/textView2"
        android:layout_width="140dp"
        android:layout_height="40dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="47dp"
        android:text="你要为手机号充值"
        android:textSize="15sp" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="150dp"
        android:layout_height="40dp"
        android:layout_alignBottom="@+id/textView2"
        android:layout_alignParentRight="true"
        android:layout_marginTop="47dp"
        android:textSize="15sp"
        android:text="" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="100dp"
        android:layout_height="40dp"
        android:layout_alignBottom="@+id/textView3"
        android:layout_alignParentRight="true"
         android:layout_marginTop="140dp"
        android:ems="10" />

    <Button
        android:id="@+id/b2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView3"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="96dp"
        android:onClick="click"
        android:text="充值" />

    <Button
        android:id="@+id/b3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_marginBottom="96dp"
        android:onClick="click"
        android:text="取消充值" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="140dp"
        android:layout_height="40dp"
        android:layout_alignLeft="@+id/textView2"
        android:layout_below="@+id/textView2"
        android:layout_marginTop="69dp"
        android:text="充值金额"
        android:textSize="15sp" />
    
</RelativeLayout>