充值

作业一：用数据传递和回传实现以下充值功能。 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_above="@id/textview" > <TextView android:layout_width="0dp" android:layout_height="wrap_content" android:text="手机号码" android:layout_weight="1" /> <EditText android:id="@+id/edittext" android:layout_width="0dp" android:layout_height="wrap_content" android

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:layout_above="@id/textview" > <TextView android:layout_width="0dp" android:layout_height="wrap_content" android:text="手机号码" android:layout_weight="1" /> <EditText android:id="@+id/edittext" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="5" />

package com.example.chuangkou; 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.TextView; 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); EditText et2=(EditText)findViewById(R.id.et2); String s=et2

package com.example.chongzhilianxi; import android.os.Bundle; import android.app.Activity; import android.content.Intent; import android.view.Menu; import android.view.View; 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); } //点按钮开启第二个窗口 public void click(View v){ Intent intent=new Intent(this,SecondActiviy.class); startActivityForResult(intent, 1); } @Override protected void onActivityResult(int