第7个作业

 

 

 

 

package com.example.chongzhi;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

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 number = (EditText) findViewById(R.id.number);
        String s = number.getText().toString();
        if (s.length() == 11) {
            Intent intent = new Intent(this, activity_main2.class);
            intent.putExtra("number", s);
            startActivityForResult(intent, 1);
        }else{
            Toast.makeText(this, "请输入11位的电话号码", 0).show();;
        }
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1 && resultCode == 2) {
            String data1 = data.getStringExtra("fcz");
            TextView fcz = (TextView) findViewById(R.id.fcz);
            fcz.setText(data1);
            String data2 = data.getStringExtra("sb");
            TextView qx = (TextView) findViewById(R.id.qx);
            qx.setText(data2);
        }
    }

}

package com.example.chongzhi;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.EditText;

public class activity_main2 extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Intent intent = getIntent();
        EditText jnumber = (EditText) findViewById(R.id.jnumber);
        jnumber.setText(intent.getStringExtra("number") + "的号码充值");
    }

    public void click1(View v) {
        EditText je = (EditText) findViewById(R.id.je);
        String s = je.getText().toString();
        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra("fcz", "成功充值" + s + "块钱");
        setResult(2, intent);
        finish();
    }

    public void click2(View v) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.putExtra("sb", "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.day10_20.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:text="手机号码"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/qx"
        android:layout_width="80dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/fcz"
        android:layout_marginTop="35dp"
        android:layout_toLeftOf="@+id/cz"
        android:ems="10"
        android:textSize="10dp" />

    <EditText
        android:id="@+id/number"
        android:layout_width="200dp"
        android:layout_height="30dp"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="14dp"
        android:ems="10"
        android:phoneNumber="true"
        android:textSize="10dp" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/cz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/number"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="62dp"
        android:onClick="click"
        android:text="充值" />

    <TextView
        android:id="@+id/fcz"
        android:layout_width="100dp"
        android:layout_height="30dp"
        android:layout_alignLeft="@+id/qx"
        android:layout_below="@+id/cz"
        android:layout_marginTop="54dp"
        android:ems="10"
        android:textSize="10dp" />

</RelativeLayout>

<?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"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        android:text="你要为："
        android:textSize="20dp" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:text="充值金额："
        android:textSize="20dp" />

    <EditText
        android:id="@+id/jnumber"
        android:layout_width="200dp"
        android:layout_height="30dp"
        android:layout_alignBottom="@+id/textView1"
        android:layout_toRightOf="@+id/textView1" 
        android:textSize="10dp"/>

    <EditText
        android:id="@+id/je"
        android:layout_width="100dp"
        android:layout_height="30dp"
        android:layout_alignBaseline="@+id/textView2"
        android:layout_alignBottom="@+id/textView2"
        android:layout_centerHorizontal="true"
        android:textSize="10dp" />

    <Button
        android:id="@+id/b1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/je"
        android:layout_marginLeft="38dp"
        android:layout_marginTop="145dp"
        android:onClick="click1"
        android:text="充值" />

    <Button
        android:id="@+id/b2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/b1"
        android:layout_alignBottom="@+id/b1"
        android:layout_alignRight="@+id/jnumber"
        android:onClick="click2"
        android:text="取消充值" />

</RelativeLayout>

4.6使用Fragment

4.6.1 Fragment简介

Fragment（碎片）嵌入Activity中的UI片段，描述部分布局，一个Activity可以包含多个Fragment，一个Fragment也可以在多个Activity中使用。

4.6.2 Fragment的生命周期

(1)onAttach()建立关联时调用（2）onCreateView()创建试图调用（3）onActivityCreate()相关联的Activity已创建完成时调用

(4)onDestoryView()关联的视图被移除时调用(5)onDetach()接触关联时调用

4.6.3 创建Fragment

 

public class NewListFragment extends Fragment {
    public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle saveInstanceState) {
        View v= inflater.inflate(R.layout.fragment, container, false);
        return v;
    }

}

 

4.6.4 在Activity中添加Fragment

1.在布局文件中添加Fragment

<fragment 
        android:name="com.example.NewListFargment"
        android:id="@+id/newlist"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

2.在Activity中动态加载Fragment

（1）创建一个Fragment的实例对象

（2）获取FragmentManager的实例

（3）开启FragmentTransaction(事务)

（4）向Activity的布局容器中添加Fragment

（5）通过commit()方法提交事务

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //在Actvivity中动态添加Fragment
    /*步骤：A:创建一个Fragment的实例对象
            B:获取FragmentManager(Fragment管理器)的实例
            C:开启FragmentTransaction(事务)
            D:向Activity的布局容器(一般为FrameLayout)中添加Fragment
            E:通过commit()方法提交事务
    */
    //代码如下:
        NewListFragment fragment=new NewListFragment();//实例化Fragment对象
        FragmentManager fm= getFragmentManager();//获取FragmentManager的实例
        //获取FragmentTransaction实例
        FragmentTransaction bgt=fm.beginTransaction();
        //bgt.replace(, fragment);
        
    }