一.公用的實體類工具類

Animal.java

package com.example.administrator.databindtext12225;import android.databinding.ObservableField;import android.databinding.ObservableInt;/** * Created by Administrator on 2016/11/27 0027. */public class Animal {    public final ObservableField<String> field = new ObservableField<>();    public final ObservableInt age = new ObservableInt();}
user.java
package com.example.administrator.databindtext12225;import android.databinding.BaSEObservable;import android.databinding.Bindable;/** * Created by Administrator on 2016/12/25 0025. */public class User extends BaseObservable{    PRivate String name;    private String address;    private int age;    @Bindable    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;        //和bindable配對使用//        notifyPropertyChanged(com.example.administrator.databindtext.BR.name);        notifyPropertyChanged(com.example.administrator.databindtext12225.BR.name);    }    @Bindable    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;        notifyPropertyChanged(com.example.administrator.databindtext12225.BR.address);    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }}
other/user.java
package com.example.administrator.databindtext12225.other;import android.databinding.BaseObservable;/** * Created by Administrator on 2016/12/25 0025. */public class User extends BaseObservable{    private String daxiongName;    private String daxiongAddress;    private int daxiongAge;    public String getDaxiongName() {        return daxiongName;    }    public void setDaxiongName(String daxiongName) {        this.daxiongName = daxiongName;    }    public String getDaxiongAddress() {        return daxiongAddress;    }    public void setDaxiongAddress(String daxiongAddress) {        this.daxiongAddress = daxiongAddress;    }    public int getDaxiongAge() {        return daxiongAge;    }    public void setDaxiongAge(int daxiongAge) {        this.daxiongAge = daxiongAge;    }}
//student.java
import android.databinding.BaseObservable;import android.databinding.ObservableBoolean;import android.databinding.ObservableField;/** * Created by Administrator on 2016/12/25 0025. */public class Student extends BaseObservable{    public ObservableField<String> stuName = new ObservableField<>();    public ObservableBoolean isMan = new ObservableBoolean();    private String stuAge;    public String getStuAge() {        return stuAge;    }    public void setStuAge(String stuAge) {        this.stuAge = stuAge;    }}
MyAdapter.java
package com.example.administrator.databindtext12225;import android.databinding.DataBindingUtil;import android.databinding.ViewDataBinding;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.ArrayList;/** * Created by Administrator on 2016/12/25 0025. */public class MyAdapter extends RecyclerView.Adapter {    private ArrayList<Student> mData = new ArrayList<>();    public  MyAdapter(ArrayList<Student> data) {        mData.addAll(data);    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        ViewDataBinding binding = DataBindingUtil.inflate(LayoutInflater                .from(parent.getContext()), R.layout.item_recycleview, parent, false);       ViewHolder holder = new ViewHolder(binding.getRoot());        holder.setBinding(binding);        return holder;    }    /**     * ViewDataBinding是我們之前用的那些binding的父類，只有自動生成的那些子類才會有setXXX方法，那現在我們需要在ViewDataBinding中設置變量咋辦？這個類為我們提供了setVariable去設置變量，第一個參數是我們的變量名的引用，第二個是我們要設置的值     *當數據改變時，binding會在下一幀去改變數據，如果我們需要立即改變，就去調用executePendingBindings方法     *  */    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        ((ViewHolder)holder).getBinding().setVariable(com.example.administrator.databindtext12225.BR.stu,mData.get(position));        ((ViewHolder)holder).getBinding().executePendingBindings();        ((ViewHolder)holder).getBinding().setVariable(com.example.administrator.databindtext12225.BR.drawableId,R.mipmap.ic_launcher);    }    @Override    public int getItemCount() {        return mData.size();    }    class ViewHolder extends RecyclerView.ViewHolder {        private ViewDataBinding binding;        public ViewHolder(View itemView) {            super(itemView);        }        public void setBinding(ViewDataBinding binding) {            this.binding = binding;        }        public ViewDataBinding getBinding() {            return this.binding;        }    }}
Utill.java
package com.example.administrator.databindtext12225;import android.databinding.BindingAdapter;import android.widget.ImageView;/** * Created by Administrator on 2016/12/25 0025. */public class Utils {    @BindingAdapter({"bind:image"})    public static void imageLoader(ImageView imageView, int  drawableId) {        imageView.setBackgroundResource(drawableId);    }}
二.Mainactivity.java
/** * 這里主要寫的是怎么把 * 1.對象  和 基本數據類型  跟view綁定 * 2.給include的布局  傳遞對象 * 3.@{user.displayName ?? user.lastName  如果不是null  就是自身，如果是null就是user.lastName * 4. * <TextView android:layout_width="wrap_content" * android:layout_height="wrap_content" * android:text="@{user.firstName, default=超哥}"/> * 5.如何 import 相同類名的class */public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private User mUser;    private com.example.administrator.databindtext12225.other.User mOtherUser;    private ActivityMainBinding mBinding;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mBinding = DataBindingUtil.setContentView(this, R.layout.activity_main);        mUser = new User();        mUser.setName("超哥");        mUser.setAddress("北一峰");        mOtherUser = new com.example.administrator.databindtext12225.other.User();        mOtherUser.setDaxiongName("我是大雄");        mOtherUser.setDaxiongAddress("南一峰");        mBinding.setUser(mUser);        mBinding.setOtheruser(mOtherUser);        //editText 輸入完成改變對象        mBinding.btOtherUserConfirm.setOnClickListener(this);        mBinding.btUserConfirm.setOnClickListener(this);        //跳轉到SecondActivity        mBinding.btJump.setOnClickListener(this);    }    @Override    public void onClick(View view) {        if (view == mBinding.btUserConfirm) {            System.out.println("xcqw btUserConfirm   name" + mBinding.etUserName.getText().toString() + "  address  " + mBinding.etUserAddress.getText().toString());//        方法1：    這種不會立即改變View  （user沒有繼承baseObservale）//            mUser.setName(mBinding.etUserName.getText().toString());//            mUser.setAddress(mBinding.etUserAddress.getText().toString());//        方法2：  這種就會立即改變View(也就是重新設置一個user)//            User user = new User();//            user.setName(mBinding.etUserName.getText().toString());//            user.setAddress(mBinding.etUserAddress.getText().toString());//            mBinding.setUser(user);//        方法3：    會立即改變View//            1.user extends baseobservable//            2.在get方法上@bindable//            3.在set方法notifyPropertyChanged            mUser.setName(mBinding.etUserName.getText().toString());            mUser.setAddress(mBinding.etUserAddress.getText().toString());        } else if (view == mBinding.btOtherUserConfirm) {//        方法1：  這種不會立即改變View//            System.out.println("xcqw btOtherUserConfirm  name"+mBinding.etOtherUserName.getText().toString()+"  address  "+mBinding.etOtherUserAddress.getText().toString());//            mOtherUser.setDaxiongName(mBinding.etOtherUserName.getText().toString());//            mOtherUser.setDaxiongAddress(mBinding.etOtherUserAddress.getText().toString());//        方法2：  這種就會立即改變View            com.example.administrator.databindtext12225.other.User user = new com.example.administrator.databindtext12225.other.User();            user.setDaxiongName(mBinding.etOtherUserName.getText().toString());            user.setDaxiongAddress(mBinding.etOtherUserAddress.getText().toString());            mBinding.setOtheruser(user);        } else if (view == mBinding.btJump) {            startActivity(new Intent(MainActivity.this, SecondActivity.class));        }    }}
Activity_main.xml
<?xml version="1.0" encoding="utf-8"?><layout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:bind="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools">    <data>        <variable            name="user"            type="com.example.administrator.databindtext12225.User">        </variable>        <!--因為type="User"都為User類，會導致不知道到那個包，所以可以通過alias屬性重命名type的類型-->        <import            alias="Other"            type="com.example.administrator.databindtext12225.other.User"/>        <variable            name="otheruser"            type="Other">        </variable>    </data>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical">        <include            layout="@layout/include_layout"            bind:user="@{user}"            />        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical"            tools:context="com.example.administrator.databindtext12225.MainActivity">            <TextView                android:id="@+id/tv_user_name"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@{`userName`+user.name}"/>            <TextView                android:id="@+id/tv_user_address"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@{`userAddress`+user.address}"/>        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical"            tools:context="com.example.administrator.databindtext12225.MainActivity">            <TextView                android:id="@+id/tv_other_user_name"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@{`otherUserName`+otheruser.daxiongName}"/>            <TextView                android:id="@+id/tv_other_user_address"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@{`otherUserAddress`+otheruser.daxiongAddress}"/>        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical">            <EditText                android:id="@+id/et_user_name"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:hint="請輸入user的name"/>            <EditText                android:id="@+id/et_user_address"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:hint="請輸入user的address"/>            <Button                android:id="@+id/bt_user_confirm"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="確認輸入，改變userView"/>        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="vertical">            <EditText                android:id="@+id/et_other_user_name"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:hint="請輸入otheruser的name"/>            <EditText                android:id="@+id/et_other_user_address"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:hint="請輸入otheruser的address"/>            <Button                android:id="@+id/bt_other_user_confirm"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="確認輸入，改變otherUserView"/>        </LinearLayout>        <Button            android:id="@+id/bt_jump"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="跳到SecondActivity"/>    </LinearLayout></layout>
二.SecondActivity.java
** * 1.一些特殊字符的轉義，&lt;String&gt    左右尖括號的寫法 * 2.對象綁定的另外一種方法 屬性都用observal * 3.arrayList，map綁定的方法 * 4.map的兩種寫法 * normalMap.get(`age`) * map[`name`] * 5.在布局文件中可以用``拼接字符串 * */public class SecondActivity extends AppCompatActivity {    private ActivitySecondBinding mBinding;    private ObservableArrayList<com.example.administrator.databindtext12225.other.User> arrayList;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mBinding = DataBindingUtil.setContentView(SecondActivity.this, R.layout.activity_second);//第一部分  普通的寫法不會直接互相綁定//        final ArrayList<String> normalList = new ArrayList<>();//        normalList.add("first");//        normalList.add("second");//        mBinding.setNormalList(normalList);////        final Map<String, String> normalMap = new HashMap<>();//        normalMap.put("name", "zhangsan");//        normalMap.put("age", "40");//        mBinding.setNormalMap(normalMap);////        final String[] normalArrays = {"lisi", "laowang"};//        mBinding.setNormalArrays(normalArrays);        //第二部分 這么寫才會互相綁定        final Animal animal = new Animal();        animal.field.set("cat");        animal.age.set(2);        mBinding.setAnimal(animal);        arrayList = new ObservableArrayList<>();        for (int i=0;i<2;i++){            com.example.administrator.databindtext12225.other.User user = new com.example.administrator.databindtext12225.other.User();            user.setDaxiongName("大熊"+i+"號");            arrayList.add(user);        }        mBinding.setUserList(arrayList);        final ObservableArrayList<String> list = new ObservableArrayList<>();        list.add("daxiong");        list.add("daxiong2");        mBinding.setList(list);        final ObservableArrayMap<String, String> map = new ObservableArrayMap<>();        map.put("name","Tom");        map.put("age","4");        mBinding.setMap(map);        mBinding.btChangeValue.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {//                第一部分  這么寫不會互相綁定//                normalList.set(0,"hehe");//                normalList.set(1,"haha");//                normalMap.put("name","sam");//                normalMap.put("age","5");//                normalArrays[0] = "zhaosi";                //第二部分                //作用類型  對象的bindable                animal.field.set("dog");                animal.age.set(4);                list.set(0,"cat");                list.set(1,"dog");                map.put("name","Sam");                map.put("age","5");                //other/user中的屬性需要加上  notifyPropertyChanged(BR.daxiongName); 才會生效，否則沒用                arrayList.get(0).setDaxiongName("大熊一號改裝過");                arrayList.get(1).setDaxiongName("大熊二號改裝過");            }        });        mBinding.btJumpThirdactivity.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                startActivity(new Intent(SecondActivity.this,ThirdActivity.class));            }        });    }}Activity_second.xml
<?xml version="1.0" encoding="utf-8"?><layout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context="com.example.administrator.databindtext12225.SecondActivity">    <data>        <import type="java.util.ArrayList" />        <import type="java.util.Map" />        <import type="java.lang.String" />        <import type="com.example.administrator.databindtext12225.other.User" />        <variable            name="secondActivity"            type="com.example.administrator.databindtext12225.SecondActivity">        </variable>        <!--第一部分-->        <variable        name="normalList"        type="ArrayList&lt;String>"/>        <!--泛型的支持會在編譯時期報紅線，但是是可以直接運行的        但是需要通過轉義字符才行，如：&lt;數據類型> 或者&lt;數據類型&gt;-->        <!--&lt <  &gt >   貌似這個gt可以直接用>  但是<必須被替換-->        <variable        name="normalMap"        type="Map&lt;String,String&gt;" />        <variable        name="normalArrays"        type="String[]" />        <!--第一部分結束-->        <!--這么寫一直報錯，非要寫的跟下面一樣，把user拿出去！！！！-->        <!--<variable-->            <!--name="user"-->            <!--type="com.example.administrator.databindtext12225.User">-->        <!--</variable>-->        <variable            name="user"            type="User">        </variable>        <variable            name="animal"            type="com.example.administrator.databindtext12225.Animal">        </variable>        <variable            name="userList"            type="android.databinding.ObservableArrayList&lt;User&gt;"/>        <variable            name="list"            type="android.databinding.ObservableArrayList&lt;String&gt;"/>        <variable            name="map"            type="android.databinding.ObservableArrayMap&lt;String,String&gt;"/>    </data><LinearLayout    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    ><!--第一部分-->    <!--<TextView-->    <!--android:layout_width="wrap_content"-->    <!--android:layout_height="wrap_content"-->    <!--android:text="@{normalList[0]}"/>-->    <!--<TextView-->    <!--android:layout_width="wrap_content"-->    <!--android:layout_height="wrap_content"-->    <!--android:text="@{normalList[1]}"/>-->    <!--&lt;!&ndash;!!!!! `````這個符號可以憑借字符串&ndash;&gt;-->    <!--<TextView-->    <!--android:layout_width="wrap_content"-->    <!--android:layout_height="wrap_content"-->    <!--android:text="@{normalMap.get(`age`)}"/>-->    <!--<TextView-->    <!--android:layout_width="wrap_content"-->    <!--android:layout_height="wrap_content"-->    <!--android:text="@{normalArrays[0]}"/>-->    <!--第一部分結束-->    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`animal.filed`+animal.field}" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`animal.age`+String.valueOf(animal.age)}" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`list[0]`+list[0]}" />    <!--Map集合既可以通過map[key]的方式，也可以通過調用API-->    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`list[1]`+list[1]}" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`map[name]`+map[`name`]}" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`otheruserList[0]name`+userList[0].getDaxiongName}" />    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@{`otheruserList[1]name`+userList[1].getDaxiongName}" />    <Button        android:id="@+id/bt_change_value"        android:layout_width="wrap_content"        android:text="改變數據"        android:layout_height="wrap_content" /><Button    android:id="@+id/bt_jump_thirdactivity"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="跳到ThirdActivity"/></LinearLayout></layout>
三.ThirdActivity.java
/** * 1.點擊事件的幾種寫法 * */public class ThirdActivity extends AppCompatActivity {    private ActivityThirdBinding mBinding;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        mBinding = DataBindingUtil.setContentView(ThirdActivity.this, R.layout.activity_third);        User user = new User();        user.setName("我是第三個Activity");        mBinding.setUser(user);//        第二種點擊事件寫法        mBinding.setClickEvent(new View.OnClickListener() {            @Override            public void onClick(View view) {                Toast.makeText(ThirdActivity.this, "xcqw 我是第二種點擊事件寫法", Toast.LENGTH_SHORT).show();            }        });//        第三種點擊事件寫法        mBinding.setMyEvent(new MyEventListener() {            @Override            public void clickEventOne(View view) {                Toast.makeText(ThirdActivity.this, "xcqw 我是第三種寫法  clickEventOne", Toast.LENGTH_SHORT).show();            }            @Override            public void clickEventTwo(View view) {                Toast.makeText(ThirdActivity.this, "xcqw 我是第三種寫法  clickEventTwo", Toast.LENGTH_SHORT).show();            }            @Override            public void clickEventThree(User user) {                Toast.makeText(ThirdActivity.this, "xcqw 我是第三種寫法  clickEventTwo username"+user.getName(), Toast.LENGTH_SHORT).show();            }        });        mBinding.btJumpFouractivity.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                startActivity(new Intent(ThirdActivity.this,FourActivity.class));            }        });    }    public void firstMethodClick(View view){//        這種傳統的點擊事件寫法還有好幾種        Toast.makeText(ThirdActivity.this, "xcqw 我是第一種寫法 firstMethodClick", Toast.LENGTH_SHORT).show();    }}
activity_third.java
<?xml version="1.0" encoding="utf-8"?><layout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context="com.example.administrator.databindtext12225.SecondActivity">    <data>                <variable            name="view"            type="android.view.View">        </variable>                <variable            name="user"            type="com.example.administrator.databindtext12225.User"/>        <variable            name="clickEvent"            type="android.view.View.OnClickListener"            />        <variable            name="myEvent"            type="com.example.administrator.databindtext12225.MyEventListener"/>    </data>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical"        >        <Button            android:id="@+id/bt_first_method"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:onClick="firstMethodClick"            android:text="第一種傳統寫法"/>        <Button            android:id="@+id/bt_second_method"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:onClick="@{clickEvent}"            android:text="第二種點擊方式"/>        <Button            android:id="@+id/bt_third_method"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:onClick="@{myEvent.clickEventOne}"            android:text="第三種新式寫法"/><!--不知道() -> myEvent.clickEventThree(user) 代表什么意思-->        <Button            android:id="@+id/bt_third_method_two"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:onClick="@{() -> myEvent.clickEventThree(user)}"            android:text="第三種新式寫法有入參"/>        <Button            android:id="@+id/bt_jump_fouractivity"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="跳到fourActivity"/>    </LinearLayout></layout>
四.FourActivity.java
package com.example.administrator.databindtext12225;import android.databinding.DataBindingUtil;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.view.View;import com.example.administrator.databindtext12225.databinding.ActivityFourBinding;import java.util.ArrayList;/** * 1.recycleView * 2.自定義binding de set方法 *      （1）現在utils方法寫一個@BindingAdapter({"bind:image"})             public static void imageLoader(ImageView imageView, int  drawableId) {             imageView.setBackgroundResource(drawableId);        （2）然后在布局里面用上             <variable             name="drawableId"             type="int" />             <ImageView             android:id="@+id/img"             android:layout_width="wrap_content"             android:layout_height="wrap_content"             app:image="@{drawableId}"/>        （3）實際用的地方            ((ViewHolder)holder).getBinding().setVariable(com.example.administrator.databindtext12225.BR.drawableId,R.mipmap.ic_launcher);// @BindingAdapter({"bind:imageUrl", "bind:error"})// public static void loadImage(ImageView view, String url, Drawable error) {// Picasso.with(view.getContext()).load(url).error(error).into(view);// } * */public class FourActivity extends AppCompatActivity {    private ActivityFourBinding mBinging;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_four);        mBinging = DataBindingUtil.setContentView(FourActivity.this, R.layout.activity_four);        mBinging.recycle.setLayoutManager(new LinearLayoutManager(this,                LinearLayoutManager.VERTICAL, false));        final ArrayList<Student> mData = new ArrayList<>();        for (int i = 0;i<10;i++){            Student stu = new Student();            stu.stuName.set("我是學生    "+i);            mData.add(stu);        }        mBinging.recycle.setAdapter(new MyAdapter(mData));        mBinging.btChangeData.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                mData.get(4).stuName.set("hahahhahaha");                //普通寫法是沒用                //1  stu 中寫bindable                //2  把String  寫成 observableField<String>            }        });    }}
Acitivyt_four.xml
<?xml version="1.0" encoding="utf-8"?><layout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context="com.example.administrator.databindtext12225.FourActivity">    <data>    </data>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical"        >    <android.support.v7.widget.RecyclerView        android:id="@+id/recycle"        android:layout_width="match_parent"        android:layout_height="wrap_content">    </android.support.v7.widget.RecyclerView>    <Button        android:id="@+id/bt_change_data"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="點我改變數據"/>    </LinearLayout></layout>
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