装备

​案例--------装备选择

 

创建“装备选择”工程，设计交互界面，如下：

   

  

装备选择程序对应的布局文件(activity_main.xml)如下所示：

<?xml version="1.0" encoding="utf-8"?><LinearLayout 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"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:orientation="vertical"    tools:context="cn.edu.bzu.equipment.MainActivity">    <ImageView        android:id="@+id/pet_imgv"        app:srcCompat="@drawable/ic_launcher"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:layout_marginTop="100dp" />    <TextView        android:id="@+id/pet_dialog_tv"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_horizontal"        android:text="主人，快给小宝宝买装备吧！"        android:textSize="15sp" />    <TableLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:layout_marginTop="25dp">        <!--表格第一行-->        <TableRow            android:layout_width="match_parent"            android:layout_height="wrap_content">            <TextView                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:text="生命值:"                android:textSize="10sp" />            <ProgressBar                android:id="@+id/progressBar1"                style="?android:attr/progressBarStyleHorizontal"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_gravity="center"                android:layout_weight="2" />            <TextView                android:id="@+id/tv_life_progress"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center"                android:text="80"                android:textSize="10sp" />        </TableRow>        <!--表格第二行-->        <TableRow            android:layout_width="match_parent"            android:layout_height="wrap_content">            <TextView                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:text="攻击力:"                android:textSize="10sp" />            <ProgressBar                android:id="@+id/progressBar2"                style="?android:attr/progressBarStyleHorizontal"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="2" />            <TextView                android:id="@+id/tv_attack_progress"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center"                android:text="80"                android:textSize="10sp" />        </TableRow>        <!--表格第三行-->        <TableRow            android:layout_width="match_parent"            android:layout_height="wrap_content">            <TextView                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:text="敏捷:"                android:textSize="10sp" />            <ProgressBar                android:id="@+id/progressBar3"                style="?android:attr/progressBarStyleHorizontal"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="2" />            <TextView                android:id="@+id/tv_speed_progress"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center"                android:text="80"                android:textSize="10sp" />        </TableRow>    </TableLayout>    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="50dp"        android:layout_marginRight="50dp"        android:layout_marginTop="20dp">        <Button            android:id="@+id/btn_baby"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:background="@android:color/darker_gray"            android:drawablePadding="3dp"            android:drawableRight="@android:drawable/ic_menu_add"            android:onClick="click"            android:text="小宝宝购买装备"            android:textSize="14dp" />    </RelativeLayout></LinearLayout>

创建装备界面acctivity_shop.xml,该界面是来展示装备的，界面运行效果如图：

购买装备界面(activity_shop.xml)对应的布局文件如下所示：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/r1"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <View        android:layout_width="30dp"        android:layout_height="30dp"        android:layout_alignParentLeft="true"        android:layout_centerVertical="true"        android:background="@android:drawable/ic_menu_info_details" />    <TextView        android:id="@+id/tv_name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerVertical="true"        android:layout_marginLeft="60dp"        android:text="商品名称" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:orientation="vertical">        <TextView            android:id="@+id/tv_life"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="生命值"            android:textSize="13sp" />        <TextView            android:id="@+id/tv_attack"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="攻击力"            android:textSize="13sp" />        <TextView            android:id="@+id/tv_speed"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="速度"            android:textSize="13sp" />    </LinearLayout></RelativeLayout>

​创建ItemInfo类

    在程序中创建一个包，在该包中创建一个ItemInfo类，用于封装装备信息。具体代码如下：

import java.io.Serializable;public class ItemInfo implements Serializable {    private String name;    private int acctack;    private int life;    private int speed;    public ItemInfo(String name, int acctack, int life, int speed) {        this.name = name;        this.acctack = acctack;        this.life = life;        this.speed = speed;    }    public String getName() {        return name;    }    public void setName(String name){        this.name=name;    }    public int getAcctack(){        return acctack;    }    public void setAcctack(int acctack){        this.acctack=acctack;    }    public int getLife(){        return life;    }    public void setLife(int life){        this.life=life;    }    public int getSpeed(){        return speed;    }    public void setSpeed(int speed){        this.speed=speed;    }    public String toString(){        return"[name="+name+",acctack="+acctack+",life="+life+",speed="+speed+"]";    }}

​创建ShopActivity

       ShopActivity是用来展示装备信息的，当单击ShopActivity的装备时，会调回MainActivity并将装备信息 回传给MainActivity。ShopActivity的具体代码如下：

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import org.w3c.dom.Text;

import cn.itcast.domain.ItemInfo;

/**
* Created by 18376 on 2017/3/25.
*/

public class ShopActivity extends Activity implements View.OnClickListener {
private ItemInfo itemInfo;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shop);
itemInfo=new ItemInfo("金剑",100,20,20);
findViewById(R.id.r1).setOnClickListener(this);
TextView mLifeTV = (TextView)findViewById(R.id.tv_life);
TextView mNameTV =(TextView)findViewById(R.id.tv_name);
TextView mSpeedTV =(TextView)findViewById(R.id.tv_speed);
TextView mAttackTV =(TextView)findViewById(R.id.tv_attack);
mLifeTV.setText("生命值"+itemInfo.getLife());
mNameTV.setText(itemInfo.getName()+"");
mSpeedTV.setText("敏捷度"+itemInfo.getSpeed());
mAttackTV.setText("攻击力"+itemInfo.getAcctack());
}

@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.r1:
Intent intent = new Intent();
intent.putExtra("equipment",itemInfo);
setResult(1,intent);
finish();
break;
}
}
}

​编写界面交互代码（MainActivity)

   

     MainActivity主要用于响应按钮的点击事件，并返回的装备信息显示到指定的L控件中，具体代码如下所示：

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

import cn.itcast.domain.ItemInfo;

public class MainActivity extends AppCompatActivity {
private ProgressBar mProgressBar1;
private ProgressBar mProgressBar2;
private ProgressBar mProgressBar3;
private TextView mLifeTV;
private TextView mAttackTV;
private TextView mSpeedTV;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLifeTV = (TextView) findViewById(R.id.tv_life_progress);
mAttackTV = (TextView) findViewById(R.id.tv_attack_progress);
mSpeedTV = (TextView) findViewById(R.id.tv_speed_progress);
initProgress();
}

private void initProgress() {
mProgressBar1 = (ProgressBar) findViewById(R.id.progressBar1);
mProgressBar2 = (ProgressBar) findViewById(R.id.progressBar2);
mProgressBar3 = (ProgressBar) findViewById(R.id.progressBar3);
mProgressBar1.setMax(1000);
mProgressBar2.setMax(1000);
mProgressBar3.setMax(1000);
}

public void click(View view) {
Intent intent = new Intent(this, ShopActivity.class);
startActivityForResult(intent, 1);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (data != null) {
if (resultCode == 1) {
if (requestCode == 1) {
ItemInfo info = (ItemInfo) data.getSerializableExtra("equipment");
updateProgress(info);
}
}
}
}
private void updateProgress(ItemInfo info){
int progress1=mProgressBar1.getProgress();
int progress2=mProgressBar2.getProgress();
int progress3=mProgressBar3.getProgress();
mProgressBar1.setProgress(progress1+info.getLife());
mProgressBar2.setProgress(progress2+info.getAcctack());
mProgressBar3.setProgress(progress3+info.getSpeed());
mLifeTV.setText(mProgressBar1.getProgress()+"");
mAttackTV.setText(mProgressBar2.getProgress()+"");
mSpeedTV.setText(mProgressBar3.getProgress()+"");
}
}
清单文件的配置

使用Activity是时需要在清单文件中配置，具体代码如下：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.edu.bzu.equipment" >    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme" >        <activity android:name=".MainActivity"            android:label="@string/app_name">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity android:name=".ShopActivity">        </activity>    </application></manifest>    

8.运行成功！