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关于android的装备选择案例

2017-05-23 16:50 429 查看
装备选择案例是来演示Activity 回传数据,本案例实现了购买装备增加生命值的功能实现案例具体步骤如下:

1.创建一个名为“select”的工程,将包名修改为cn.edu.bzu.select,首先创建装备选择对应的布局文件(activity_main.xml),如下所示:

   其中控件ProgressBar(进度条),它是用来显示小新的生命值.攻击力和敏捷度的,ProgressBar通常用于访问网络展示Loading对话框以及下载文件时显示的进度,setMax()方法:设置进度条的最大值;setProgress()方法:设置当前进度;getProgress()方法:获取当前进度。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
tools:context="cn.edu.bzu.select.MainActivity"
android:weightSum="1">

<ImageView
android:id="@+id/pet_imgv"
android:layout_width="89dp"
android:layout_height="57dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp"
android:src="@drawable/touxiang"
android:layout_weight="0.1" />

<TextView
android:id="@+id/pet_dialog_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="25dp"
android:gravity="center"
android:text="主人,快给小新购买装备吧" />

<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginBottom="20dp">
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"[/b]>
<TextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="生命值"
android:textColor="@android:color/black"
android:textSize="14sp" />

<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="2"/>

<TextView
android:id="@+id/tv_life_progress"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="0"
android:gravity="center"
android:textColor="#000000"
/>
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="攻击力"
android:textColor="@android:color/black"
android:textSize="14sp" />
<ProgressBar
android:id="@+id/progressBar2"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="2"/>

<TextView
android:id="@+id/tv_acctack_progress"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="0"
android:gravity="center"
android:textColor="#000000" />
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="敏捷"
android:textColor="@android:color/black"
android:textSize="14sp" />
<ProgressBar
android:id="@+id/progressBar3"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="2"/>

<TextView
android:id="@+id/tv_speed_progress"
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="0"
android:gravity="center"
android:textColor="#000000" />
</TableRow>
</TableLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/btn_baby"
android:drawablePadding="3dp"
android:onClick="click"
android:text="小新购买装备"
android:textSize="14sp" />
</RelativeLayout>
</LinearLayout>




2.创建装备界面activity_shop.xml,该界面是来显示装备的,布局文件如下:

<?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">

<View
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true" />

<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:laoyut_marinLeft="60dp"
android:text="商品名称" />

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="20dp"
android:layout_marginStart="20dp"
android:layout_marginTop="10dp"
android:layout_toEndOf="@+id/tv_name"
android:layout_toRightOf="@+id/tv_name"
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_acctack"
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>




3.创建一个cn.edu.bzu.domain包,在里面创建一个ItemInfo类,用于封装装备信息,具体如下:

package cn.edu.bzu.select.cn.edu.bzu.domain;

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="+life+"]";
}
}

4.创建ShopActivity,ShopActivity是用来展示装备信息的,当单机ShopActivity的装备时,会调回MainActivity并将装备信息回传给MainActivity,具体如下:

package cn.edu.bzu.select.cn.edu.bzu.domain;

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

import cn.edu.bzu.select.R;

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, 30, 30);
findViewById(R.id.rl).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 mAcctackTV = (TextView) findViewById(R.id.tv_acctack);
mLifeTV.setText("生命值+"+itemInfo.getLife());
mNameTV.setText(itemInfo.getName()+"");
mSpeedTV.setText("敏捷度+"+itemInfo.getSpeed());
mAcctackTV.setText("攻击力+"+itemInfo.getAcctack());
}

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

}
}

  其中setReult()方法的作用是让当前Activity返回它的调用者,也可以理解为让ShopActivity返回到MainActivity。

5.编写界面交互代码(MainActivity),MainActivity 主要用于相应按钮的点击事件,并将返回的装备信息显示到指定的ListView控件中,具体如下:

package cn.edu.bzu.select;

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

import cn.edu.bzu.select.cn.edu.bzu.domain.ItemInfo;
import cn.edu.bzu.select.cn.edu.bzu.domain.ShopActivity;

public class MainActivity extends AppCompatActivity {

private TextView mLifeTV;
private TextView mAcctackTV;
private TextView mSpeedTV;
private ProgressBar mProgressBar1;
private ProgressBar mProgressBar2;
private ProgressBar mProgressBar3;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLifeTV=(TextView)findViewById(R.id.tv_life_progress);
mAcctackTV=(TextView)findViewById(R.id.tv_acctack_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);
}
protected void onActivityResult(int requestCode,int resultCode,Intent data){
super.onActivityResult(requestCode,resultCode,data);
if (data!=null){
if(resultCode==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()+"");
mAcctackTV.setText(mProgressBar2.getProgress()+"");
mSpeedTV.setText(mProgressBar3.getProgress()+"");
}
}

最后运行程序选择装备。
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