在使用新浪微博APP時,能發現在微博發佈頁面進入圖庫選擇圖片後,會回到微博發佈頁面並帶回了圖片選擇頁面的圖片信息。由於這種需求十分常見,因此,Android提供了一個startActivityForResult()方法,來實現回傳數據。
佈局文件
<?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"
android:orientation="vertical"
android:gravity="center"
tools:context="com.example.lenovo.equipselect.MainActivity">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="5dp"
android:layout_marginTop="30dp"
android:src="@drawable/p1"/>
<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,快給小寶寶購買裝備吧" />
<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">
<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_gravity="center"
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="攻擊力:"
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_attack_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"
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:drawablePadding="3dp"
android:drawableRight="@android:drawable/ic_menu_add"
android:onClick="click"
android:text="小寶寶購買裝備"
android:textSize="14sp"/>
</RelativeLayout>
</LinearLayout>
裝備界面
<?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:background="@android:drawable/ic_menu_info_details"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"/>
<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="商品名稱"/>
<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:textSize="13sp"
android:text="生命值"/>
<TextView
android:id="@+id/tv_attack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="13sp"
android:text="攻擊力"/>
<TextView
android:id="@+id/tv_speed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="13sp"
android:text="速度"/>
</LinearLayout>
</RelativeLayout>
package com.example.lenovo.domain;
import java.io.Serializable;
/**
* Created by lenovo on 2017/5/8.
*/
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 toSring(){
return "[name="+name+",acctack="+acctack+",life="+life+",speed="+speed+"]";
}
}
創建ShopActivity類
package com.example.lenovo.equipselect;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import com.example.lenovo.domain.ItemInfo;
/**
* Created by lenovo on 2017/5/8.
*/
public class ShopActivity extends AppCompatActivity implements View.OnClickListener {
private ItemInfo itemInfo;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shop);
itemInfo=new ItemInfo("金劍",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);
//TextView顯示字符串,這裏傳入int值編譯不會報錯,運行會出錯
mLifeTV.setText("生命值+"+itemInfo.getLife());
mNameTV.setText(itemInfo.getName()+"");
mSpeedTV.setText("敏捷度+"+itemInfo.getSpeed());
mAttackTV.setText("攻擊力+"+itemInfo.getAcctack());
}
@Override
public void onClick(View v){
//TODO Auto-genrated method stub
switch(v.getId()){
case R.id.r1:
Intent intent=new Intent();
intent.putExtra("equipment",itemInfo);
setResult(1,intent);
finish();
break;
}
}
}
編寫界面交互代碼
package com.example.lenovo.equipselect;
import android.app.Activity;
import android.content.ClipData;
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 com.example.lenovo.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();//初始化進度條
}
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);
}
//開啓新的activity並且想獲取她的返回值
public void click(View view){
Intent intent=new Intent(this,ShopActivity.class);
startActivityForResult(intent,1);//返回請求結果,請求碼爲1
}
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data){
super.onActivityResult(requestCode,resultCode,data);
if(data!=null){
//判斷結果碼是否等於1,等於1爲寶寶添加裝備
if(resultCode==1){
if(requestCode==1){
ItemInfo info=(ItemInfo)data.getSerializableExtra("equipment");//更新ProgressBar的值
updateProgress(info);
}
}
}
}
//更新ProgressBar的值
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()+"");
}
}
配置清單文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.lenovo.equipselect">
<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">
<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>
添加一個<activity>結點運行程序
點擊購買裝備
選擇後
這樣數據就傳遞回來了。