在Android中声明全局变量

Declaring global variables in android

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我浏览了很多页，但无法正确理解如何声明一个类来包含全局变量，以及它在清单文件中的声明(最重要的是，需要对它进行额外的关注)

班级

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global file
/**
*
*/
package com.furniture;

/**
* @author sanketh
*
*/
public class Gloabal extends ap{
public String refer="";
public int set=0;
public String getData(){
return this.refer;
}

public void setData(String d,int i){
this.refer=d;
set=i;
}
}

显示

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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.furniture"
android:versionCode="1"
android:versionName="1.0">

<uses-sdk
android:minSdkVersion="12"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.SEND_SMS"/>
<uses-permission android:name="android.permission.RECEIVE_SMS"/>

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:name=".Gloabal">

<activity
android:name="com.furniture.login"
android:label="@string/app_name">
<intent-filter>

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</activity>
</activity>
</activity>
</activity>

<receiver android:name=".smsreciever">
<intent-filter>

</intent-filter>
</receiver>

</application>
</manifest>
somefile
package com.furniture;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.util.Log;
import android.widget.Toast;

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public class smsreciever extends BroadcastReceiver
{

public String value;
@Override
public void onReceive(Context context, Intent intent)
{

//---get the SMS message passed in---
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str ="";
if (bundle != null)
{
//---retrieve the SMS message received---
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++){
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
str +="SMS from" + msgs[i].getOriginatingAddress();
str +=" :";
str += msgs[i].getMessageBody().toString();
str +="
";
}
//---display the new SMS message---
// Intent i1=new Intent();
//((Gloabal)this.get).setData(str);
// Gloabal g1=new Gloabal();
Global g = (Global)getApplication();
int data=g.getData();

Log.v("sanketh","smsreciver value of str:"+str);
int a=1;
g1.setData(str,a);
Toast.makeText(context, str, Toast.LENGTH_SHORT).show();

}
}
}

我想在这里设置数据…

1	Global g = (Global)getApplication(); // this line gives error for get application

相关讨论

除了使用应用程序创建全局变量外，还可以创建一个常规类来保存变量。现在，我正在使用这个：

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public class GlobalVar {

public String getGlobalVar1() {
return GlobalVar1;
}

public void setGlobalVar1(String GlobalVar1) {
this.GlobalVar1 = GlobalVar1;
}

private String GlobalVar1 ="";

static {
instance = new GlobalVar();

}

private GlobalVar() {
}

public static GlobalVar getInstance() {
return GlobalVar.instance;
}
}

为Globalvar1设置新值：

1	GlobalVar.getInstance().setGlobalVar1(value);

为了获得价值：

1	GlobalVar.getInstance().getGlobalVar1;

公共类GlobalState扩展应用程序{

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private int gameScore = 0;

public int getGameScore() {
return gameScore;
}

public void setGameScore(int gameScore) {
this.gameScore = gameScore;
}

public void incrementScore(){
gameScore++;
}

清单文件

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<uses-sdk android:minSdkVersion="14" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:name="GlobalState">


</application>

活动中的用法

1	GlobalState state = ((GlobalState) getApplicationContext());