android getApplication()使用

?

package com.hyzing;import android.app.Application;public class MySystemAppcation extends Application{private int curIndex;public int getCurIndex() {return curIndex;}public void setCurIndex(int curIndex) {this.curIndex = curIndex;}@Overridepublic void onCreate() {super.onCreate();}@Overridepublic void onTerminate() {super.onTerminate();}}

package com.hyzing;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.util.Log;public class SystemtestActivity extends Activity {@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//setContentView(R.layout.main);MySystemAppcation application = (MySystemAppcation) this.getApplication();System.out.println("++++++++++++++"+application);Log.i("data", "===============" + application.getCurIndex());application.setCurIndex(5);Intent intent = new Intent();        Bundle bundle = new Bundle();        bundle.putString("checkIn", "0");        bundle.putBoolean("managerUser", true);        intent.putExtras(bundle);        intent.setClass(SystemtestActivity.this, PrintActivity.class);        startActivity(intent);}}

package com.hyzing;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.util.Log;public class PrintActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);MySystemAppcation application = (MySystemAppcation) this.getApplication();Log.i("data", "" + application.getCurIndex());application.setCurIndex(6);Intent intent = new Intent();        Bundle bundle = new Bundle();        bundle.putString("checkIn", "0");        bundle.putBoolean("managerUser", true);        intent.putExtras(bundle);        intent.setClass(PrintActivity.this, PrintAgainActivity.class);        startActivity(intent);}}

package com.hyzing;import android.app.Activity;import android.os.Bundle;import android.util.Log;public class PrintAgainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);final MySystemAppcation application = (MySystemAppcation) this.getApplication();Log.i("data", "" + application.getCurIndex());}}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.hyzing"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk android:minSdkVersion="15" />    <application android:name=".MySystemAppcation"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:name=".SystemtestActivity"            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=".PrintActivity"            android:label="@string/app_name" >                    </activity>        <activity            android:name=".PrintAgainActivity"            android:label="@string/app_name" >                    </activity>            </application></manifest>