有些事情做多了就有了通用方法,对于android中activity的管理总结,基本逻辑:用Stack(堆栈)管理activity实例,在堆栈里添加,结束,获取Activity,到程序退出时结束所有activity非常方便。
实现与优化,一个应用程序Activity管理类:AppManager。一个应用程序Activity的基类Baseactivity继承activity,生命周期函数里面调用APPManager的方法。以后所有的activity都可以继承Baseactivity。
代码:AppManager
package net.oschina.app; import java.util.Stack; import android.app.Activity; import android.app.ActivityManager; import android.content.Context; /** * 应用程序Activity管理类:用于Activity管理和应用程序退出 * @version 1.0 */ public class AppManager { private static Stack<Activity> activityStack; private static AppManager instance; private AppManager(){} /** * 单一实例 */ public static AppManager getAppManager(){ if(instance==null){ instance=new AppManager(); } return instance; } /** * 添加Activity到堆栈 */ public void addActivity(Activity activity){ if(activityStack==null){ activityStack=new Stack<Activity>(); } activityStack.add(activity); } /** * 获取当前Activity(堆栈中最后一个压入的) */ public Activity currentActivity(){ Activity activity=activityStack.lastElement(); return activity; } /** * 结束当前Activity(堆栈中最后一个压入的) */ public void finishActivity(){ Activity activity=activityStack.lastElement(); finishActivity(activity); } /** * 结束指定的Activity */ public void finishActivity(Activity activity){ if(activity!=null){ activityStack.remove(activity); activity.finish(); activity=null; } } /** * 结束指定类名的Activity */ public void finishActivity(Class<?> cls){ for (Activity activity : activityStack) { if(activity.getClass().equals(cls) ){ finishActivity(activity); } } } /** * 结束所有Activity */ public void finishAllActivity(){ for (int i = 0, size = activityStack.size(); i < size; i++){ if (null != activityStack.get(i)){ activityStack.get(i).finish(); } } activityStack.clear(); } /** * 退出应用程序 */ public void AppExit(Context context) { try { finishAllActivity(); ActivityManager activityMgr= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); activityMgr.restartPackage(context.getPackageName()); System.exit(0); } catch (Exception e) { } } }
BaseActivity:
package net.oschina.app.ui; import net.oschina.app.AppManager; import android.app.Activity; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; /** * 应用程序Activity的基类 * * @version 1.0 * @created 2012-9-18 */ public class BaseActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); allowFullScreen = true; // 添加Activity到堆栈 AppManager.getAppManager().addActivity(this); } @Override protected void onDestroy() { super.onDestroy(); // 结束Activity&从堆栈中移除 AppManager.getAppManager().finishActivity(this); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && view != null) { view.onKeyDown(keyCode, event); if (!allowDestroy) { return false; } } return super.onKeyDown(keyCode, event); } }
时间: 2024-11-03 10:39:05