Android的Activity管理

可能你会遇到这种场景：

1. 界面A–>界面B–>…–>界面N，停留在界面N的时候，提交数据，才会把界面N之前的界面A、B… finish掉；
2. 登录、注册，最后的提交后，直接进入App主界面，这个时候就要把注册界面finish掉；
3. 等等

import java.util.LinkedList;  
import java.util.List;  
  
import android.app.Activity;  
import android.app.Application;  
  
/**  * activity管理 *  * @author Liujy */  
 * activity管理
 * 
 * @author Liujy
 */
public class KYActivityMannger extends Application {  
    private List<Activity> mList = new LinkedList<Activity>();  
    private List<Activity> mLogoutList = new LinkedList<Activity>();  
    private static KYActivityMannger instance;  
  
    private KYActivityMannger() {  
    }  
  
    public synchronized static KYActivityMannger getInstance() {  
        if (null == instance) {  
            instance = new KYActivityMannger();  
        }  
        return instance;  
    }  
  
    /**      *  add Activity save mList      * @param activity      */  
     *  add Activity save mList 
     * @param activity 
     */
    public void addActivity(Activity activity) {  
        mList.add(activity);  
    }  
  
    /**      *  add Activity save mLogoutList      * @param activity      */  
     *  add Activity save mLogoutList 
     * @param activity 
     */
    public void addLogoutActivity(Activity activity) {  
        mLogoutList.add(activity);  
    }
  
    /**      * 退出      */  
     * 退出 
     */
    public void exit() {  
        try {  
            for (Activity activity : mList) {  
                if (activity != null)  
                    activity.finish();  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        } finally {  
            android.os.Process.killProcess(android.os.Process.myPid());  
            System.exit(0);  
        }  
    }  
  
    /**      * 注销      */  
     * 注销 
     */
    public void logout() {  
        try {  
            for (Activity activity : mLogoutList) {  
                if (activity != null)  
                    activity.finish();  
            }  
        } catch (Exception e) {  
            e.printStackTrace();  
        } finally {  
            System.gc();  
        }  
    }  
  
    public void onLowMemory() {  
        super.onLowMemory();  
        System.gc();  
    }  
}

在需要对Activity管理的onCreate(）添加：

KYActivityMannger.getInstance().addActivity(this);  
KYActivityMannger.getInstance().addLogoutActivity(this);

调用

// 注销不退出App
KYActivityMannger.getInstance().logout();
// 退出并退出App
KYActivityMannger.getInstance().exit();