Android 架构【转】

import java.util.ArrayList;

import java.util.List;

 

import android.app.Activity;

import android.app.Application;

 

 

/**

 * 应用配置类

 * @author leehongee

 *

 */

public class AppManager extends Application{

    /**打开的activity**/

    private List<Activity> activities = new ArrayList<Activity>();

    /**应用实例**/

    private static AppManager instance;

    /**

     *  获得实例

     * @return

     */

    public static AppManager getInstance(){

        return instance;

    }

    /**

     * 新建了一个activity

     * @param activity

     */

    public void addActivity(Activity activity){

        activities.add(activity);

    }  

    /**

     *  结束指定的Activity

     * @param activity

     */

    public void finishActivity(Activity activity){

        if (activity!=null) {

            this.activities.remove(activity);

            activity.finish();

            activity = null;

        }

    }  

    /**

     * 应用退出，结束所有的activity

     */

    public void exit(){

        for (Activity activity : activities) {

            if (activity!=null) {

                activity.finish();

            }

        }

        System.exit(0);

    }      

     

    @Override

    public void onCreate() {

            instance = this;          

    }      

}

 然后我写了一个BaseActivity，以后的Activity 都继承这个Activity，如下

?

import android.app.Activity;

import android.os.Bundle;

import android.os.StrictMode;

 

/**

 * 基本Activity

 * @author leehongee

 * @date 2013-1-26 下午6:24:47

 * @version

 */

public class BaseActivity extends Activity{

     

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        //添加到Activity集合

        AppManager.getInstance().addActivity(this);

        //手机端SDK>10，即 android 2.3.x之后在主线程中访问网络需要加入如下代码

        if (AppConfig.getSDKVersionNumber()>10) {

            // 详见StrictMode文档

            StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()

                    .detectDiskReads()

                    .detectDiskWrites()

                    .detectNetwork()   // or .detectAll() for all detectable problems

                    .penaltyLog()

                    .build());

            StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()

                    .detectLeakedSqlLiteObjects()

                    .detectLeakedClosableObjects()

                    .penaltyLog()

                    .penaltyDeath()

                    .build());

        }

    }

     

    @Override

    public void onBackPressed() {

        super.onBackPressed();

        onDestroy();

    }

     

    @Override

    protected void onDestroy() {

        super.onDestroy();

        //结束Activity&从集合中移除

        AppManager.getInstance().finishActivity(this);

    }

 

}