我的Android进阶之旅------>Android关于Activity管理的一个简单封装

怎样管理当前的执行Activity栈，怎样彻底退出程序。本文封装了一个Activity管理类，能够方便随时退出程序。

import java.util.Stack;

import android.app.Activity;
import android.content.Context;

public class ActivityManager {
	private static Stack<Activity> activityStack;
	private static ActivityManager instance;
	static {
		instance = new ActivityManager();
	}

	public static ActivityManager getInstance() {
		return instance;
	}

	/**
	 * 加入指定Activity到堆栈
	*/
	public void addActivity(Activity activity){
		if(activityStack==null){
			activityStack=new Stack<Activity>();
		}
		activityStack.add(activity);
	}
	/**
	 * 获取当前Activity
	 */
	public Activity currentActivity(){
		Activity activity=activityStack.lastElement();
		return activity;
	}
	/**
	 * 结束当前Activity
	 */
	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Class的Activity
	 */
	public void finishActivity(Class<?> cls){
		for (Activity activity : activityStack) {
			if(activity.getClass().equals(cls) ){
				finishActivity(activity);
				return;
			}
		}
	}

	/**
	 * 结束所有的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();
			android.app.ActivityManager activityMgr= (android.app.ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
			activityMgr.restartPackage(context.getPackageName());
			System.exit(0);
		} catch (Exception e) {	}
	}
}

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以下从http://www.oschina.net/code/snippet_191986_11730中取来一段代码，封装了Activity全屏、隐藏系统标题栏、设置屏幕方向、Activity跳转等功能。代码例如以下：

import java.util.Map;

import org.apache.http.NameValuePair;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;

/**
 * </br><b>name : </b>        ActivityUtil
 * </br><b>description :</b>Activity特性辅助工具
 * </br>@author :             桥下一粒砂
 * </br><b>e-mail : </b>  chenyoca@gmail.com
 * </br><b>weibo : </b>       @桥下一粒砂
 * </br><b>date : </b>        2012-7-8
 *
 */
public class ActivityUtil {

    /**
     * </br><b>title : </b>       设置Activity全屏显示
     * </br><b>description :</b>设置Activity全屏显示。

* @param activity Activity引用
     * @param isFull true为全屏，false为非全屏
     */
    public static void setFullScreen(Activity activity,boolean isFull){
        Window window = activity.getWindow();
        WindowManager.LayoutParams params = window.getAttributes();
        if (isFull) {
            params.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;
            window.setAttributes(params);
            window.addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
        } else {
            params.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN);
            window.setAttributes(params);
            window.clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
        }
    }

    /**
     * </br><b>title : </b>       隐藏系统标题栏
     * </br><b>description :</b>隐藏Activity的系统默认标题栏
     * @param activity Activity对象
     */
    public static void hideTitleBar(Activity activity){
        activity.requestWindowFeature(Window.FEATURE_NO_TITLE);
    }

    /**
     * </br><b>title : </b>       设置Activity的显示方向为垂直方向
     * </br><b>description :</b>强制设置Actiity的显示方向为垂直方向。

* @param activity Activity对象
     */
    public static void setScreenVertical(Activity activity){
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

    /**
     * </br><b>title : </b>       设置Activity的显示方向为横向
     * </br><b>description :</b>强制设置Actiity的显示方向为横向。
     * @param activity Activity对象
     */
    public static void setScreenHorizontal(Activity activity){
        activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
    }

    /**
     * </br><b>title : </b>     隐藏软件输入法
     * </br><b>description :</b>隐藏软件输入法
     * </br><b>time :</b>       2012-7-12 下午7:20:00
     * @param activity
     */
    public static void hideSoftInput(Activity activity){
        activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
    }

    /**
     * </br><b>title : </b>       使UI适配输入法
     * </br><b>description :</b>使UI适配输入法
     * </br><b>time :</b>     2012-7-17 下午10:21:26
     * @param activity
     */
    public static void adjustSoftInput(Activity activity) {
        activity.getWindow().setSoftInputMode(
                WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
    }

    /**
     * </br><b>title : </b>       跳转到某个Activity。
     * </br><b>description :</b>跳转到某个Activity
     * </br><b>time :</b>     2012-7-8 下午3:20:00
     * @param activity          本Activity
     * @param targetActivity    目标Activity的Class
     */
    public static void switchTo(Activity activity,Class<?

extends Activity> targetActivity){
        switchTo(activity, new Intent(activity,targetActivity));
    }

    /**
     * </br><b>title : </b>       依据给定的Intent进行Activity跳转
     * </br><b>description :</b>依据给定的Intent进行Activity跳转
     * </br><b>time :</b>     2012-7-8 下午3:22:23
     * @param activity          Activity对象
     * @param intent            要传递的Intent对象
     */
    public static void switchTo(Activity activity,Intent intent){
        activity.startActivity(intent);
    }

    /**
     * </br><b>title : </b>       带參数进行Activity跳转
     * </br><b>description :</b>带參数进行Activity跳转
     * </br><b>time :</b>     2012-7-8 下午3:24:54
     * @param activity          Activity对象
     * @param targetActivity    目标Activity的Class
     * @param params            跳转所带的參数
     */
    public static void switchTo(Activity activity,Class<?

extends Activity> targetActivity,Map<String,Object> params){
        if( null != params ){
            Intent intent = new Intent(activity,targetActivity);
            for(Map.Entry<String, Object> entry : params.entrySet()){
                setValueToIntent(intent, entry.getKey(), entry.getValue());
            }
            switchTo(activity, intent);
        }
    }

    /**
     * </br><b>title : </b>       带參数进行Activity跳转
     * </br><b>description :</b>带參数进行Activity跳转
     * </br><b>time :</b>     2012-7-17 下午10:22:58
     * @param activity
     * @param target
     * @param params
     */
    public static void switchTo(Activity activity,Class<? extends Activity> target,NameValuePair...params){
        if( null != params ){
            Intent intent = new Intent(activity,target);
            for(NameValuePair param : params){
                setValueToIntent(intent, param.getName(), param.getValue());
            }
            switchTo(activity, intent);
        }
    }

    /**
     * </br><b>title : </b>       显示Toast消息。
     * </br><b>description :</b>显示Toast消息，并保证执行在UI线程中
     * </br><b>time :</b>     2012-7-10 下午08:36:02
     * @param activity
     * @param message
     */
    public static void toastShow(final Activity activity,final String message){
        activity.runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(activity, message, Toast.LENGTH_SHORT).show();
            }
        });
    }

    /**
     * </br><b>title : </b>       将值设置到Intent里
     * </br><b>description :</b>将值设置到Intent里
     * </br><b>time :</b>     2012-7-8 下午3:31:17
     * @param intent            Inent对象
     * @param key               Key
     * @param val               Value
     */
    public static void setValueToIntent(Intent intent, String key, Object val) {
        if (val instanceof Boolean)
            intent.putExtra(key, (Boolean) val);
        else if (val instanceof Boolean[])
            intent.putExtra(key, (Boolean[]) val);
        else if (val instanceof String)
            intent.putExtra(key, (String) val);
        else if (val instanceof String[])
            intent.putExtra(key, (String[]) val);
        else if (val instanceof Integer)
            intent.putExtra(key, (Integer) val);
        else if (val instanceof Integer[])
            intent.putExtra(key, (Integer[]) val);
        else if (val instanceof Long)
            intent.putExtra(key, (Long) val);
        else if (val instanceof Long[])
            intent.putExtra(key, (Long[]) val);
        else if (val instanceof Double)
            intent.putExtra(key, (Double) val);
        else if (val instanceof Double[])
            intent.putExtra(key, (Double[]) val);
        else if (val instanceof Float)
            intent.putExtra(key, (Float) val);
        else if (val instanceof Float[])
            intent.putExtra(key, (Float[]) val);
    }

}

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  作者：欧阳鹏  欢迎转载。与人分享是进步的源泉！

  转载请保留原文地址：http://blog.csdn.net/ouyang_peng

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