如何管理当前的运行Activity栈，如何彻底退出程序，本文封装了一个Activity管理类，可以方便随时退出程序。
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; } /** * 添加指定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; } } } /** * 结束全部的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) { } }}==================================================================================================
下面从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。代码如下：
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> [email protected] * </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> 根据给定的Intent进行Activity跳转 * </br><b>description :</b>根据给定的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> 带参数进行Activity跳转 * </br><b>description :</b>带参数进行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 跳转所带的参数 */ 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> 带参数进行Activity跳转 * </br><b>description :</b>带参数进行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，并保证运行在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！
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