注意：有些功能是需要权限的，在这里并没有写出来，在程序运行中，根据程序报的错误，添加相应的权限即可，里面的具体里面可能有一些小细节，没有明确的写出来，具体的需要在程序中自己调试，解决。

　　　这个总结涵盖了Android的一些核心的内容，如四大组建Service、ContentProvider、BroadCastReceiver、Activity，而且四大组建都必须在清单文件中注册。
　　  还涉及了Android手机底层的一些功能，如读取联系人、短信等。还有一些看似牛别点技术，什么短息拦截，电话拦截，黑名单拦截，甚至电话窃听、短信窃取（这里只是技术的分享，切不可做违法乱纪之事，否则后果自负）都是可以实现的，只需要在功能中稍加改动就很容实现想要的功能。

1.获取版本号
    思路：1.获取包管理器PackageManager2.通过包管理器获取包信息PackageInfo3.通过包信息获取版本号 packageInfo.VersionNamePackeageManager p=getPackageMamager();PackageInfo info=p.getPackageInfo(getPackageName(),0)String version=info.versionName;//获取版本号

2.获取网络的连接状态(ConnectivityManager)1.获取连接管理器(ConnectivityManager)2.通过连接管理器获取网络状态信息的对象(NetworkInfo)ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo networkInfo = manager.getActiveNetworkInfo();if(networkInfo==null){//没有网络return false;}else if(networkInfo.getType()==ConnectivityManager.TYPE_MOBILE){//手机2g/3g网络return true;}else if(networkInfo.getType()==ConnectivityManager.TYPE_WIFI){//wifi网络return true;}else{return false;}3.httpClient设置连接超时时间
    client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);4.textView设置跑马灯效果
    第一种：android:ellipsize="marquee"android:singleLine="true"android:marqueeRepeatLimit="marquee_forever"setSelected(true);第二种方法是自定义textView 标签名称是自定义类的全类名android:ellipsize="marquee"android:singleLine="true"android:marqueeRepeatLimit="marquee_forever"自定义一个类继承子TextView方法，重写isFocused()方法，把返回值置为true5.获取sim卡的串号
    TelephonyManager =getSystemService(Context.Telephony_service)pm.getSimSerialerNumber();6.安装sdcard中的apk文件// 跳转到安装程序的界面Intent intent = new Intent();intent.setAction("android.intent.action.VIEW");intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");startActivity(intent);7.自定义对话框，去掉黑边
    View view = getLayoutInflater().inflate(R.layout.safe_dialog_second,null);AlertDialog.Builder builder = new AlertDialog.Builder(this);AlertDialog dialog = builder.create();dialog.show();Window window = dialog.getWindow();//通过 window对象弹出的对话框，输入法无法自动弹出，通过下面的设置解决该问题问题
    window.clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);window.setContentView(view);8.ListView分页加载1.listview.addFootView(view);2.sqlite支持分页查找的功能db.query("blackNumber", null, null, null, null, null, null, startId+","+block)3.先查找总共有多少条记录，定义开始查找的索引位置，每次加载多少条记录，以及定义一个标记是否加载数据4.给listview设置滑动事件// 每次滑动都会调用public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {// 是否滑动到了最后if (firstVisibleItem + visibleItemCount == totalItemCount) {Log.i("onScroll", "滑动到了最后。。");if (!isloading) {// 如果没有加载数据//是否滑动到了最后一页if (totalItemCount < total) {// 加载数据isloading = true;// 添加Footer
                    lv_black.addFooterView(footView);// 加载数据
                    loadData(totalItemCount);}}}}9.ListView的优化1.定义一个静态类，定义控件的变量2.在适配器中的getView()方法通过listview自身的缓存功能public View getView(final int position, View convertView,ViewGroup parent) {ViewHolder holder = null;View view;if (convertView != null) {view = convertView;holder = (ViewHolder) convertView.getTag();// 直接从缓存里面取数据} else {holder = new ViewHolder();view = getLayoutInflater().inflate(R.layout.activity_commuicate_lv_item, null);holder.tv_number = (TextView) view.findViewById(R.id.tv_number);view.setTag(holder);// 把数据控件直接缓存起来，不用每次都来查找控件
            }BlackNumberInfo info = infos.get(position);holder.tv_number.setText(info.getNumber());return view;}//listview的优化private static class ViewHolder {TextView tv_number = null;TextView tv_type = null;ImageView img = null;}10.黑名单拦截1.启动一个服务，通过TelephonyManager监听电话的到来状态；TelephonyManager tm = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);tm.listen(new PhoneStateListener() {switch (state) {case TelephonyManager.CALL_STATE_IDLE://电话闲置状态break;case TelephonyManager.CALL_STATE_RINGING://响铃状态// 2.判断来电号码是否是电话黑名单boolean black = dao.isPhoneBlack(incomingNumber);if (black) {//3. 挂断黑名单号码
                endCall(incomingNumber);// 挂断电话，但是还有通话记录，所以通过内容监听者，监听内容的改变，一旦发生改变就删除通话记录Uri uri = Calls.CONTENT_URI;ContentResolver resolver = getContentResolver();// 4.注册内容监听者，监听通话记录,并删除通话记录resolver.registerContentObserver(uri, true,new MyContentObserver(new Handler(),incomingNumber));}break;case TelephonyManager.CALL_STATE_OFFHOOK://接听状态break;}}11.删除通话记录// 通话记录的UriUri uri = Calls.CONTENT_URI;getContentResolver().delete(uri, Calls.NUMBER + "=?",new String[] { inComingNumber });12.挂断电话private void endCall(String incomingNumber) {//通过反射获取服务管理器，因为底层隐藏了该功能，所以只能通过反射获取挂断电话的方法Class<?> clazz = Class.forName("android.os.ServiceManager");Method method = clazz.getMethod("getService", String.class);IBinder inBinder = (IBinder) method.invoke(null,Context.TELEPHONY_SERVICE);ITelephony iTelephony = ITelephony.Stub.asInterface(inBinder);iTelephony.endCall();}注意：挂断电话他还依赖于两个aidl文件（ITelephony.aidl和NeighboringCellInfo.aidl）ITelephony.aidl文件必须在com.android.internal.telephony该包下NeighboringCellInfo.aidl文件必须在android.telephony包下包名不能写错，因为这是系统规定好的关于进程间通信的文件，不能随便乱改13.获取联系人public static List<ContactInfo> getContacts(ContentResolver cr) {//1.首先查询raw_contacts表中联系人的id号Cursor cursor = cr.query(Uri.parse("content://com.android.contacts/raw_contacts"),new String[] { "_id" }, null, null, null);List<ContactInfo> Contacts = new ArrayList<ContactInfo>();//2.遍历所有所有联系人的idwhile (cursor.moveToNext()) {int _id = cursor.getInt(0);//3.根据联系人的id,获取联系人的信息，data1代表联系人的信息，mimtype是代表信息的类型，如电话，邮件，姓名等Cursor contacts_cursor = cr.query(Uri.parse("content://com.android.contacts/raw_contacts/"+ _id + "/data"),new String[]{"data1","mimetype"},null,null,null);ContactInfo info = new ContactInfo();while (contacts_cursor.moveToNext()) {String data = contacts_cursor.getString(0);String mimetype = contacts_cursor.getString(1);if ("vnd.android.cursor.item/name".equals(mimetype)) {// 姓名
                    info.setName(data);} else if ("vnd.android.cursor.item/phone_v2".equals(mimetype)) {// 电话
                    info.setNumber(data);}}Contacts.add(info);}return Contacts;}14.订阅开机广播,判断sim卡是否变更1.新建一个类继承自BroadcastReceiver2.注册广播，并订阅开启广播  android.intent.action.BOOT_COMPLETED3.在onReceiv()方法中取出手机sim的串口，在和首选项(sharedpreference)中的值进行配对4.如果不对，就发送短信通知，手机有可能已经丢15.拦截短信到来1.新建一个类继承自BroadcastReceiver2.注册广播，并订阅接收短信广播 android.provider.Telephony.SMS_RECEIVED3.在onReceive()方法中获取短信内容Object[] objects = (Object[]) intent.getExtras().get("pdus");for (Object object : objects) {byte[] sms = (byte[]) object;SmsMessage message = SmsMessage.createFromPdu(sms);//创建一个短信对象String msg_content = message.getDisplayMessageBody();// 获取信息的内容String number = message.getDisplayOriginatingAddress();// 获取发送短信的号码//4.中断广播
                abortBroadcast();}}}16.GPS手机定位//获取定位管理器LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);//注册地理发生改变事件监听器
    locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,new LocationListener() {public void onStatusChanged(String provider,int status, Bundle extras) {}public void onProviderEnabled(String provider) {}public void onProviderDisabled(String provider) {}public void onLocationChanged(Location location) {double longitude = location.getLongitude();// 获取经度值double latitude = location.getLatitude();// 获取纬度
                }});17.远程锁屏1.拦截短信，根据短信的指令判断是否锁屏2.锁屏//安全设备管理器DevicePolicyManager dpm = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);dpm.resetPassword("871405", 0);//设置锁屏密码dpm.lockNow();// 锁屏3.远程锁屏需要管理员权限，所以要激活管理员权限(1)首先要定义一个类继承DeviceAdminReceiver类public class MyAdmin extends DeviceAdminReceiver {}(2)激活管理员//设备安全管理器DevicePolicyManager dpm = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);// 指定要激活的组件ComponentName mDevice = new ComponentName(getApplicationContext(),MyAdmin.class);//判断该应用是否有管理员权限if(!dpm.isAdminActive(mDeviceAdminSample)){Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);// 意图里面携带的数据
            intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,mDevice);intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,"开启后可以锁定屏幕");startActivityForResult(intent, 100);}(3)需要注册广播<receiverandroid:name="liu.li.meng.receiver.MyAdmin"android:permission="android.permission.BIND_DEVICE_ADMIN" ><meta-dataandroid:name="android.app.device_admin"android:resource="@xml/device_admin_sample" /><intent-filter><action android:name="android.app.action.DEVICE_ADMIN_ENABLED" /></intent-filter></receiver>(4)android:resource="@xml/device_admin_sample"依赖一个文件<?xml version="1.0" encoding="utf-8"?><device-admin xmlns:android="http://schemas.android.com/apk/res/android"><uses-policies><limit-password /><watch-login />    <reset-password />重置密码 <force-lock />锁屏<wipe-data />清理数据(恢复出厂设置)</uses-policies></device-admin>18.远程清除数据(恢复出厂设置)1.拦截短信，根据短信的指令判断是否清理数据2.恢复出厂设置(需要管理员权限)//设备安全管理器DevicePolicyManager dpm = (DevicePolicyManager) context.getSystemService(Context.DEVICE_POLICY_SERVICE);dpm.wipeData(0);// 清除数据，恢复出厂设置3.一样需管理员权限，上面的操作都需要进行设置19.播放报警音乐1.拦截短信，根据指令播放播放报警音乐2.播放报请音乐MediaPlayer mediaPlayer = MediaPlayer.create(context,R.raw.shuai);mediaPlayer.setLooping(true);// 循环播放mediaPlayer.setVolume(1.0f, 1.0f);// 设置声音最大，即使手机是静音也是最大音量播放
        mediaPlayer.start();20获取SDCard的可用内存，以及手机内置的可用内存
    String sdcardPath = Environment.getExternalStorageDirectory().getAbsolutePath();getAvailableMemory(sdcardPath);//获取sdcard可用内存String memoryPath = Environment.getDataDirectory().getAbsolutePath();getAvailableMemory(memoryPath);//获取手机可用内存public String getAvailableMemory(String path) {StatFs statFs = new StatFs(path);// 获取可用的内存块int blocks = statFs.getAvailableBlocks();int size = statFs.getBlockSize();// 计算可用的内存空间int avaiableMemory = blocks * size;String dataSize = Formatter.formatFileSize(this, avaiableMemory);//格式化数据return dataSize;}21.获取系统总共运行内存和可用运行内存
    文件读取文件管理器下/proc/meminfo文件；其中第一行就是总共的运行内存，第二行就是可用的运行内存22.获取安装的所有应用public static List<AppInfo> getInstallApp(Context context){List<AppInfo> list=new ArrayList<AppInfo>();PackageManager manager = context.getPackageManager();List<PackageInfo> infos = manager.getInstalledPackages(0);//获取所有安装的应用信息的集合for (PackageInfo info : infos) {String versionName = info.versionName;//获取程序的版本号String packageName = info.packageName;//获取应用程序的包名ApplicationInfo appInfo = info.applicationInfo;//获取应用程序的相关信息Drawable iconDrawable = appInfo.loadIcon(manager);//获取应用程序的图标int uid = appInfo.uid;//获取应用的user idString name = appInfo.loadLabel(manager).toString();//获取应用程序的名字int flags = appInfo.flags;//获取应用的flags标识boolean isUserApp = isUserApp(flags);//判断是否是用户应用还是系统应用boolean isInstallSDCard = isInstallSDCard(flags);//判断应用安装的位置AppInfo appInfos=new AppInfo(versionName, iconDrawable, name, uid, isInstallSDCard, isUserApp, packageName);list.add(appInfos);}return list;}//判断是否是系统应用,还是用户应用public static boolean isUserApp(int flags) {if ((flags & ApplicationInfo.FLAG_SYSTEM) == 0) {//用户安装的应用return true;}else{//系统应用return false;}}// 判断安装的位置public static boolean isInstallSDCard(int flags){//安装到了手机内存if((flags& ApplicationInfo.FLAG_EXTERNAL_STORAGE)==0){return false;}else{//sd卡return true;}}23.ListView分栏显示系统应用和用户应用1.首先应该是两个集合，分别存放用户的应用和系统的应用2.在实现BaseAdapter类中的getCount()方法应该写成，return userApp.size()+systemApp.size()+2;这里的加2是因为用来标识是系统应用栏目，还是用户应用栏目3.在getItem()方法中修改代码如下：public AppInfo getItem(int position) {if(position==0){return null;}else if(position<=userApp.size()){return userApp.get(position-1);//返回用于安装的应用}else if(position==userApp.size()+1){return null;}else{return systemApp.get(position-(userApp.size()+2));//返回系统安装的应用
            }}4.getView()中的设置如下：public View getView(int position, View convertView, ViewGroup parent) {if (position == 0) {TextView tv = null;if(convertView != null && convertView instanceof TextView){tv = (TextView) convertView;}else{tv = (TextView) getLayoutInflater().inflate(R.layout.list_separator, null);}tv.setText("用户进程("+userApp.size()+")");//用户应用的栏目return tv;} else if (position == userApp.size() + 1) {//系统应用的栏目TextView tv = null;if(convertView != null && convertView instanceof TextView){tv = (TextView) convertView;}else{tv = (TextView) getLayoutInflater().inflate(R.layout.list_separator, null);}tv.setText("系统进程("+systemApp.size()+")");return tv;} else if(position<=userApp.size()){ViewHolder holder = null;View view = null;if (convertView == null || convertView instanceof TextView) {view = getLayoutInflater().inflate(R.layout.activity_app_manager_lv_item, null);holder = new ViewHolder();holder.app_icon = (ImageView) view.findViewById(R.id.app_icon);......view.setTag(holder);} else {view = convertView;holder = (ViewHolder) view.getTag();}AppInfo appInfo = userApp.get(position-1);holder.app_icon.setImageDrawable(appInfo.getIcon());return view;}else{ViewHolder holder = null;View view = null;if (convertView == null || convertView instanceof TextView) {view = getLayoutInflater().inflate(R.layout.activity_app_manager_lv_item, null);holder = new ViewHolder();holder.app_icon = (ImageView) view.findViewById(R.id.app_icon);holder.iv_app_lock = (ImageView) view.findViewById(R.id.iv_app_lock);view.setTag(holder);} else {view = convertView;holder = (ViewHolder) view.getTag();}AppInfo appInfo = systemApp.get(position-(userApp.size()+2));holder.app_icon.setImageDrawable(appInfo.getIcon());......return view;}}}static class ViewHolder {ImageView app_icon;ImageView iv_app_lock;TextView tv_app_name;TextView tv_app_package_name;TextView tv_app_version_name;TextView tv_app_install_location;TextView tv_app_uid;}24.卸载应用
    Intent intent = new Intent();intent.setAction("android.intent.action.DELETE");intent.setData(Uri.parse("package:" + packageName));startActivity(intent);25.启动应用
    PackageManager pm=context.getPackageManager();Intent intent = pm.getLaunchIntentForPackage(packageName);if (intent == null) {Toast.makeText(this, "该应用无法启动", 0).show();return;}startActivity(intent);26.显示应用详情信息
    Intent intent = new Intent();intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");intent.setData(Uri.parse("package:" + packageName));startActivity(intent);27.激活新建短信页面
    Intent intent = new Intent();intent.setAction(Intent.ACTION_SEND);intent.setType("text/plain");intent.putExtra(Intent.EXTRA_TEXT, "我发现了一个好玩的软件，赶紧下载吧www.baidu.com");//短信内容
    startActivity(intent);28.PopupWindow
    View v = getLayoutInflater().inflate(R.layout.app_manager_popup, null);//新建popuwindowPopupWindow pop = new PopupWindow(v, ViewGroup.LayoutParams.WRAP_CONTENT,ViewGroup.LayoutParams.WRAP_CONTENT);// 设置pop获得焦点pop.setFocusable(true);// 必须要设置背景资源，点击别的区域，才会自动消失pop.setBackgroundDrawable(new BitmapDrawable());int[] location = new int[2];//定义一个数组存放view的位置view.getLocationInWindow(location);//获取view在窗口的位置pop.showAtLocation(view, Gravity.LEFT | Gravity.TOP,location[0] + 50, location[1]);// 定义动画AnimationSet set = new AnimationSet(false);// 动画集合AlphaAnimation alpha = new AlphaAnimation(0.3f, 1f);// 透明度改变动画alpha.setDuration(500);// 设置动画的周期时间ScaleAnimation scale = new ScaleAnimation(0f, 1f,// x轴1f, 1f,// y轴Animation.RELATIVE_TO_SELF, 0,// x点Animation.RELATIVE_TO_SELF, 0.5f);// y点scale.setDuration(500);set.addAnimation(alpha);set.addAnimation(scale);v.startAnimation(set);29.给程序加锁或者解锁
    程序锁的原理：就是在Android中有一个任务栈，获取到任务栈的顶部的任务，就是刚才你打开的应用，根据这个原理判断一个应用是否在顶部，就可以判断程序是否加锁了1.应该有一个开关开启一个程序锁的功能，并开启一个程序锁服务2.在服务中实时的监测用户要打开的应用是否加锁，是一个非常耗时的操作，应该开启一个线程;并定义一个标志位使用while(flag)循环，在服务结束的时候就应该置为false3.在应用列表中长按一个应用，进行加锁或者解锁的操作(程序锁数据库的增删操作);如果是解锁操作，需要发送一个广播，通知这个程序已经解锁4.在服务中OnCreate()方法获取按住的应用，查询应用锁数据库，是否是枷锁状态，如果是则解锁(从数据库删除记录)，如果不是就加锁(往数据库添加记录)5.当手机屏幕灭屏的时候,就让线程休眠等待，手机亮屏就唤醒线程，这里需要订阅手机亮屏和灭屏的广播接受者核心代码：new Thread(new Runnable() {public void run() {while (flag) {synchronized (AppLockService.class) {if(isScreenOn){ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);// 获取正在运行的任务栈（最近打开的任务是在最前面）List<RunningTaskInfo> tasks = manager.getRunningTasks(10);// 最新的那个任务栈RunningTaskInfo taskInfo = tasks.get(0);// 最顶端的activityComponentName topActivity = taskInfo.topActivity;final String packageName = topActivity.getPackageName();if (!packageName.equals(tempApp)) {if (isLockApp(packageName)) {Intent intent = new Intent(getApplicationContext(),AppLockEnterPasswordActivity.class);intent.putExtra("packageName", packageName);intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);startActivity(intent);}}}else{try {AppLockService.class.wait(500);} catch (Exception e) {e.printStackTrace();}}}}}}).start();30.进程管理1.获取activityManager管理器ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);2.通过管理器获取正在运行的进程集合manager.getRunningAppProcesses();3.遍历进程集合public static List<TaskInfo> getRunningTask(Context context) {List<TaskInfo> tasks = new ArrayList<TaskInfo>();ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);// 获取所有运行的进程List<RunningAppProcessInfo> runningAppProcesses = am.getRunningAppProcesses();PackageManager pm = context.getPackageManager();boolean flag=true;for (RunningAppProcessInfo proInfo : runningAppProcesses) {// 获取应用的包名String packageName = proInfo.processName;TaskInfo taskInfo = new TaskInfo();taskInfo.setPackageName(packageName);ApplicationInfo applicationInfo=null;try {flag=true;//当一个进程没有应用信息时，就在下面的一句中，出现了异常所以捕捉异常//所以这里用了一个标记，来处理这些特殊的进程applicationInfo = pm.getApplicationInfo(packageName, 0);} catch (Exception e) {flag=false;}if (!flag) {taskInfo.setAppName(packageName);taskInfo.setIcon(context.getResources().getDrawable(R.drawable.ic_launcher));} else {Drawable icon = applicationInfo.loadIcon(pm);taskInfo.setIcon(icon);String name = applicationInfo.loadLabel(pm).toString();taskInfo.setAppName(name);boolean isUserTask = filterApp(applicationInfo);taskInfo.setUserTask(isUserTask);}// 获取应用的占用内存空间int pid = proInfo.pid;int[] pids = new int[] { pid };MemoryInfo[] processMemoryInfo = am.getProcessMemoryInfo(pids);int memory = processMemoryInfo[0].getTotalPrivateDirty() * 1024;String size = Formatter.formatFileSize(context, memory);// 格式化应用的内存// 判断是否是系统应用还是用户应用
            taskInfo.setMemory(size);tasks.add(taskInfo);}return tasks;}//杀死进程
        am.killBackgroundProcesses(taskInfo.getPackageName());31.窗口小部件进行一键清理进程//1.窗口小部件AppWidgetManager widgetManager = AppWidgetManager.getInstance(getApplicationContext());ComponentName provider = new ComponentName(getApplicationContext(),ProcessAppWidget.class);RemoteViews views = new RemoteViews(getPackageName(),R.layout.example_appwidget);widgetManager.updateAppWidget(provider, views);ActivityManager activityManager=(ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);List<RunningAppProcessInfo> list = activityManager.getRunningAppProcesses();views.setTextViewText(R.id.tv_running_task, "正在运行的软件："+list.size()+"个");try {views.setTextViewText(R.id.tv_avail_memory, "可用内存："+getAvailMemory());} catch (Exception e) {e.printStackTrace();}//杀死进程
    kills(list,activityManager);//点击一键清理按钮，重新启动服务，杀死所有正在运行的进程Intent intented=new Intent(this,AppWidgetService.class);PendingIntent pendingIntent=PendingIntent.getService(getApplicationContext(), 200, intented, 0);views.setOnClickPendingIntent(R.id.btn_clear, pendingIntent);//点击手机卫士，启动打开安全卫士的首页Intent intentStart=new Intent(this,MainActivity.class);PendingIntent startMobile=PendingIntent.getActivity(getApplicationContext(), 200, intentStart, 0);views.setOnClickPendingIntent(R.id.tv_mobilesafe, startMobile);//更新视图
    widgetManager.updateAppWidget(provider, views);//杀死进程private void kills(List<RunningAppProcessInfo> list, ActivityManager activityManager) {for (RunningAppProcessInfo info : list) {String packageName = info.processName;if(!packageName.equals(getPackageName())){activityManager.killBackgroundProcesses(packageName);}}}//2.常见一个广播继承AppWidgetProviderpublic class ProcessAppWidget extends AppWidgetProvider {public void onEnabled(Context context) {super.onEnabled(context);//开启窗口小部件服务Intent service=new Intent(context, AppWidgetService.class);context.startService(service);}public void onDisabled(Context context) {super.onDisabled(context);//关闭窗口小部件服务Intent service=new Intent(context, AppWidgetService.class);context.stopService(service);}}//3.注册广播<receiver android:name="liu.li.meng.receiver.ProcessAppWidget" ><intent-filter><action android:name="android.appwidget.action.APPWIDGET_UPDATE" /></intent-filter><meta-dataandroid:name="android.appwidget.provider"android:resource="@xml/example_appwidget_info" /></receiver>//4.设置example_appwidget_info文件<?xml version="1.0" encoding="utf-8"?><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"android:minWidth="294dp"android:minHeight="72dp"android:initialLayout="@layout/example_appwidget"></appwidget-provider>32.流量统计(TrafficStats)public static List<TrafficInfo> getTraffics(Context context){List<TrafficInfo> traffics=new ArrayList<TrafficInfo>();PackageManager pm = context.getPackageManager();List<PackageInfo> installedPackages = pm.getInstalledPackages(0);for (PackageInfo packageInfo : installedPackages) {ApplicationInfo applicationInfo = packageInfo.applicationInfo;String name = applicationInfo.loadLabel(pm).toString();//获取应用的名字Drawable icon = applicationInfo.loadIcon(pm);//获取应用的图标int uid = applicationInfo.uid;//获取应用的uidlong rx = TrafficStats.getUidRxBytes(uid);//获取接受的数据流量long tx = TrafficStats.getUidTxBytes(uid);//获取发送的数据流量long totalx=rx+tx;TrafficInfo info=new TrafficInfo(rx, tx, name, totalx, icon);traffics.add(info);}return traffics;}33.手机杀毒
    使用金山的杀毒数据库，杀毒原理:包名相同和签名（经过MD5加密）也相同才认为是病毒1.获取应用的签名信息public String getSignatures(String packageName) throws Exception {PackageInfo packageInfo = pm.getPackageInfo(packageName,PackageManager.GET_SIGNATURES);Signature[] signatures = packageInfo.signatures;String signature = signatures[0].toCharsString();String result = Md5Utils.encode(signature);return result;}2.查询所有的病毒数据，进行扫描匹配；金山病毒数据库，有两个字段，md5(软件签名信息)，name(应用的包名)34.旋转动画
    让一个图片不停的旋转animation = new RotateAnimation(0, 360,Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,0.5f);// 动画执行的周期animation.setDuration(2000);// 重复旋转
    animation.setRepeatCount(Integer.MAX_VALUE);lv.startAnimation(animation);35.自定义进度条1.首先写一个自定义进度条progress_style文件<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android" ><item android:id="@android:id/background"><bitmap android:src="@drawable/security_progress_bg" /></item><item android:id="@android:id/secondaryProgress"><bitmap android:src="@drawable/security_progress" /></item><item android:id="@android:id/progress"><bitmap android:src="@drawable/security_progress" /></item></layer-list>2.然后在progressbar的属性设置为android:progressDrawable="@drawable/progress_style"36.移动改变控件的位置1.找到控件2.获取到屏幕的宽高Display display = getWindowManager().getDefaultDisplay();//获取屏幕的宽高int screenwidth = display.getWidth();int screenHeight = display.getHeight();3.给控件设置触摸事件btn_location.setOnTouchListener(new OnTouchListener() {int startx=0;int starty=0;public boolean onTouch(View v, MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:startx=(int) event.getRawX();starty=(int) event.getRawY();break;case MotionEvent.ACTION_MOVE://getRawx获取的是相对于屏幕的坐标int stopx=(int) event.getRawX();int stopy=(int) event.getRawY();//计算移动的距离 int distancex=stopx-startx;int distancey=stopy-starty;        //计算控件相对于屏幕的位置变化int left = btn_location.getLeft()+distancex;int right = btn_location.getRight()+distancex;int top = btn_location.getTop()+distancey;int bottom = btn_location.getBottom()+distancey;//在屏幕显示区域改变位置，方式控件移除屏幕if(left>=0 && right<=screenwidth && top>=0 && bottom<=screenHeight){btn_location.layout(left, top, right, bottom);//更改控件的位置
                }//把这次的终点作为下次的起点startx=stopx;starty=stopy;    break;case MotionEvent.ACTION_UP:break;}return false;}});37.三击居中
    btn_location.setOnClickListener(new OnClickListener() {long[] mHits = new long[3];public void onClick(View v) {System.arraycopy(mHits, 1, mHits, 0, mHits.length-1);mHits[mHits.length-1] = SystemClock.uptimeMillis();//三击居中if (mHits[0] >= (SystemClock.uptimeMillis()-500)) {//获取控件的宽高int width = btn_location.getWidth();int height = btn_location.getHeight();int l = screenwidth/2 - width/2;int t = screenHeight/2 - height/2;int r = screenwidth/2 + width/2;int b = screenHeight/2 + height/2;//居中
        btn_location.layout(l, t, r, b);}}});38.缓存清理1.获取所有具有缓存信息的应用(1)public void getCacheApp(Context context) throws Exception {PackageManager pm = context.getPackageManager();List<PackageInfo> installedPackages = pm.getInstalledPackages(0);size=installedPackages.size();for (PackageInfo packageInfo : installedPackages) {String packageName = packageInfo.packageName;// 获取缓存信息PackageManager中getPackageSizeInfo()隐藏了该方法，所以只能通过反射的手段得到Class<?> clazz = Class.forName("android.content.pm.PackageManager");Method method = clazz.getMethod("getPackageSizeInfo", new Class[] {String.class, IPackageStatsObserver.class });// 调用方法,他会自动回调IPackageStatsObserver中的onGetStatsCompleted方法method.invoke(pm, new Object[] { packageName, observer });}}(2)//这是一个异步的方法IPackageStatsObserver.Stub observer = new Stub() {@Overridepublic void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {i++;long cacheSize=pStats.cacheSize;//缓存的大小if(cacheSize>0){try {String packageName=pStats.packageName;//获取应用的包名ApplicationInfo applicationInfo = pm.getApplicationInfo(packageName, 0);Drawable icon = applicationInfo.loadIcon(pm);//图标String name = applicationInfo.loadLabel(pm).toString();//应用的名字String cache = Formatter.formatFileSize(context, cacheSize);CacheInfo info=new CacheInfo(icon, name, cache, packageName);caches.add(info);} catch (Exception e) {e.printStackTrace();}}if(i==size){//因为这是一个异步的方法，所以要用一个变量统计当内容加载完之后回调activity通知已经加载完毕 ，之后进行list的显示
                        activity.cacheFinish(caches);}}};IPackageStatsObserver对象依赖于两个个aidl文件，在android.content.pm包下的IPackageStatsObserver.aidl文件和PackageStats.aidl文件2.一键清理缓存
        在framwork中提供了该方法。但是在上层系统给隐藏了起来，所以只能通过反射才能获取到该方法public abstract void freeStorageAndNotify(long freeStorageSize, IPackageDataObserver observer);PackageManager pm=getPackageManager();Class<?> clazz = Class.forName("android.content.pm.PackageManager");Method method = clazz.getMethod("freeStorageAndNotify", new Class[]{Long.TYPE,IPackageDataObserver.class});//计算释放的空间，这里的参数是手机内存的大小(getMemory()或者getMemory()-1L)Long freeSize=Long.valueOf(getMemory()-1L);//清理缓存method.invoke(pm, new Object[]{freeSize,obsever});//清空集合if(!(list == null || list.size() == 0)){list.clear();adapter.notifyDataSetChanged();}}注意：单独清理一个内存是实现不了的，因为系统不支持39.短信的备份
    原理：就是通过内容提供者读取到所有的短信内容，之后通过把短信内容json格式的字符串写入到一个文件中1.读取所有短信内容public List<MessageInfo> getAllMessage(Context context){List<MessageInfo> infos=new ArrayList<MessageInfo>();ContentResolver re = context.getContentResolver();Cursor cursor = re.query(Uri.parse("content://sms"), new String[]{"type","body","address","date"}, null, null, null);while(cursor.moveToNext()){int type = cursor.getInt(0);String body = cursor.getString(1);String address = cursor.getString(2);long date = cursor.getLong(3);MessageInfo info=new MessageInfo(address, date, body, type);infos.add(info);}return infos;}2.通过Gson框架，把短信集合转换成json字符串Gson  gson=new Gson();String json = gson.toJson(infos);3.把字符串写入文件FileOutputStream outputStream=new FileOutputStream(Environment.getExternalStorageDirectory()+"/msm.txt");outputStream.write(json.getBytes());outputStream.close();40.短信的恢复1.读取备份短信文件2.把json格式的数据封装成对象3.删除所有短信内容，把数据添加到短信数据库中private void smsRestore(File file) {try {//1.读取短息备份文件FileInputStream inputStream=new FileInputStream(file);int len=0;byte[] buffer=new byte[1024];ByteArrayOutputStream outputStream=new ByteArrayOutputStream();while((len=inputStream.read(buffer))!=-1){outputStream.write(buffer, 0, len);}String json = outputStream.toString();//2.把字符串封装到MessageInfo对象中List<MessageInfo> infos = dao.changeStringToList(this, json);ContentResolver re = getContentResolver();//3.删除所有短信内容re.delete(Uri.parse("content://sms"), null, null);//4.恢复短信内容for (MessageInfo info : infos) {ContentValues values=new ContentValues();values.put("body", info.getBody());values.put("date", info.getDate());values.put("address", info.getAddress());values.put("type", info.getType());re.insert(Uri.parse("content://sms"), values);}Toast.makeText(this, "短信还原成功", 0).show();} catch (Exception e) {e.printStackTrace();Toast.makeText(this, "短信还原失败", 0).show();}}

41.来去电归属地的显示1.应该通过一个开关，是否打开归属地显示功能2.如果开启归属地显示功能，就应该启动一个服务，一直监听电话的状态3.外拨电话归属地的显示，需要获取到外拨电话号码，那就必须自己定义一个外拨电话广播，获取到电话号码，之后查询归属地数据库显示即可4.来电归属地，通过TelephonyManager.listen(PhoneStateListener listen, PhoneStateListener.LISTEN_CALL_STATE)的一个方法监听即可5.归属地的显示，需要通过windowManager对象添加到窗口上显示，才可显示出来，我们这里通过Toast的方式添加到窗口中//电话管理器TelephonyManager telephonyManager = (TelephonyManager) getApplicationContext().getSystemService(Context.TELEPHONY_SERVICE);//window管理器WindowManagerw indowManager = (WindowManager) getApplicationContext().getSystemService(Context.WINDOW_SERVICE);//监听来电电话的状态listener = new MyPhoneListener();telephonyManager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);//注册外拨电话广播接受者receiver = new MyCallOutGoingReceiver();IntentFilter filter=new IntentFilter();filter.addAction(Intent.ACTION_NEW_OUTGOING_CALL);registerReceiver(receiver, filter);//外拨电话广播private class MyCallOutGoingReceiver extends BroadcastReceiver{public void onReceive(Context context, Intent intent) {String number = getResultData();//外拨电话号码
            showAddressWindow(number);}}//来电状态的一个监听器private class MyPhoneListener extends PhoneStateListener {@Overridepublic void onCallStateChanged(int state, String incomingNumber) {switch (state) {case TelephonyManager.CALL_STATE_IDLE:// 闲置状态if(view!=null){windowManager.removeView(view);}break;case TelephonyManager.CALL_STATE_RINGING:// 响铃状态
                showAddressWindow(incomingNumber);break;case TelephonyManager.CALL_STATE_OFFHOOK:// 接听状态break;}}}//显示归属地显示视图private void showAddressWindow(String incomingNumber) {final WindowManager.LayoutParams params = new LayoutParams();params.height = WindowManager.LayoutParams.WRAP_CONTENT;params.width = WindowManager.LayoutParams.WRAP_CONTENT;params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
//                | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE 不可触摸| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;params.format = PixelFormat.TRANSLUCENT;params.type = WindowManager.LayoutParams.TYPE_PRIORITY_PHONE;// 设置优先级和电话一样view = LayoutInflater.from(getApplicationContext()).inflate(R.layout.call_show_address, null);TextView tv_address=(TextView) view.findViewById(R.id.btn_address);//查询电话号码的归属地String address = AddressDao.getAddress(getApplicationContext(), incomingNumber);tv_address.setText(address);view.setBackgroundResource(Id);//添加window窗口
        windowManager.addView(view, params);//可以拖动归属地显示的位置view.setOnTouchListener(new OnTouchListener() {int startx=0;int starty=0;@Overridepublic boolean onTouch(View v, MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:startx=(int) event.getRawX();//getRawX()获取到相对于屏幕的距离starty=(int) event.getRawY();break;case MotionEvent.ACTION_MOVE:int stopx=(int) event.getRawX();int stopy=(int) event.getRawY();int distancex=stopx-startx;//计算移动的距离int distancey=stopy-starty;params.x+=distancex;params.y+=distancey;windowManager.updateViewLayout(view, params);//更新视图的位置//把停止的点设置为新的起点startx=stopx;starty=stopy;break;case MotionEvent.ACTION_UP:break;}return true;}});}@Overridepublic void onDestroy() {// 取消电话的监听
        telephonyManager.listen(listener, PhoneStateListener.LISTEN_NONE);unregisterReceiver(receiver);//取消外拨电话的广播接受super.onDestroy();}