Touch event or phone guard face question finishing Answer (b)

TouchEvent or phone guard face question finishing Answer (ii) custom control 1. TouchThe delivery mechanism of events

Top View View View -to-parent child, not handling reverse return

OnInterceptTouchEvent(), the return value control Touch is passed down. true Interrupts the event, false without interrupting the event.

onTouchEvent()The return value determines whether the event is handled. Trueconsumes events and False does not handle event-up passes.

2. How to implement the Carousel animation

ViewPageAnd TextView combine the effects of pictures and titles

ViewPageSet setOnPageChangeListener Listen for transformed images and corresponding text content.

HandlerSend handler.sendEmptyMessageDelayed(0, 200) Delay message, the realization of automatic transformation of the picture.

ViewPageset setOnTouchListener , empty handler Message message queue, stop picture carousel

3. customizing ViewPagePrinciple of combined control implementation

Inheritance ViewGroup The container class MyViewPage dynamically adds controls to the container. can also be a layout combination control and so on

rewrite onMeasure() To set the width height of the control, the child controls must be set manually
getChildAt(i).measure(widthMeasureSpec,heightMeasureSpec);

rewrite onLoayout() sets the position of the control's drawing. Here, animate the child controls 一 to draw in a word shape,
getChildAt(i).layout(getWidth() * i, 0, getWidth() * (i + 1), getHeight());

definition GestureDetector Set gesture Swipe callback listener

rewrite onTouchEvent(MotionEvent) Delegate GestureDetector Gesture recognizer to handle callbacks for sliding touch events onScroll(...) . Sets View scrollBy() the distance in the horizontal direction of the slide. scrollTo(...)set the specific position to slide to

define Scroller and control the sliding slide effect.

rewritten computeScroll() . Viewconstantly callback the method when sliding, control the Update Page page page

definition OnPageChangeListener interface, set page change callback listener onPageChange(...) .

The realization idea of organizing mobile phone guard function point 1. Mobile phone anti-theft function setting principle

SharedPreferencesSave the settings password. Whether the Guride page settings have been directed. SIMCard string number.

ViewPage+ Fragement Implement sliding replacement page logic, getSystemService(Context.TELEPHONY_SERVICE); get to System phone hair

Get to phone SIM card serial number, bind mobile phone number. Registration 广播 . Calling card changes send SMS to a designated security contact.

Sign up for SMS broadcasts. intent.getExtras().get("pdus");get messages that are constantly being sent over. Interception of SMS content to implement the corresponding instruction function operation.

2. Phone Intercept function

ListViewCustomize mData The Adapter changes you can make
AlartDialogAdd blacklist, set blocking mode
AsyncTaskAsynchronously loads the query blacklist. Page Search blacklist
Get to the phone number, hang up the phone, and destroy the call log by opening a service.

3. Software Steward

viewutils annotation events, annotation control issues,

By context.getPackageManager() getting PackageManage all the software managers installed on your phone. And customize the Adapter``ListViwe display software list.

ListViewSet the setOnItemClickListener listener popup PopupWindow setting accordingly Intent to implement the operation of the list item software

4. Process Management.

Gets the process information to which the system service has been run

// 通过AcitvityManager 取得想应的进程信息；
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
// 获取到包管理器
PackageManager pm = context.getPackageManager();
// 获取系统运行的程序信息
List<RunningAppProcessInfo> runningAppProcesses = am.getRunningAppProcesses();

AsyncTaskAsynchronously loading, ListView showing the list of processes. and distinguish between a system process or user process.

by ActivityManager killBackgroundProcesses(...) killing the user process.

To prevent the Service background thread from being killed. Dynamically register registerReceiver a broadcast, restart Kill Service .

Touch event or phone guard face question finishing Answer (b)