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divides all permission (permissions) into four levels based on their potential risk, namely "normal", "dangerous", "signature", "Signatureorsystem". The APK installation corresponds to the install_packages, and the permission level belongs to the latter two. Therefore, finally want to realize the silent installation of apk, must need some special processing, the implementation of the installation process, must be the system process.So let's take a lo
The error description is:Java.lang.IllegalStateException:You need to use a theme.appcompat Theme (or descendant) with this activity.Cause:I want to set my activity full screen in manifest with the following code: activity android:name=". Mainactivity" android:theme="@android: style/ Theme.NoTitleBar.Fullscreen" android:label="@string/app_name " >Reason:Mention Theme.
1. If power and flow are not taken into account, simply inherit the runnable in the corresponding activity, write a while loop inside the Run method, call the interface to return the data, and update the UI immediately if the data has changed2. Need to consider the power, is the remote server to send messages to the client, the client receives information, to send a broadcast, the corresponding activity received the broadcast to update the UI, the bro
Today do an Android file manager, which used a lot of places to use the getresources. drawable Currenticon = Null;currenticon = Getresources (). getdrawable (r.drawable.folder); CurrentIcon = GetResources (). Getdrawable (R.drawable.image); At first, it was not quite understood why the Getresources () method could be used to obtain the resources of the existing system. So I looked at the document and read the information:For example, if you put the re
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Android calls are implemented in two ways:The first method, call the phone to jump to the dial-up interface. The source code is as follows:New= Uri.parse ("Tel:" + "135xxxxxxxx"); intent.setdata (data); StartActivity (intent) ;View CodeThe second method, the call directly to dial, but some third-party ROM (for example: MIUI), not directly dial, but to the user to choose whether to dial, the source code is as follows:New= Uri.parse ("Tel:" + "135xxxxxx
Work, there will always be a task to develop a new page, the general process is the product manager to determine the page and function to develop, and then the designer to provide the design manuscript, then by our developers to complete the development work.Usually, the designer provides the design of the dimension will be very detailed, such as when it comes to words, word size, location, color, font, etc., will be one by one mark. Note that the designer offers all dimensions in px(pixels).How
;=Address%>span> span>= Number%>span> Div>I want to get the NUM value so I wrote:$ (". Num"). Children ("span"). EQ (1). HTML ()And then I found out that a bunch of messy code meant that iOS rendered this number as a phone number and added a new span node in front of that number because I was using the EQ (), so it was tragic.The solution, of course, is to disable the phone call featurename= "format-detection" content= "Telephone=no"/> If you need
Normally, when 3G and WiFi are on, Android uses Wi-Fi by default, but it is not possible to have WiFi everywhere in the real world, so the phone will often automatically switch networks.Sometimes, when the phone starts using WiFi, it will automatically switch from WiFi to 3G network 10-30 minutes after it enters standby.If you write a network program, the effect of automatic network switching on the program is very obvious, the IP address will definit
1, Sharedpreferences Prefs.edit (). putstring ("SHAKE", Object.getstring ("SHAKE")).commit ();Sharedpreferences When the value is stored, put in, must commit, otherwise it will not take effect. 2. Thread new Thread () {public voidRun (){ 。。。。。 }; }.start ();thread, a long time ago I new a thread, the result forget start, I tangled for a long time ... Only to find that there was no start. Later, I remember the thread to start, the result forgot to run, in-line write what code all error, finally f
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{myfunction MyFunction = new MyFunction (); int c = Myfunction.add (3, 4); LOG.D ("Add", string.valueof (c)); Assert.assertequals (7, c);}}6. After the Unit test class has written the above code, we cantest the two methods in the MyFunction class to find the outline view:If we want to test testadd (), we just need to find the corresponding testadd () in outline, then right-click, Run as->android Junit test,
An Android mobile phone can be captured by any application and its solution without the need of root Some Android applications have screenshot functions. However, the screenshot function requires the root permission. These applications cannot take screenshots of the system without the root permission.However, the vulnerability on the Huawei P6 allows applications
Today do an Android file manager, which used a lot of places to use the getresources. drawable Currenticon = Null;currenticon = Getresources (). getdrawable (r.drawable.folder); CurrentIcon = GetResources (). Getdrawable (R.drawable.image); At first, it was not quite understood why the Getresources () method could be used to obtain the resources of the existing system. So I looked at the document and read the information:For example, if you put the re
Android WebView Call JS method very easy, Webview.loadurl ("Javascrpt:yourfunction ()");However, this method has no way to get the return resultThe return result can be obtained only by invoking the alert method and then by overriding the Onjsalert method in the webchromclient.such as Webview.loadurl ("Javascript:alert (YourFunction ())")The string message parameter in the Onjsalert method in Webchromclient will accept the result of the JS return.****
The answer is yes, at least better than clear text.When the client registers and logs in: a feasible method is that the client submits the MD5 (password) password (as described above, this method simply protects the password and is likely to be looked up for the password).When registering: The server-side database stores the password through MD5 (SALT+MD5 (password)) rules, which are stored only on the server and randomly generated each time the password is stored . The cost of making a dictiona
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