Recent company projects add something, the caller is "mobile banking", the callee is "Bankeys", take a time to record, in fact, very simple1. Caller:This we can use the normal activity of the startup mode, the code is as follows:New Intent (); Intent.setaction ("com.bankeys.mobile_sign"); Intent.putextra ("Data" ) 1);2. Callee:Add the following code to the manifest file of the activity that needs to be called by the caller app:activity android:name= "Com.bankeys.shield.activity.BankBi
overlays the main content when the drawer//opens Mdrawerlayout.setdrawershadow (R.D
Rawable.drawer_shadow, Gravitycompat.start);
Mdrawertoggle = new Actionbardrawertoggle (this, mdrawerlayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close) {/** Called when a drawer has settled in a completely the state. */Public VO ID ondrawerclosed (view view) {Invalidateoptionsmenu ();//creates call to//Onprepa Reoptionsmenu ()}/**
:
Add the following two lines according to the method on the file:
..........
Extern int register_android_test (jnienv * env); // This is the registration function in the android_test.cpp file.
..........................
Static const regjnirec gregjni [] = {
.........
.........
Reg_jni (register_android_test ),
.........
.......
};
Step 3: Create a Java call layer and create the file test. Java in the frameworks/base/CORE/Java/
The fluency of the Android system has been compared to iOS and is considered inferior to the latter. This aspect is related to the uneven quality of the Android device, on the other hand, and the implementation of the Android system. For example, before 3.0, the Android application UI drawing does not support hardware
, and before the preceding callback function. You usually do not need to implement this method, because the default appwidgetprovider is used to filter all app widget broadcasts and call the above method properly.
Note:In Android 1.5, there is a known issue that the ondeleted () method is not called during this call. T
understanding. In fact, this startup process is to load and
Register with the application framework layer and finally run our own application at the application layer. So what is the relationship between different levels? Application
How does a program call the underlying core service at the top? The next section analyzes the relationships between different layers.
1.1.3 relationship between different levelsThe previous section describes the Startup
Use JavaScript to call Android code
1. Use the addjavascriptinterface method of the webview object
2. the addjavascriptinterface method has two parameters. The first parameter is a class that we generally implement. The class provides the method we want to provide for JavaScript access; the second parameter is the JS object used to access the method declared in OBJ. The
ConfigurationWebSettings ws = Webview.getsettings ();Enable JavaScriptWs.setjavascriptenabled (TRUE);A page that is loaded into the assets directoryWebview.loadurl ("file:///android_asset/www/index.html");}}
WebView also has a very important method--addjavascriptinterface that can be used to implement the invocation of Java programs and JavaScript programs, the code is as follows:
Copy Code code as follows:
Webview.addjavascriptinterface (New Object () {
public void Clicko
not start Android Studio), change the following configuration file before starting.
Idea.properties file (file is located in the bin directory of Android Studio Android directory, the author's path is "C:\Program files\android\android studio\bin\")
Add a
process. In fact, this startup process is to load and register it to the application framework layer step by step from the underlying Linux kernel layer in the android architecture diagram, and finally run our own applications on the application layer. So what is the relationship between different levels? How does an application call the underlying core service at the top? The next section analyzes the rel
Save Restore State and previous examples The android Apidemo example resolves (9): The UI for app->activity->persistent State implementation is similar, but the functionality and implementation methods are slightly different. (9) The values that are edittext in the UI are maintained through shared Preferences and Activity OnPause (), and Onresume (). This example is achieved by Onsaveinstancestate (Bundle
Objective
As Android developers, presumably more or less to touch the start speed optimization related things, when the user more and more, the product function with more and more iterations, the App gradually become bloated is a very common phenomenon, even can be said to be unavoidable phenomenon, followed by the work is to optimize the performance of the app,
First of all, we found that most of the Android smartphones we use now have the power button to hang up when you're on the phone, usually in the setup.
I mainly in the original source code to add this function, mainly for learning .... First look at a picture:
See that press the power button to hang up the phone, that is what I added, originally source code is not this column ...
probably thinking:
First I add this checkboxpreference, and then I s
Speaking of Android phone, most people's impression is a bit of time to become a little lag, some programs in the run inexplicably crashes, open the System folder A look, found a lot of files, and then use the mobile phone butler APP constantly clean optimization, just feel the speed slightly improved point, Even if the mobile phone in a variety of performance in front of the software score ahead, or feel n
One Android app
Program It is mainly to set the scene mode on a regular basis, so we need to call the flight mode through programming. After searching, we cannot find the relevant explanations and descriptions, finally, I saw a solution on a foreign forum and finally solved the problem.
Code As follows:
1
// Skip row Mode
2
Protected
Void
Offlin
/Directory for other varous XML files that contain a collection of resources, such as string and color definitions.When you build and run the default Android app, the default Activity class starts and loads a layout file that says "Hello World. "The result is nothing exciting, but it's important that you understand how to run your app before you start developing.
SDK Access (2) on Android Google play inside payment (In-app billing) Access
Next to the Android Facebook SDK access (1) after finishing the Facebook access process, you can then sort out the access process for Google Play in-app billing payments. Google Play is known as the official Google
amount of physical memory used by the heap cannot be shrunk. After garbage collection, Dalvik traverses the heap and finds pages that are not in use, and then uses Madvise (System call) to return those pages to kernal. Therefore, the paired allocations and deallocations chunks of data can allow the physical memory to be recovered normally. However, recycling of fragmented memory can be inefficient because those fragmented allocation pages may be shar
Background: Use Google VR SDK for Unity to develop 3D scene features, then export Android items and merge them into one Android app for other activity calls.
The main activity for the Android project, developed by the Google VR for Unity SDK Untiy project, is com.google.unity.GoogleUnityActivity. If you need to ext
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