Android from hardware to application: Step by Step 4-use the JNI method to tune the hardware driver
In Android, java applications call the hardware abstraction layer module through the JNI method, from hardware to application in Android: Step by Step 3 -- access the hardware driver in the Hardware Abstraction Layer
We
' s Runonuithread () method, a View component ' s post () method, and The Android Handler Framework to has the Non-ui thread send a user interface update request back to the UI thread for dis Play. Each of these past three options take advantage of the underlying UI event message channel to message the UI thread to per form the user interface update. In this post, I show you a different means of providing the communications via broadcast intent that'
Maketext represents a context object, the second parameter is represented as the displayed content, the last parameter is the length of time to display the Toast, Toast.length_long indicates a slightly longer display time, toast.length_ Short indicates a slightly shorter display time, and then don't forget to call the toast's Show method to display it.
Finally, as in the previous chapter of the Phone Dialer, because the app uses system permissions, so to add a user rights to the app, add the
of them has a higher priority, such as cn.com. fetion, the actual receiving order is
Getpackagename: cn.com. fetionGetpackagename: COM. Tencent. qqpimsecureGetpackagename: COM. qihoo360.mobilesafeGetpackagename: COM. ijinshan. mguardGetpackagename: COM. LBE. Security. LiteGetpackagename: COM. handsent. nextsmsGetpackagename: COM. example. boottest
Note:
The above is just a simple test, not that these applications are in this order, because their priorities may be inconsistent, or the file names
every Activity opened. When you need to exit, close every Activity.
3. Send a specific broadcast: Send a specific broadcast when you need to end the application. After each Activity receives the broadcast, close it.
4. recursively exit and use startActivityForResult when opening a new Activity. Then add the flag and process it in onActivityResult. recursively close the event.
Except for the first one, we try to end every Activity and achieve the goal
To run Android, you must not only compile the kernel correctly, but also install the root file system correctly. The first step is to extract data from the data directory of the simulator. Maybe you will ask, why is it extracted from the simulator? This is the most convenient method. You do not need to create a directory or file on your own. Run the simulator on a terminal and the android system runs normal
://play.google.com/store/apps/ Details?id=com.wt.calendarcardsample Androidwheel Android Wheel support City, multiple datetime, password, picture Project Address: Https://github.com/sephiroth74/AndroidWheelAndroid-async-httpAn asynchronous, callback-based HTTP client development package on Android, built on Apache's httpclient library.Https://github.com/loopj/an
Udacity Android Practice Note: Lesson 4 Part B/titer1/archimedes of dry Goods shop choresSource: Https://code.csdn.net/titer1Contact: 13,073,161,968 (SMS Best)Disclaimer: This document is licensed under the following protocols: Free reprint-Non-commercial-non-derivative-retention Attribution | Creative Commons by-nc-nd 3.0. Reprint please indicate the author and source.Tips:https://code.csdn.net/titer1/pat_
software. It can be in the menu or in the settings. You can refer to moji, sogou input method, QQ, and other software that supports skin replacement.3. load the skin file in the specified path, read the thumbnail, and display it on the skin settings page, decompress the selected skin file to the "/data/[package name]/skin" path.4. The software preferentially reads Resources in the "/data/[package name]/skin/" path. If not, use the resources in the AP
Android system.
In Android, activity has four basic states:1. RunningAt the front of the screen, it is visible and interactive with the user.2. pausedWhen acitivy is overwritten by another transparent or non-full-screen activity, the status is paused. Although visible, it cannot interact with each other.3. StopWhen the activity is overwritten by another activity and the interface is invisible, it is in the
Intent object for receiving app widget Broadcast
Appwidgetprovider is just a convenient class. If you want to directly receive app widget broadcasts, You can implement your own broadcastreceiver class or override the onreceive (context, intent) callback method. You need to care about the following types of intent objects:
Action_appwidget_update
Action_appwidget_deleted
Action_appwidget_enabled
Action_appwidget_disabled
Action_appwidget_options_changed
Create a configuration activity for the app
Android-gradle-simple introduction 4: Configuring manifest in the Custom Build Process
The Android Gradle plug-in provides a large number of DSL custom build processes. This blog explains how to configure manifest in gradle.
DSL provides the ability to configure the following Manifest entries:
MinSdkVersion
TargetSdkVersion
VersionCode
VersionName
ApplicationId
Udacity android Practice Notes: lesson 4 part B, udacityandroidUdacity android Practice Notes: lesson 4 part B
Prepared by: Taobao stores/titer1/ArchimedesSource: https://code.csdn.net/titer1Contact: September 1307316 (best SMS)Statement: This article uses the following agreement for authorization: Free Reprint-non com
Android positioning generally has four methods, these four ways are: GPS positioning, WiFi Dingzhun, base station positioning, AGPS positioning, NBSP;NBSP;NBSP (1) Android GPS: Requires GPS hardware support, direct and satellite interaction to obtain the current latitude and longitude, this way requires mobile phone support GPS module (now most of the smart machines should have). The accuracy of GPS is
Udacity Android Learning Note: Lesson 4 Part B/titer1/archimedes of dry Goods shop choresSource: Https://code.csdn.net/titer1Contact: 13,073,161,968Disclaimer: This document is licensed under the following agreement: Free reprint-Non-commercial-non-derivative-retention Attribution | Creative Commons by-nc-nd 3.0, reproduced please specify the author and source.Tips:https://code.csdn.net/titer1/pat_aha/blob/
Android applications. Samsung i9000 series (4). How superoneclick obtains root permissions
Papaya 20110408
I. Preface
After self-testing and analysis, the author concludes that the root permission is the most intuitive for Android phones.The most effective method is the superoneclick method!It has nothing to do with what jpe, jpd, jp8, and so on of the i9000 ba
that the PS2 mouse was used. However, Android did not use the PS2 mouse, but the touchscreen mouse was used, the device file is/Dev/input/event0. For details, see my blog: Android native C Development 3: mouse event (Mouse capture). After modification, the mouse can be processed;
4. The timer is implemented in UNIX;
5. multithreading uses the implementation of p
to know the length and width of the desired image in advance. For example, I want to cut an image of 400*400 (unit: px. Use this as a benchmark to calculate the length and width of the Rect displayed on the screen, and then draw the MaskView. Select the mode as needed. This article uses the first mode as an example. The code below:
Package on the basis of the miscellaneous documents. First, encapsulate a MaskView to draw the bright effect in the dark, or you can add a scroll bar. This is not a
combine with RadioButton to show the effect of multiple choices? Let's look at the XML and we'll know:1 XML version= "1.0" encoding= "Utf-8"?>2 LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6 >7 Radiogroup8 Android:
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