how to print texts from android

Use Netty for communication between Android and Server to send and receive texts and upload images, Another title: Let's use netty to achieve text send and receive and image transfer to server based on android and jdk1.7 Let me Rap The requirement is that the android client uploads a photo to the server, and the serve

install. Unfortunately, Android does not provide a command to uninstall the application. You can only manually delete the command: adb shell cd/data/app rm app.apk.2. Enter the shell of the device or simulator: Through the above command, you can enter the shell environment of the device or simulator. In this Linux shell, you can execute various Linux commands. If you only want to execute a shell command, you can use the following method: adb shell [c

Android TextView sets the background color and text color of some texts Implemented through SpannableStringBuilder, which is like changing the text color or background color of a specified text by elements in html. Public class MainActivity extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); String

Guo XiaoxingWeibo: Guo Xiaoxing's Sina WeiboEmail:[email protected]Blog: http://blog.csdn.net/allenwellsGithub:https://github.com/allenwells In Android 4.4 and later systems, services that print pictures and text directly from Android apps, including printing pictures, HTML pages, and creating custom printed documents, are available.

Original address: http://android.xsoftlab.net/training/printing/custom-docs.htmlFor some applications, such as drawing apps, layout apps, and other apps, these apps focus on graphics output, and having a nice print page is a key feature of them. In this case, it's not just about printing a picture or an HTML document. These programs have a special fine-grained control over everything in the page for this type of printing, including fonts, text flow, p

http://blog.csdn.net/freshui/article/details/9456889The printing stack is a common method of debugging, in general, when the system is abnormal, we can print out the stack of abnormal cases, so it is very convenient to find errors. There is actually another very useful feature: analyzing the behavior of the code. Android code is too large and complex, and full static analysis is often impossible, so it is n

When using JNI in a Java environment, you can easily print information using the printf function, and in the Eclipse Console console view it is easy to observe that if you use JNI in an Android environment, the printf function will not work. No output is visible in the Logcat view and the console view. But we can use the log method of Android itself to implement

a filter for the project name. Using LogCatThe Log tool class in Android is log (ANDROID.UTIL.LOG), which provides several ways for us to print the logs. LOG.V () corresponds to Verbose LOG.D () corresponds to Debug LOG.I () corresponding Info LOG.W () corresponds to Warn LOG.E () corresponds to Error LOG.WTF () Prints the execution path (the call stack) at this point in t

Android log Print class Logutils, able to navigate to the class name, method name, and number of rows where the error occurred and save the log file In development, we often use print log to debug our application. In Java we often use Method System.out.println () to print logs in the console for our debugging. The

As an Android developer, it's very painful when the log doesn't print. Believe that someone has encountered the ADB connection is normal, in the development tool also normal display device information is normal but can not print log or can only print part of the log, it may be possible to try to enter the project mode

Android under no execinfo.h, you can't print the back trace method under glibc. Glic print back trace see: http://blog.csdn.net/span76/article/details/11927551I have written the following method for reference: #include Android is using a similar Execinfo method provided by Libcorkscrew to get backtrace information.Unfo

directory. The content of the file is only three lines by default, all of which are comments. Add a line after it and the content is 0x12d1. 6. Repeat Step 3. logcat should be ready to work now. The above is still useless for debugging and printing logs on mobile phones. I don't know if this person has tried to use mobile phone debugging to print information. I tried it but it didn't work. It would be nice to use a simulator, you can use the above m

In the Android debugging process often appear the results of the program is not our expected results, it is necessary to add log printing debugging, see whether the call process is correct, at this time need to print the program's call stack, especially the Android code is quite large, the printing stack is more conducive to our analysis of the problem, The follo

(tag, content); public static void W (String content, Throwable tr) {if (!isdebug) return; String tag = Generatetag (); LOG.W (tag, content, TR); public static void W (Throwable tr) {if (!isdebug) return; String tag = Generatetag (); LOG.W (tag, tr); public static void WTF (String content) {if (!isdebug) return; String tag = Generatetag (); LOG.WTF (tag, content); public static void WTF (String content, Throwable tr) {if (!isdebug) retur

Reprint Please specify source: http://blog.csdn.net/droyon/article/details/41895939On an Android device, we can get to the device log in the following ways:ADB logcat-v TimeBut we get a lot of log that's useless to us in this way. So we can filter log in the following ways:ADB logcat-v time-s "TAG"-S: The delegate only gets the log corresponding to the tag.Or:ADB logcat |grep-v "TAG1" |grep-v "TAG2"-V: For all logs, the log corresponding to TAG1 is no

is null lineNumber -The line number of the source code line that contains the execution point represented by the stack trace element, or negative if this information is not available. A value of 2 means that the method that contains the execution point is a native method When we develop on Android, we can use Stacktraceelement class to implement the

codecorresponding to the Java code in Android, respectively.LOG.D (), LOG.I (), LOG.W (), LOG.E (), LOG.F () and other methods.4. For example[CPP]View Plaincopyprint? #include #include #include #define TAG "Myhello-jni-test"//This is the identity of the custom log #define LOGD (...) __android_log_print (android_log_debug,tag,__va_args__)//define LOGD type extern "C" { Jniexport jstring jnicall Java_com_snail_helloworld_maina

The six methods are: Based on RGB segmentation, based on RG same channel segmentation, ycrcb + Otsu (Ostu can refer to the http://blog.csdn.net/onezeros/article/details/6136770, Http://wenku.baidu.com/view/05c47e03bed5b9f3f90f1ce4.html), ycrcb space, YUV space, HSV space. The next step is to use JNI to port the detection to Android. The final goal is to enable the android smart phone to use the palm

Transferred from: https://www.2cto.com/kf/201611/569468.htmlBefore the development of single-chip computer software or the host computer are accustomed to use printf (), I believe many will have the same habits as I do. began to learn Android, of course, also very concerned about the Android print debugging should do? Here's how to add a filter to a log recordCli

There are five categories of layouts in Android, sometimes you might use one, but sometimes you may need two or three layouts together. These five layouts are: linearlayout (linear layout), Framelayout (frame layout), relativelayout (relative layout), tablelayout (table layout), absolutelayout (coordinate layout);LinearLayout: is called linear layout, divided into horizontal and vertical, set vertical or horizontal attribute values, to arrange all the