Android

The Android. mk file is used to describe the project organization and Compilation Method to the compilation system. It is actually a small part of the GNU make file, which will be parsed once or multiple times by the compilation system. The content

1. Differences between drawable-(hdpi, mdpi, ldpi)Dpi is the abbreviation of "dot per inch". The number of dots per inch.Four density classifications: ldpi (low), mdpi (medium), hdpi (high), and xhdpi (extra high)Normal screen: ldpi is 120, mdpi is 1

There are two ways to start that Acitivity: implicit (hidden) intent and explicit (explicit) intent Explicit IntentSpecify the Acitivity to be startedFor example, the following Java code explicitly specifies that B is to be started:Intent intent =

Builder PatternMode explanationLiving in the fast-growing city of Shenzhen, there are many tall buildings. In addition to the soaring floors, the so-called high-rise buildings in the WAN Huang district must be equipped with floor builders and

  A simple example Reference: using the AIDL and reflection mechanisms, you can use hidden APIs to stop a call.   Personally, Dalvik VM is actually spoofed across processes of the same name. You can think of the extended functions of Dalvik VM, and

  During this time, the ListView control is often used in projects, so I have some knowledge about the customization of the ListView control. In fact, the key to using the listView control is the use of the adapter.   Directly Add code   Package com.

In Android development, uidesign is very important. When users use a software, the first thing they feel is not whether the software features are powerful, but whether the interface design is exquisite and the user experience is good. It can also be

Android code 1: Check whether there is a memory card inserted string status = environment. getexternalstoragestate (); if (status. equals (enviroment. media_mounted) {Note that there is an SD card inserted} 2: Set layout this. settheme (r. style.

The project uses ListView. Because ImageView is used, the image source is not in the resource and the resource ID cannot be used. Therefore, SimpleAdapter cannot be used directly and you must write an Adapter yourself. When using ListView and

 These two days, I suddenly received the Test Team and told the company that the Android client should be used on some mobile phones with the following exceptions, some of which were running well and were very strange:1) HttpUtils/getInputStream

Drag the icon on the panel to the interface. Then change the Properties, such,     The activity_main.xml list is as follows: Android: id = "@ + id/radioGroup01" Android: layout_width = "wrap_content" Android: layout_height =

Provider Data TypeContentproviders can recognize multiple data types. User dictionaries only recognize text types, but other providers can recognize the following formats: Integer Long (long) Floating Point Long floating point (double) The data type

[Java]@ OverridePublic void onBackPressed (){New AlertDialog. Builder (this). setTitle ("are you sure you want to exit? "). SetIcon (android. R. drawable. ic_dialog_info). SetPositiveButton ("OK", new DialogInterface. OnClickListener (){ @

[Java]Package com. xiaoma. betweenactivityanimation;Import android. app. Activity;Import android. content. Intent;Import android. OS. Bundle;Import android. view. View;Import android. view. View. OnClickListener;/*** @ Title:

Robotium is a simple and powerful tool for android testing. It is simple because Robotium encapsulates two times based on the Android testing framework InstrumentationTestCase2 and simplifies some basic operations. Its documentation only has one

In this example, a ListView and a TextView are used to implement a notebook-like function. Input in TextView and display it in ListView. ArrayAdapter is used for string storage and ArrayList is used. [Java]Private ArrayAdapter mAdapter; Private

Question ???In Android, how does one set RadioButton to the right of the text and the icon to the left ???Solution:Step 1:Android: button = "@ null" This statement hides the original system's RadioButton icon.Step 2:Android: drawableRight = "@

Iii. HomeActivity HomeActivity is a central navigation place with a central navigation activity. The jump of each sub-module must first return to this position. Other activities must call their static method launch () to switch to this activity

Android has four steps to start from Linux;(1) Start the init process(2) Native Service Startup(3) System Server, Android Service Startup (4) Start Home   Step 1: initial process (system \ core \ init)Invalid Init. rcUsing Init. marvell. rc

The AnimationSet can be added to the Animation, and the setting of the Animation set is effective for all animations added. [Java] AnimationSet anim = new AnimationSet (true );AlphaAnimation a = new AlphaAnimation (1, 0 );RotateAnimation ra = new