int java android example

int occupy 4 bytes (32 bits) in memory

int in Java example of using Integer and Array of Integer and Iteger to String


        // get max end min values of int in Java example 4 bytes (32 bits) PC architecture
	System.out.println(Integer.MAX_VALUE); // 2147483647
	System.out.println(Integer.MIN_VALUE); // -2147483648


// members variable
private int mProgress = 10;

//integer to string java
int myInteger = 8;
String myString = Integer.toString(myInteger);

// a final variable can only be initialized once
static final int NUM_PARTICLES = 15;

 for (int i = 0; i < NUM_PARTICLES ; i++) { 
// do something
}

// int as return value of function
public int getCount() {
return 5;
}

// int as a parametr of function
public float getFloatFromInt(int i) {
float fRet = (float) i;
 return fRet;
}

//array of int
int[] anArray;              // declares an array of integers
          anArray = new int[2];      // allocates memory for 2 integers
          anArray[0] = 100; // initialize first element
          anArray[1] = 200; // initialize second element

for (int i = 0; i < anArray.length; i++) {
// print out values from anArray
System.out.println("Index: " + i);
System.out.println("Value: " + anArray[i]); 
}

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238

Admob ads not visible on emulator Android 4.1 | admob-ads-not-visible-on-emulator-android-4-1

If you using GoogleAdMobAdsSdk-4.0.4.jar in your project and set android:targetSdkVersion="17" in AndroidManifest.xml , ads will not visible on emulator with Android 4.0.3 or 4.1.
You have to set as android:targetSdkVersion="17"


<uses-sdk android:minSdkVersion="4" 
        android:targetSdkVersion="17" />

Update project.properties file - row with target to 17:


# Project target.
target=android-17

341

Android Studio add library dependencies to module project | android-studio-add-library-dependencies-to-module-project

File->Project Structure Ctrl + Alt + Shift + S

Select module and Dependencies Tab

Click on + PLUS button (right upper corner)

Select library

android/android-studio-add-library-into-project.png

327

Screen size density independent pixel resolution | screen-size-density-independent-pixel-resolution

Terms Screen size, density, density independent pixel, resolution as a picture - pictogram.
android/screen-resolution.png

Test your knowledge
Q: How to find out the phone screen size?
A: (By length of display diagonale in inch - Not to measure a diagonal of device!!!)

Q: What resolution has 720 x 1280 display?
A: (921600 pixels)

Q: What does it mean "240 dpi" screen density?
A: (Display have density 240 x 240 dots - "Tri-color LED etc." - per every physical (real) square inch. If you have icon 240x240 pixels, this will just occupy an area of one square inch on the display.)

Q: Phone have screen density 240 dpi. Image for 160 dpi screen density have size 128x 128 pixels. What will be the size of the image for 240 dpi screen density?
A: (Calculate the virtual pixels size. 128 * (240/160) = 192. You have to resize image to new size 192 x 192 physical pixels and put into folder drawable-hdpi (high) ~240dpi for phone with screen density 240 dpi. ) or use density independend pixels 128dp x 128dp.

Sqlite create database and table with BAT file for Android | sqlite-create-database-and-table-with-bat-file

Sqlite3 create database and table with load.bat file and fill data to table example.

Create folder for your project: my_sqlite_project

Open folder and create file load.bat and paste to load.bat this text and save to project folder:
```
sqlite3 my_database.s3db < load_text.sql

pause
```

Create load_text.sql file and paste this text and save to project folder:


CREATE TABLE [android_metadata] (

[locale] TEXT

);









CREATE TABLE [my_table] (

[_id] int NULL,

[word] VARCHAR(255)  NULL,

[description] VARCHAR(255)  NULL









.separator ";"

.import text_file.txt my_table

Create text_file.txt and paste this text and save it as UTF-8:
```
1;word1;my first word

2;word2; my second word 
```

Download sqlite3.exe and put to project folder.

Run BAT file load.bat and read text instruction from console

If database created you can open and edit this with sqlite database explorer

Copy database to Asses Android project folder

If you want using this database in Android application on device, you have to copy this database to folder on device /data/data/com.MyPackage/databases/

169

Iterate HashMap getKey getValue Java Example | iterate-hashmap-getkey-getvalue-java-example


 HashMap<String,Locale> _mapOfLocale = new HashMap<String,Locale>();
    _mapOfLocale.put("French",Locale.	FRENCH	);	
    _mapOfLocale.put("German",Locale.	GERMAN	);	
    _mapOfLocale.put("Italian",Locale.	ITALIAN	);	

    for (Entry<String, Locale> entry : _mapOfLocale.entrySet()) {

       System.out.println(entry.getKey());
       System.out.println(entry.getValue());

      }

Editace: 2011-09-26 20:51:00
Počet článků v kategorii: 396
Url:int-java-android-example