How to make a quick start the android emulator

Very very quick start of Android Emulator from Eclipse.

Go to Eclipse s menu Window -> Android SDK and AVD Manager

Select Virtual devices

Select check box Snapshot: Enabled

Press Edit AVD button.

If will closed Android Emulator all data will saved on disk.
If will reopen Android Emulator, configuration and data will read from disk.

[caption id="attachment_768" align="alignleft" width="300" caption="android-emulator-enable-quick-start"]

android/android-emulator-quick-start-300x247.png

[/caption]

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212

Round number float - double to int - long Java example | round-number-float-to-int-java-example


int nf = Math.round(5.789f);
System.out.print(nf); // 6

float f = 28.611f; 
int n3 = Math.round(f);
System.out.println(n3); // 29

double d = 1234.56;
long lon = Math.round(d);
System.out.println(lon); // 1235

int diff = 90 - 40;
// float fDeleni = diff / 10; // error code
float fDeleni = (float)diff / 10.f; // ok
int nRound = Math.round(fDeleni);


// Caution:
int n2 = (int) 8.999f;
System.out.println(n2); // 8

105

How to make a horizontal line in Android application example code | how-to-make-a-horizontal-line-in-android-application-example-code

In html is horizontal line a tag br. In Android source code you can use a View as xml example bellow.


<View
android:layout_width="fill_parent"
android:layout_height="4dip"
android:background="#ffffff"
android:paddingBottom="10dip"
/>

206

ADT 20 Eclipse New Activity wizard cannot be complete due to support library | adt-20-eclipse-new-activity-wizard-cannot-be-complete-due-to-support-library

Issue:
When using New Activity wizard, ADT 20 asked to install Android Support library version 8 even though version 9 has been installed.

Pressing "Install/Update" then ADT popup a window downloading Support library, when finished nothing happen.
Pressing "Check Again" does nothing.
If i restarting Eclipse again this problem.

Notice: If you install new version ADT or update via SDK Manager, open SDK Manager standalone and close Eclipse.
Workaround:
- Close Eclipse
- Open SDK Manager standalone (c:\Program Files\Android\android-sdk-windows\SDK Manager.exe)
- Check the checkbox and uninstall Extras -> Android Support Library.
- Check again Extras -> Android Support Library and install it
- Restart Eclipse
- Try to create new project

android/new-activity-adt-20-issue.png

302

WebView.loadData utf-8 encoding Android | webview-loaddata-utf-8-encoding-android

Try this solution:


String DATA = "Html text....bla bla bla. Hellou world!  čšřžěéá";
String HEADERHTML = 
"<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">" 
+"<html>  <head>  <meta http-equiv="content-type" content="text/html; charset=utf-8">"  
+"</head>  <body>";
String FOOTERHTML = "</body></html>";
WebView mWebView.loadData(HEADERHTML+DATA+FOOTERHTML,"text/html; charset=UTF-8",null);

216

Throwing multiple exceptions Java | throwing-multiple-exceptions-java

Throws multiple exceptions Java example source code


	public void callFc() 
	throws IndexOutOfBoundsException, ArithmeticException
	{
         // my code for example:
         String[] sArray = {"aa","bb"};
         String str = sArray[5]; // IndexOutOfBoundsException

         int n = 5 / 0; // ArithmeticException
        }

public void someFC (){
try{
     callFc();
    }
 catch(IndexOutOfBoundsException e){
      Log.e("TAG", e.toString());
  }
 catch(ArithmeticException e2){ 
      Log.e2("TAG",e2.toString()); 
  }
}

Editace: 2011-09-23 08:57:10
Počet článků v kategorii: 396
Url:how-to-make-a-quick-start-the-android-emulator