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Date time difference determine which is earlier Android Java example


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Date difference in millisecond between two date, GregorianCalendar, Calendar, after(), befor(), getTimeInMillis().



public class HoriziontalScrollActivity extends Activity {
TextView txtV;
	Context cntx;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        txtV = (TextView)findViewById(R.id.idLabel);
        cntx = this;
        StringBuilder strBuild = new StringBuilder();
        Calendar firstDate = new GregorianCalendar(2011, Calendar.DECEMBER, 31);
        Calendar secondDate = new GregorianCalendar(2012, Calendar.JANUARY, 1);

        
        Boolean bDetermine = firstDate.after(secondDate);            // false
        strBuild.append("Is firsDate after secondDate? " + bDetermine + "

"); bDetermine = firstDate.before(secondDate); // true strBuild.append("Is firsDate before secondDate? " + bDetermine + "
"); long differenceInMillisecond = 0L; differenceInMillisecond = secondDate.getTimeInMillis()-firstDate.getTimeInMillis(); // second == 1000 millisecond long second = differenceInMillisecond / 1000L; strBuild.append("Difference between two dates is: " + second + "
"); txtV.setText(strBuild); } }

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356

No USB devices or running detected | no-usb-devices-or-running-detected


Check

  • is sett debug mode on device?

  • enabled debugging over USB?

  • is device right connected?

  • have you downloaded and instaled drivers for your device on PC?

  • For Windows //developer.android.com/sdk/win-usb.html

  • try disconnect and connect USB cable

  • try do restart Android Studio

147

Resize a bitmap image Android example | resize-a-bitmap-image-android-example



public class ApokusActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}
		
		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = new Paint();
			
			canvas.drawColor(Color.YELLOW);
            
	         
	         paint.setFilterBitmap(true);
	         Bitmap bitmapOrg = BitmapFactory.decodeResource(getResources(),R.drawable.flower_blue);
	         int targetWidth  = bitmapOrg.getWidth() * 2;
	         int targetHeight = bitmapOrg.getHeight() * 2;
	         Bitmap bmp = Bitmap.createBitmap(targetWidth, targetHeight,Bitmap.Config.ARGB_8888);
	         RectF rectf = new RectF(0, 0, targetWidth, targetHeight);
	         Canvas c = new Canvas(bmp);
	         Path path = new Path();
	         path.addRect(rectf, Path.Direction.CW);
	         c.clipPath(path);
	         c.drawBitmap( bitmapOrg, new Rect(0, 0, bitmapOrg.getWidth(), bitmapOrg.getHeight()),
	                         new Rect(0, 0, targetWidth, targetHeight), paint);
	         Matrix matrix = new Matrix();
	         matrix.postScale(1f, 1f);
	         Bitmap resizedBitmap = Bitmap.createBitmap(bmp, 0, 0, targetWidth, targetHeight, matrix, true);
	         int h = bitmapOrg.getHeight();
           canvas.drawBitmap(bitmapOrg, 10,10, paint);
           canvas.drawBitmap(resizedBitmap, 10,10 + h + 10, paint);
           
		}

	}
}


resize bitmap android
137

Draw drawARGB() Android basic example | draw-drawargb-android-basic-example



public class MainActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}
		@Override
		protected void onDraw(Canvas canvas) {
			//drawARGB (int a, int r, int g, int b)
//			a  alpha component (0..255) of the color to draw onto the canvas 
//			r  red component (0..255) 
//			g  green component (0..255)  
//			b  blue component (0..255)  

			canvas.drawARGB(255, 0, 255, 10); 
		}

	}
}


335

IllegalArgumentException Unknown Uri content SearchableDict | illegalargumentexception-unknown-uri-content-searchabledict


If you change the package name, you have to add new package name in:

DictionaryProvider.java


public class DictionaryProvider extends ContentProvider {
    String TAG = "DictionaryProvider";

//    public static String AUTHORITY = "com.example.android.searchabledict.DictionaryProvider";
// change to your new package name
public static String AUTHORITY = "com.myweb.mysubdomen.searchabledict.DictionaryProvider";
    public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/dictionary");


// in AndroidManifest.xml
//change com.example.android to your package e.g. com.myweb.mysubdomen
<!-- Provides search suggestions for words and their definitions. -->
        <provider android:name="com.example.android.searchabledict.DictionaryProvider"
            android:configChanges="keyboard|keyboardHidden|orientation"
                  android:authorities="com.example.android.searchabledict.DictionaryProvider" />

        <!-- Points to searchable activity so the whole app can invoke search. -->
        <meta-data android:name="android.app.default_searchable"
            android:configChanges="keyboard|keyboardHidden|orientation"
                   android:value=".SearchableDictionary" />

// I change like this:
        <!-- Provides search suggestions for words and their definitions. -->
        <provider android:name=".DictionaryProvider"
            android:configChanges="keyboard|keyboardHidden|orientation"
                  android:authorities="cz.okhelp.android.searchabledict.DictionaryProvider" />

        <!-- Points to searchable activity so the whole app can invoke search. -->
        <meta-data android:name="android.app.default_searchable"
            android:configChanges="keyboard|keyboardHidden|orientation"
                   android:value=".SearchableDictionary" />


Do not forget change package name in all java class and xml/searchable.xml
In my project I changed like this:

<searchable xmlns:android="//schemas.android.com/apk/res/android"
        android:label="@string/search_label"
        android:hint="@string/search_hint"
        android:searchSettingsDescription="@string/settings_description"
        android:searchSuggestAuthority="cz.okhelp.android.searchabledict.DictionaryProvider"
        android:searchSuggestIntentAction="android.intent.action.VIEW"
        android:searchSuggestIntentData="content://cz.okhelp.android.searchabledict.DictionaryProvider/dictionary"
        android:searchSuggestSelection=" ?"
        android:searchSuggestThreshold="1"
        android:includeInGlobalSearch="true"
        >
 </searchable>


93

Android Emulator PC keyboard shortcuts | android-emulator-pc-keyboard-shortcuts


Basic shortcuts for Android Emulator.
























Emulated Device Key Keyboard Key
Home HOME
Menu (left softkey) F2 or Page-up button
Star (right softkey) Shift-F2 or Page Down
Back ESC
Call/dial button F3
Hangup/end call button F4
Search F5
Power button F7
Audio volume up button KEYPAD_PLUS, Ctrl-5
Audio volume down button KEYPAD_MINUS, Ctrl-F6
Camera button Ctrl-KEYPAD_5, Ctrl-F3
Switch to previous layout orientation (for example, portrait, landscape) KEYPAD_7, Ctrl-F11
Switch to next layout orientation (for example, portrait, landscape) KEYPAD_9, Ctrl-F12
Toggle cell networking on/off F8
Toggle code profiling F9 (only with -trace startup option)
Toggle fullscreen mode Alt-Enter
Toggle trackball mode F6
Enter trackball mode temporarily (while key is pressed) Delete
DPad left/up/right/down KEYPAD_4/8/6/2
DPad center click KEYPAD_5
Onion alpha increase/decrease KEYPAD_MULTIPLY(*) / KEYPAD_DIVIDE(/)


More about Android Emulator


Editace: 2011-09-29 19:28:59
Počet článků v kategorii: 397
Url:date-time-difference-between-two-dates

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