Display screen size resolution density dimension Android

Try reboot device.
Start device with start button on side of phone.
Screen will go to light black color.
Long press Start button for menu:
Power off
Reboot
Airplane mode

Reboot item is in same level like Start button.
Click on the screen - (Hear a click)
Now find OK button , it is under Reboot item on right side of screen.
Press OK (Hear a click)
Wait a moment.
If device to do nothing , try short press Start button (sreen will black)
and again to press Start button. If screen go to light black color,
try again find Reboot item as written above.

Cross Button in EditText Android for deleting clearing text in EditText Example source code:
Example allow delete text in EditText by cross button, or do Button click performance.

main.xml type your package name and class
Put into drawable folder cross and ok image.

       <cz.okhelp.wiktionary.CustomEditText
            android:id="@+id/editTextZadejSlovo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="2"
            android:ems="10"
            android:hint="TypeAndPressGreen"
            android:singleLine="true"
            android:lines="1"
            android:maxLines="1" 
            android:drawableLeft="@drawable/cross"
            android:drawableRight="@drawable/ok" />
<!--button is invisible 0 height 0 width for performance click on button in EditText-->
        <Button
            android:id="@+id/btnGO"
            android:layout_width="0sp"
            android:layout_height="0sp"
            android:layout_weight="0"
            android:text="GO" />

CustomEditText.java

package cz.okhelp.wiktionary; // your package name

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Button;
import android.widget.EditText;

public class CustomEditText extends EditText
{
  private Drawable dLeft,dRight;
  private Rect lBounds,rBounds;
  private static Button btnOk;

  public CustomEditText(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }
  public CustomEditText(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
  public CustomEditText(Context context) {
    super(context);
  }

  @Override
  public void setCompoundDrawables(Drawable left, Drawable top,
      Drawable right, Drawable bottom)
  {
   if(left !=null) {
    	dLeft = left;
    }
   if(right !=null){
      dRight = right;
    } 
    
    super.setCompoundDrawables(left, top, right, bottom);
  }

	@Override
	public boolean onKeyUp(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_ENTER) {
    	btnOk.requestFocus();
    	btnOk.performClick();

		}
		return super.onKeyUp(keyCode, event);
	}
  
  @Override
  public boolean onTouchEvent(MotionEvent event)
  {
  	final int x = (int)event.getX();
  	final int y = (int)event.getY();

  	if(event.getAction() == MotionEvent.ACTION_UP && dLeft!=null) {
  		lBounds = dLeft.getBounds();
  		
  		int n1 = this.getLeft();
  		int n2 = this.getLeft()+lBounds.width();
  		int n3 = this.getPaddingTop();
  		int n4 = this.getHeight()-this.getPaddingBottom();
  		// leva strana
  		if(    x>=(this.getLeft()) 
  				&& x<=(this.getLeft()+lBounds.width())
  				&& y>=this.getPaddingTop() 
  				&& y<=(this.getHeight()-this.getPaddingBottom()))
  		{
  			this.setText("");
  			event.setAction(MotionEvent.ACTION_CANCEL);//use this to prevent the keyboard from coming up
  		}
  	}
  	if(event.getAction() == MotionEvent.ACTION_UP && dRight!=null)
    {
      rBounds = dRight.getBounds();
      int n1 = this.getRight()-rBounds.width();
      int n2 = this.getRight()-this.getPaddingRight();
      int n3 = this.getPaddingTop();
      int n4 = this.getHeight()-this.getPaddingBottom();
      // prava strana
      if(x>=(this.getRight()-rBounds.width()) && x<=(this.getRight()-this.getPaddingRight())
      		&& y>=this.getPaddingTop() && y<=(this.getHeight()-this.getPaddingBottom()))
      {
      	btnOk.requestFocus();
      	btnOk.performClick();
      	event.setAction(MotionEvent.ACTION_CANCEL);//use this to prevent the keyboard from coming up
      }
    }
    
    return super.onTouchEvent(event);
  }

  @Override
  protected void finalize() throws Throwable
  {
    dRight = null;
    rBounds = null;
    super.finalize();
  }
	public void setBtnOk(Button btnOk) {
		this.btnOk = btnOk;
	}
	public Button getBtnOk() {
		return btnOk;
	}
}  

YourActivity.java

//onCreate
        Button  mBtnGO = (Button)findViewById(R.id.btnGO);
        CustomEditText mEditZadani = (CustomEditText)this.findViewById(R.id.editTextZadejSlovo);
        mEditZadani.setBtnOk(mBtnGO);
        mBtnGO.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
             // do stuff for signInButtonClick
          }
        });

//android.okhelp.cz/wiktionary-aplikace-pro-android/

If on Android emulator home button pressed.

// button home presssed
19:37:06.727: INFO/ActivityManager(60): Starting: 
Intent { act=android.intent.action.MAIN cat=[android.intent.category.HOME] 
flg=0x10200000 cmp=com.android.launcher/com.android.launcher2.Launcher } from pid 60

19:37:06.807: INFO/onSaveInstanceState(339): onSaveInstanceState()
19:37:06.848: INFO/onPause(339): onPause()
19:37:07.968: INFO/onStop(339): onStop()

Diagram of Activity lifecycle if button HOME pressed

Co je to AMOLED displej?
AMOLED ( active-matrix organic light-emitting diode ) je zobrazovací technologie pro použití v mobilních zařízeních a televizích. OLED je technologie velmi tenkých displejů, kde organické sloučeniny vytváří elektroluminiscenční materiál a aktivní matice umožňuje přesné adresování jednotlivých pixelů (bodů obrázku).
Od roku 2012, je AMOLED technologie používána v mobilních telefonech , multimediálních přehrávačích a digitálních fotoaparátech, což umožňuje nízkou spotřebu těchto zařízení a zvětšení velikosti displeje (např. až 40 palců).

AMOLED displej se skládá z aktivní matice OLED pixelů, které vytvářejí světlo při elektrické aktivaci a jsou uloženy do Thin Film Transistor (TFT) pole, které slouží, jako řada přepínačů pro ovládání proudu pro každý jednotlivý pixel a tím se dosáhne požadované barvy bodu a snížení spotřeby produ pro pasivní provoz matice OLED.

V TFT sběrnici se používá polykrystalický a amorfní křemík což umožňuje dosáhnout pružnosti a ohebnosti AMOLED displeje.

Video AMOLED display Samsung Omnia II
**VIDEO YOUTUBE

Windows 7 64-bit version.
Eclipse 64-bit - Java was started but returned exit code=13

Solution:
Download and install 64-bit version of JDK
//www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html