Dialog Yes No sample code

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to exit application?")
       .setCancelable(false)
       .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
                MyActivity.this.finish(); //Close  this Activity for example: MyActivity.java
           }
       })
       .setNegativeButton("No", new DialogInterface.OnClickListener() {
           public void onClick(DialogInterface dialog, int id) {
                // some code if you want
                dialog.cancel();
           }
       });
AlertDialog alert = builder.create();
alert.show();

If you have to type frequently the same code you can create templates which can be activate via autocomplete with Ctrl + Space.

For example lets assume setOnClickListener body.

To create a template for this select the menu Window->Preferences and Open Java -> Editor -> Templates

Type name of template in Eclipse s editor and pres Ctrl+Space

[caption id="attachment_1114" align="alignleft" width="300" caption="Eclipse-show-template-proposals"][/caption]

Select your template from intellisense help and press Enter or double click on selected item.

[caption id="attachment_1116" align="alignleft" width="300" caption="Eclipse - select your template"][/caption]

	mIdButtonHome.setOnClickListener(new View.OnClickListener() {
		public void onClick(View v) {
			Intent browserIntent = new Intent(Intent.ACTION_VIEW,
					Uri.parse("//android.okhelp.cz/category/software/"));
			startActivity(browserIntent);
		}
	});

Quick help in Eclipse editor: select keyword and press Ctrl+1

putString(), putBoolean(), putInt() etc.¨
How we can start an activity programmatically.

// MainActivity.java
//  myButton.setOnClickListener
Intent binary = new Intent(getApplicationContext(),Calculate.class);
	Bundle b = new Bundle();
	b.putString("prvni_label", "Decimal");
	b.putString("druhy_label", "Binary");
	b.putString("mode", "binary_to_decimal");
        binary.putExtras(b);
	startActivityForResult(binary, 0);
						
// in Calculate.java onCreate

   TextView mTextView1 = (TextView)findViewById(R.id.textView1);
   TextView mTextView2 = (TextView)findViewById(R.id.textView2);    
     Bundle _bundle = getIntent().getExtras();
		mTextView1.setText(_bundle.getString("prvni_label"));
		mTextView2.setText(_bundle.getString("druhy_label"));

//.................. HOW OPEN START NEW ACTIVITY WITHOUT A PARAMETER .........................

startActivity(new Intent(ThisActivity.this, NewActivity.class));

Table of usability of mobile phones with Android – February 2012 - (application Sky Map)

1	Samsung Galaxy S2	6.3%
2	HTC Desire HD	3.5%
3	HTC Evo 4G	3.4%
4	Samsung Galaxy Ace	2.1%
5	Samsung Galaxy S (SCH-I500)	2.1%
6	Samsung Galaxy S (GT-I9000)	2.1%
7	HTC Incredible 2	2.0%
8	Motorola Droid X	1.9%
9	Motorola Droid RAZR	1.9%
10	HTC Sensation 4G	1.7%

If you want save battery, select "Satelite map" from map menu and reduce the brightness of the display.