MainActivity.java

package net.sgoliver.android.toast;

import android.os.Bundle;
import android.app.Activity;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	
	private Button btnDefecto = null;
	private Button btnGravity = null;
	private Button btnLayout = null;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		btnDefecto = (Button)findViewById(R.id.btnPorDefecto);
        btnGravity = (Button)findViewById(R.id.btnGravity);
        btnLayout = (Button)findViewById(R.id.btnLayout);
        
        btnDefecto.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Toast toast1 = 
					Toast.makeText(getApplicationContext(), "Toast por defecto", Toast.LENGTH_SHORT);	
				
				toast1.show();
			}
		});
        
        btnGravity.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Toast toast2 = 
					Toast.makeText(getApplicationContext(), "Toast con gravity", Toast.LENGTH_SHORT);	
				
				toast2.setGravity(Gravity.CENTER|Gravity.LEFT,0,0);
				toast2.show();
			}
		});
        
        btnLayout.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				Toast toast3 = new Toast(getApplicationContext());
				
				LayoutInflater inflater = getLayoutInflater();
				View layout = inflater.inflate(R.layout.toast_layout,
						(ViewGroup) findViewById(R.id.lytLayout));

				TextView txtMsg = (TextView)layout.findViewById(R.id.txtMensaje);
				txtMsg.setText("Toast Personalizado");
				
				toast3.setDuration(Toast.LENGTH_SHORT);
				toast3.setView(layout);
				toast3.show();
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}