ImageSwitcher

Tela

Java

package com.laioutes;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.animation.AnimationUtils;

import android.widget.AdapterView;

import android.widget.Gallery;

import android.widget.Gallery.LayoutParams;

import android.widget.ImageSwitcher;

import android.widget.ImageView;

import android.widget.ViewSwitcher;

public class LayoutsActivity extends Activity implements

         ViewSwitcher.ViewFactory {

 // Planetas

 private int[] imagens = { R.drawable.mercurio, R.drawable.venus,

                 R.drawable.terra, R.drawable.marte, R.drawable.jupiter,

                 R.drawable.saturno, R.drawable.urano, R.drawable.netuno,

                 R.drawable.plutao };

 private ImageSwitcher imageSwitcher;

 @Override

 public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.gridview);

         // Configura o ImageSwitcher e os efeitos

         imageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher);

         imageSwitcher.setFactory(this);

         imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,

                         android.R.anim.fade_in)); //  

         imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,

                         android.R.anim.fade_out)); //

         // Configura o adaptador da galeria

         Gallery g = (Gallery) findViewById(R.id.gallery);

         g.setAdapter(new AdaptadorImagem(this, imagens,

                         new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT,

                                         LayoutParams.WRAP_CONTENT)));

         g.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

                 public void onItemSelected(AdapterView parent, View v, int posicao,

                                 long id) {

                         // Avisa o ImageSwitcher que a imagem foi alterada

                         imageSwitcher.setImageResource(imagens[posicao]);

                 }

                 public void onNothingSelected(AdapterView parent) {

                 }

         });

 }

 // Implementa "ViewSwitcher.ViewFactory"

 public View makeView() {

         ImageView img = new ImageView(this);

         img.setBackgroundColor(0xFF000000);

         img.setScaleType(ImageView.ScaleType.FIT_CENTER);

         img.setLayoutParams(new ImageSwitcher.LayoutParams(

                         LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

         return img;

 }

}

xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:orientation="vertical" >

  <TextView

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Exemplo de ImageSwitcher" />

  <ImageSwitcher

      android:id="@+id/imageSwitcher"

      android:layout_width="305px"

      android:layout_height="305px"

      android:layout_alignParentBottom="true"

      android:layout_alignParentLeft="true" />

  <Gallery

      android:id="@+id/gallery"

      android:layout_width="fill_parent"

      android:layout_height="fill_parent"

      android:gravity="center" />

</LinearLayout>

AdaptadorImagem.java

package com.laioutes;

import android.content.Context;

import android.view.View;

import android.view.ViewGroup;

import android.view.ViewGroup.LayoutParams;

import android.widget.BaseAdapter;

import android.widget.ImageView;

public class AdaptadorImagem extends BaseAdapter {

 private Context ctx;

 private final int[] imagens;

 private final LayoutParams params;

 public AdaptadorImagem(Context c, int[] imagens, LayoutParams params) {

         this.ctx = c;

         this.imagens = imagens;

         this.params = params;

 }

 public int getCount() {

         return imagens.length;

 }

 public Object getItem(int posicao) {

         return posicao;

 }

 public long getItemId(int posicao) {

         return posicao;

 }

 public View getView(int posicao, View convertView, ViewGroup parent) {

         ImageView img = new ImageView(ctx);

         img.setImageResource(imagens[posicao]);

         img.setAdjustViewBounds(true);

         img.setLayoutParams(params);

         return img;

 }

}