安卓app_sl4_10幻灯片式图片浏览器淡入淡出的效果-动画效果

安卓app_sl4_10幻灯片式图片浏览器淡入淡出的效果-动画效果

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="Gallery">
        <attr name="android:galleryItemBackground" />
    </declare-styleable>
    
</resources>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center_horizontal"
    android:id="@+id/llayout"
    tools:context="com.example.sl4_10.MainActivity" >

    <ImageSwitcher
        android:id="@+id/imageSwitcher1"
        android:layout_weight="2"
        android:paddingTop="30dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
    </ImageSwitcher>

    <Gallery
        android:id="@+id/gallery1"
        android:spacing="5dp"
        android:layout_weight="1"
        android:unselectedAlpha="0.6"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

package com.example.sl4_10;

import android.app.Activity;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.TableRow.LayoutParams;
import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity {
    private int[] imageId=new int[]{R.drawable.img01,
            R.drawable.img02,
            R.drawable.img03,
            R.drawable.img04,
            R.drawable.img05,
            R.drawable.img06,
            R.drawable.img07,
            R.drawable.img08,
            R.drawable.img09,
            R.drawable.img10,
            R.drawable.img11,
            R.drawable.img12,};
    private ImageSwitcher imageSwitcher;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Gallery gallery=(Gallery) findViewById(R.id.gallery1);
        imageSwitcher =(ImageSwitcher) findViewById(R.id.imageSwitcher1);
        //为图像设置淡入淡出的效果
        imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_in));
        imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
                android.R.anim.fade_out));
        imageSwitcher.setFactory(new ViewFactory(){

            @Override
            public View makeView() {
                // TODO Auto-generated method stub
                ImageView imageView = new ImageView(MainActivity.this);
                imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);//保持纵横比
                imageView.setLayoutParams(new ImageSwitcher.LayoutParams(
                        LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT
                        ));
                return imageView;
            }
            
        });
        BaseAdapter adapter = new BaseAdapter(){

            @Override
            public int getCount() {
                // TODO Auto-generated method stub
                return imageId.length;
            }

            @Override
            public Object getItem(int position) {
                // TODO Auto-generated method stub
                return position;
            }

            @Override
            public long getItemId(int position) {
                // TODO Auto-generated method stub
                return position;
            }

            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                // TODO Auto-generated method stub
                ImageView imageview = null;
                if(imageview == null)
                {
                    imageview = new ImageView(MainActivity.this);
                    imageview.setScaleType(ImageView.ScaleType.FIT_XY);
                    imageview.setLayoutParams(new Gallery.LayoutParams(100,135));
                    TypedArray typedArray=obtainStyledAttributes(R.styleable.Gallery);
                    imageview.setBackgroundResource(typedArray.getResourceId(R.styleable.Gallery_android_galleryItemBackground, 0));
                    imageview.setPadding(5, 0, 5, 0);
                }
                else
                {
                    imageview=(ImageView) convertView;
                }
                imageview.setImageResource(imageId[position]);
                    
    
                return imageview;
            }
            
        };
        gallery.setAdapter(adapter);
        gallery.setSelection(imageId.length / 2);
        gallery.setOnItemSelectedListener(new OnItemSelectedListener(){

            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                // TODO Auto-generated method stub
                imageSwitcher.setImageResource(imageId[position]);
                
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub
                
            }
            
        });
    }

    @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;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}