Android开发学习之WallPaper设置壁纸详细介绍与实例

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="#000000"
    tools:context=".MainActivity" >
    <ImageSwitcher
        android:id="@+id/ImageSwitcher"
        android:layout_width="fill_parent"
        android:layout_height="370dp">
    </ImageSwitcher>
    <Gallery
        android:id="@+id/Gallery"
        android:layout_width="fill_parent"
        android:layout_height="80dp"
        android:layout_below="@+id/ImageSwitcher"  />
    <Button
        android:id="@+id/BtnGo"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:layout_below="@+id/Gallery"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="@string/BtnGo" />
</RelativeLayout>

 package com.android.gallery2switcher;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter{

 //类成员myContext为context父类
 private Context myContext;
 private int[] myImages;

 //构造函数，有两个参数，即要存储的Context和Images数组
 public ImageAdapter(Context c,int[] Images)
 {
  // TODO Auto-generated constructor stub
  this.myContext=c;
  this.myImages=Images;
 }

 //返回所有的图片总数量
 @Override
 public int getCount()
 {

  return this.myImages.length;
 }

 //利用getItem方法，取得目前容器中图像的数组ID
 @Override
 public Object getItem(int position)
 {
  return position;
 }

 @Override
 public long getItemId(int position)
 {
  return position;
 }

 //取得目前欲显示的图像的VIEW，传入数组ID值使之读取与成像
 @Override
 public View getView(int position, View convertView, ViewGroup parent)
 {
  ImageView image=new ImageView(this.myContext);
  image.setImageResource(this.myImages[position]);
  image.setScaleType(ImageView.ScaleType.FIT_XY);
  image.setAdjustViewBounds(true);
  return image;
 }

}
 

 package com.android.gallery2switcher;

import java.io.IOException;

import android.os.Bundle;
import android.app.Activity;
import android.app.WallpaperManager;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.animation.AnimationUtils;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageSwitcher;
import android.widget.ImageView;
import android.widget.ViewSwitcher.ViewFactory;

public class MainActivity extends Activity {

 Gallery mGallery;
 ImageSwitcher mSwitcher;
 Button BtnGo;
 int[] Resources=new int[]{R.drawable.image0,R.drawable.image1,R.drawable.image2,R.drawable.image3,
   R.drawable.image4,R.drawable.image5,R.drawable.image6,R.drawable.image7,R.drawable.image8};
 int index;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  //不显示标题栏
  requestWindowFeature(Window.FEATURE_NO_TITLE);
  setContentView(R.layout.activity_main);
  mGallery=(Gallery)findViewById(R.id.Gallery);
  mSwitcher=(ImageSwitcher)findViewById(R.id.ImageSwitcher);
  //实现ImageSwitcher的工厂接口
    mSwitcher.setFactory(new ViewFactory()
    {
     @Override
     public View makeView()
     {
        ImageView i = new ImageView(MainActivity.this);
        i.setBackgroundColor(0xFF000000);
        i.setScaleType(ImageView.ScaleType.FIT_CENTER);
        i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        return i;
     }
    });
     //设置资源
     mSwitcher.setImageResource(Resources[0]);
     //设置动画
     mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));
     mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));
  BtnGo=(Button)findViewById(R.id.BtnGo);
  BtnGo.setOnClickListener(new OnClickListener()
  {
   @Override
   public void onClick(View arg0)
   {
    SetWallPaper();
   }
  });
  ImageAdapter mAdapter=new ImageAdapter(this,Resources);
  mGallery.setAdapter(mAdapter);
  mGallery.setOnItemSelectedListener(new OnItemSelectedListener()
  {
   @Override
   public void onItemSelected(AdapterView<?> Adapter, View view,int position, long id)
   {
    //设置图片
    mSwitcher.setImageResource(Resources[position]);
    //获取当前图片索引
    index=position;
   }
   @Override
   public void onNothingSelected(AdapterView<?> arg0)
   {

   }

  });

      
 }
 //设置壁纸
    public void SetWallPaper()
    {
     WallpaperManager mWallManager=WallpaperManager.getInstance(this);
     try
     {
   mWallManager.setResource(Resources[index]);
  }
     catch (IOException e)
     {
   e.printStackTrace();
  }
    }

 @Override
 public boolean onCreateOptionsMenu(Menu menu)
 {
  return true;
 }

}