菜鸟Android学习31——图片预览窗口

xml文件代码：

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <ImageSwitcher

        android:id="@+id/imageSwitcher1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:padding="20sp" >

    </ImageSwitcher>

 

    <GridView

        android:id="@+id/gridView1"

        android:layout_width="640sp"

        android:layout_height="match_parent"

        android:layout_marginTop="10sp"

        android:horizontalSpacing="3sp"

        android:verticalSpacing="3sp"

        android:numColumns="4" >  

    </GridView>

</LinearLayout>

activity_main。java文件代码

private int[] imageId = new int[]{R.drawable.image01,

   R.drawable.image02,R.drawable.image03,R.drawable.image04,

   R.drawable.image05,R.drawable.image06,R.drawable.image07,

   R.drawable.image08,R.drawable.image09,R.drawable.image10,

   R.drawable.image11,R.drawable.image12

 };

 private ImageSwitcher imageSwitcher;

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  

  imageSwitcher = (ImageSwitcher)findViewById(R.id.imageSwitcher1);

  imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_in));

  imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this, android.R.anim.fade_out));

  imageSwitcher.setFactory(new ViewFactory() {

   

   @Override

   public View makeView() {

    ImageView imageView = new ImageView(MainActivity.this);

    imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);

    imageView.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));

    

  

    // TODO Auto-generated method stub

    return imageView;

   }

  });

  imageSwitcher.setImageResource(imageId[5]);

  GridView gridView = (GridView)findViewById(R.id.gridView1);

  BaseAdapter adapter = new BaseAdapter() {

   

   @Override

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

    ImageView imageView;

    if(convertView == null){

     imageView = new ImageView(MainActivity.this);

//     设置图像的宽带和高度

     imageView.setAdjustViewBounds(true);

     imageView.setMaxHeight(150);

     imageView.setMaxWidth(150);

//     设置内边距

     imageView.setPadding(5, 5, 5, 5);

     }else{

      imageView = (ImageView)convertView;

     }

    imageView.setImageResource(imageId[position]);

    return imageView;

   }

   

   @Override

   public long getItemId(int position) {

    // TODO Auto-generated method stub

    return position;

   }

   

   @Override

   public Object getItem(int position) {

    // TODO Auto-generated method stub

    return position;

   }

   

   @Override

   public int getCount() {

    // TODO Auto-generated method stub

    return imageId.length;

   }

  };

  gridView.setAdapter(adapter);

  gridView.setOnItemClickListener(new OnItemClickListener() {

   @Override

   public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,

     long arg3) {

    imageSwitcher.setImageResource(imageId[arg2]);// TODO Auto-generated method stub

    

   }

   

  });

效果如下：