android书架效果

            以前也模仿者ireader实现了书架的效果,但是那种是使用listview实现的,并不好用。绝大多数都是用gridview实现的,网上这方面资料比较少,有些开源的电子书都是重点做了阅读,并没有像ireader和QQ阅读这样的书架效果。

           书架这种效果我早就实现了,本来想做一个完美的电子书,但是因为自己的懒惰,仅仅持续了一两天,今天又找到了以前的代码分享出来,希望大家能一起实现一个比较完美的开源的电子书。废话不多说先看下效果:

       

    本地部分还没有做,做好以后就可以吧本地的书加载到书架里了,这只是一个开始,后面还有很多复杂的没有做。

     下面先看一下书架的实现原理吧!

       首先看一下layout下的布局文件main.xml

   





	
	
     
        
	       
        

     上面是个自定义的gridview主要来实现书架,因为每一本书是一个item,在自定义的gridview中计算每一行的高度,然后把书架画上去。下面是个抽屉。

    

public class MyGridView extends GridView {

	private Bitmap background;

	public MyGridView(Context context, AttributeSet attrs) {
		super(context, attrs);
		background = BitmapFactory.decodeResource(getResources(),
				R.drawable.bookshelf_layer_center);
	}

	@Override
	protected void dispatchDraw(Canvas canvas) {
		int count = getChildCount();
		int top = count > 0 ? getChildAt(0).getTop() : 0;
		int backgroundWidth = background.getWidth();
		int backgroundHeight = background.getHeight()+2;
		int width = getWidth();
		int height = getHeight();

		for (int y = top; y < height; y += backgroundHeight) {
			for (int x = 0; x < width; x += backgroundWidth) {
				canvas.drawBitmap(background, x, y, null);
			}
		}

		super.dispatchDraw(canvas);
	}

}

    上面就是自定义书架的gridview,也是实现书架最核心的方法。

    然后是每一个item的布局:

   



    

      最后就可以在主activity中显示出来了。

  

public class BookShelfActivity extends BaseActivity {
    private GridView bookShelf;
    private int[] data = {
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,
			R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt,R.drawable.cover_txt
			
	};
    private String[] name={
    		"天龙八部","搜神记","水浒传","黑道悲情"
    };
    
    private GridView gv;  
    private SlidingDrawer sd;  
    private Button iv;  
    private List apps;  
    

	/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        
        bookShelf = (GridView) findViewById(R.id.bookShelf);
        ShlefAdapter adapter=new ShlefAdapter();
        bookShelf.setAdapter(adapter);
        bookShelf.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView arg0, View arg1, int arg2,
					long arg3) {
				// TODO Auto-generated method stub
				if(arg2>=data.length){
					
				}else{
				   Toast.makeText(getApplicationContext(), ""+arg2, Toast.LENGTH_SHORT).show();
				}
			}
		});
        loadApps();  
        gv = (GridView) findViewById(R.id.allApps);  
        sd = (SlidingDrawer) findViewById(R.id.sliding);  
        iv = (Button) findViewById(R.id.imageViewIcon);  
        gv.setAdapter(new GridAdapter());  
        sd.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener()// 开抽屉  
        {  
            @Override  
            public void onDrawerOpened() {  
            	iv.setText("返回");
                iv.setBackgroundResource(R.drawable.btn_local);// 响应开抽屉事件  
                                                                // ,把图片设为向下的  
            }  
        });  
        sd.setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener() {  
            @Override  
            public void onDrawerClosed() {  
            	iv.setText("本地");
                iv.setBackgroundResource(R.drawable.btn_local);// 响应关抽屉事件  
            }  
        });  
    }

    class ShlefAdapter extends BaseAdapter{

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return data.length+5;
		}

		@Override
		public Object getItem(int arg0) {
			// TODO Auto-generated method stub
			return arg0;
		}

		@Override
		public long getItemId(int arg0) {
			// TODO Auto-generated method stub
			return arg0;
		}

		@Override
		public View getView(int position, View contentView, ViewGroup arg2) {
			// TODO Auto-generated method stub
			
			contentView=LayoutInflater.from(getApplicationContext()).inflate(R.layout.item1, null);
			
			TextView view=(TextView) contentView.findViewById(R.id.imageView1);
			if(data.length>position){
				if(position
    代码写的有点乱,有待整理下,哈哈。
    上面只是一个画龙点睛的作用,真要实现一个好的电子书,后面还有跟多的工作,也希望有兴趣的朋友能在此基础上实现一个完美的电子书,然后把源代码开放,这样我就不用在往下做了,嘎嘎。

    最后附上源码下载地址:点击打开链接


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