Android开发之抽屉效果及ireader书架效果--SlidingDrawer

SlidingDrawer抽屉效果想必大家都见过了，本文就是阐述了关于SlidingDrawer的抽屉效果讲解：

1.简介：

SlidingDrawer隐藏屏外的内容，并允许用户通过handle以显示隐藏内容。它可以垂直或水平滑动，它有俩个View组成，其一是可以拖动的handle,其二是隐藏内容的View.它里面的控件必须设置布局，在布局文件中必须指定handle和content.

案例：

<SlidingDrawer  
        android:id="@+id/sliding"  
        android:layout_width="match_parent"  
        android:layout_height="match_parent"  
        android:content="@+id/allApps"  
        android:handle="@+id/imageViewIcon"  
        android:orientation="vertical" >  
        
	       
        <Button  
            android:id="@+id/imageViewIcon"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:text="本地"
            android:textSize="18dp"
            android:background="@drawable/btn_local" /> 
             
        <GridView  
            android:id="@+id/allApps"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:background="@drawable/file_list_bg"  
            android:columnWidth="60dp"  
            android:gravity="center"  
            android:horizontalSpacing="10dp"  
            android:numColumns="auto_fit"  
            android:padding="10dp"  
            android:stretchMode="columnWidth"  
            android:verticalSpacing="10dp" />  
      
    </SlidingDrawer>  
  

2.重要属性

android:allowSingleTap：指示是否可以通过handle打开或关闭
android:animateOnClick：指示是否当使用者按下手柄打开/关闭时是否该有一个动画。
android:content：隐藏的内容
android:handle：handle（手柄）

3.重要方法

animateClose()：关闭时实现动画。
close()：即时关闭
getContent()：获取内容
isMoving()：指示SlidingDrawer是否在移动。
isOpened()：指示SlidingDrawer是否已全部打开
lock()：屏蔽触摸事件。
setOnDrawerCloseListener(SlidingDrawer.OnDrawerCloseListener onDrawerCloseListener)：SlidingDrawer关闭时调用
unlock()：解除屏蔽触摸事件。
toggle()：切换打开和关闭的抽屉SlidingDrawer。

SlidingDrawer类使用的时候主要包括两点： 

1：handle：单击的按钮 

2：content：抽屉中的内容，单击按钮时，抽屉的内容隐藏或显示 

4.案例

重要代码查看

1.

package cn.com.karl.view;



import cn.com.karl.reader.R;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.widget.GridView;

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);
	}

}

2,

package cn.com.karl.reader;


import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.SlidingDrawer;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;


public class BookShelfActivity extends Activity {
    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<ResolveInfo> 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<name.length){
				   view.setText(name[position]);
				}
				view.setBackgroundResource(data[position]);
			}else{
				view.setBackgroundResource(data[0]);
				view.setClickable(false);
				view.setVisibility(View.INVISIBLE);
			}
			return contentView;
		}
    	
    }
    
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		// TODO Auto-generated method stub

		if (keyCode == KeyEvent.KEYCODE_BACK) {
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setMessage("你确定退出吗？")
					.setCancelable(false)
					.setPositiveButton("确定",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int id) {
									finish();
								}
							})
					.setNegativeButton("返回",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int id) {
									dialog.cancel();
								}
							});
			AlertDialog alert = builder.create();
			alert.show();
			return true;
		}

		return super.onKeyDown(keyCode, event);
	}
    
    
    private void loadApps() {  
        Intent intent = new Intent(Intent.ACTION_MAIN, null);  
        intent.addCategory(Intent.CATEGORY_LAUNCHER);  
  
        apps = getPackageManager().queryIntentActivities(intent, 0);  
    }  
  
    public class GridAdapter extends BaseAdapter {  
        public GridAdapter() {  
  
        }  
  
        public int getCount() {  
            // TODO Auto-generated method stub  
            return apps.size();  
        }  
  
        public Object getItem(int position) {  
            // TODO Auto-generated method stub  
            return apps.get(position);  
        }  
  
        public long getItemId(int position) {  
            // TODO Auto-generated method stub  
            return position;  
        }  
  
        public View getView(int position, View convertView, ViewGroup parent) {  
            // TODO Auto-generated method stub  
            ImageView imageView = null;  
            if (convertView == null) {  
                imageView = new ImageView(BookShelfActivity.this);  
                imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);  
                imageView.setLayoutParams(new GridView.LayoutParams(50, 50));  
            } else {  
                imageView = (ImageView) convertView;  
            }  
  
            ResolveInfo ri = apps.get(position);  
            imageView.setImageDrawable(ri.activityInfo  
                    .loadIcon(getPackageManager()));  
  
            return imageView;  
        }  
  
    }  

}

参考博客

http://blog.csdn.net/hellogv/article/details/6011934

不错的博客

源码下载

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