3 import android.content.Context;  4 import android.util.AttributeSet;  5 import android.view.View;  6 import android.widget.SlidingDrawer;  7   8 /**  9  * 使得SlidingDrawer在屏幕低端，而不会填满整个屏幕 10  */ 11 public class WrapSlidingDrawer extends SlidingDrawer { 12      13     private boolean mVertical; 14     private int mTopOffset; 15  16     // 从指定的XML定义的属性集创建一个新的WrapSlidingDrawer。 17     public WrapSlidingDrawer(Context context, AttributeSet attrs, int defStyle) { 18         super(context, attrs, defStyle); 19         /** 20          * namespace     属性的命名空间来获取。  21          * attribute     属性检索。 22          * defaultValue     如果未找到该属性返回什么。 23          *  24          * ORIENTATION_VERTICAL:定向垂直。 25          */ 26         int orientation = attrs.getAttributeIntValue("android", "orientation", 27                 ORIENTATION_VERTICAL); 28         // "topOffset" 额外偏移的把手在SlidingDrawer的顶部。 29         mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0); 30         mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL); 31     } 32  33     public WrapSlidingDrawer(Context context, AttributeSet attrs) { 34         super(context, attrs); 35         int orientation = attrs.getAttributeIntValue("android", "orientation", 36                 ORIENTATION_VERTICAL); 37         mTopOffset = attrs.getAttributeIntValue("android", "topOffset", 0); 38         mVertical = (orientation == SlidingDrawer.ORIENTATION_VERTICAL); 39     } 40  41     /** 42      * 测量视图和其内容，以确定所测量的宽度和所测量的高度。 43      * widthMeasureSpec   宽度测量规格。 44      * heightMeasureSpec  高度测量规格。 45      */ 46     @Override   47     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 48         int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); 49         int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); 50         int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); 51         int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); 52         // 返回抽屉的手柄。  53         final View handle = getHandle(); 54         // 返回抽屉的内容。  55         final View content = getContent(); 56         /** 57          * Ask one of the children of this view to measure itself, taking into 58          * account both the MeasureSpec requirements for this view and its padding. 59          * The heavy lifting is done in getChildMeasureSpec. 60          * 61          * @param child The child to measure 62          * @param parentWidthMeasureSpec The width requirements for this view 63          * @param parentHeightMeasureSpec The height requirements for this view 64          */ 65         measureChild(handle, widthMeasureSpec, heightMeasureSpec); 66  67         if (mVertical) { 68             // 测量高度 - 抽屉手柄高度 - 额外偏移的把手顶部 69             int height = heightSpecSize - handle.getMeasuredHeight() 70                     - mTopOffset; 71             // 内容尺寸 72             // public static int makeMeasureSpec (int size, int mode) 73             // Creates a measure specification based on the supplied size and mode. 74             //   size    the size of the measure specification 75             //   mode    the mode of the measure specification 76             content.measure(widthMeasureSpec, 77                     MeasureSpec.makeMeasureSpec(height, heightSpecMode)); 78             // 79             heightSpecSize = handle.getMeasuredHeight() + mTopOffset 80                     + content.getMeasuredHeight(); 81             // 82             widthSpecSize = content.getMeasuredWidth(); 83             // 84             if (handle.getMeasuredWidth() > widthSpecSize) 85                 widthSpecSize = handle.getMeasuredWidth(); 86         } else { 87             int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset; 88             getContent().measure( 89                     MeasureSpec.makeMeasureSpec(width, widthSpecMode), 90                     heightMeasureSpec); 91             widthSpecSize = handle.getMeasuredWidth() + mTopOffset 92                     + content.getMeasuredWidth(); 93             heightSpecSize = content.getMeasuredHeight(); 94             if (handle.getMeasuredHeight() > heightSpecSize) 95                 heightSpecSize = handle.getMeasuredHeight(); 96         } 97         // 此方法必须由onMeasure（int，int）被调用储存的测量宽度和高度测量。 98         setMeasuredDimension(widthSpecSize, heightSpecSize); 99     }100 }

 1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     android:layout_width="fill_parent" 4     android:layout_height="fill_parent" > 5  6     <TextView 7         android:id="@+id/text_view" 8         android:layout_width="fill_parent" 9         android:layout_height="wrap_content"10         android:layout_marginTop="10dip"11         android:gravity="center"12         android:text="AAAAAAAAAAAAAA"13         android:textSize="10pt" />14 15     <com.cn.daming.WrapSlidingDrawer16         android:id="@+id/sliding_drawer"17         android:layout_width="fill_parent"18         android:layout_height="wrap_content"19         android:content="@+id/mycontent"20         android:handle="@+id/layout1"21         android:layout_alignParentBottom="true"22         android:orientation="vertical" >23 24         <LinearLayout25             android:id="@id/layout1"26             android:layout_width="wrap_content"27             android:layout_height="wrap_content"28             android:background="#00000000"29             android:gravity="center" >30 31             <ImageView32                 android:id="@+id/my_image"33                 android:layout_width="wrap_content"34                 android:layout_height="wrap_content"35                 android:src="@drawable/up1" />36         </LinearLayout>37 38         <GridView39             android:id="@id/mycontent"40             android:layout_width="wrap_content"41             android:layout_height="wrap_content"42             android:background="#ff000000"43             android:gravity="center"44             android:numColumns="3"45             android:paddingTop="20dip" />46     </com.cn.daming.WrapSlidingDrawer>47 48 </RelativeLayout>

 3 import android.app.Activity; 4 import android.content.res.Configuration; 5 import android.os.Bundle; 6 import android.view.View; 7 import android.widget.GridView; 8 import android.widget.ImageView; 9 import android.widget.SlidingDrawer;10 import android.widget.TextView;11 12 public class SlidingDrawerMainActivity extends Activity {13 14     private GridView gridView;15     private SlidingDrawer slidingDrawer;16     private ImageView imageView;17     private TextView textview;18     private int[] icons = { R.drawable.title1, R.drawable.title2,19             R.drawable.title3, R.drawable.title4, R.drawable.title5,20             R.drawable.title6 };21 22     private String[] items = { "Phone", "Message", "AddImage", "Music",23             "Telephone", "SMS" };24 25     @Override26     public void onCreate(Bundle savedInstanceState) {27         super.onCreate(savedInstanceState);28         29         setContentView(R.layout.main);30         31         gridView = (GridView) findViewById(R.id.mycontent);32         slidingDrawer = (SlidingDrawer) findViewById(R.id.sliding_drawer);33         imageView = (ImageView) findViewById(R.id.my_image);34         textview = (TextView) findViewById(R.id.text_view);35         MyGridViewAdapter adapter = new MyGridViewAdapter(this, items, icons);36         gridView.setAdapter(adapter);37         38         slidingDrawer39                 .setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener() {40 41                     public void onDrawerOpened() {42                         textview.setVisibility(View.GONE);43                         imageView.setImageResource(R.drawable.down1);44                     }45                 });46         slidingDrawer47                 .setOnDrawerCloseListener(new SlidingDrawer.OnDrawerCloseListener() {48 49                     public void onDrawerClosed() {50                         textview.setVisibility(View.VISIBLE);51                         imageView.setImageResource(R.drawable.up1);52                     }53                 });54     }55 56     @Override57     public void onConfigurationChanged(Configuration newConfig) {58         super.onConfigurationChanged(newConfig);59     }60 }