android抽屉实现

今天在手机上实现了抽屉效果，其实很简单，但是效果却很酷。

           首先在layout 下设置xml布局文件

       

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <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" > <GridView android:id="@+id/allApps" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/bk" android:columnWidth="60dp" android:gravity="center" android:horizontalSpacing="10dp" android:numColumns="auto_fit" android:padding="10dp" android:stretchMode="columnWidth" android:verticalSpacing="10dp" /> <ImageView android:id="@+id/imageViewIcon" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/touch_handler" /> </SlidingDrawer> </RelativeLayout>
        SlidingDrawer就是重要的抽屉控件 ，handle是抽屉的拖动按钮，content是抽屉中的内容。

      然后建立 chouti的activity类：

import android.app.Activity; import android.content.Intent; import android.content.pm.ResolveInfo; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.GridView; import android.widget.ImageView; import android.widget.SlidingDrawer; public class Chouti extends Activity { private GridView gv; private SlidingDrawer sd; private ImageView iv; private List<ResolveInfo> apps; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.slidingdrawer); loadApps(); gv = (GridView) findViewById(R.id.allApps); sd = (SlidingDrawer) findViewById(R.id.sliding); iv = (ImageView) findViewById(R.id.imageViewIcon); gv.setAdapter(new GridAdapter()); sd.setOnDrawerOpenListener(new SlidingDrawer.OnDrawerOpenListener()// 开抽屉 { @Override public void onDrawerOpened() { iv.setImageResource(R.drawable.touch_handler);// 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.setImageResource(R.drawable.touch_handler);// 响应关抽屉事件 } }); } 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(Chouti.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; } } }
loadApps方法是得到主界面上的图片和文字。

   然后设置的自定义adapter中去。

    看下运行后效果：

   

     向上滑动imageview按钮后：

  

   

    为了体现更好的效果，可以用两张滑动图片，一张朝上的，一张朝下的。根据监听器做相应的切换。