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. */@Overridepublic 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{@Overridepublic 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() {@Overridepublic 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 stubreturn apps.size();}public Object getItem(int position) {// TODO Auto-generated method stubreturn apps.get(position);}public long getItemId(int position) {// TODO Auto-generated method stubreturn position;}public View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubImageView 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。