PopupWindow菜单+图像处理+ListView应用

相关API

PopupWindow
  PopupWindow(View contentView, int width, int height)
  构造方法, 指定包含的视图，宽度和高度
  
  showAsDropDown(View anchor, int xoff, int yoff)
  显示在指定视图的下面，指定视图，x轴和y轴上的偏移值
  
  setBackgroundDrawable(Drawable background)
  设置背景图片， 必须设置，不然动画没作用
  
  boolean isShowing() 
  判断是否正在显示
  
  dismiss()
  移除(显示界面上移除)

代码

package com.jane.graphics;

import android.graphics.drawable.Drawable;

/**
 * 应用信息的封装类
 */
public class AppInfo
{
  private Drawable icon;// 应用图标
  private String appName;// 应用名称
  private String packageName;// 包名

  public AppInfo(Drawable icon, String appName, String packageName)
  {
    super();
    this.icon = icon;
    this.appName = appName;
    this.packageName = packageName;
  }

  public AppInfo()
  {
    super();
  }

  public Drawable getIcon()
  {
    return icon;
  }

  public void setIcon(Drawable icon)
  {
    this.icon = icon;
  }

  public String getAppName()
  {
    return appName;
  }

  public void setAppName(String appName)
  {
    this.appName = appName;
  }

  public String getPackageName()
  {
    return packageName;
  }

  public void setPackageName(String packageName)
  {
    this.packageName = packageName;
  }

  @Override
  public String toString()
  {
    return "AppInfo [icon=" + icon + ", appName=" + appName
        + ", packageName=" + packageName + "]";
  }
}

package com.jane.graphics;

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.ScaleAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemLongClickListener,OnClickListener
{
  private ListView lv_main;
  private List<AppInfo> data;
  private AppAdapter adapter;

  private PopupWindow pw;
  private View pwView;

  @Override
  protected void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // 初始化成员变量
    lv_main = (ListView) findViewById(R.id.lv_main);
    data = getAllAppInfos();
    adapter = new AppAdapter();
    // 显示列表
    lv_main.setAdapter(adapter);

    // 给ListView设置item的点击监听
    lv_main.setOnItemClickListener(new OnItemClickListener()
    {
      /**
       * parent : ListView 
       * view : 当前行的item视图对象 
       * position : 当前行的下标
       */
      @Override
      public void onItemClick(AdapterView<?> parent, View view,int position, long id)
      {
        // 提示当前行的应用名称
        String appName = data.get(position).getAppName();
        // 提示
        // Toast.makeText(MainActivity.this, appName, 0).show();

        if (pw == null)
        {
          pwView = View.inflate(MainActivity.this,R.layout.pw_layout, null);
          // 得到子view设置点击监听
          pwView.findViewById(R.id.ll_pw_uninstall).setOnClickListener(MainActivity.this);
          pwView.findViewById(R.id.ll_pw_run).setOnClickListener(MainActivity.this);
          pwView.findViewById(R.id.ll_pw_share).setOnClickListener(MainActivity.this);

          pw = new PopupWindow(pwView, view.getWidth() - 80, view.getHeight());
          pw.setBackgroundDrawable(new BitmapDrawable());
        }

        // 如果正在显示, 移除
        if (pw.isShowing())
        {
          pw.dismiss();// 只是不显示了, 但对象仍然在内存中
        }

        // (再)显示
        pw.showAsDropDown(view, 40, -view.getHeight());

        // 缩放动画
        ScaleAnimation animation = new ScaleAnimation(0, 1, 0, 1);
        animation.setDuration(1000);
        // 启动动画
        pwView.startAnimation(animation);
      }
    });

    // 给LitView设置Item的长按监听
    lv_main.setOnItemLongClickListener(this);
    // 设置listView的滚动监听
    lv_main.setOnScrollListener(new OnScrollListener()
    {
      /*
       * SCROLL_STATE_IDLE : 空闲(不动)
       * SCROLL_STATE_TOUCH_SCROLL : 跟着手指滚动
       * SCROLL_STATE_FLING : 快速滚动
       */
      //当listView的滚动状态发生改变时调用,调用次数不是很多
      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState)
      {
        Log.e("TAG", "onScrollStateChanged()..." + scrollState);
        if (scrollState == OnScrollListener.SCROLL_STATE_TOUCH_SCROLL)
        {
          // 移除正在显示的pw
          if (pw != null && pw.isShowing())
          {
            pw.dismiss();
          }
        }
      }

      // 当listView正在滚动时调用(产生move时不断调用)
      @Override
      public void onScroll(AbsListView view,
          int firstVisibleItemPosition, int visibleItemCount,
          int totalItemCount)
      {
        Log.e("TAG", "onScroll()...");
      }
    });
  }
  
  class AppAdapter extends BaseAdapter
  {

    @Override
    public int getCount()
    {
      return data.size();
    }

    @Override
    public Object getItem(int position)
    {
      return data.get(position);
    }

    @Override
    public long getItemId(int position)
    {
      // TODO Auto-generated method stub
      return 0;
    }

    // 返回带数据当前行的Item视图对象
    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {

      // 1. 如果convertView是null, 加载item的布局文件
      if (convertView == null)
      {
        Log.e("TAG", "getView() load layout");
        convertView = View.inflate(MainActivity.this,R.layout.item_main, null);

      }
      // 2. 得到当前行数据对象
      AppInfo appInfo = data.get(position);
      // 3. 得到当前行需要更新的子View对象
      ImageView imageView = (ImageView) convertView.findViewById(R.id.iv_item_icon);
      TextView textView = (TextView) convertView.findViewById(R.id.tv_item_name);
      // 4. 给视图设置数据
      imageView.setImageDrawable(appInfo.getIcon());
      textView.setText(appInfo.getAppName());

      // 返回convertView
      return convertView;
    }
  }
  
  /*
   * 得到手机中所有应用信息的列表
   * AppInfo
   *  Drawable icon  图片对象
   *  String appName
   *  String packageName
   */
  protected List<AppInfo> getAllAppInfos()
  {
    List<AppInfo> list = new ArrayList<AppInfo>();
    // 得到应用的packgeManager
    PackageManager packageManager = getPackageManager();
    // 创建一个主界面的intent
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    // 得到包含应用信息的列表
    List<ResolveInfo> ResolveInfos = packageManager.queryIntentActivities(
        intent, 0);
    // 遍历
    for (ResolveInfo ri : ResolveInfos)
    {
      // 得到包名
      String packageName = ri.activityInfo.packageName;
      // 得到图标
      Drawable icon = ri.loadIcon(packageManager);
      // 得到应用名称
      String appName = ri.loadLabel(packageManager).toString();
      // 封装应用信息对象
      AppInfo appInfo = new AppInfo(icon, appName, packageName);
      // 添加到list
      list.add(appInfo);
    }
    return list;
  }


  @Override
  public boolean onItemLongClick(AdapterView<?> parent, View view,int position, long id)
  {
    // 删除当前行
    // 删除当前行的数据
    data.remove(position);
    // 更新列表
    // lv_main.setAdapter(adapter);//显示列表, 不会使用缓存的item的视图对象
    adapter.notifyDataSetChanged();// 通知更新列表, 使用所有缓存的item的视图对象
    return true;
  }

  @Override
  public void onClick(View v)
  {
    switch (v.getId())
    {
    case R.id.ll_pw_uninstall:
      pw.dismiss();
      Toast.makeText(this, "卸载", 0).show();
      break;
    case R.id.ll_pw_run:
      pw.dismiss();
      Toast.makeText(this, "运行", 0).show();
      break;
    case R.id.ll_pw_share:
      pw.dismiss();
      Toast.makeText(this, "分享", 0).show();
      break;

    default:
      break;
    }
  }
}

drawable对象

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    
    <item android:state_pressed="true">
        <shape>
            <solid android:color="#00ffff"></solid>
        </shape>
    </item>

</selector>

layout资源

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#c610ef"
        android:gravity="center"
        android:padding="5dp"
        android:text="所有应用"
        android:textColor="#ffffff"
        android:textSize="25sp" />

    <ListView
        android:id="@+id/lv_main"
        android:layout_width="match_parent"
        android:layout_height="fill_parent" >
    </ListView>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" 
    android:padding="5dp">

    <ImageView
        android:id="@+id/iv_item_icon"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/tv_item_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/iv_item_icon"
        android:layout_centerVertical="true"
        android:text="应用名称"
        android:layout_marginLeft="10dp"
        android:textSize="20sp"/>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:background="@drawable/local_popup_bg"
    android:orientation="horizontal"
    android:paddingLeft="20dp" >

    <LinearLayout
        android:id="@+id/ll_pw_uninstall"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical"
        android:background="@drawable/item_bg_selector" >

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/img1" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="卸载"
            android:textSize="16sp" />
    </LinearLayout>

    <View
        android:layout_width="1dp"
        android:layout_height="fill_parent"
        android:background="#00ff00" />

    <LinearLayout
        android:id="@+id/ll_pw_run"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical"
        android:background="@drawable/item_bg_selector" >

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/img2" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="运行"
            android:textSize="16sp" />
    </LinearLayout>

    <View
        android:layout_width="1dp"
        android:layout_height="fill_parent"
        android:background="#00ff00" />

    <LinearLayout
        android:id="@+id/ll_pw_share"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center"
        android:orientation="vertical" 
        android:background="@drawable/item_bg_selector">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/img3" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="分享"
            android:textSize="16sp" />
    </LinearLayout>
</LinearLayout>