Android项目实战--手机卫士21--运行应用以及美化PopupWindow
好啦，我们昨天就已经把用户里面所有的应用都可以读取出来了，所以，今天我们就把那些逻辑写一下，我们今天主要写的就是，点击那些应用的条目时，会弹出一个PopupWindow，上面有三个菜单，一个是运行，一个是卸载，和个是分享，今天我们就把PopupWindow和运行的逻辑写一下，先来看一下效果
上面那些弹出来的窗体，其实就是Android里面的PopupWindow这样一个组件来的，现在我们就来熟悉一下它是怎么用的。
要做成这样一个窗体，肯定就有一个布局文件啦，所以我们就先写一下布局文件
popup_item.xml
package com.xiaobin.security.ui;import java.util.List;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.content.pm.ActivityInfo;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.graphics.Color;import android.graphics.drawable.ColorDrawable;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.Gravity;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.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.TextView;import android.widget.Toast;import com.xiaobin.security.R;import com.xiaobin.security.domain.AppInfo;import com.xiaobin.security.engine.AppInfoProvider;public class AppManagerActivity extends Activity implements OnClickListener{private static final int GET_ALL_APP_FINISH = 1;private ListView lv_app_manager;private LinearLayout ll_app_manager_progress;private AppInfoProvider provider;private AppManagerAdapter adapter;private PopupWindow popupWindow;private List<AppInfo> list;@SuppressLint("HandlerLeak")private Handler handler = new Handler(){public void handleMessage(Message msg) {switch(msg.what){case GET_ALL_APP_FINISH : //进度条设置为不可见ll_app_manager_progress.setVisibility(View.GONE);adapter = new AppManagerAdapter();lv_app_manager.setAdapter(adapter);break;default : break;}};};@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.app_manager);lv_app_manager = (ListView) findViewById(R.id.lv_app_manager);ll_app_manager_progress = (LinearLayout) findViewById(R.id.ll_app_manager_progress);ll_app_manager_progress.setVisibility(View.VISIBLE);//因为搜索手机里面的应用程序有可能是非常耗时的，所以我们开启一个新的线程去进行搜索//当搜索完成之后，就把一个成功的消息发送给Handler，然后handler把搜索到的数据设置进入listview里面new Thread(){public void run() {provider = new AppInfoProvider(AppManagerActivity.this);list = provider.getAllApps();Message msg = new Message();msg.what = GET_ALL_APP_FINISH;handler.sendMessage(msg);};}.start();lv_app_manager.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id){dismissPopupWindow();//用来存放当前的item的坐标值，第一个是x的坐标，第二个是y的坐标int[] location = new int[2];//把当前的item的坐标值放到int数组里面view.getLocationInWindow(location);View popupView = View.inflate(AppManagerActivity.this, R.layout.popup_item, null);LinearLayout ll_app_uninstall = (LinearLayout) popupView.findViewById(R.id.ll_app_uninstall);LinearLayout ll_app_run = (LinearLayout) popupView.findViewById(R.id.ll_app_start);LinearLayout ll_app_share = (LinearLayout) popupView.findViewById(R.id.ll_app_share);ll_app_uninstall.setOnClickListener(AppManagerActivity.this);ll_app_run.setOnClickListener(AppManagerActivity.this);ll_app_share.setOnClickListener(AppManagerActivity.this);//拿到当时点击的条目，并设置到view里面AppInfo info = (AppInfo) lv_app_manager.getItemAtPosition(position);ll_app_uninstall.setTag(info);ll_app_run.setTag(info);ll_app_share.setTag(info);//添加动画LinearLayout ll_app_popup = (LinearLayout) popupView.findViewById(R.id.ll_app_popup);ScaleAnimation scaleAnimation = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f);scaleAnimation.setDuration(300);//new 一个PopupWindow出来popupWindow = new PopupWindow(popupView, 230, 70);//一定要给PopupWindow设置一个背景图片，不然的话，会有很多未知的问题的//如没办法给它加上动画，还有显示会有问题等，//如果我们没有要设置的图片，那么我们就给它加上了一个透明的背景图片Drawable drawable = new ColorDrawable(Color.TRANSPARENT);popupWindow.setBackgroundDrawable(drawable);int x = location[0] + 60;int y = location[1];//把PopupWindow显示出来popupWindow.showAtLocation(view, Gravity.LEFT | Gravity.TOP, x, y);//开启动画ll_app_popup.startAnimation(scaleAnimation);}});//当listview滚动的时候调用的方法lv_app_manager.setOnScrollListener(new OnScrollListener(){@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState){dismissPopupWindow();}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount){dismissPopupWindow();}});}//判断PopupWindow是不是存在，存在就把它dismiss掉private void dismissPopupWindow(){if(popupWindow != null){popupWindow.dismiss();popupWindow = null;}}@Overridepublic void onClick(View v){AppInfo item = (AppInfo) v.getTag();switch(v.getId()){case R.id.ll_app_uninstall : if(item.isSystemApp()){Toast.makeText(AppManagerActivity.this, "不能卸载系统的应用程序", Toast.LENGTH_SHORT).show();}else{}break;case R.id.ll_app_start : try{//拿到这个包对应的PackageInfo对象，这里我们指定了两个flag，//一个就是之前讲过的，所有的安装过的应用程序都找出来，包括卸载了但没清除数据的//一个就是指定它去扫描这个应用的AndroidMainfest文件时候的activity节点，//这样我们才能拿到具有启动意义的ActivityInfo，如果不指定，是无法扫描出来的PackageInfo packageInfo = getPackageManager().getPackageInfo(item.getPackageName(), PackageManager.GET_UNINSTALLED_PACKAGES | PackageManager.GET_ACTIVITIES);//扫描出来的所以activity节点的信息ActivityInfo[] activityInfos = packageInfo.activities;//有些应用是无法启动的，所以我们就要判断一下if(activityInfos != null && activityInfos.length > 0){//在扫描出来的应用里面，第一个是具有启动意义的ActivityInfo startActivity = activityInfos[0];//设置好Intent，启动activityIntent intent = new Intent();intent.setClassName(item.getPackageName(), startActivity.name);startActivity(intent);}else{Toast.makeText(AppManagerActivity.this, "这个应用程序无法启动", Toast.LENGTH_SHORT).show();}}catch (NameNotFoundException e){e.printStackTrace();}break;case R.id.ll_app_share : break;default : break;}dismissPopupWindow();}//======================================================================private class AppManagerAdapter extends BaseAdapter{@Overridepublic int getCount(){return list.size();}@Overridepublic Object getItem(int position){return list.get(position);}@Overridepublic long getItemId(int position){return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent){AppInfo info = list.get(position);if(convertView == null){View view = View.inflate(AppManagerActivity.this, R.layout.app_manager_item, null);AppManagerViews views = new AppManagerViews();views.iv_app_icon = (ImageView) view.findViewById(R.id.iv_app_manager_icon);views.tv_app_name = (TextView) view.findViewById(R.id.tv_app_manager_name);views.iv_app_icon.setImageDrawable(info.getIcon());views.tv_app_name.setText(info.getAppName());view.setTag(views);return view;}else{AppManagerViews views = (AppManagerViews) convertView.getTag();views.iv_app_icon.setImageDrawable(info.getIcon());views.tv_app_name.setText(info.getAppName());return convertView;}}}//用来优化listview的类private class AppManagerViews{ImageView iv_app_icon;TextView tv_app_name;}}好啦，今天就讲到这里了，今天的代码量比较少，但是很重要，都是新东西，大家可以认真看看，明天我们再讲卸载和分享的功能
今天源码下载