Dialog显示手机android安装的app信息

最近做功能开发时候需要显示当前手机安装的app信息.这里我使用Dialog来显示.截图如下:



如上截图所示,这个dialog显示了当前手机安装的app,当点击一个菜单项时候就会在上面显示一个上锁的图案(如上图:视频/相机/联系人).这时一个可以对app上锁的设计界面.

首先来看看dialog的创建:

private void Init_create_dialog(){
		if(null == show_app_dialog){
			show_app_dialog = new Dialog(getActivity()){
				protected void onStop() {
					super.onStop();
					FingerPrint_Utils.FingerPrint_save_LockApp(getActivity());
				}

			};
			show_app_dialog.setContentView(R.layout.finger_gride_app_choose);
			show_app_dialog.setTitle(R.string.finger_print_set_unlock_app_title);
			GridView gvApp = ((GridView)show_app_dialog.findViewById(R.id.gv_app));
			final List<FingerPrintApplicationInfo> list = FingerPrint_Utils.get_LockApplicationInfoList();
			gvApp.setAdapter(new AppChooseAdapter(list));

			gvApp.setOnItemClickListener(new AdapterView.OnItemClickListener(){
					public void onItemClick(AdapterView<?> parent, View view, int position, long id){
							FingerPrintApplicationInfo Fingerappinfo = (FingerPrintApplicationInfo)parent.getItemAtPosition(position);
							ResolveInfo appinfo = Fingerappinfo.launcher_activity;
							//CharSequence name = appinfo.loadLabel(package_manager);
							AppChooseAdapter.ViewHolder hold = (AppChooseAdapter.ViewHolder) view.getTag();
							if(Fingerappinfo.locked){
								hold.app_icon.setImageResource(0);
								Fingerappinfo.locked = false;
								FingerPrint_Utils.FingerPrint_Dele_LockApp(appinfo.activityInfo.packageName);//activityInfo.packageName
							}else{
								hold.app_icon.setImageResource(R.drawable.lock_app_icon);
								Fingerappinfo.locked = true;
								FingerPrint_Utils.FingerPrint_AddNew_LockApp(appinfo.activityInfo.packageName);
							}
							//selected_str = appinfo.packageName;
							//if(DEBUG) Log.d(TAG,"FingerPrintSettingMain:  name="+name+"; appinfo.packageName="+appinfo.packageName);
							//show_app_dialog.dismiss();
						}
				});
			/*
            show_app_dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
                public void onDismiss(final DialogInterface dialog) {
					FingerPrint_Utils.FingerPrint_save_LockApp(getActivity());
                }
            });*/

			show_app_dialog.getWindow().setCloseOnTouchOutside(true);
			show_app_dialog.setCanceledOnTouchOutside(true);
		}
	}

再看看其layout的文件:finger_gride_app_choose.xml

<?xml version="1.0" encoding="utf-8"?>

<GridView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gv_app"
	android:layout_width="match_parent" 
	android:layout_height="match_parent"
    android:numColumns="3" 
    android:padding="10dp"
    android:verticalSpacing="10dp"
    android:horizontalSpacing="10dp"
    android:gravity="center"
    />

实际上就是一个GridView,所以整个界面的重点其实就是这个GridView的Adapter设计.所以看看这个Adapter:AppChooseAdapter

class AppChooseAdapter extends BaseAdapter{
	    private List<FingerPrintApplicationInfo> applicationInfos;
	    private PackageManager pm;
		class ViewHolder {
		 TextView app_name;
		 ImageView app_icon;
		 //ImageView locked_icon;
		}

	    public AppChooseAdapter(List<FingerPrintApplicationInfo> list){
	        applicationInfos = list;
	    }

	    public int getCount(){
	        return applicationInfos.size();
	    }

	    public Object getItem(int position){
	        return applicationInfos.get(position);
	    }

	    public long getItemId(int position){
	        return position;
	    }

	    public View getView(int position, View view, ViewGroup parent){
	        //PackageManager pm = package_manager;

	        final ViewHolder hold;
	        if (view == null){
				if(DEBUG) Log.d(TAG,"AppChooseAdapter:   (view == null) position="+position);
				Context context = parent.getContext();
				view = LayoutInflater.from(context).inflate(R.layout.item_app_gride, null);
				hold = new ViewHolder();
				hold.app_icon = (ImageView)view.findViewById(R.id.iv_icon);
				//hold.locked_icon = (ImageView)view.findViewById(R.id.lock_statu_img);
				hold.app_name = (TextView)view.findViewById(R.id.tv_name);
				view.setTag(hold);

			}else{
				if(DEBUG) Log.d(TAG,"AppChooseAdapter:   (view != null) position="+position);
				hold = (ViewHolder) view.getTag();
			}

			final int curr_position = position;
			view.post(new Runnable() {
					
					public void run() {
						//ViewHolder hold = (ViewHolder) view.getTag();
						PackageManager pm = package_manager;
						if(hold != null){
							FingerPrintApplicationInfo aInfo = (FingerPrintApplicationInfo)applicationInfos.get(curr_position);
							String package_name = aInfo.launcher_activity.activityInfo.packageName;//aInfo.app.packageName;
							if(aInfo.locked){
								hold.app_icon.setImageResource(R.drawable.lock_app_icon); 
							}else{
								hold.app_icon.setImageResource(0); 
							}
							hold.app_name.setText(aInfo.launcher_activity.loadLabel(pm));
							hold.app_icon.setBackgroundDrawable(aInfo.launcher_activity.loadIcon(pm)); //image.setImageDrawable(aInfo.app.loadIcon(pm));

						}
					}
				});
	        return view;
	    }
	}

上面已经贴出了基本所有代码.下面做一下说明:

(1)每一次显示这个dialog都会一点延时,如何解决这个问题.我有了两个办法来解决:

首先,加载手机安装的app信息,我会在显示这个dialog之前就加载好,然后只需要通过FingerPrint_Utils.get_LockApplicationInfoList()来获取就可以.其中加载app信息使用AsyncTask来完成的.AsyncTask的使用比较简单了,这里我只给出加载app的信息的代码:

    private static ArrayList<FingerPrintApplicationInfo> getInstalledLaunchableApps(FingerPrintSettingMain.AppLabelComparator mcomparator){
        final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        
        PackageManager pm = mcomparator.getPackageManager();
        List list = pm.queryIntentActivities(mainIntent, 0);//查询获取安装的所有app
        
        ArrayList<FingerPrintApplicationInfo> array = new ArrayList<FingerPrintApplicationInfo>();
        ArrayList<FingerPrintApplicationInfo> array1 = new ArrayList<FingerPrintApplicationInfo>();
        
        int size = list.size();
        String[] APP_DELE = ALL_APP_DELE_PACKAGENAME;
        String[] LOCK_APP_DELE = LOCK_APP_DELE_PACKAGENAME;
        //Log.d(TAG,"getInstalledLaunchableApps: size="+size);
        boolean has = false;
        String locked_packagename = app_locked_PackageName!=null?app_locked_PackageName.toString():null;
        ResolveInfo curr;
        for (int i=0; i<size; i++){
            has = false;
            curr = (ResolveInfo)list.get(i);
            if(null == curr){ 
                continue;
            }
            String str = curr.activityInfo.packageName;
            if(!wei_xing_install && 0 == weixing_package.compareTo(str)){//检测是否安装微信
                wei_xing_install = true;
            }
            Iterator iterator = array.iterator();

            if(null != APP_DELE){
                for(int j = 0; j < APP_DELE.length; j++){//有一些app不需要在这里显示,过滤掉一些app
                    if(APP_DELE[j].compareTo(str) == 0){
                        has = true;
                    }
                }
            }
            if(has) continue;

                FingerPrintApplicationInfo app = new FingerPrintApplicationInfo();
                app.launcher_activity = curr;
                if(locked_packagename != null && locked_packagename.indexOf(str)>-1){ 
                    app.locked = true;
                }
                
                array.add(app);
                if(null != LOCK_APP_DELE){
                    for(int n = 0; n < LOCK_APP_DELE.length; n++){
                        if(LOCK_APP_DELE
.compareTo(str) == 0){
                            has = true;
                        }
                    }
                }
                if(has) continue;
                array1.add(app);
        }
        
        Collections.sort(array, mcomparator);
        Collections.sort(array1, mcomparator);
        if(array1 != null){
            unlock_pacakegename_app_dele = array1;
        }
        return array;
    }

即使在显示dialog之前就加载好app信息,在显示dialog时候也会有一个较长的延迟,这是因为加载每一个app的icon和text_name也是需要时间的.所以,如上面的代码AppChooseAdapter的getView中我使用了view.post(new Runnable())的方法来加载显示的信息.

(2)如何实现点击一个app菜单选项时候能够在上面显示一个锁的图像.仔细看上面的源码可以发现,这里我使用了ImageView的image和背景来做的.首先ImageView的背景图片用来显示app的icon,而ImageView的image来显示是锁的图片.如果上锁则这个ImageView就设置image:

hold.app_icon.setImageResource(R.drawable.lock_app_icon);

否则:

hold.app_icon.setImageResource(0);