Dialog展示手机android安装的app信息

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[n].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);