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android 获取lanucher 列表
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引用：http://www.iteye.com/topic/696187
獲取Launcher 啟動列表
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即 列出所有Launcher程序 通過PackageManager 來獲取
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[代碼 步驟]
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1. 定義內部類 LauncherItem? 用于定義Application相關屬性 比如：圖標 名稱 以及 ComponentName
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Java代碼??
public?class?LauncherItem?{??????????Drawable?icon;??????????String?name;??????????ComponentName?component;????????????????????LauncherItem(Drawable?d,?String?s,ComponentName?cn){??????????????icon?=?d;??????????????name?=?s;??????????????component?=?cn;??????????}??????};?? ?
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2.? 定義List<LauncherItem> lvalue 用于存放查詢結果
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Java代碼??
public?void?addLauncher(){??????????lvalue?=?new?ArrayList<LauncherItem>();????????????????????pkgMgt?=?this.getPackageManager();??????????????????????????????Intent?it?=?new?Intent(Intent.ACTION_MAIN);??????????it.addCategory(Intent.CATEGORY_LAUNCHER);?????????????????????List<ResolveInfo>?ra?=pkgMgt.queryIntentActivities(it,0);????????????????????for(int?i=0;i<ra.size();i++){??????????????ActivityInfo?ai?=?ra.get(i).activityInfo;??????????????????????????????????????????Drawable?icon?=?ai.loadIcon(pkgMgt);??????????????String?label?=?ai.loadLabel(pkgMgt).toString();??????????????ComponentName?c?=?new?ComponentName(ai.applicationInfo.packageName,ai.name);??????????????????????????????????????????LauncherItem?item?=?new?LauncherItem(icon,label,c);????????????????????????????lvalue.add(item);??????????}????????????????}?? ?
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3. 定義LauncherAdapter 并指定各個item顯示樣式
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Java代碼??
public?class?LauncherAdapter?extends?BaseAdapter?{??????????Activity?activity;????????????????????public?LauncherAdapter(Activity?a){??????????????activity?=?a;??????????}????????????????????@Override??????????public?int?getCount()?{????????????????????????????return?lvalue.size();??????????}????????????@Override??????????public?Object?getItem(int?arg0)?{????????????????????????????return?arg0;??????????}????????????@Override??????????public?long?getItemId(int?position)?{????????????????????????????return?position;??????????}????????????@Override??????????public?View?getView(int?position,?View?convertView,?ViewGroup?parent)?{????????????????????????????return?composeItem(position);??????????}????????????????????public?View?composeItem(int?position){??????????????LinearLayout?layout?=?new?LinearLayout(activity);??????????????layout.setOrientation(LinearLayout.HORIZONTAL);????????????????????????????ImageView?iv?=?new?ImageView(activity);??????????????iv.setImageDrawable(lvalue.get(position).icon);??????????????layout.addView(iv);????????????????????????????TextView?tv?=?new?TextView(activity);??????????????tv.setText(lvalue.get(position).name);??????????????tv.setPadding(10,?5,?0,?0);??????????????layout.addView(tv);????????????????????????????return?layout;??????????}????????????????????????????????????}?? ?
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4. 啟動某個item 當單擊時
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Java代碼??
adapter?=?new?LauncherAdapter(this);??????????lv.setAdapter(adapter);????????????????????lv.setOnItemClickListener(new?OnItemClickListener(){????????????????@Override??????????????public?void?onItemClick(AdapterView<?>?arg0,?View?arg1,?int?arg2,??????????????????????long?arg3)?{????????????????????????????????????Intent?intent?=new?Intent(Intent.ACTION_VIEW);????????????????????intent.setComponent(lvalue.get(arg2).component);??????????????????startActivity(intent);??????????????}????????????????????????});?? ??
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5.? emulator 結果結果
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- 列出所有application
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- 單擊Alarm Clock 的情形：
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