鏈?瘒闅忕瑪灏嗚?瑙ｄ竴涓婣ndroid鐨勫?绾跨▼鐨勭煡璇嗭紝浠ュ強濡備綍閫氳繃AsyncTask鏈哄埗鏉ュ疄鐜扮嚎绋嬩箣闂寸殑閫氫俊銆?/p>
涓?銆丄ndroid褰撲腑鐨勫?绾跨▼
鍦ˋndroid褰撲腑锛屽綋涓?涓?簲鐢ㄧ▼搴忕殑缁勪欢鍚?姩鐨勬椂鍊欙紝骞朵笖娌℃湁鍏朵粬鐨勫簲鐢ㄧ▼搴忕粍浠跺湪杩愯?鏃讹紝Android绯荤粺灏变細涓鸿?搴旂敤绋嬪簭缁勪欢寮?杈熶竴涓?柊鐨勭嚎绋嬫潵鎵ц?銆傞粯璁ょ殑鎯呭喌涓嬶紝鍦ㄤ竴涓?浉鍚孉ndroid搴旂敤绋嬪簭褰撲腑锛屽叾閲岄潰鐨勭粍浠堕兘鏄?繍琛屽湪鍚屼竴涓?嚎绋嬮噷闈㈢殑锛岃繖涓?嚎绋嬫垜浠?О涔嬩负Main绾跨▼銆傚綋鎴戜滑閫氳繃鏌愪釜缁勪欢鏉ュ惎鍔ㄥ彟涓?涓?粍浠剁殑鏃跺?欙紝杩欎釜鏃跺?欓粯璁ら兘鏄?湪鍚屼竴涓?嚎绋嬪綋涓?畬鎴愮殑銆傚綋鐒讹紝鎴戜滑鍙?互鑷?繁鏉ョ?鐞嗘垜浠?殑Android搴旂敤鐨勭嚎绋嬶紝鎴戜滑鍙?互鏍规嵁鎴戜滑鑷?繁鐨勯渶瑕佹潵缁欏簲鐢ㄧ▼搴忓垱寤洪?澶栫殑绾跨▼銆?/p>
浜屻?丮ain Thread 鍜?Worker Thread
鍦ˋndroid褰撲腑锛岄?氬父灏嗙嚎绋嬪垎涓轰袱绉嶏紝涓?绉嶅彨鍋歁ain Thread锛岄櫎浜哅ain Thread涔嬪?鐨勭嚎绋嬮兘鍙?О涓篧orker Thread銆?/p>
褰撲竴涓?簲鐢ㄧ▼搴忚繍琛岀殑鏃跺?欙紝Android鎿嶄綔绯荤粺灏变細缁欒?搴旂敤绋嬪簭鍚?姩涓?涓?嚎绋嬶紝杩欎釜绾跨▼灏辨槸鎴戜滑鐨凪ain Thread锛岃繖涓?嚎绋嬮潪甯哥殑閲嶈?锛屽畠涓昏?鐢ㄦ潵鍔犺浇鎴戜滑鐨刄I鐣岄潰锛屽畬鎴愮郴缁熷拰鎴戜滑鐢ㄦ埛涔嬮棿鐨勪氦浜掞紝骞跺皢浜や簰鍚庣殑缁撴灉鍙堝睍绀虹粰鎴戜滑鐢ㄦ埛锛屾墍浠?ain Thread鍙堣?绉颁负UI Thread銆?/p>
Android绯荤粺榛樿?涓嶄細缁欐垜浠?殑搴旂敤绋嬪簭缁勪欢鍒涘缓涓?涓??澶栫殑绾跨▼锛屾墍鏈夌殑杩欎簺缁勪欢榛樿?閮芥槸鍦ㄥ悓涓?涓?嚎绋嬩腑杩愯?銆傜劧鑰岋紝鏌愪簺鏃跺?欏綋鎴戜滑鐨勫簲鐢ㄧ▼搴忛渶瑕佸畬鎴愪竴涓??楁椂鐨勬搷浣滅殑鏃跺?欙紝渚嬪?璁块棶缃戠粶鎴栬?呮槸瀵规暟鎹?簱杩涜?鏌ヨ?鏃讹紝姝ゆ椂鎴戜滑鐨刄I Thread灏变細琚?樆濉炪?備緥濡傦紝褰撴垜浠?偣鍑讳竴涓狟utton锛岀劧鍚庡笇鏈涘叾浠庣綉缁滀腑鑾峰彇涓?浜涙暟鎹?紝濡傛灉姝ゆ搷浣滃湪UI Thread褰撲腑瀹屾垚鐨勮瘽锛屽綋鎴戜滑鐐瑰嚮Button鐨勬椂鍊欙紝UI绾跨▼灏变細澶勪簬闃诲?鐨勭姸鎬侊紝姝ゆ椂锛屾垜浠?殑绯荤粺涓嶄細璋冨害浠讳綍鍏跺畠鐨勪簨浠讹紝鏇寸碂绯曠殑鏄?紝褰撴垜浠?殑鏁翠釜鐜板満濡傛灉闃诲?鏃堕棿瓒呰繃5绉掗挓(瀹樻柟鏄?繖鏍疯?鐨?锛岃繖涓?椂鍊欏氨浼氬嚭鐜?ANR (Application Not Responding)鐨勭幇璞★紝姝ゆ椂锛屽簲鐢ㄧ▼搴忎細寮瑰嚭涓?涓??锛岃?鐢ㄦ埛閫夋嫨鏄?惁閫?鍑鸿?绋嬪簭銆傚?浜嶢ndroid寮?鍙戞潵璇达紝鍑虹幇ANR鐨勭幇璞℃槸缁濆?涓嶈兘琚?厑璁哥殑銆?/p>
鍙﹀?锛岀敱浜庢垜浠?殑Android UI鎺т欢鏄?嚎绋嬩笉瀹夊叏鐨勶紝鎵?浠ユ垜浠?笉鑳藉湪UI Thread涔嬪?鐨勭嚎绋嬪綋涓??鎴戜滑鐨刄I鎺т欢杩涜?鎿嶄綔銆傚洜姝ゅ湪Android鐨勫?绾跨▼缂栫▼褰撲腑锛屾垜浠?湁涓ゆ潯闈炲父閲嶈?鐨勫師鍒欏繀椤昏?閬靛畧锛?/p>
- 缁濆?涓嶈兘鍦║I Thread褰撲腑杩涜?鑰楁椂鐨勬搷浣滐紝涓嶈兘闃诲?鎴戜滑鐨刄I Thread
- 涓嶈兘鍦║I Thread涔嬪?鐨勭嚎绋嬪綋涓?搷绾垫垜浠?殑UI鍏冪礌
涓夈?佸?浣曞?鐞哢I Thread 鍜?Worker Thread涔嬮棿鐨勯?氫俊
鏃㈢劧鍦ˋndroid褰撲腑鏈変袱鏉￠噸瑕佺殑鍘熷垯瑕侀伒瀹堬紝閭ｄ箞鎴戜滑鍙?兘灏辨湁鐤戦棶浜嗭紵鎴戜滑鏃?笉鑳藉湪涓荤嚎绋嬪綋涓??鐞嗚?楁椂鐨勬搷浣滐紝鍙堜笉鑳藉湪宸ヤ綔绾跨▼涓?潵璁块棶鎴戜滑鐨刄I鎺т欢锛岄偅涔堟垜浠?瘮濡備粠缃戠粶涓??涓嬭浇涓?寮犲浘鐗囷紝鍙堟?庝箞鑳藉皢鍏舵洿鏂板埌UI鎺т欢涓婂憿锛熻繖灏卞叧绯诲埌浜嗘垜浠?殑涓荤嚎绋嬪拰宸ヤ綔绾跨▼涔嬮棿鐨勯?氫俊闂??浜嗐?傚湪Android褰撲腑锛屾彁渚涗簡涓ょ?鏂瑰紡鏉ヨВ鍐崇嚎绋嬬洿鎺ョ殑閫氫俊闂??锛屼竴绉嶆槸閫氳繃Handler鐨勬満鍒?杩欑?鏂瑰紡鍦ㄥ悗闈㈢殑闅忕瑪涓?皢璇︾粏浠嬬粛),杩樻湁涓?绉嶅氨鏄?粖澶╄?璇︾粏璁茶В鐨?AsyncTask 鏈哄埗銆?/p>
鍥涖?丄syncTask
AsyncTask锛氬紓姝ヤ换鍔★紝浠庡瓧闈?笂鏉ヨ?锛屽氨鏄?湪鎴戜滑鐨刄I涓荤嚎绋嬭繍琛岀殑鏃跺?欙紝寮傛?鐨勫畬鎴愪竴浜涙搷浣溿?侫syncTask鍏佽?鎴戜滑鐨勬墽琛屼竴涓?紓姝ョ殑浠诲姟鍦ㄥ悗鍙般?傛垜浠?彲浠ュ皢鑰楁椂鐨勬搷浣滄斁鍦ㄥ紓姝ヤ换鍔″綋涓?潵鎵ц?锛屽苟闅忔椂灏嗕换鍔℃墽琛岀殑缁撴灉杩斿洖缁欐垜浠?殑UI绾跨▼鏉ユ洿鏂版垜浠?殑UI鎺т欢銆傞?氳繃AsyncTask鎴戜滑鍙?互杞绘澗鐨勮В鍐冲?绾跨▼涔嬮棿鐨勯?氫俊闂??銆?/p>
鎬庝箞鏉ョ悊瑙?syncTask鍛?紵閫氫織涓?鐐规潵璇达紝AsyncTask灏辩浉褰撲簬Android缁欐垜浠?彁渚涗簡涓?涓??绾跨▼缂栫▼鐨勪竴涓??鏋讹紝鍏朵粙浜嶵hread鍜孒andler涔嬮棿锛屾垜浠??鏋滆?瀹氫箟涓?涓狝syncTask锛屽氨闇?瑕佸畾涔変竴涓?被鏉ョ户鎵緼syncTask杩欎釜鎶借薄绫伙紝骞跺疄鐜板叾鍞?竴鐨勪竴涓?doInBackgroud 鎶借薄鏂规硶銆傝?鎺屾彙AsyncTask锛屾垜浠?氨蹇呴』瑕佷竴涓??蹇碉紝鎬荤粨璧锋潵灏辨槸: 3涓?硾鍨嬶紝4涓??楠ゃ??/p>
3涓?硾鍨嬫寚鐨勬槸浠?涔堝憿锛熸垜浠?潵鐪嬬湅AsyncTask杩欎釜鎶借薄绫荤殑瀹氫箟锛屽綋鎴戜滑瀹氫箟涓?涓?被鏉ョ户鎵緼syncTask杩欎釜绫荤殑鏃跺?欙紝鎴戜滑闇?瑕佷负鍏舵寚瀹?涓?硾鍨嬪弬鏁帮細
AsyncTask銆?<Params, Progress, Result>
- Params: 杩欎釜娉涘瀷鎸囧畾鐨勬槸鎴戜滑浼犻?掔粰寮傛?浠诲姟鎵ц?鏃剁殑鍙傛暟鐨勭被鍨?/li>
- Progress: 杩欎釜娉涘瀷鎸囧畾鐨勬槸鎴戜滑鐨勫紓姝ヤ换鍔″湪鎵ц?鐨勬椂鍊欏皢鎵ц?鐨勮繘搴﹁繑鍥炵粰UI绾跨▼鐨勫弬鏁扮殑绫诲瀷
- Result: 杩欎釜娉涘瀷鎸囧畾鐨勫紓姝ヤ换鍔℃墽琛屽畬鍚庤繑鍥炵粰UI绾跨▼鐨勭粨鏋滅殑绫诲瀷
鎴戜滑鍦ㄥ畾涔変竴涓?被缁ф壙AsyncTask绫荤殑鏃跺?欙紝蹇呴』瑕佹寚瀹氬ソ杩欎笁涓?硾鍨嬬殑绫诲瀷锛屽?鏋滈兘涓嶆寚瀹氱殑璇濓紝鍒欓兘灏嗗叾鍐欐垚Void锛屼緥濡傦細
AsyncTask <Void, Void, Void>
4涓??楠わ細褰撴垜浠?墽琛屼竴涓?紓姝ヤ换鍔＄殑鏃跺?欙紝鍏堕渶瑕佹寜鐓т笅闈㈢殑4涓??楠ゅ垎鍒?墽琛?/p>
- onPreExecute(): 杩欎釜鏂规硶鏄?湪鎵ц?寮傛?浠诲姟涔嬪墠鐨勬椂鍊欐墽琛岋紝骞朵笖鏄?湪UI Thread褰撲腑鎵ц?鐨勶紝閫氬父鎴戜滑鍦ㄨ繖涓?柟娉曢噷鍋氫竴浜沀I鎺т欢鐨勫垵濮嬪寲鐨勬搷浣滐紝渚嬪?寮瑰嚭瑕佺粰ProgressDialog
- doInBackground(Params... params): 鍦╫nPreExecute()鏂规硶鎵ц?瀹屼箣鍚庯紝浼氶┈涓婃墽琛岃繖涓?柟娉曪紝杩欎釜鏂规硶灏辨槸鏉ュ?鐞嗗紓姝ヤ换鍔＄殑鏂规硶锛孉ndroid鎿嶄綔绯荤粺浼氬湪鍚庡彴鐨勭嚎绋嬫睜褰撲腑寮?鍚?竴涓獁orker thread鏉ユ墽琛屾垜浠?殑杩欎釜鏂规硶锛屾墍浠ヨ繖涓?柟娉曟槸鍦╳orker thread褰撲腑鎵ц?鐨勶紝杩欎釜鏂规硶鎵ц?瀹屼箣鍚庡氨鍙?互灏嗘垜浠?殑鎵ц?缁撴灉鍙戦?佺粰鎴戜滑鐨勬渶鍚庝竴涓?onPostExecute 鏂规硶锛屽湪杩欎釜鏂规硶閲岋紝鎴戜滑鍙?互浠庣綉缁滃綋涓?幏鍙栨暟鎹?瓑涓?浜涜?楁椂鐨勬搷浣?/li>
- onProgressUpdate(Progess... values): 杩欎釜鏂规硶涔熸槸鍦║I Thread褰撲腑鎵ц?鐨勶紝鎴戜滑鍦ㄥ紓姝ヤ换鍔℃墽琛岀殑鏃跺?欙紝鏈夋椂鍊欓渶瑕佸皢鎵ц?鐨勮繘搴﹁繑鍥炵粰鎴戜滑鐨刄I鐣岄潰锛屼緥濡備笅杞戒竴寮犵綉缁滃浘鐗囷紝鎴戜滑闇?瑕佹椂鍒绘樉绀哄叾涓嬭浇鐨勮繘搴︼紝灏卞彲浠ヤ娇鐢ㄨ繖涓?柟娉曟潵鏇存柊鎴戜滑鐨勮繘搴︺?傝繖涓?柟娉曞湪璋冪敤涔嬪墠锛屾垜浠?渶瑕佸湪 doInBackground 鏂规硶涓?皟鐢ㄤ竴涓?publishProgress(Progress) 鐨勬柟娉曟潵灏嗘垜浠?殑杩涘害鏃舵椂鍒诲埢浼犻?掔粰 onProgressUpdate 鏂规硶鏉ユ洿鏂?/li>
- onPostExecute(Result... result): 褰撴垜浠?殑寮傛?浠诲姟鎵ц?瀹屼箣鍚庯紝灏变細灏嗙粨鏋滆繑鍥炵粰杩欎釜鏂规硶锛岃繖涓?柟娉曚篃鏄?湪UI Thread褰撲腑璋冪敤鐨勶紝鎴戜滑鍙?互灏嗚繑鍥炵殑缁撴灉鏄剧ず鍦║I鎺т欢涓?/li>
涓轰粈涔堟垜浠?殑AsyncTask鎶借薄绫诲彧鏈変竴涓?doInBackground 鐨勬娊璞℃柟娉曞憿锛燂紵鍘熷洜鏄?紝鎴戜滑濡傛灉瑕佸仛涓?涓?紓姝ヤ换鍔★紝鎴戜滑蹇呴』瑕佷负鍏跺紑杈熶竴涓?柊鐨凾hread锛岃?鍏跺畬鎴愪竴浜涙搷浣滐紝鑰屽湪瀹屾垚杩欎釜寮傛?浠诲姟鏃讹紝鎴戝彲鑳藉苟涓嶉渶瑕佸脊鍑鸿?缁橮rogressDialog锛屾垜骞朵笉闇?瑕侀殢鏃舵洿鏂版垜鐨凱rogressDialog鐨勮繘搴︽潯锛屾垜涔熷苟涓嶉渶瑕佸皢缁撴灉鏇存柊缁欐垜浠?殑UI鐣岄潰锛屾墍浠ラ櫎浜?doInBackground 鏂规硶涔嬪?鐨勪笁涓?柟娉曪紝閮戒笉鏄?繀椤绘湁鐨勶紝鍥犳?鎴戜滑蹇呴』瑕佸疄鐜扮殑鏂规硶鏄?doInBackground 鏂规硶銆?/p>
鎽樿嚜锛?/p>
http://jackyrong.iteye.com/blog/1336299
http://www.cnblogs.com/xiaoluo501395377/p/3430542.html