Android listview动态添加删除测试

001

import

java.util.ArrayList;

002

import

java.util.LinkedHashMap;

003

import

java.util.List;

004

import

java.util.Random;

005

006

import

android.app.Activity;

007

import

android.os.Bundle;

008

import

android.os.Handler;

009

import

android.os.Message;

010

import

android.util.Log;

011

import

android.view.LayoutInflater;

012

import

android.view.View;

013

import

android.view.View.OnClickListener;

014

import

android.view.ViewGroup;

015

import

android.widget.AbsListView;

016

import

android.widget.AbsListView.OnScrollListener;

017

import

android.widget.BaseAdapter;

018

import

android.widget.Button;

019

import

android.widget.ListView;

020

import

android.widget.ProgressBar;

021

import

android.widget.TextView;

022

023

public

class

ListviewTest 

extends

Activity

implements

OnClickListener{

024

025

int

jobcounter =

0

;

026

027

private

static

final

int

ADDJOB =

1001

;

028

private

static

final

int

PROCESSADD =

1002

;

029

private

static

final

int

PROCESSDONE =

1003

;

030

private

static

final

int

ITEMBUTTON_CLICKED =

1004

;

031

032

private

static

final

String TAG =

"ListviewTest"

;

033

034

protected

static

final

long

REFRESH_INTERVAL =

100

; 

035

036

protected

boolean

mBusy =

false

;

037

long

lastupdatetime =

0

;

038

039

040

Object lock =

new

Object() ;

041

042

ListView listview ;

043

Button buttonadd ;

044

045

AddjavaListAdapteradapter ;

046

LayoutInflater inflater ;

047

048

LinkedHashMap<Integer, ListInfo>listdatas ;

049

050

LinkedHashMap<Integer, ListInfo>addlist =

new

LinkedHashMap<Integer, ListviewTest.ListInfo>() ;

051

1d25c
    

List<Integer>delidlist =

new

ArrayList<Integer>() ;

052

053

054

Handler mainhandler =

new

Handler(){

055

056

public

void

handleMessage(android.os.Message msg) {

057

long

v = System.currentTimeMillis() - lastupdatetime ;

058

059

060

switch

(msg.what) {

061

case

ADDJOB:

062

063

//if (inView(msg.arg1) && !mBusy) {

064

//                  Log.i(TAG, " ADDJOB done!") ;

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updateListView();

066

lastupdatetime += REFRESH_INTERVAL ;

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//}

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break

;

069

case

PROCESSADD:

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if

( !mBusy && v>REFRESH_INTERVAL) {

071

updateListView();

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lastupdatetime =System.currentTimeMillis() ;

073

}

074

break

;

075

076

case

ITEMBUTTON_CLICKED:{

077

if

(!listdatas.get(msg.arg1).running ) {

078

synchronized

(listdatas.get(msg.arg1).lock) {

079

listdatas.get(msg.arg1).lock.notifyAll() ;

080

}

081

} 

082

listdatas.get(msg.arg1).running =!listdatas.get(msg.arg1).running ;

083

if

( !mBusy ) {

084

updateListView();

085

lastupdatetime += REFRESH_INTERVAL ;

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}

087

break

;

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}

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case

PROCESSDONE:

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//              Log.i(TAG, " PROCESSDONE done!"+msg.arg1) ;

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synchronized

(lock) {

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delidlist.add(msg.arg1) ;

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}

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updateListView();

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lastupdatetime += REFRESH_INTERVAL ;

096

break

;

097

098

default

:

099

break

;

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}

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102

};

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};

105

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void

updateListView(){

107

synchronized

(lock) {

108

for

(Integer delid : delidlist) {

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Log.i(TAG,

" PROCESSDONE done!"

+delid) ;

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listdatas.remove(delid) ;

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}

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listdatas.putAll(addlist) ;

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for

(ListInfo info : addlist.values()) {

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//启动工作线程

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new

WorkThread(

"workthread#"

+jobcounter,info).start() ;

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jobcounter++ ;

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}

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//清空 delidlist 和 addlist

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delidlist.clear() ;

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addlist.clear() ;

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}

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adapter.notifyDataSetChanged();

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}

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@Override

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protected

void

onCreate(Bundle savedInstanceState) {

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listdatas  =

new

LinkedHashMap<Integer, ListInfo>() ;

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super

.onCreate(savedInstanceState);

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setContentView(R.layout.listviewtest);

133

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listview = (ListView) findViewById(R.id.listView001) ;

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adapter =

new

AddjavaListAdapter();

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listview.setAdapter(adapter) ;

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//设置 当listview 进行上下拖动操作时的状态

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listview.setOnScrollListener(

new

OnScrollListener() {

139

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@Override

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public

void

onScrollStateChanged(AbsListView view,

int

scrollState) {

142

switch

(scrollState) {

143

case

OnScrollListener.SCROLL_STATE_IDLE:

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mBusy =

false

;

145

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break

;

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case

OnScrollListener.SCROLL_STATE_TOUCH_SCROLL:

148

mBusy =

true

;

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break

;

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case

OnScrollListener.SCROLL_STATE_FLING:

151

mBusy =

true

;

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break

;

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}

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}

155

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@Override

157

public

void

onScroll(AbsListView view,

int

firstVisibleItem,

158

int

visibleItemCount,

int

totalItemCount) {

159

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}

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}) ;

162

163

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buttonadd  = (Button) findViewById(R.id.button_listaddjob);

165

buttonadd.setOnClickListener(

this

);

166

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inflater = LayoutInflater.from(

this

);  

168

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}

170

// 存放单条 listview 的数据

171

class

ListInfo{

172

@Override

173

public

String toString() {

174

return

"ListInfo [index="

+ index +

", id="

+ id +

", running="

175

+ running +

", title="

+ title +

", process="

+ process

176

+

"]"

;

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}

178

int

index ;

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long

id ;

180

boolean

running =

true

;

181

182

String title  ;

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int

process ;

184

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Object lock =

new

Object();

186

}

187

188

class

ViewHodler{

189

190

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TextView text ;

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ProgressBar bar ;

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Button button ;

194

ItemClickListenerlistener;

195

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}

197

198

// listview的适配器

199

class

AddjavaListAdapter

extends

BaseAdapter {

200

201

202

203

@Override

204

public

int

getCount() {

205

return

listdatas.keySet().size();

206

}

207

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@Override

209

public

Object getItem(

int

position) {

210

//从 listdata里获取 对应的数据 ,因为有删除的缘故.在有任务完成后 position不等于listdata的key

211

Object[] d = listdatas.keySet().toArray() ;

212

int

c = (Integer)d[position] ;

213

//          Log.i(TAG, "~~~~~getItem~~position["+position+"] [c="+c+"]") ;

214

return

listdatas.get(c) ;

215

}

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@Override

218

public

long

getItemId(

int

position) {

219

return

((ListInfo)

this

.getItem(position)).id ;

220

}

221

222

@Override

223

public

View getView(

int

position, View v, ViewGroup parent) {

224

ViewHodler holder ;

225

//  获取单条item 的view对象

226

if

(v==

null

) {

227

v = inflater.inflate(R.layout.listview_item,

null

) ;

228

holder =

new

ViewHodler() ;

229

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holder.text = (TextView) v.findViewById(R.id.textView_item) ;

231

holder.bar = (ProgressBar) v.findViewById(R.id.progressBar_item);

232

holder.button = (Button) v.findViewById(R.id.button_item) ;

233

holder.listener =

new

ItemClickListener() ;

234

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v.setTag(holder) ;

236

237

}

else

{

238

holder = (ViewHodler) v.getTag();

239

}

240

//将数据显示到每个对应的 view上.

241

final

ListInfo data = (ListInfo)getItem(position) ;

242

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holder.listener.setId(data.index) ;

244

holder.button.setOnClickListener(holder.listener) ;

245

246

holder.text.setText(data.title) ;

247

holder.bar.setProgress(data.process) ;

248

if

(data.running) {

249

holder.button.setText(R.string.item_stop) ;

250

}

else

{

251

holder.button.setText(R.string.item_start) ;

252

}

253

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return

v;

255

}

256

257

}

258

259

260

class

ItemClickListener

implements

OnClickListener{

261

private

int

id ;

262

263

public

void

setId(

int

id) {

264

this

.id = id;

265

}

266

267

@Override

268

public

void

onClick(View v) {

269

Log.i(TAG,

"button clicked! "

+id +

"|"

+listdatas.get(id).running+

"-->"

+!listdatas.get(id).running);

270

sendMessageToHandler(ITEMBUTTON_CLICKED,id) ;

271

}

272

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}

274

275

class

WorkThread

extends

Thread{

276

277

ListInfo in ;

278

public

WorkThread(String name ,ListInfo in){

279

super

(name) ;

280

this

.in = in ;

281

}

282

283

@Override

284

public

void

run() {

285

ListInfo sdata = listdatas.get(in.index) ;

286

287

while

(sdata.process<

100

) {

288

289

//如果暂停 则等待

290

if

(!listdatas.get(in.index).running ) {

291

synchronized

(listdatas.get(in.index).lock) {

292

try

{

293

listdatas.get(in.index).lock.wait() ;

294

}

catch

(InterruptedException e) {

295

e.printStackTrace();

296

}

297

}

298

} 

299

//模拟耗时任务操作

300

try

{

301

Thread.sleep((

int

)(

3000

*

new

Random().nextDouble()));

302

}

catch

(InterruptedException e) {

303

e.printStackTrace();

304

}

305

sdata.process +=

new

Random().nextInt(

15

)+

1

;

306

sendMessageToHandler(PROCESSADD,in.index) ;

307

}

308

//发送任务结束消息

309

if

(sdata.process>=

100

) {

310

sendMessageToHandler(PROCESSDONE,in.index) ;

311

//              Log.i(TAG, this.getName()+"#done") ;

312

313

}

314

}

315

316

}

317

318

319

@Override

320

public

void

onClick(View v) {

321

switch

(v.getId()) {

322

case

R.id.button_listaddjob:{

323

324

ListInfo info =

new

ListInfo() ;

325

info.title =

"file"

+ jobcounter ;

326

info.process =

0

;

327

info.id = jobcounter ;

328

info.index = jobcounter ;

329

synchronized

(lock) {

330

addlist.put(jobcounter, info) ;

331

}

332

sendMessageToHandler(ADDJOB,jobcounter) ;

333

334

break

;

335

}

336

337

default

:

338

break

;

339

}

340

}

341

342

343

void

sendMessageToHandler(

int

what,

int

arg1){

344

Message message = mainhandler.obtainMessage() ;

345

message.what = what ;

346

message.arg1 = arg1 ;

347

message.sendToTarget() ;

348

}

349

350

}

01

<?

xml

version

=

"1.0"

encoding

=

"utf-8"

?>

02

<

LinearLayout

xmlns:android

=

"http://schemas.android.com/apk/res/android"

03

android:id

=

"@+id/listview_item"

04

android:layout_width

=

"match_parent"

05

android:layout_height

=

"wrap_content"

06

android:orientation

=

"horizontal"

>

07

08

<

TextView

09

android:id

=

"@+id/textView_item"

10

android:layout_width

=

"wrap_content"

11

android:layout_height

=

"wrap_content"

12

android:layout_gravity

=

"center_vertical"

13

android:text

=

"TextView"

/>

14

15

<

ProgressBar

16

android:id

=

"@+id/progressBar_item"

17

style

=

"?android:attr/progressBarStyleHorizontal"

18

android:layout_width

=

"wrap_content"

19

android:layout_height

=

"wrap_content"

20

android:layout_gravity

=

"center_vertical"

21

android:layout_weight

=

"0.75"

/>

22

23

<

Button

24

android:id

=

"@+id/button_item"

25

android:layout_width

=

"wrap_content"

26

android:layout_height

=

"wrap_content"

27

android:layout_gravity

=

"center_vertical"

28

android:focusable

=

"false"

29

android:text

=

"@string/start"

/>

30

31

32

33

</

LinearLayout

>

01

<?

xml

version

=

"1.0"

encoding

=

"utf-8"

?>

02

<

LinearLayout

xmlns:android

=

"http://schemas.android.com/apk/res/android"

03

04

android:layout_width

=

"match_parent"

05

android:layout_height

=

"match_parent"

06

android:orientation

=

"vertical"

>

07

08

09

<

Button

10

android:id

=

"@+id/button_listaddjob"

11

android:layout_width

=

"wrap_content"

12

android:layout_height

=

"wrap_content"

13

android:text

=

"@string/add"

/>

14

15

<

ListView

16

android:id

=

"@+id/listView001"

17

android:layout_width

=

"match_parent"

18

android:layout_height

=

"wrap_content"

>

19

</

ListView

>

20

21

</

LinearLayout

>