我想在listView中使用以下功能：
1）我想动态显示项目（由我完成）
2）然后我想在每个列表项上运行倒数计时器（1分钟）并显示 每个项目的文本倒计时不同（由我完成），并在时间到期后从listView中删除该项目
3）然后我需要在点击任何项目时显示对话框（有两个选项，接受和拒绝）
4）然后，如果用户选择接受（来自对话框），我想显示＆＃39;接受＆＃39;在TextView
中5）或者，如果用户选择拒绝，我想显示＆＃39;拒绝＆＃39;在TextView中，然后在1分钟后从列表中删除该项目（即显示被拒绝的项目，最多1分钟）
public class MainActivity extends Activity {
//listview object
private ListView lvView;
//list to store data which will pass in adapter
private List lstRoster;
//view holder user to hold view from list-items
ViewHolder holder;
// forRandom number
Random rand = new Random();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//initializing listView
lvView = (ListView) findViewById(lvItems);
//initializing list Products
lstRoster = new ArrayList<>();
//initializing custome adapter :passing-(context,list)
final CountdownAdapter cda = new CountdownAdapter(MainActivity.this, lstRoster);
//setting adapter to list view
lvView.setAdapter(cda);
//setting onlistItemClickListener on list
lvView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView arg0, View view,
final int position, long id) {
//Take action here.
// Toast.makeText(MainActivity.this, position + " Clicked", Toast.LENGTH_SHORT).show();
//lvItems.removeViewAt(position);
new AlertDialog.Builder(MainActivity.this)
.setTitle("Roster")
.setMessage("Please Accept Or cancel roster")
.setPositiveButton("Accept", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
Toast.makeText(MainActivity.this, "Roster Accepted", Toast.LENGTH_SHORT).show();
lstRoster.get(position);
cda.notifyDataSetChanged();
}
})
.setNegativeButton("Reject", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
// Toast.makeText(MainActivity.this, "No Action Roster will end automatically", Toast.LENGTH_SHORT).show();
new AlertDialog.Builder(MainActivity.this)
.setTitle("Attention")
.setMessage("Do you Really Want to Reject the roster")
.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
//
// Toast.makeText(MainActivity.this, "Roster Removed", Toast.LENGTH_SHORT).show();
lstRoster.remove(position);
cda.notifyDataSetChanged();
}
})
.setNegativeButton("NO", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
//Toast.makeText(MainActivity.this, "No Action Roster will end automatically", Toast.LENGTH_SHORT).show();
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
// lstProducts.remove(position);
// cda.notifyDataSetChanged();
}
});
//i remove button for removing list items so i commented below code
// Button btn=(Button)findViewById(R.id.button);
// btn.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
// for(int i=0;i<1;i++){
// try {
// Thread.sleep(100);
//// Object toRemove = adapter.getItem(i);
//// adapter.remove(toRemove);
// if(!lstProducts.isEmpty()) {
// lstProducts.remove(i);
// cda.notifyDataSetChanged();
// }
// else {
// Toast.makeText(MainActivity.this, "No Roster in list", Toast.LENGTH_SHORT).show();
// }
// } catch (InterruptedException e) {
// e.printStackTrace();
// }
// }
// }
// });
Button add = (Button) findViewById(R.id.add);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
for (int i = 0; i < 1; i++) {
try {
Thread.sleep(100);
// Object toRemove = adapter.getItem(i);
// adapter.remove(toRemove);
lstRoster.add(new Product("ID= " + rand.nextInt(100) + 1, System.currentTimeMillis() + 1000 * 60));
// lstProducts.add(new Product("O", System.currentTimeMillis() + 10000));
cda.notifyDataSetChanged();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
});
}
private class Product {
String name;
long expirationTime;
public Product(String name, long expirationTime) {
this.name = name;
this.expirationTime = expirationTime;
}
}
public class CountdownAdapter extends ArrayAdapter {
private LayoutInflater lf;
private List lstHolders;
private Handler mHandler = new Handler();
private Runnable updateRemainingTimeRunnable = new Runnable() {
@Override
public void run() {
synchronized (lstHolders) {
long currentTime = System.currentTimeMillis();
for (ViewHolder holder : lstHolders) {
holder.updateTimeRemaining(currentTime);
}
}
}
};
public CountdownAdapter(Context context, List objects) {
super(context, 0, objects);
lf = LayoutInflater.from(context);
lstHolders = new ArrayList<>();
startUpdateTimer();
}
private void startUpdateTimer() {
Timer tmr = new Timer();
tmr.schedule(new TimerTask() {
@Override
public void run() {
mHandler.post(updateRemainingTimeRunnable);
}
}, 1000, 1000);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = lf.inflate(R.layout.list_item, parent, false);
holder.tvProduct = (TextView) convertView.findViewById(R.id.tvProduct);
holder.tvTimeRemaining = (TextView) convertView.findViewById(R.id.tvTimeRemaining);
//buttons
// holder.btnAccept = (Button) convertView.findViewById(R.id.btn_accept);
// holder.btnReject = (Button) convertView.findViewById(R.id.btn_reject);
// holder.btnAccept.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
//
//
// }
// });
// holder.btnAccept.setOnClickListener(new View.OnClickListener() {
// @Override
// public void onClick(View v) {
//
// }
// });
convertView.setTag(holder);
synchronized (lstHolders) {
lstHolders.add(holder);
}
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.setData(getItem(position));
return convertView;
}
}
private class ViewHolder {
TextView tvProduct;
TextView tvTimeRemaining;
Button btnAccept;
Button btnReject;
Product mProduct;
public void setData(Product item) {
mProduct = item;
tvProduct.setText(item.name);
updateTimeRemaining(System.currentTimeMillis());
}
public void updateTimeRemaining(long currentTime) {
long timeDiff = mProduct.expirationTime - currentTime;
if (timeDiff > 0) {
int seconds = (int) (timeDiff / 1000) % 60;
int minutes = (int) ((timeDiff / (1000 * 60)) % 60);
int hours = (int) ((timeDiff / (1000 * 60 * 60)) % 24);
tvTimeRemaining.setText(hours + " hrs " + minutes + " mins " + seconds + " sec");
} else {
tvTimeRemaining.setText("Expired!!");
tvTimeRemaining.setTextColor(Color.RED);
}
}
}
}