3
减少TextView的数量，我创建了两个按钮，TextView的，在这里如果我点击加号按钮TextView的应该增加，如果我减少，反之亦然。现在我做了一个活动，在点击列表视图项目一个对话框将出现，它有一些复选框，按钮，微调等在那里。我尝试将代码添加到警报框和我的按钮。但它不做工精细，如果我点击加号按钮它给人的最后极限是45变成46，如果我点击下降按钮，它只是降低了一次..如何增加或通过按钮的Android
这里是我的子菜单活动：
public class SubMenu extends AppCompatActivity {
JSONObject jsonobject;
JSONArray jsonarray;
ListView listview;
ListViewAdapter adapter;
ProgressDialog mProgressDialog;
ArrayList<HashMap<String, String>> arraylist;
static String RANK = "id";
static String COUNTRY = "name";
static String FLAG = "image";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sub_menu);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
String SelectedId = getIntent().getStringExtra("id");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// Get the view from listview_main.xml
// Execute DownloadJSON AsyncTask
new DownloadJSON().execute();
}
// DownloadJSON AsyncTask
private class DownloadJSON extends AsyncTask<Void, Void, Void> implements AdapterView.OnItemClickListener {
// @Override
// protected void onPreExecute() {
// super.onPreExecute();
// Create a progressdialog
// mProgressDialog = new ProgressDialog(SubMenu.this);
// Set progressdialog title
// mProgressDialog.setTitle("Categories of Main categories.....");
// Set progressdialog message
// mProgressDialog.setMessage("Loading...");
// mProgressDialog.setIndeterminate(false);
// Show progressdialog
// mProgressDialog.show();
// }
@Override
protected Void doInBackground(Void... params) {
// Create an array
arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
jsonarray = JsonFunctions
.getJSONfromURL("http://cloud.......com/broccoli/menu_typeitem.php?id=" + getIntent().getStringExtra("id"));
try {
// Locate the array name in JSON
// jsonarray = jsonobject.getJSONArray("main_menu_items");
for (int i = 0; i < jsonarray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
jsonobject = jsonarray.getJSONObject(i);
// Retrive JSON Objects
// map.put("id", jsonobject.getString("id"));
map.put("name", jsonobject.getString("name"));
map.put("image", jsonobject.getString("image"));
// Set the JSON Objects into the array
arraylist.add(map);
}
} catch (JSONException e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) findViewById(R.id.list1);
// Pass the results into ListViewAdapter.java
adapter = new ListViewAdapter(SubMenu.this, arraylist);
// Set the adapter to the ListView
listview.setAdapter(adapter);
listview.setOnItemClickListener(this);
// Close the progressdialog
// mProgressDialog.dismiss();
}
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long rowId) {
final AlertDialog customDialog = new AlertDialog.Builder(SubMenu.this).create();
final LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.popup
, null);
customDialog.setView(dialogView);
// set the custom customDialogimation components - text, image and button
final TextView tvDistance = (TextView) dialogView.findViewById(R.id.h2);
final Button ok=(Button)dialogView.findViewById(R.id.ok) ;
ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
final Button cncl=(Button)dialogView.findViewById(R.id.canc) ;
cncl.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
customDialog.dismiss();
}
});
Button _decrease = (Button) dialogView.findViewById(R.id.incr);
Button _increase = (Button) dialogView.findViewById(R.id.decr);
final TextView _value = (TextView) dialogView.findViewById(R.id.value);
_decrease.setOnClickListener(new View.OnClickListener() {
int currentID = (int) System.currentTimeMillis();
int lastID;
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
removeLastTextView();
lastID--;
}
});
_increase.setOnClickListener(new View.OnClickListener() {
int currentID = (int) System.currentTimeMillis();
int lastID;
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
addNewTextView();
lastID = currentID;
currentID++;
}
});
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
这里就是我想要做微调这样的形象： 我想希望有微调的图像 
是否有应显示在提到TextView的首次任何默认值？ –
您已初始化onClick（）的值。 int _counter = 45;所以你面临这个错误 – Noorul
不，我没有提到任何默认值valur thr –