Java 单击ListView中的select项时,不会发生任何事情,但LogCat中不会出现错误
在我的Java 单击ListView中的select项时,不会发生任何事情,但LogCat中不会出现错误,java,android,listview,mobile-application,Java,Android,Listview,Mobile Application,在我的列表视图中选择项目时出现问题。当我单击时,什么也没有发生,我无法转到下一个活动,因为当前的列表视图不可单击。 我试着逐行调试代码,但它似乎没有进入mclick的public部分。为什么会变成这样 这是我的密码 import android.app.ProgressDialog; import android.content.Intent; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity
列表视图中选择项目时出现问题。当我单击时,什么也没有发生,我无法转到下一个活动,因为当前的列表视图不可单击。
我试着逐行调试代码,但它似乎没有进入mclick的public部分。为什么会变成这样
这是我的密码
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Button;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class ViewAllBills extends AppCompatActivity implements ListView.OnItemClickListener {
private ListView listView;
private Button mydebtsBtn;
private String JSON_STRING;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_all_bills);
listView = (ListView) findViewById(R.id.listView);
listView.setOnItemClickListener(this);
getJSON();
myDebt();
}
//for new bill
public void myDebt() {
mydebtsBtn = (Button) findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent page1 = new Intent(ViewAllBills.this,myDebt.class);
startActivity(page1);
}
});}
private void showBills(){
JSONObject jsonObject = null;
ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String, String>>();
try {
jsonObject = new JSONObject(JSON_STRING);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
for(int i = 0; i<result.length(); i++){
JSONObject jo = result.getJSONObject(i);
String id = jo.getString(Config.TAG_ID);
String desc = jo.getString(Config.TAG_DESCRIPTION);
String amo = jo.getString(Config.TAG_AMOUNT);
HashMap<String,String> bills = new HashMap<>();
bills.put(Config.TAG_ID,id);
bills.put(Config.TAG_DESCRIPTION,desc);
bills.put(Config.TAG_AMOUNT,amo);
list.add(bills);
}
} catch (JSONException e) {
e.printStackTrace();
}
ListAdapter adapter = new SimpleAdapter(
ViewAllBills.this, list, R.layout.list_item,
new String[]{Config.TAG_ID,Config.TAG_DESCRIPTION,Config.TAG_AMOUNT},
new int[]{R.id.id, R.id.description,R.id.amountBill});
listView.setAdapter(adapter);
}
private void getJSON(){
class GetJSON extends AsyncTask<Void,Void,String>{
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewAllBills.this,"Fetching Data","Wait...",false,false);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
JSON_STRING = s;
showBills();
}
@Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequest(Config.URL_GET_ALL);
return s;
}
}
GetJSON gj = new GetJSON();
gj.execute();
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(ViewAllBills.this, ViewBills.class);
HashMap<String,String> map =(HashMap)parent.getItemAtPosition(position);
String billId = map.get(Config.TAG_ID).toString();
intent.putExtra(Config.BILL_ID,billId);
startActivity(intent);
}
}
导入android.app.ProgressDialog;
导入android.content.Intent;
导入android.os.AsyncTask;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ListAdapter;
导入android.widget.ListView;
导入android.widget.simpledapter;
导入android.widget.TextView;
导入android.widget.Toast;
导入android.widget.Button;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.HashMap;
公共类ViewAllBills扩展AppCompativeActivity实现ListView.OnItemClickListener{
私有列表视图列表视图;
专用按钮mydebtsBtn;
私有字符串JSON_字符串;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u view\u all\u bills);
listView=(listView)findViewById(R.id.listView);
setOnItemClickListener(this);
getJSON();
我的债务();
}
//新法案
公共债务{
mydebtsBtn=(按钮)findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图arg0){
Intent page1=新的Intent(ViewAllBills.this,myDebt.class);
星触觉(第1页);
}
});}
私人票据(){
JSONObject JSONObject=null;
ArrayList=新建ArrayList();
试一试{
jsonObject=新的jsonObject(JSON_字符串);
JSONArray result=jsonObject.getJSONArray(Config.TAG\u JSON\u数组);
对于(int i=0;i
这是我的List_item.xml布局
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true"
android:background="@color/skyBlue"
>
<GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnCount="3"
android:rowCount="3"
android:background="@drawable/border_style"
android:layout_marginTop="5dp">
<TextView
android:id="@+id/id"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:textStyle="bold" />
<TextView
android:id="@+id/description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
/>
<TextView
android:id="@+id/amountBill"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:layout_gravity="right"
/>
</GridLayout>
</ScrollView>
试试这个:
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Button;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class ViewAllBills extends AppCompatActivity implements ListView.OnItemClickListener {
private Button mydebtsBtn;
private String JSON_STRING;
private ListView listView;
ArrayList<HashMap<String,String>> list;
ListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_all_bills);
listView = (ListView) findViewById(R.id.listView);
list = new ArrayList<HashMap<String, String>>();
getJSON();
myDebt();
}
//for new bill
public void myDebt() {
mydebtsBtn = (Button) findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent page1 = new Intent(ViewAllBills.this,myDebt.class);
startActivity(page1);
}
});}
private void showBills(){
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(JSON_STRING);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
for(int i = 0; i<result.length(); i++){
JSONObject jo = result.getJSONObject(i);
String id = jo.getString(Config.TAG_ID);
String desc = jo.getString(Config.TAG_DESCRIPTION);
String amo = jo.getString(Config.TAG_AMOUNT);
HashMap<String,String> bills = new HashMap<>();
bills.put(Config.TAG_ID,id);
bills.put(Config.TAG_DESCRIPTION,desc);
bills.put(Config.TAG_AMOUNT,amo);
list.add(bills);
}
} catch (JSONException e) {
e.printStackTrace();
}
adapter = new SimpleAdapter(
ViewAllBills.this, list, R.layout.list_item,
new String[]{Config.TAG_ID,Config.TAG_DESCRIPTION,Config.TAG_AMOUNT},
new int[]{R.id.id, R.id.description,R.id.amountBill});
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
private void getJSON(){
class GetJSON extends AsyncTask<Void,Void,String>{
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewAllBills.this,"Fetching Data","Wait...",false,false);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
JSON_STRING = s;
showBills();
}
@Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequest(Config.URL_GET_ALL);
return s;
}
}
GetJSON gj = new GetJSON();
gj.execute();
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(ViewAllBills.this, ViewBills.class);
HashMap<String,String> map = list.get(position);
String billId = map.get(Config.TAG_ID).toString();
intent.putExtra(Config.BILL_ID,billId);
startActivity(intent);
}
}
导入android.app.ProgressDialog;
导入android.content.Intent;
导入android.os.AsyncTask;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ListAdapter;
导入android.widget.ListView;
导入android.widget.simpledapter;
导入android.widget.TextView;
导入android.widget.Toast;
导入android.widget.Button;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.HashMap;
公共类ViewAllBills扩展AppCompativeActivity实现ListView.OnItemClickListener{
专用按钮mydebtsBtn;
私有字符串JSON_字符串;
私有列表视图列表视图;
数组列表;
列表适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u view\u all\u bills);
listView=(listView)findViewById(R.id.listView);
列表=新的ArrayList();
getJSON();
我的债务();
}
//新法案
公共债务{
mydebtsBtn=(按钮)findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图arg0){
Intent page1=新的Intent(ViewAllBills.this,myDebt.class);
星触觉(第1页);
}
});}
私人票据(){
JSONObject JSONObject=null;
试一试{
jsonObject=新的jsonObject(JSON_字符串);
JSONArray result=jsonObject.getJSONArray(Config.TAG\u JSON\u数组);
对于(inti=0;i请尝试以下操作:
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Button;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
public class ViewAllBills extends AppCompatActivity implements ListView.OnItemClickListener {
private Button mydebtsBtn;
private String JSON_STRING;
private ListView listView;
ArrayList<HashMap<String,String>> list;
ListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_all_bills);
listView = (ListView) findViewById(R.id.listView);
list = new ArrayList<HashMap<String, String>>();
getJSON();
myDebt();
}
//for new bill
public void myDebt() {
mydebtsBtn = (Button) findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
Intent page1 = new Intent(ViewAllBills.this,myDebt.class);
startActivity(page1);
}
});}
private void showBills(){
JSONObject jsonObject = null;
try {
jsonObject = new JSONObject(JSON_STRING);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
for(int i = 0; i<result.length(); i++){
JSONObject jo = result.getJSONObject(i);
String id = jo.getString(Config.TAG_ID);
String desc = jo.getString(Config.TAG_DESCRIPTION);
String amo = jo.getString(Config.TAG_AMOUNT);
HashMap<String,String> bills = new HashMap<>();
bills.put(Config.TAG_ID,id);
bills.put(Config.TAG_DESCRIPTION,desc);
bills.put(Config.TAG_AMOUNT,amo);
list.add(bills);
}
} catch (JSONException e) {
e.printStackTrace();
}
adapter = new SimpleAdapter(
ViewAllBills.this, list, R.layout.list_item,
new String[]{Config.TAG_ID,Config.TAG_DESCRIPTION,Config.TAG_AMOUNT},
new int[]{R.id.id, R.id.description,R.id.amountBill});
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
private void getJSON(){
class GetJSON extends AsyncTask<Void,Void,String>{
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewAllBills.this,"Fetching Data","Wait...",false,false);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
JSON_STRING = s;
showBills();
}
@Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequest(Config.URL_GET_ALL);
return s;
}
}
GetJSON gj = new GetJSON();
gj.execute();
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(ViewAllBills.this, ViewBills.class);
HashMap<String,String> map = list.get(position);
String billId = map.get(Config.TAG_ID).toString();
intent.putExtra(Config.BILL_ID,billId);
startActivity(intent);
}
}
导入android.app.ProgressDialog;
导入android.content.Intent;
导入android.os.AsyncTask;
导入android.support.v7.app.AppActivity;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ListAdapter;
导入android.widget.ListView;
导入android.widget.simpledapter;
导入android.widget.TextView;
导入android.widget.Toast;
导入android.widget.Button;
导入org.json.JSONArray;
导入org.json.JSONException;
导入org.json.JSONObject;
导入java.util.ArrayList;
导入java.util.HashMap;
公共类ViewAllBills扩展AppCompativeActivity实现ListView.OnItemClickListener{
专用按钮mydebtsBtn;
私有字符串JSON_字符串;
私有列表视图列表视图;
数组列表;
列表适配器;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\u view\u all\u bills);
listView=(listView)findViewById(R.id.listView);
列表=新的ArrayList();
getJSON();
我的债务();
}
//新法案
公共债务{
mydebtsBtn=(按钮)findViewById(R.id.buttonMyDebt);
mydebtsBtn.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图arg0){
Intent page1=新的Intent(ViewAllBills.this,myDebt.class);
星触觉(第1页);
}
});}
私人票据(){
JSONObject JSONObject=null;
试一试{
jsonObject=新的jsonObject(JSON_字符串);
杰索纳雷