Android ListView未出现在“活动”中
我正在制作一个应用程序，其中我希望使用PHPMYADMIN中的服务器在列表视图中向用户显示所有以前的订单详细信息 问题：未在活动中获取ListView，获取空白活动而不是ListView OrdersAdapter.java:Android ListView未出现在“活动”中,android,android-listview,Android,Android Listview,我正在制作一个应用程序，其中我希望使用PHPMYADMIN中的服务器在列表视图中向用户显示所有以前的订单详细信息 问题：未在活动中获取ListView，获取空白活动而不是ListView OrdersAdapter.java: public class OrdersAdapter extends BaseAdapter { TextView tName,tId,tOid ; String MemberID,resultServer,strMemberID,strName,str
public class OrdersAdapter extends BaseAdapter {
TextView tName,tId,tOid ;
String MemberID,resultServer,strMemberID,strName,strOrderID;
Activity activity;
LayoutInflater inflater;
ListView listView;
public OrdersAdapter(Activity a) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return 0;
// TODO Auto-generated method stub
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.listrow_orders, null); // listrow_cart
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
tId = (TextView)activity.findViewById(R.id.txtTotalAmount);
tName = (TextView)activity.findViewById(R.id.txtItemDetails);
String url = "http://172.16.0.4/res/order_fetch.php";
Intent intent= activity.getIntent();
MemberID = intent.getStringExtra("MemberID");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sMemberID", MemberID));
resultServer = getHttpPost(url,params);
strMemberID = "";
strName = "";
JSONObject c;
try {
c = new JSONObject(resultServer);
strMemberID = c.getString("TotalAmount");
strName = c.getString("ItemDetails");
if(!strMemberID.equals(""))
{
tName.setText(strName);
tId.setText(strMemberID);
}
else
{
tName.setText("-");
tId.setText("-");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return vi;
}
String getHttpPost(String url,List<NameValuePair> params) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
try {
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = client.execute(httpPost);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { // Status OK
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
} else {
Log.e("Log", "Failed to download result..");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str.toString();
}
}
public class OrdersActivity extends Activity
{
ListView mLstView1;
OrdersAdapter mViewOrdersAdpt;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_orders);
mLstView1 = (ListView) findViewById(R.id.listView1);
mViewOrdersAdpt = new OrdersAdapter(OrdersActivity.this);
mLstView1.setAdapter(mViewOrdersAdpt);
mLstView1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
final int position, long id)
{
}
});
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff" >
<include
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
layout="@layout/header_orders" />
<ListView
android:layout_width="match_parent"
android:id="@+id/listView1"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/header"
android:cacheColorHint="#00000000"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:layout_alignParentBottom="true" />
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="@drawable/btn_background"
android:orientation="horizontal"
android:padding="5dip" >
<TextView
android:id="@+id/txtTotalAmount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:textColor="#a60704"
android:text="TextView" />
<TextView
android:id="@+id/txtItemDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:textColor="#a60704"
android:text="Item Details Here" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtTotalAmount"
android:layout_below="@+id/txtTotalAmount"
android:layout_marginTop="17dp"
android:text="Ordered Items:"
android:textColor="#a60704"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Total Amount"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#a60704" />
</RelativeLayout>
公共类OrdersAdapter扩展BaseAdapter{
text视图tName、tId、tOid；
字符串MemberID、resultServer、strMemberID、strName、strOrderID；
活动；
充气机；
列表视图列表视图；
公共秩序助理（活动a）{
//TODO自动生成的构造函数存根
活动=a；
充气器=（LayoutInflater）activity.getSystemService（Context.LAYOUT\u充气器\u SERVICE）；
}
public int getCount（）{
返回0；
//TODO自动生成的方法存根
}
公共对象getItem（int位置）{
//TODO自动生成的方法存根
返回位置；
}
公共长getItemId（int位置）{
//TODO自动生成的方法存根
返回位置；
}
公共视图getView（最终整数位置、视图转换视图、视图组父视图）{
//TODO自动生成的方法存根
视图vi=转换视图；
if（convertView==null）
vi=充气机。充气（R.layout.listrow_orders，null）；//listrow_cart
//权限限制模式
如果（android.os.Build.VERSION.SDK_INT>9）{
StrictMode.ThreadPolicy policy=新建StrictMode.ThreadPolicy.Builder（）.permitAll（）.build（）；
StrictMode.setThreadPolicy（策略）；
tId=（TextView）activity.findViewById（R.id.txtTotalAmount）；
tName=（TextView）activity.findViewById（R.id.txtItemDetails）；
字符串url=”http://172.16.0.4/res/order_fetch.php";
Intent=activity.getIntent（）；
MemberID=intent.getStringExtra（“MemberID”）；
List params=new ArrayList（）；
添加（新的BasicNameValuePair（“sMemberID”，MemberID））；
resultServer=getHttpPost（url，参数）；
strMemberID=“”；
strName=“”；
JSONObject c；
试一试{
c=新的JSONObject（resultServer）；
strMemberID=c.getString（“TotalAmount”）；
strName=c.getString（“ItemDetails”）；
如果（！strMemberID.equals（“”）
{
tName.setText（strName）；
tId.setText（strMemberID）；
}
其他的
{
tName.setText（“-”）；
tId.setText（“-”）；
}
}捕获（JSONException e）{
//TODO自动生成的捕捉块
e、 printStackTrace（）；
}
}
返回vi；
}
字符串getHttpPost（字符串url，列表参数）{
StringBuilder str=新的StringBuilder（）；
HttpClient=new DefaultHttpClient（）；
HttpPost HttpPost=新的HttpPost（url）；
试一试{
setEntity（新的UrlEncodedFormEntity（参数））；
HttpResponse response=client.execute（httpPost）；
StatusLine StatusLine=response.getStatusLine（）；
int statusCode=statusLine.getStatusCode（）；
如果（statusCode==200）{//状态正常
HttpEntity=response.getEntity（）；
InputStream内容=entity.getContent（）；
BufferedReader=新的BufferedReader（新的InputStreamReader（内容））；
弦线；
而（（line=reader.readLine（））！=null）{
str.append（行）；
}
}否则{
Log.e（“日志”，“下载结果失败…”）；
}
}捕获（客户端协议例外e）{
e、 printStackTrace（）；
}捕获（IOE异常）{
e、 printStackTrace（）；
}
return str.toString（）；
}
}
public class OrdersAdapter extends BaseAdapter {
TextView tName,tId,tOid ;
String MemberID,resultServer,strMemberID,strName,strOrderID;
Activity activity;
LayoutInflater inflater;
ListView listView;
public OrdersAdapter(Activity a) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return 0;
// TODO Auto-generated method stub
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.listrow_orders, null); // listrow_cart
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
tId = (TextView)activity.findViewById(R.id.txtTotalAmount);
tName = (TextView)activity.findViewById(R.id.txtItemDetails);
String url = "http://172.16.0.4/res/order_fetch.php";
Intent intent= activity.getIntent();
MemberID = intent.getStringExtra("MemberID");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sMemberID", MemberID));
resultServer = getHttpPost(url,params);
strMemberID = "";
strName = "";
JSONObject c;
try {
c = new JSONObject(resultServer);
strMemberID = c.getString("TotalAmount");
strName = c.getString("ItemDetails");
if(!strMemberID.equals(""))
{
tName.setText(strName);
tId.setText(strMemberID);
}
else
{
tName.setText("-");
tId.setText("-");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return vi;
}
String getHttpPost(String url,List<NameValuePair> params) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
try {
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = client.execute(httpPost);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { // Status OK
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
} else {
Log.e("Log", "Failed to download result..");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str.toString();
}
}
public class OrdersActivity extends Activity
{
ListView mLstView1;
OrdersAdapter mViewOrdersAdpt;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_orders);
mLstView1 = (ListView) findViewById(R.id.listView1);
mViewOrdersAdpt = new OrdersAdapter(OrdersActivity.this);
mLstView1.setAdapter(mViewOrdersAdpt);
mLstView1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
final int position, long id)
{
}
});
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff" >
<include
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
layout="@layout/header_orders" />
<ListView
android:layout_width="match_parent"
android:id="@+id/listView1"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/header"
android:cacheColorHint="#00000000"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:layout_alignParentBottom="true" />
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="@drawable/btn_background"
android:orientation="horizontal"
android:padding="5dip" >
<TextView
android:id="@+id/txtTotalAmount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:textColor="#a60704"
android:text="TextView" />
<TextView
android:id="@+id/txtItemDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:textColor="#a60704"
android:text="Item Details Here" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtTotalAmount"
android:layout_below="@+id/txtTotalAmount"
android:layout_marginTop="17dp"
android:text="Ordered Items:"
android:textColor="#a60704"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Total Amount"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#a60704" />
</RelativeLayout>
公共类OrdersActivity扩展活动
{
列表视图mLstView1；
订单适配器mViewOrdersAdpt；
@SuppressLint（“新API”）
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_orders）；
mLstView1=（ListView）findViewById（R.id.listView1）；
mViewOrdersAdpt=newordersadapt（OrdersActivity.this）；
mLstView1.setAdapter（mViewOrdersAdpt）；
mLstView1.setOnItemClickListener（新的OnItemClickListener（）{
public void onItemClick（AdapterView父视图、视图v、，
最终整数位置，长id）
{
}
});
}
}
public class OrdersAdapter extends BaseAdapter {
TextView tName,tId,tOid ;
String MemberID,resultServer,strMemberID,strName,strOrderID;
Activity activity;
LayoutInflater inflater;
ListView listView;
public OrdersAdapter(Activity a) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return 0;
// TODO Auto-generated method stub
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.listrow_orders, null); // listrow_cart
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
tId = (TextView)activity.findViewById(R.id.txtTotalAmount);
tName = (TextView)activity.findViewById(R.id.txtItemDetails);
String url = "http://172.16.0.4/res/order_fetch.php";
Intent intent= activity.getIntent();
MemberID = intent.getStringExtra("MemberID");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sMemberID", MemberID));
resultServer = getHttpPost(url,params);
strMemberID = "";
strName = "";
JSONObject c;
try {
c = new JSONObject(resultServer);
strMemberID = c.getString("TotalAmount");
strName = c.getString("ItemDetails");
if(!strMemberID.equals(""))
{
tName.setText(strName);
tId.setText(strMemberID);
}
else
{
tName.setText("-");
tId.setText("-");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return vi;
}
String getHttpPost(String url,List<NameValuePair> params) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
try {
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = client.execute(httpPost);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { // Status OK
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
} else {
Log.e("Log", "Failed to download result..");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str.toString();
}
}
public class OrdersActivity extends Activity
{
ListView mLstView1;
OrdersAdapter mViewOrdersAdpt;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_orders);
mLstView1 = (ListView) findViewById(R.id.listView1);
mViewOrdersAdpt = new OrdersAdapter(OrdersActivity.this);
mLstView1.setAdapter(mViewOrdersAdpt);
mLstView1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
final int position, long id)
{
}
});
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff" >
<include
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
layout="@layout/header_orders" />
<ListView
android:layout_width="match_parent"
android:id="@+id/listView1"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/header"
android:cacheColorHint="#00000000"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:layout_alignParentBottom="true" />
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="@drawable/btn_background"
android:orientation="horizontal"
android:padding="5dip" >
<TextView
android:id="@+id/txtTotalAmount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:textColor="#a60704"
android:text="TextView" />
<TextView
android:id="@+id/txtItemDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:textColor="#a60704"
android:text="Item Details Here" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtTotalAmount"
android:layout_below="@+id/txtTotalAmount"
android:layout_marginTop="17dp"
android:text="Ordered Items:"
android:textColor="#a60704"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Total Amount"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#a60704" />
</RelativeLayout>
public class OrdersAdapter extends BaseAdapter {
TextView tName,tId,tOid ;
String MemberID,resultServer,strMemberID,strName,strOrderID;
Activity activity;
LayoutInflater inflater;
ListView listView;
public OrdersAdapter(Activity a) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return 0;
// TODO Auto-generated method stub
}
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
View vi = convertView;
if (convertView == null)
vi = inflater.inflate(R.layout.listrow_orders, null); // listrow_cart
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
tId = (TextView)activity.findViewById(R.id.txtTotalAmount);
tName = (TextView)activity.findViewById(R.id.txtItemDetails);
String url = "http://172.16.0.4/res/order_fetch.php";
Intent intent= activity.getIntent();
MemberID = intent.getStringExtra("MemberID");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sMemberID", MemberID));
resultServer = getHttpPost(url,params);
strMemberID = "";
strName = "";
JSONObject c;
try {
c = new JSONObject(resultServer);
strMemberID = c.getString("TotalAmount");
strName = c.getString("ItemDetails");
if(!strMemberID.equals(""))
{
tName.setText(strName);
tId.setText(strMemberID);
}
else
{
tName.setText("-");
tId.setText("-");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return vi;
}
String getHttpPost(String url,List<NameValuePair> params) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
try {
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse response = client.execute(httpPost);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { // Status OK
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
} else {
Log.e("Log", "Failed to download result..");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str.toString();
}
}
public class OrdersActivity extends Activity
{
ListView mLstView1;
OrdersAdapter mViewOrdersAdpt;
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_orders);
mLstView1 = (ListView) findViewById(R.id.listView1);
mViewOrdersAdpt = new OrdersAdapter(OrdersActivity.this);
mLstView1.setAdapter(mViewOrdersAdpt);
mLstView1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v,
final int position, long id)
{
}
});
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff" >
<include
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
layout="@layout/header_orders" />
<ListView
android:layout_width="match_parent"
android:id="@+id/listView1"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/header"
android:cacheColorHint="#00000000"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:layout_alignParentBottom="true" />
</RelativeLayout>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:background="@drawable/btn_background"
android:orientation="horizontal"
android:padding="5dip" >
<TextView
android:id="@+id/txtTotalAmount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:textColor="#a60704"
android:text="TextView" />
<TextView
android:id="@+id/txtItemDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/textView3"
android:textColor="#a60704"
android:text="Item Details Here" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/txtTotalAmount"
android:layout_below="@+id/txtTotalAmount"
android:layout_marginTop="17dp"
android:text="Ordered Items:"
android:textColor="#a60704"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Total Amount"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#a60704" />
</RelativeLayout>
public int getCount() {
return SIZE_OF_ARRAYLIST;
}
如果写入返回0，则不会显示列表。所以您需要返回arrayList的大小，并传递一个集合，比如构造函数中的字符串
public OrdersAdapter(Activity a, List stringsToShow) {
// TODO Auto-generated constructor stub
activity = a;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.stringsToShow = stringsToShow;
}
public int getCount() {
return stringsToShow.size();
}
并避免在getView（）中执行太多操作。。Kamal karte ho Pande ji.如果在
活动中解析json
而不是BaseAdapter
，getView（）
将被多次调用，因此json将被多次解析