我在我的第二个ListView中有一个activity.OnItemClick我称之为web服务并试图获取数据。之后我转到第三个活动，也有一个ListView描述以前的活动ListView项目。
我想在填充这个ListView之前显示一个进度对话框。
我不明白如何在ListView上做到这一点？有谁知道怎么做？
我的守则 -
third activity.Java
package com.google.iprotect;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.xmlpull.v1.XmlPullParserException;
import com.google.iprotect.layout.TitleBarLayout;
import android.app.Activity;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.content.res.XmlResourceParser;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
public class ThirdActivity extends ListActivity implements OnItemClickListener{
JSONArray jArray1,jArray2;
String one,two,three,tablename;
String color,r;
JSONObject responseJSON;
TitleBarLayout titlebarLayout;
final ArrayList<Tables> arraylist = new ArrayList<Tables>();
TextView tableName;
ColorStateList colorStateList1;
String email1,password1;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.thirdactivity);
ListView lv=getListView();
lv.setOnItemClickListener(this);
tablename=getIntent().getExtras().getString("Table Name");
email1 = getIntent().getExtras().getString("email");
password1 =getIntent().getExtras().getString("password");
titlebarLayout = new TitleBarLayout(ThirdActivity.this);
titlebarLayout.setLeftButtonText("go Back");
titlebarLayout.setRightButtonText("Logout");
titlebarLayout.setTitle(tablename);
titlebarLayout.setLeftButtonSize(70,40);
titlebarLayout.setRightButtonSize(70,40);
//titlebarLayout.setLeftButtonLeftDrawable(R.drawable.refresh);
//titlebarLayout.setRightButtonLeftDrawable(R.drawable.buttonrefresh);
//titlebarLayout.setLeftButtonBackgroundColor(Color.rgb(255,255,255));
//titlebarLayout.setRightButtonBackgroundColor(Color.rgb(34,49,64));
//titlebarLayout.setLeftButtonTextColor(Color.rgb(255,255,255));
//titlebarLayout.setRightButtonTextColor(Color.rgb(255,255,0));
XmlResourceParser parser1 =getResources().getXml(R.color.colorstatelist);
try {
colorStateList1 = ColorStateList.createFromXml(getResources(), parser1);
titlebarLayout.setRightButtonTextColor(colorStateList1);
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
OnClickListener listener = new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == R.id.left_button) {
Intent intent = new Intent(ThirdActivity.this,SecondActivity.class);
intent.putExtra("email", email1);
intent.putExtra("password", password1);
startActivity(intent);
finish();
} else if (v.getId() == R.id.right_button) {
Intent intent = new Intent(ThirdActivity.this,
MainActivity.class);
//intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.setFlags( Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
ThirdActivity.this.startActivity(intent);
}
}
};
titlebarLayout.setLeftButtonOnClickListener(listener);
titlebarLayout.setRightButtonOnClickListener(listener);
updateTableList();
}
private void updateTableList() {
// TODO Auto-generated method stub
//final ProgressDialog pd1=ProgressDialog.show(this, "Calling Webservice", "Waiting...", true, false);
final ProgressBar pbHeaderProgress = (ProgressBar) findViewById(R.id.pbHeaderProgress);
new AsyncTask<Void, Void, Void>() {
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
pbHeaderProgress.setVisibility(View.VISIBLE);
}
protected Void doInBackground(Void... params) {
r = invokeWebService1(tablename);
//pd1.dismiss();
try {
responseJSON = new JSONObject(r);
//json reading
jArray1 = responseJSON.getJSONArray("FirstThree");//get JSONArray jArray1 from JSONObject with name FirstThree
jArray2 = responseJSON.getJSONArray("Color");//get JSONArray jArray2 from JSONOobject with name Color
JSONObject json_data1 = null;
JSONObject json_data2 = null;
for (int i = 0; i < jArray1.length(); i++) {
json_data1 = jArray1.getJSONObject(i);//get JSONObject json_data1 from JSONArray at index i;
one = json_data1.getString("One");//get value from JSONObject json_data1 with key "One"
two = json_data1.getString("Two");
three = json_data1.getString("Three");
json_data2 = jArray2.getJSONObject(i);
color = json_data2.getString("color");//get value from JSONObject json_data2 with key "color"
Tables tables = new Tables();
//set value to Tables Class
tables.column1 = one;
tables.column2 = two;
tables.column3 = three;
tables.tableName=tablename;
tables.color=color;
//add Tables object into ArrayList<Tables>
arraylist.add(tables);
Log.i("ONE", json_data1.getString("One"));
Log.i("TWO", json_data1.getString("Two"));
Log.i("THREE", json_data1.getString("Three"));
Log.i("color",""+ json_data2.getString("color"));
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Void result) {
pbHeaderProgress.setVisibility(View.GONE);
//Custom Adapter for ListView
TableDetailAdapter adaptor = new TableDetailAdapter(ThirdActivity.this,
R.layout.table_data_list_item, arraylist);
setListAdapter(adaptor);
}
}.execute();
}
protected String invokeWebService1(String tablename2) {
// TODO Auto-generated method stub
String response = "";
try {
WebService webService = new WebService(
"http://sphinx-solution.com/iProtect/api.php?");
// Pass the parameters if needed
Map<String, String> params = new HashMap<String, String>();
params.put("action", "getTableRecords");
params.put("tablename", tablename2);
params.put("email", email1);
params.put("password", password1);
// Get JSON response from server the "" are where the method name
// would normally go if needed example
response = webService.WebGet("auth", params);
} catch (Exception e) {
Log.d("Error: ", e.getMessage());
}
return response;
}
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
// TODO Auto-generated method stub
Log.v("", "Click ListItem Number "+position);
Intent intent = new Intent(ThirdActivity.this,FourthActivity.class);
intent.putExtra("Json", responseJSON.toString());//sending json Object as a string to next activity
intent.putExtra("Table Name", tablename);
intent.putExtra("email", email1);
intent.putExtra("password", password1);
intent.putExtra("Item No", position);
startActivity(intent);
}
}
thirdactivity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/linlaHeaderProgress"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ThirdActivity" >
<include
android:id="@+id/titlebar"
layout="@layout/titlebar_layout" />
<ProgressBar
android:id="@+id/pbHeaderProgress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="2" >
</ProgressBar>
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="260dp"
android:layout_weight="5.04">
</ListView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="@dimen/titlebar_height"
android:layout_alignParentBottom="true"
android:background="@color/footer_bg_color"
android:gravity="bottom"
android:orientation="horizontal" >
<include
android:id="@+id/footer"
android:layout_height="@dimen/titlebar_height"
android:layout_gravity="bottom|center_horizontal"
layout="@layout/footer_layout" />
</LinearLayout>
</LinearLayout>
有几种方法可以在加载activity时显示进度条（圆圈）。在你的情况下，其中有一个ListView。
在ACTIONBAR
如果你使用的是ActionBar，你可以像这样调用ProgressBar（这可能会在你的onCreate()中
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
setProgressBarIndeterminateVisibility(true);
完成显示列表后，隐藏它。
setProgressBarIndeterminateVisibility(false);
在布局中（XML）
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/linlaHeaderProgress"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical"
android:visibility="gone" >
<ProgressBar
android:id="@+id/pbHeaderProgress"
style="@style/Spinner"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ProgressBar>
</LinearLayout>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:cacheColorHint="@android:color/transparent"
android:divider="#00000000"
android:dividerHeight="0dp"
android:fadingEdge="none"
android:persistentDrawingCache="scrolling"
android:smoothScrollbar="false" >
</ListView>
</LinearLayout>
在您的活动（Java）中，我使用AsyncTask来获取列表的数据。那么，在AsyncTask的onPreExecute()中，我使用这样的东西：
// CAST THE LINEARLAYOUT HOLDING THE MAIN PROGRESS (SPINNER)
LinearLayout linlaHeaderProgress = (LinearLayout) findViewById(R.id.linlaHeaderProgress);
@Override
protected void onPreExecute() {
// SHOW THE SPINNER WHILE LOADING FEEDS
linlaHeaderProgress.setVisibility(View.VISIBLE);
}
在将适配器设置为onPostExecute()之后，在ListView中：
@Override
protected void onPostExecute(Void result) {
// SET THE ADAPTER TO THE LISTVIEW
lv.setAdapter(adapter);
// CHANGE THE LOADINGMORE STATUS TO PERMIT FETCHING MORE DATA
loadingMore = false;
// HIDE THE SPINNER AFTER LOADING FEEDS
linlaHeaderProgress.setVisibility(View.GONE);
}
编辑：这是它在加载几个ListViews之一时在我的应用程序中的外观
单击选项或您的需要使用此内部按钮：
final ProgressDialog progressDialog;
progressDialog = new ProgressDialog(getApplicationContext());
progressDialog.setMessage("Loading..."); // Setting Message
progressDialog.setTitle("ProgressDialog"); // Setting Title
progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER); // Progress Dialog Style Spinner
progressDialog.show(); // Display Progress Dialog
progressDialog.setCancelable(false);
new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(5000);
} catch (Exception e) {
e.printStackTrace();
}
progressDialog.dismiss();
}
}).start();
流程栏：
相关性：
implementation 'com.github.castorflex.smoothprogressbar:library:1.0.0'
XML：
<fr.castorflex.android.smoothprogressbar.SmoothProgressBar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/myProcessbar"
android:layout_width="match_parent"
android:layout_height="10dp"
android:indeterminate="true" />
在Res-> color
<color name="pocket_color_1">#ff1635</color>
<integer-array name="pocket_background_colors">
<item>@color/pocket_color_1</item>
</integer-array>
<color name="pocket_color_stop">#00ff00</color>
<integer-array name="pocket_background_stop">
<item>@color/pocket_color_stop</item>
</integer-array>
在主要：
public class MainActivity extends AppCompatActivity{
SmoothProgressBar smoothProgressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
smoothProgressBar=findViewById(R.id.myProcessbar);
showProcessBar();
stopAnimation(); // call when required to stop process
}
public void showProcessBar(){
smoothProgressBar.setVisibility(View.VISIBLE);
smoothProgressBar.setIndeterminateDrawable(new SmoothProgressDrawable.Builder(getApplicationContext())
.interpolator(new AccelerateInterpolator())
.progressiveStart(true)
.progressiveStopSpeed(1000)
.build());
smoothProgressBar.setSmoothProgressDrawableBackgroundDrawable(
SmoothProgressBarUtils.generateDrawableWithColors(
getResources().getIntArray(R.array.pocket_background_colors),
((SmoothProgressDrawable) smoothProgressBar.getIndeterminateDrawable()).getStrokeWidth()));
}
public void stopAnimation(){
smoothProgressBar.setSmoothProgressDrawableBackgroundDrawable(
SmoothProgressBarUtils.generateDrawableWithColors(
getResources().getIntArray(R.array.pocket_background_stop),
((SmoothProgressDrawable) smoothProgressBar.getIndeterminateDrawable()).getStrokeWidth()));
smoothProgressBar.progressiveStop();
Handler handler=new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
smoothProgressBar.animate().alpha(0.0f).setDuration(6000).translationY(1000);
smoothProgressBar.setVisibility(View.GONE);
}
},1000);
}
}
我用这个：
loading = ProgressDialog.show(example.this,"",null, true, true);
你可以更容易地做到这一点 资料来源：http://www.tutorialspoint.com/android/android_loading_spinner.htm 它帮助了我。
布局：
<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true" />
在xml中定义它之后，你必须通过ProgressBar类在java文件中获得它的引用。其语法如下：
private ProgressBar spinner;
spinner = (ProgressBar)findViewById(R.id.progressBar1);
之后，您可以使其消失，并在需要时通过setVisibility方法将其恢复。其语法如下：
spinner.setVisibility(View.GONE);
spinner.setVisibility(View.VISIBLE);
我用这个列表视图加载可能有帮助。
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="5dp"
android:paddingRight="5dp" >
<LinearLayout
android:id="@+id/progressbar_view"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:orientation="horizontal" >
<ProgressBar
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:text="Loading data..." />
</LinearLayout>
<View
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="#C0C0C0" />
</LinearLayout>
<ListView
android:id="@+id/listView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_marginTop="1dip"
android:visibility="gone" />
</RelativeLayout>
我的MainActivity类是，
public class MainActivity extends Activity {
ListView listView;
LinearLayout layout;
List<String> stringValues;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.listView);
layout = (LinearLayout) findViewById(R.id.progressbar_view);
stringValues = new ArrayList<String>();
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, stringValues);
listView.setAdapter(adapter);
new Task().execute();
}
class Task extends AsyncTask<String, Integer, Boolean> {
@Override
protected void onPreExecute() {
layout.setVisibility(View.VISIBLE);
listView.setVisibility(View.GONE);
super.onPreExecute();
}
@Override
protected void onPostExecute(Boolean result) {
layout.setVisibility(View.GONE);
listView.setVisibility(View.VISIBLE);
adapter.notifyDataSetChanged();
super.onPostExecute(result);
}
@Override
protected Boolean doInBackground(String... params) {
stringValues.add("String 1");
stringValues.add("String 2");
stringValues.add("String 3");
stringValues.add("String 4");
stringValues.add("String 5");
try {
Thread.sleep(3000);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
}
此活动显示3sec的进度，然后它将显示listview，而不是静态地将数据添加到stringValues列表，您可以从doInBackground（）中的服务器获取数据并显示它。
请使用tutorialspoint.com的样本。整个实现只需要几行代码而无需更改xml文件。希望这可以帮助。
第1步：导入库
import android.app.ProgressDialog;
第2步：声明ProgressDialog全局变量
ProgressDialog loading = null;
步骤3：启动新的ProgressDialog并使用以下属性（请注意，此示例仅涵盖没有实时进度状态的基本圆形加载条）。
loading = new ProgressDialog(v.getContext());
loading.setCancelable(true);
loading.setMessage(Constant.Message.AuthenticatingUser);
loading.setProgressStyle(ProgressDialog.STYLE_SPINNER);
步骤4：如果您使用的是AsyncTasks，则可以在onPreExecute方法中开始显示该对话框。否则，只需将代码放在按钮onClick事件的开头即可。
loading.show();
步骤5：如果您使用的是AsyncTasks，则可以通过将代码放在onPostExecute方法中来关闭进度对话框。否则，只需在关闭按钮onClick事件之前放置代码。
loading.dismiss();
用我的Nexus 5 android v4.0.3测试它。祝好运！
你在扩展ListActivity吗？
如果是这样，请在xml中放入一个带有以下行的循环进度对话框
<ProgressBar
android:id="@android:id/empty"
...other stuff...
/>
现在，进度指示器将显示，直到您拥有所有列表视图信息，并设置适配器。此时，它将返回列表视图，进度条将消失。
ProgressDialog dialog = ProgressDialog.show(Example.this, "", "Loading...", true);
在drawable中创建任何名称（比如progressBar.xml）的xml文件，并在color.xml中添加<color name="silverGrey">#C0C0C0</color>。
<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
android:fromDegrees="0"
android:pivotX="50%"
android:pivotY="50%"
android:toDegrees="720" >
<shape
android:innerRadiusRatio="3"
android:shape="ring"
android:thicknessRatio="6"
android:useLevel="false" >
<size
android:height="200dip"
android:width="300dip" />
<gradient
android:angle="0"
android:endColor="@color/silverGrey"
android:startColor="@android:color/transparent"
android:type="sweep"
android:useLevel="false" />
</shape>
</rotate>
现在在您的listView中添加此代码的xml文件中：
<ListView
android:id="@+id/list_form_statusMain"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
<ProgressBar
android:id="@+id/progressBar"
style="@style/CustomAlertDialogStyle"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_centerInParent="true"
android:layout_gravity="center_horizontal"
android:indeterminate="true"
android:indeterminateDrawable="@drawable/circularprogress"
android:visibility="gone"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>
在AsyncTask中的方法：
@Override
protected void onPreExecute()
{
progressbar_view.setVisibility(View.VISIBLE);
// your code
}
在onPostExecute中：
@Override
protected void onPostExecute(String s)
{
progressbar_view.setVisibility(View.GONE);
//your code
}
您可以将ProgressBar添加到listview页脚：
private ListView listview;
private ProgressBar progressBar;
...
progressBar = (ProgressBar) LayoutInflater.from(this).inflate(R.layout.progress_bar, null);
listview.addFooterView(progressBar);
布局/ progress_bar.xml
<?xml version="1.0" encoding="utf-8"?>
<ProgressBar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/load_progress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:indeterminate="true"
/>
当数据加载到适配器视图调用时：
listview.removeFooterView(progressBar);
我建议你在使用listview或recyclerview时使用SwipeRefreshLayout。像这样
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swiperefresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/card_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
只包装你的视图，这将在加载数据时创建一个刷新动画，或者像我们在许多应用程序中那样刷新屏幕。 这是如何使用它的文档： https://developer.android.com/training/swipe/add-swipe-interface.html https://developer.android.com/training/swipe/respond-refresh-request.html
快乐的编码！