Android 屏幕上的活动指示器
在我的应用程序中，我想显示一个活动指示器。在我的应用程序中，我有一个galleryview，如果用户单击galleryview中的项目，我将从URL加载数据并在listview中显示。在加载和显示数据之间，我需要一个指示器 我的活动代码：Android 屏幕上的活动指示器,android,widget,activity-indicator,Android,Widget,Activity Indicator,在我的应用程序中，我想显示一个活动指示器。在我的应用程序中，我有一个galleryview，如果用户单击galleryview中的项目，我将从URL加载数据并在listview中显示。在加载和显示数据之间，我需要一个指示器 我的活动代码： gal.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> par
gal.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v, int position,
long id) {
// TODO Auto-generated method stub
context.getInstance().setAppVariable("sectionurl", adapter.sectionurl[position]);
ListView list=(ListView)findViewById(R.id.list);
listadapter = new ListViewwithimageAdapter(this);
list.setAdapter(listadapter);
}
});
public View getView(int position, View convertView, ViewGroup parent)
{
ProgressDialog mDialog = new ProgressDialog(contxt);
mDialog.setMessage("Please wait...");
mDialog.setCancelable(false);
mDialog.show();
// TODO Auto-generated method stub
Bitmap bitmap = DownloadImage(
kickerimage[position] );
// View listView = convertView;
if (convertView == null)
{
//this should only ever run if you do not get a view back
LayoutInflater inflater = (LayoutInflater) contxt
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.homelistrow, null);
}
// else
// {
// holder.removeAllViews();
// }
// View listView;
// if (convertView == null)
// {
// listView = new View(contxt);
// LinearLayout holder = (LinearLayout)convertView.findViewById(android.R.id);
//// holder = inflater.inflate(R.layout.homelistrow, null);
// System.out.println("pos="+position);
// System.out.println("item="+getItem(position));
// else
// {
TextView textView = (TextView) convertView
.findViewById(R.id.name_label);
textView.setText(itemsarray[position]);
ImageView imageView = (ImageView) convertView
.findViewById(R.id.icon);
imageView.setImageBitmap(bitmap);
// }
// else
// {
// listView = (View) convertView;
// }
// }
mDialog.dismiss();
return convertView ;
}
11-28 16:01:55.589: D/AndroidRuntime(788): Shutting down VM
11-28 16:01:55.589: W/dalvikvm(788): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
11-28 16:01:55.589: E/AndroidRuntime(788): Uncaught handler: thread main exiting due to uncaught exception
11-28 16:01:55.650: E/AndroidRuntime(788): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewRoot.setView(ViewRoot.java:472)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.app.Dialog.show(Dialog.java:239)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.newspaper.NewsPaperNov28MainGalleryActivity$1.onItemClick(NewsPaperNov28MainGalleryActivity.java:68)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.widget.AdapterView.performItemClick(AdapterView.java:284)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.widget.Gallery.onSingleTapUp(Gallery.java:864)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.GestureDetector.onTouchEvent(GestureDetector.java:506)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.widget.Gallery.onTouchEvent(Gallery.java:839)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.View.dispatchTouchEvent(View.java:3709)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:852)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.os.Handler.dispatchMessage(Handler.java:99)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.os.Looper.loop(Looper.java:123)
11-28 16:01:55.650: E/AndroidRuntime(788): at android.app.ActivityThread.main(ActivityThread.java:4363)
11-28 16:01:55.650: E/AndroidRuntime(788): at java.lang.reflect.Method.invokeNative(Native Method)
11-28 16:01:55.650: E/AndroidRuntime(788): at java.lang.reflect.Method.invoke(Method.java:521)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
11-28 16:01:55.650: E/AndroidRuntime(788): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
11-28 16:01:55.650: E/AndroidRuntime(788): at dalvik.system.NativeStart.main(Native Method)
11-28 16:01:55.739: I/dalvikvm(788): threadid=7: reacting to signal 3
11-28 16:01:55.739: I/dalvikvm(788): Wrote stack trace to '/data/anr/traces.txt'
mDialog.dismiss();
//This is my AsyncTask which needed some time
new InsertDbTask().execute();
//Actual task
public class InsertDbTask extends AsyncTask<Void, Void, Void> {
private final ProgressDialog dialog = new ProgressDialog(mContext);
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
prepareInsert();
} catch (Exception e) {
// Log.e("Error: ", e.getMessage());
}
return null;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
this.dialog.setCanceledOnTouchOutside(false);
this.dialog.setMessage("Inserting Record In Local DB Please Wait.");
this.dialog.show();
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
saveButton.setEnabled(true); // enable save button after execution of prepareInsert().
}
}
public void prepareInsert()
{
// Do something
}
//这是我的异步任务，需要一些时间
新建InsertDbTask（）.execute（）；
//实际任务
公共类InsertDbTask扩展了AsyncTask{
private final ProgressDialog=新建ProgressDialog（mContext）；
@凌驾
受保护的Void doInBackground（Void…参数）{
//TODO自动生成的方法存根
试一试{
准备插入（）；
}捕获（例外e）{
//Log.e（“错误：，e.getMessage（））；
}
返回null；
}
@凌驾
受保护的void onPreExecute（）{
//TODO自动生成的方法存根
super.onPreExecute（）；
this.dialog.setCanceledOnTouchOutside（false）；
this.dialog.setMessage（“在本地数据库中插入记录，请稍候”）；
this.dialog.show（）；
}
@凌驾
受保护的void onPostExecute（void结果）{
//TODO自动生成的方法存根
super.onPostExecute（结果）；
if（this.dialog.isShowing（））{
this.dialog.disclose（）；
}
saveButton.setEnabled（true）；//在执行prepareInsert（）后启用保存按钮。
}
}
公共无效准备插入（）
{
//做点什么
}
mDialog.dismiss();
//This is my AsyncTask which needed some time
new InsertDbTask().execute();
//Actual task
public class InsertDbTask extends AsyncTask<Void, Void, Void> {
private final ProgressDialog dialog = new ProgressDialog(mContext);
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
try {
prepareInsert();
} catch (Exception e) {
// Log.e("Error: ", e.getMessage());
}
return null;
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
this.dialog.setCanceledOnTouchOutside(false);
this.dialog.setMessage("Inserting Record In Local DB Please Wait.");
this.dialog.show();
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
saveButton.setEnabled(true); // enable save button after execution of prepareInsert().
}
}
public void prepareInsert()
{
// Do something
}
//这是我的异步任务，需要一些时间
新建InsertDbTask（）.execute（）；
//实际任务
公共类InsertDbTask扩展了AsyncTask{
private final ProgressDialog=新建ProgressDialog（mContext）；
@凌驾
受保护的Void doInBackground（Void…参数）{
//TODO自动生成的方法存根
试一试{
准备插入（）；
}捕获（例外e）{
//Log.e（“错误：，e.getMessage（））；
}
返回null；
}
@凌驾
受保护的void onPreExecute（）{
//TODO自动生成的方法存根
super.onPreExecute（）；
this.dialog.setCanceledOnTouchOutside（false）；
this.dialog.setMessage（“在本地数据库中插入记录，请稍候”）；
this.dialog.show（）；
}
@凌驾
受保护的void onPostExecute（void结果）{
//TODO自动生成的方法存根
super.onPostExecute（结果）；
if（this.dialog.isShowing（））{
this.dialog.disclose（）；
}
saveButton.setEnabled（true）；//在执行prepareInsert（）后启用保存按钮。
}
}
公共无效准备插入（）
{
//做点什么
}
gal.setonimclickListenergal.setonimclickListenerListView list=（ListView）findViewById（R.id.list）；listadapter=新的ListViewwithimageAdapter（此）；list.setAdapter（listadapter）获取数据后在postexecute中让我们再次复制粘贴：在gal.setOnItemClickListener中，在其post execute Disease对话框和更新UI适配器上单击mentod start AsyncTask with progressdialog：放置此ListView列表=（ListView）findViewById（R.id.list）；listadapter=新的ListViewwithimageAdapter（此）；list.setAdapter（listadapter）；在获取数据后的postexecute中，不要在getview（）类中添加。getview调用了eachtime以创建布局行。因此，您需要在获取数据之前放置asynctask代码。在gal.setOnItemClickListener中，单击其post execute Disease dialog&update UI适配器上的mentod start asynctask with progressdialog：放置此ListView list=（ListView）findViewById（R.id.list）；listadapter=新的ListViewwithimageAdapter（此）；list.setAdapter（listadapter）获取数据后在postexecute中让我们再次复制粘贴：在gal.setOnItemClickListener中，在其post execute Disease对话框和更新UI适配器上单击mentod start AsyncTask with progressdialog：放置此ListView列表=（ListView）findViewById（R.id.list）；listadapter=新的ListViewwithimageAdapter（此）；list.setAdapter（listadapter）；在POST中，在获取数据后执行