Java 如何在创建文件期间显示进度条?
如何在创建PDF文件期间单击按钮时显示进度条,并在创建完文件后将其隐藏Java 如何在创建文件期间显示进度条?,java,android,progress,Java,Android,Progress,如何在创建PDF文件期间单击按钮时显示进度条,并在创建完文件后将其隐藏 public class TwoFragment extends android.support.v4.app.Fragment { private View v; Intent chooser=null; String myInt=""; String ciao=""; private String string=""; private ProgressBar pdfP
public class TwoFragment extends android.support.v4.app.Fragment {
private View v;
Intent chooser=null;
String myInt="";
String ciao="";
private String string="";
private ProgressBar pdfProgress;
ProgressTask task;
public TwoFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_two, container, false);
Button mButton = (Button) rootView.findViewById(R.id.newbutton);
mButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//sendemail();
// pdfProgress.setVisibility(View.GONE);
/* pdfProgress.setVisibility(View.VISIBLE);
createPDF();
pdfProgress.setVisibility(View.GONE);
viewPDF();*/
/*MyAsyncTask myTask = new MyAsyncTask();
myTask.execute();
*/
showProgress();
}
});
TextView titolo3 = (TextView)rootView.findViewById(R.id.result);
TextView titolo2 = (TextView)rootView.findViewById(R.id.result2);
TextView titolo4 = (TextView)rootView.findViewById(R.id.resultpizze);
pdfProgress = (ProgressBar)rootView.findViewById(R.id.progressbar);
pdfProgress.setVisibility(View.GONE);
//pdfProgress.setVisibility(View.INVISIBLE);
//TextView titolo = (TextView)rootView.findViewById(R.id.quantità3);
/* class MyAsyncTask extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
// This runs in new thread!!!
// Always run long operations in another thread, so GUI will never be blocked
createPDF();
return null;
}
@Override
protected void onPostExecute(Void v) {
// This runs in MAIN thread, after the job's done.
// You always have to update gui from main thread
pdfProgress.setVisibility(View.GONE);
viewPDF();
}
}
*/
Bundle bundle2=getArguments();
if(bundle2 != null){
string = bundle2.getString("scelta2");
titolo3.setText(string);
}
/* Bundle bundle2=getArguments();
if(bundle2 != null){
// myInt = bundle2.getString("scelta2",myInt);
cacca=bundle2.getString("result",null);
//cacca=myInt;
// Log.d("ciao",cacca);
titolo3.setText(cacca);
}*/
//titolo3.setText(myInt);
/* Bundle bundle3=getArguments();
if(bundle3 != null){
// String myInt3 = bundle3.getString("totalebirre", null);
// cazzo2=Integer.parseInt(myInt3);
int cazzo2=bundle3.getInt("totalebirre");
titolo2.setText(String.valueOf(cazzo2));
}
Bundle bundle=getArguments();
if(bundle != null){
// String myInt2 = bundle2.getString("totalepizze", null);
// cazzo=Integer.parseInt(myInt2);
//titolo2.setText(myInt2);
String string=bundle.getString("scelta3", null);
titolo4.setText(string);
}
*/
return rootView;
}
/* public void sendemail(){
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setData(Uri.parse("mailto:"));
String[] to={"marco_marcoletto@hotmail.it"};
intent.putExtra(Intent.EXTRA_EMAIL,to);
intent.putExtra(Intent.EXTRA_SUBJECT, "ciao");
intent.putExtra(Intent.EXTRA_TEXT, "zao");
intent.setType("message/rfc822");
chooser=intent.createChooser(intent,"manda email");
startActivity(chooser);
}*/
//@TargetApi(Build.VERSION_CODES.M)
public void createPDF() {
Document doc = new Document();
try {
String path = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/droidText";
File dir = new File(path);
if (!dir.exists())
dir.mkdirs();
Log.d("PDFCreator", "PDF Path: " + path);
//File file = new File(dir, "sample.pdf");
File file = new File(dir, "salve.pdf");
FileOutputStream fOut = new FileOutputStream(file);
PdfWriter.getInstance(doc, fOut);
// open the document
doc.open();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Bitmap bitmap = BitmapFactory.decodeResource(getContext()
.getResources(), R.drawable.androtuto);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
Image myImg = Image.getInstance(stream.toByteArray());
myImg.setAlignment(Image.MIDDLE);
// add image to document
doc.add(myImg);
Paragraph p1 = new Paragraph(string);
Font paraFont = new Font(Font.COURIER);
p1.setAlignment(Paragraph.ALIGN_CENTER);
p1.setFont(paraFont);
// add paragraph to document
doc.add(p1);
Paragraph p2 = new Paragraph("Bonjour Android Tuto");
Font paraFont2 = new Font(Font.COURIER, 14.0f, Color.GREEN);
p2.setAlignment(Paragraph.ALIGN_CENTER);
p2.setFont(paraFont2);
doc.add(p2);
stream = new ByteArrayOutputStream();
bitmap = BitmapFactory.decodeResource(getContext()
.getResources(), R.drawable.android);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
myImg = Image.getInstance(stream.toByteArray());
myImg.setAlignment(Image.MIDDLE);
// add image to document
doc.add(myImg);
// set footer
Phrase footerText = new Phrase("Pied de page ");
HeaderFooter pdfFooter = new HeaderFooter(footerText, false);
doc.setFooter(pdfFooter);
} catch (DocumentException de) {
// Log.e("PDFCreator", "DocumentException:" + de);
Log.e("PDFCreator", "DocumentException:" + de.getMessage());
} catch (IOException e) {
// Log.e("PDFCreator", "ioException:" + e);
Log.e("PDFCreator", "DocumentException:" + e.getMessage());
} finally {
doc.close();
}
}
public void viewPDF(){
String path = "/sdcard/droidText/salve.pdf";
File targetFile = new File(path);
Uri targetUri = Uri.fromFile(targetFile);
Intent intent;
intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(targetUri, "application/pdf");
startActivity(intent);
}
private class ProgressTask extends AsyncTask<Integer,Integer,Void> {
protected void onPreExecute() {
pdfProgress.setMax(100); // set maximum progress to 100.
}
protected void onCancelled() {
pdfProgress.setMax(0); // stop the progress
}
protected Void doInBackground(Integer... params) {
int start=params[0];
for(int i=start;i<=100;i+=5){
try {
boolean cancelled=isCancelled();
if(!cancelled) {
publishProgress(i);
Log.v("Progress","increment " + i);
//onProgressUpdate(i);
SystemClock.sleep(1000);
}
createPDF();
} catch (Exception e) {
Log.e("Error", e.toString());
}
}
return null;
}
protected void onProgressUpdate(Integer... values) {
// increment progress bar by progress value
//setProgress(10);
}
protected void onPostExecute(Void result) {
// async task finished
Log.v("Progress", "Finished");
viewPDF();
}
}
public void showProgress() {
task = new ProgressTask();
// start progress bar with initial progress 10
///////////////////task.execute(10,10,null);
task.execute(10);
}
}
public类TwoFragment扩展了android.support.v4.app.Fragment{
私人观点v;
意向选择器=null;
字符串myInt=“”;
字符串ciao=“”;
私有字符串=”;
私人ProgressBar pdfProgress;
进度任务;
公共双片段(){
//必需的空公共构造函数
}
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
//为该碎片膨胀布局
视图根视图=充气机。充气(R.layout.fragment\u-two,容器,false);
按钮mButton=(按钮)rootView.findviewbyd(R.id.newbutton);
mButton.setOnClickListener(新视图.OnClickListener(){
公共void onClick(视图v){
//sendmail();
//pdfProgress.setVisibility(View.GONE);
/*pdfProgress.setVisibility(View.VISIBLE);
createPDF();
pdfProgress.setVisibility(View.GONE);
viewPDF()*/
/*MyAsyncTask myTask=新建MyAsyncTask();
myTask.execute();
*/
showProgress();
}
});
TextView titolo3=(TextView)rootView.findViewById(R.id.result);
TextView titolo2=(TextView)rootView.findViewById(R.id.result2);
TextView titolo4=(TextView)rootView.findViewById(R.id.resultpizze);
pdfProgress=(ProgressBar)rootView.findviewbyd(R.id.ProgressBar);
pdfProgress.setVisibility(View.GONE);
//pdfProgress.setVisibility(视图.不可见);
//TextView titolo=(TextView)rootView.findViewById(R.id.quantitá3);
/*类MyAsyncTask扩展了AsyncTask{
@凌驾
受保护的Void doInBackground(Void…参数){
//这在新线程中运行!!!
//始终在另一个线程中运行长操作,这样GUI就永远不会被阻塞
createPDF();
返回null;
}
@凌驾
受保护的void onPostExecute(void v){
//这将在作业完成后在主线程中运行。
//您必须始终从主线程更新gui
pdfProgress.setVisibility(View.GONE);
viewPDF();
}
}
*/
Bundle bundle2=getArguments();
如果(bundle2!=null){
string=bundle2.getString(“scelta2”);
titolo3.setText(字符串);
}
/*Bundle bundle2=getArguments();
如果(bundle2!=null){
//myInt=bundle2.getString(“scelta2”,myInt);
cacca=bundle2.getString(“结果”,null);
//cacca=myInt;
//日志d(“再见”,cacca);
titolo3.setText(cacca);
}*/
//titolo3.setText(myInt);
/*Bundle bundle3=getArguments();
如果(bundle3!=null){
//字符串myInt3=bundle3.getString(“TotaleBire”,null);
//cazzo2=Integer.parseInt(myInt3);
int cazzo2=bundle3.getInt(“总息税”);
titolo2.setText(String.valueOf(cazzo2));
}
Bundle=getArguments();
if(bundle!=null){
//字符串myInt2=bundle2.getString(“totalepizze”,null);
//cazzo=Integer.parseInt(myInt2);
//titolo2.setText(myInt2);
String String=bundle.getString(“scelta3”,null);
titolo4.setText(字符串);
}
*/
返回rootView;
}
/*public void sendmail(){
意向意向=新意向(意向.行动\发送);
setData(Uri.parse(“mailto:”);
字符串[]到={“marco”_marcoletto@hotmail.it"};
intent.putExtra(intent.EXTRA_电子邮件,收件人);
意向。额外(意向。额外(主题“ciao”);
intent.putExtra(intent.EXTRA_TEXT,“zao”);
intent.setType(“message/rfc822”);
chooser=intent.createChooser(intent,“manda email”);
星触觉(选择器);
}*/
//@TargetApi(Build.VERSION\u CODES.M)
public void createPDF(){
单据单据=新单据();
试一试{
String path=Environment.getExternalStorageDirectory()
.getAbsolutePath()+“/droidText”;
文件目录=新文件(路径);
如果(!dir.exists())
dir.mkdirs();
Log.d(“PDFCreator”,“PDF路径:“+Path”);
//File File=新文件(dir,“sample.pdf”);
文件=新文件(dir,“salve.pdf”);
FileOutputStream fOut=新的FileOutputStream(文件);
getInstance(doc,fOut);
//打开文档
doc.open();
ByteArrayOutputStream=新建ByteArrayOutputStream();
位图位图=BitmapFactory.decodeResource(getContext())
.getResources(),R.drawable.androtuto);
压缩(bitmap.CompressFormat.JPEG,100,流);
Image myImg=Image.getInstance(stream.toByteArray());
myImg.setAlignment(图中);
//将图像添加到文档
新增文件(myImg);
段落p1=新段落(字符串);
Font paraFont=新字体(Font.COURIER);
p1.设置对准(段落对准中心);
p1.setFont(paraFont);
//在文件中添加段落
文件添加(p1);
p2段=新段(“安卓图图”);
Font paraFont2=新字体(Font.COURIER,14.0f,Color.GREEN);
p2.设置对齐(段落对齐中心);
p2.设置字体(paraFont2);
新增文件(p2);
stream=newbytearrayoutputstream();
位图=BitmapFactory.decodeResource(getContext())
private ProgressDialog processingDialog;
mButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
processingDialog = ProgressDialog.show(this, "Creating PDF", "Please wait ...", true, false);
createPDF();
processingDialog.dismiss();
viewPDF();
}
});
private class MakePDF extends AsyncTask<Void, Void, Void> {
private ProgressDialog processingDialog;
Context cnt = null;
MakePDF(Context cnt)
{
this.cnt = cnt;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
processingDialog = ProgressDialog.show( this.cnt, "Creating PDF", "Please wait ...", true, false);
}
@Override
protected Void doInBackground(Void... arg0) {
createPDF();
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
processingDialog.dismiss();
viewPDF();
}
}
new MakePDF(ActivityName.this).execute(); //here in constructor pass context of an calling activity.