我正在尝试在警报对话框中更新消息。我希望对话框显示更新的图表完成百分比。
请稍候...... 图表正在加载......
我想出了如何获得每次循环迭代的百分比，我很难将对话框更新为正确的百分比。在此先感谢!!!!
//我的xml textview对象
<TextView
android:id="@+id/percentloaded"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="The graphs are loading...\n0% Completed"
android:layout_gravity="right"
android:visibility="invisible"
android:textColor="#FFFFFF" />
//我如何在创建函数中调用异步
new MyAsync().execute();
//我的onCreate（）
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_network_showcharts);
setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
// fun little snippet that prevents users from taking screenshots
// on ICS+ devices :-)
getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
WindowManager.LayoutParams.FLAG_SECURE);
//Toast.makeText(NetworkAllInformation_ShowChart.this, "Please wait for graphs to finish loading", Toast.LENGTH_SHORT).show();
progressDialog = new ProgressDialog(NetworkAllInformation_ShowChart.this);
cycleDate = (TextView) findViewById(R.id.CycleDateAnswer);
cycleDay = (TextView) findViewById(R.id.CycleDayAnswer);
cycleDailyUsage = (TextView) findViewById(R.id.CycleUsageAnswer);
cycleOverallUsage = (TextView) findViewById(R.id.TotalUsageAnswer);
percentLoaded = (TextView) findViewById(R.id.percentloaded);
stringofZero = "0";
plot = (XYPlot) findViewById(R.id.mySimpleXYPlot);
alertDialogBuilder = new AlertDialog.Builder(this);
final Calendar calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
currentDate = (month+1) +"-" +day+ "-"+ year;
theNumberOfDaysToCompare = day;
intObj = new Integer(theNumberOfDaysToCompare);
intNumberOfMaxGBsAccepted = 0;
numObj = (Number)intObj;
series1Numbers = new Number[(Integer) numObj];
series2Numbers = new Number[(Integer) numObj];
series3Numbers = new Number[(Integer) numObj];
handler = new Handler();
ParseQuery<ParseObject> query0 = ParseQuery.getQuery("ClientCompanyInfo");
query0.whereEqualTo("SiteID", ShowSatellitesActivity.IDchosen);
query0.addAscendingOrder("SiteID");
query0.setLimit(1000);
query0.selectKeys(Arrays.asList("UsagePlan"));
List<ParseObject> results0 = null;
try {
results0 = query0.find();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
System.out.println("query0 size: "+results0.size());
for (ParseObject data : results0) {
// This does not require a network access.
Integer.parseInt(data.getString("UsagePlan"));
System.out.println("the usage plan is: "+Integer.parseInt(data.getString("UsagePlan")) );
if(Integer.parseInt(data.getString("UsagePlan")) >=1 )
{
System.out.println("The usage plan is a set number");
intNumberOfMaxGBsAccepted = Integer.parseInt(data.getString("UsagePlan"));
} //ends if
}//ends for loop
new MyAsync().execute();
sum = 0;
} //ends on create
//我的异步任务
private static class MyAsync extends AsyncTask <Void, Integer, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// set title
alertDialogBuilder.setTitle("Please wait...");
alertDialogBuilder.setCancelable(false);
// set dialog message
alertDialogBuilder.setMessage(percentLoaded.getText());
// create alert dialog
alertDialog = alertDialogBuilder.create();
// show it
alertDialog.show();
}
protected static void onProgressUpdate(Integer progress) {
alertDialog.setMessage("The graphs are loading...\n"+progress[0]+"% Completed");
alertDialog.dismiss();
System.out.println("onProgressUpdate: "+progress[0]);
}
protected void onPostExecute(String result) {
System.out.println("onPostExecute: "+result);
alertDialog.setMessage("The graphs are loading...\n"+result+"% Completed");
}
@Override
protected String doInBackground(Void... params) {
// TODO Auto-generated method stub
incrementor = 0;
for ( int i = 0; i<day; i++){
//get information about the user
ParseQuery<ParseObject> query = ParseQuery.getQuery("UsageCalculator");
query.whereEqualTo("SiteID", ShowSatellitesActivity.IDchosen);
query.addAscendingOrder("SiteID");
query.setLimit(1000);
query.getFirstInBackground(new GetCallback<ParseObject>() {
public void done(ParseObject dailyUsage, ParseException e) {
if (e == null) {
dayString = (1+incrementor);
System.out.println("Day number: "+Integer.toString(dayString));
getThePercent = Integer.toString((int) ((100 / (float) day) * dayString));
System.out.println(getThePercent);
Integer percentInt = Integer.valueOf((100 /day) * dayString);
try{
publishProgress(percentInt);
Thread.sleep(1000);
} catch(Exception e1){
e1.printStackTrace();
}
//start
ParseQuery<ParseObject> query2 = ParseQuery.getQuery("UsageCalculator");
query2.whereEqualTo("monthString", String.valueOf(month+1)); //current month
query2.whereEqualTo("SiteID", dailyUsage.getString("SiteID")); //the selected ID
query2.whereEqualTo("yearString", String.valueOf(year)); //current year
query2.whereEqualTo("dayString", Integer.toString(dayString)); //incremented through to have every day
query2.addAscendingOrder("SiteID");
query2.setLimit(1000);
query2.selectKeys(Arrays.asList("dataUsedString", "usageDate")); //take the information out of the date and usage columns
List<ParseObject> results = null;
try {
results = query2.find();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
System.out.println("query8 size: "+results.size());
for (ParseObject data : results) {
// This does not require a network access.
myArray.add(data.getString("dataUsedString"));
}
//the last day reached
if(myArray.size() == day-1){
alertDialog.dismiss();
plot.clear(); //erase the old plot
updateGraphValues(); //get values of graph
updateGraphBackground(); //set the values to the graph
plot.redraw(); //redraw the plot with the correct values
}
incrementor++;
} //if the exception handler is null
else {
Log.d("showChart", "Error: " + e.getMessage()); //if their is an exception
}
} //ends the done
}); //ends the query
} //ends the for loop
return "";
}
}
//其他函数调用
private static void updateGraphValues() {
for (int i = 0; i<myArray.size(); i++){
usageValue = Double.parseDouble(myArray.get(i));
//daily usage array
series2Numbers[i] = usageValue;
//total usage sumation array
series1Numbers[i] = (usageValue+increasingSum);
//the max value
series3Numbers[i] = intNumberOfMaxGBsAccepted;
vector.add((double) i);
vector.add(Math.sin(i));
//keeping a running sum
if(usageValue!=0) { increasingSum= increasingSum+usageValue; }
}
increasingSum = 0;
} // ends updating the graph value function
private static void updateGraphBackground() {
// Turn the above arrays into XYSeries':
series1 = new SimpleXYSeries(
Arrays.asList(series1Numbers), // SimpleXYSeries takes a List so turn our array into a List
SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, // Y_VALS_ONLY means use the element index as the x value
"Total"); // Set the display title of the series
// same as above
series2 = new SimpleXYSeries(Arrays.asList(series2Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Daily");
series3 = new SimpleXYSeries(Arrays.asList(series3Numbers), SimpleXYSeries.ArrayFormat.Y_VALS_ONLY, "Max");
series1Format = new LineAndPointFormatter(Color.rgb(51, 51, 255), 0, Color.rgb(51, 153, 255), null);
series1Format.getFillPaint().setStrokeJoin(Paint.Join.ROUND);
series1Format.getFillPaint().setStrokeCap(Paint.Cap.ROUND);
series1Format.getFillPaint().setPathEffect(new CornerPathEffect(10) );
series1Format.getFillPaint().setAntiAlias(true);
series1Format.getFillPaint().setStrokeWidth(8);
// same as above:
//daily green
series2Format = new LineAndPointFormatter(Color.rgb(51, 255, 153), 0, Color.rgb(153, 255, 204), null);
series2Format.getFillPaint().setStrokeJoin(Paint.Join.ROUND);
series2Format.getFillPaint().setStrokeCap(Paint.Cap.ROUND);
series2Format.getFillPaint().setPathEffect(new CornerPathEffect(10) );
series2Format.getFillPaint().setAntiAlias(true);
series2Format.getFillPaint().setStrokeWidth(8);
series3Format = new LineAndPointFormatter(Color.rgb(255, 51, 51), 0, 0, null);
series3Format.getFillPaint().setStrokeJoin(Paint.Join.ROUND);
series3Format.getFillPaint().setStrokeCap(Paint.Cap.ROUND);
series3Format.getFillPaint().setPathEffect(new CornerPathEffect(10) );
series3Format.getFillPaint().setAntiAlias(true);
series3Format.getFillPaint().setStrokeWidth(8);
// add a new series' to the xyplot:
plot.addSeries(series1, series1Format); //this one has to be first to that the domain and range can be found for this series
plot.addSeries(series2, series2Format);
plot.addSeries(series3, series3Format);
// reduce the number of range labels
plot.setTicksPerRangeLabel(1);
plot.getGraphWidget().setDomainLabelOrientation(45);
plot.calculateMinMaxVals();
minXy=new PointF(plot.getCalculatedMinX().floatValue(),plot.getCalculatedMinY().floatValue());
maxXY=new PointF(plot.getCalculatedMaxX().floatValue(),plot.getCalculatedMaxY().floatValue());
// plot.setClickable(true);
//NOTE about XYPlotZoomPan: when an OnTouchListener is set, zooming is disabled. Subclass to avoid it.
plot.setOnTouchListener(new View.OnTouchListener(){
public boolean onTouch(View v, MotionEvent me) {
//the begin of finding a point touched, then drawing two lines, and labeling the lines
touchX = me.getX();
touchY = me.getY();
widget = plot.getGraphWidget();
gridRect = widget.getGridRect();
if(gridRect.contains(touchX, touchY)){ //Check the touch event is in the grid
XYSeries xyData = plot.getSeriesSet().iterator().next();
long targetValX = Math.round(widget.getXVal(touchX));
System.out.println("Touched at " + touchX + ", " + touchY + ". Target val X: " + targetValX);
if(plot.getSeriesSet().size() > 1){
System.out.println("More than one series in plot. Using only the first one");
}
for(int i = 0; i < xyData.size(); ++i){
long currValX = xyData.getX(i).longValue();
long currValY = xyData.getY(i).longValue();
//Calculate the range value of the closest domain value (assumes xyData is sorted in ascending X order)
if(currValX >= targetValX){
long currDiff = currValX - targetValX;
if(prevValX != null && (targetValX - prevValX) < currDiff){
targetValY = xyData.getY(i-1).longValue();
}else{
targetValY = currValY;
}
break;
}
prevValX = currValX;
}
if(targetValY != null){
long maxValY = plot.getCalculatedMaxY().longValue();
long minValY = plot.getCalculatedMinY().longValue();
System.out.println("Target Y Value"+targetValY);
float pixelPosY = gridRect.top + ValPixConverter.valToPix((double)targetValY, (double)minValY, (double)maxValY, (float)gridRect.height(), true);
System.out.println("Pixel Pos Y: "+pixelPosY);
Number numberForDaily = series2Numbers[ (int)targetValX];
widget.setDomainCursorPosition(touchX);
System.out.println("Touch X: "+touchX);
plot.getGraphWidget().setSize(new SizeMetrics(
0, SizeLayoutType.FILL,
0, SizeLayoutType.FILL)
);
Paint paintForText = new Paint();
paintForText.setColor(Color.BLACK);
Paint paintForTextBackroud = new Paint();
paintForTextBackroud.setColor(Color.WHITE);
widget.setCursorLabelPaint(paintForText);
widget.setCursorLabelBackgroundPaint(paintForTextBackroud);
widget.getDomainLabelPaint().setTextSize(20);
widget.getRangeLabelPaint().setTextSize(20);
widget.getCursorLabelPaint().setTextSize(25);
System.out.println("Cursor is at = "+ targetValX + " " + targetValY);
getTheStartDate();
Calendar cal = new GregorianCalendar(year, month + 1, day);
Integer theNumberOfTheStartDay = cal.get(GregorianCalendar.DAY_OF_YEAR);
//the offset
Integer addingTheDates = (theNumberOfTheStartDay + (int)targetValX);
//convert number to a date which is readable
GregorianCalendar gcDate = new GregorianCalendar();
gcDate.set(GregorianCalendar.DAY_OF_YEAR, addingTheDates);
//if the day of the month is less than 10
//add a zero to the front of it so that the string can be ordered
if(gcDate.get(GregorianCalendar.DAY_OF_MONTH)<10){
StringBuilder sb = new StringBuilder();
sb.append("0");
sb.append(gcDate.get(GregorianCalendar.DAY_OF_MONTH));
fixZeroInDate = sb.toString();
}else{
fixZeroInDate= String.valueOf(gcDate.get(GregorianCalendar.DAY_OF_MONTH));
}
String stringOfFinalCycleDate=
(gcDate.get((GregorianCalendar.MONTH)))+"/"+
fixZeroInDate+"/"+
gcDate.get(GregorianCalendar.YEAR);
//UPDATING THE TEXTVIEWS BASED ON BUTTON TAP
cycleDate.setText(stringOfFinalCycleDate); //cycle date
cycleDay.setText(Long.toString(targetValX)); //cycle day
cycleDailyUsage.setText( numberForDaily.toString());//usage of single cycle day
System.out.println("Start time now");
//do math to get the running total of usage
findtheUsageSum(stringOfFinalCycleDate);
DecimalFormat df = new DecimalFormat("#0.00");
cycleOverallUsage.setText(String.valueOf(df.format(usageSumOnClick))); //overall usage by the cycle day
System.out.println("How much time has passed?");
}else{
System.out.println("Couldn't find the closest range to the selected domain coordinate");
}
plot.invalidate();
}else{
System.out.println("Touched outside the plot grid");
}
return false;
}
private void findtheUsageSum(String stringOfFinalCycleDate) {
ParseQuery<ParseObject> query3 = ParseQuery.getQuery("UsageCalculator");
query3.whereEqualTo("SiteID", ShowSatellitesActivity.IDchosen);
query3.addAscendingOrder("SiteID");
query3.setLimit(10000);
query3.whereLessThanOrEqualTo("usageDate", stringOfFinalCycleDate);
query3.selectKeys(Arrays.asList("dataUsedString", "usageDate"));
List<ParseObject> results1 = null;
try {
results1 = query3.find();
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
usageSumOnClick = 0;
System.out.println("query3 size: "+results1.size());
for (ParseObject data : results1) {
// looping for all the dates and usage
System.out.println("data used: "+data.getString("dataUsedString"));
System.out.println("on date: "+data.getString("usageDate"));
usageSumOnClick = usageSumOnClick + Double.parseDouble(data.getString("dataUsedString"));
} //ends for loop
} //ends find the usage function
private void getTheStartDate() {
final Calendar calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = 1;
startDate = (month+1) +"-" +day+ "-"+ year;
}
});
}
答案 0 :(得分：1)
覆盖AsyncTask为您提供的onProgressUpdate方法，不要创建自己的方法。
另外，请勿亲自致电onProgressUpdate！这是一个回调方法，系统使用该方法为您提供UI线程的回调。如果直接调用它，代码将在后台线程中运行，您无法在其中更新UI。相反，请使用publishProgress。
编辑：为了能够将正确的值传递给publishProgress，您还需要在扩展AsyncTask时指定泛型类型（第二个泛型类型是进度的类型）。
试试这样：
private static class MyAsync extends AsyncTask <Void, Integer, String> {
....
@Override
protected void onProgressUpdate(Integer... progress) {
alertDialog.setMessage("The graphs are loading...\n"+progress[0]+"% Completed");
}
@Override
protected String doInBackground(Void... params) {
incrementor = 0;
for ( int i = 0; i<day; i++){
publishProgress(getThePercent);
....