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我想顯示一個alertdialog並從用戶那裏獲得一些輸入，然後在輸入asynctask中處理輸入，但alertdialog在輸入和asynctask開始執行之前變爲解除。如何在asynctask開始之前顯示alertdialog
我該怎麼辦？請幫幫我。這是我的代碼;
private String[] newspapers,newspapersUrl,newspapersPath;
private String[] choosed,choosedUrl,choosedPath;
private boolean[] checked;
private int perNewspaper;
private boolean returned = false;
private AlertDialog.Builder builder;
private FetchingNewsByChoice fetchingNewsByChoice;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
returned = AlertDialogCreation();
if(returned)
{
fetchingNewsByChoice = new FetchingNewsByChoice((AppCompatActivity)MainActivity.this,choosed,choosedPath,perNewspaper);
fetchingNewsByChoice.execute();
}
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
//***** Alert Dialog *****//
public boolean AlertDialogCreation()
{
//***** File Control And Creating An Dialog Interface if this is first usage *****//
File file = getApplicationContext().getFileStreamPath("First.txt");
if(!file.exists())
{
writeToFile("First.txt", "0",true);
}
if(readFromFile("First.txt",false)[0].equals("0"))
{
newspapers = readFromFile("Choicable Newspaper.txt",true);
newspapersUrl = readFromFile("Choicable Url.txt",true);
newspapersPath = readFromFile("Choicable Path.txt",true);
checked = new boolean[newspapers.length];
builder = new AlertDialog.Builder(this,R.style.AppCompatAlertDialogStyle);
builder.setTitle("Lütfen Güncel Haberlerini Takip Etmek İstediğiniz Siteleri Seçiniz..");
builder.setItems(newspapers, null);
builder.setPositiveButton("Tamam", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
int count = 0;
for (int a = 0; a < newspapers.length; a++) {
if (checked[a]) {
count++;
writeToFile("Choosed.txt", newspapers[a], false);
writeToFile("ChoosedUrl.txt", newspapersUrl[a], false);
writeToFile("ChoosedPath.txt", newspapersPath[a], false);
}
if (a == (newspapers.length - 1) && count == 0) {
Toast.makeText(getApplicationContext(), "En az bir gazete seçmek zorundasınız..", Toast.LENGTH_LONG).show();
builder.show();
}
}
}
});
builder.setMultiChoiceItems(newspapers, checked, new DialogInterface.OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i, boolean isChecked) {
if (isChecked) {
checked[i] = true;
} else {
checked[i] = false;
}
}
});
try
{
builder.show();
}
catch (Exception ex)
{
ex.printStackTrace();
}
writeToFile("First.txt", "1", true);
choosed = readFromFile("Choosed.txt",false);
choosedUrl = readFromFile("ChoosedUrl.txt",false);
choosedPath = readFromFile("ChoosedPath.txt",false);
if(choosed != null)
{
perNewspaper = (int) Math.ceil(newspapers.length/choosed.length);
if(perNewspaper > 15)
{
perNewspaper = 14;
}
}
return true;
}
else if(readFromFile("First.txt",false)[0].equals("1"))
{
newspapers = readFromFile("Choicable Newspaper.txt",true);
newspapersUrl = readFromFile("Choicable Url.txt",true);
newspapersPath = readFromFile("Choicable Path.txt",true);
choosed = readFromFile("Choosed.txt",false);
choosedUrl = readFromFile("ChoosedUrl.txt",false);
choosedPath = readFromFile("ChoosedPath.txt",false);
perNewspaper = (int) Math.ceil(newspapers.length/choosed.length);
if(perNewspaper > 15)
{
perNewspaper = 14;
}
return true;
}
else
{
return false;
}
//***** File Control And Creating An Dialog Interface if this is first usage *****//
}
//*****Files*****//
private void writeToFile(String fileName,String data,boolean isPrivate)
{
try
{
OutputStreamWriter outputStreamWriter;
if(isPrivate)
{
outputStreamWriter = new OutputStreamWriter(getApplicationContext().openFileOutput(fileName, MODE_PRIVATE));
}
else
{
outputStreamWriter = new OutputStreamWriter(getApplicationContext().openFileOutput(fileName, MODE_APPEND));
}
outputStreamWriter.write(data+"\r\n");
outputStreamWriter.close();
}
catch (IOException e)
{
}
}
public String[] readFromFile(String fileName,boolean isAsset)
{
String[] ret=null;
try
{
InputStream inputStream;
if(isAsset)
{
inputStream = getApplicationContext().getAssets().open(fileName);
}
else
{
inputStream = getApplicationContext().openFileInput(fileName);
}
if (inputStream != null)
{
InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
String receiveString;
StringBuilder stringBuilder = new StringBuilder();
while ((receiveString = bufferedReader.readLine()) != null) {
stringBuilder.append(receiveString).append(",");
}
inputStream.close();
ret = stringBuilder.toString().split(",");
inputStream.close();
}
}
catch (FileNotFoundException e)
{
}
catch (IOException e)
{
}
return ret;
}
你能告訴我們一些你的代碼嗎？你應該調用你的alertdialog並且在調用你的asynctask之前影響值，以防你在asynctask中調用alertdialog。 – theyouishere