Question

我想显示一个alertdialog并从用户那里得到一些输入，之后，在asynctask中处理输入但alertdialog在获得输入和asynctask开始执行之前被解除。

我该怎么办？请帮我。这是我的代码;

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;
}

Answer 1

我想你有一个setpositivebutton点击监听器。使用所需的输入在该侦听器中启动asynktask。

Answer 2

首先用参数编写自己的函数。
在该函数中调用异步任务。
现在，在完成对话框的dimiss后，通过将表单值作为参数传递给该函数来调用该函数。

如何在asynctask start

2 个答案: