Question 305663 in Android Studio Question posted in
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Android Studio – The AsyncTask deprecated and i dont understand how to use Executors

I tried to use AsyncTask but is deprecated and i dont understand how to use Executors can someone help me how can use it with just small example
my code below

    public void onClick(View view) {
         String obj = this.txtone.getText().toString();
         String obj2 = this.txttwo.getText().toString();
         String obj3 = this.txttime.getText().toString();


        Double value2 = Double.valueOf(obj); 
        Double value3 = Double.valueOf(obj2);
        Double value4 = Double.valueOf(obj3); 

        Double valueOf = value4;

        this.table.removeAllViews();
        NumberFormat instance = NumberFormat.getInstance(Locale.US);
        String[] strArr = {"Times " , "number 1","number 1" ,"Sum"};
        addTableRowHeader(strArr[0], strArr[1], strArr[2], strArr[3]);
        String str = "";
        int i = 0;
        while (((double) i) < valueOf.doubleValue()) {
            double sum = value2 + value3;
            StringBuilder stringBuilder;
            stringBuilder = new StringBuilder(str);
            i++;
            stringBuilder.append(i);
            addTableRow(stringBuilder.toString(), instance.format(value2), instance.format(value3), instance.format(sum));
            valueOf2 = sum;
}
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2

Answers


  1. 0

    You can use Executors:

    For Multi Threading :

    private static final int CPU_COUNT = 
Runtime.getRuntime().availableProcessors();
private static final int MAXIMUM_POOL_SIZE = CPU_COUNT * 2 + 1;
private final ExecutorService service = 
Executors.newFixedThreadPool(MAXIMUM_POOL_SIZE);

    For Single Thread :

    private final ExecutorService  service = 
Executors.newSingleThreadExecutor();

    Now simply execute your work using execute() function like this :

     service.execute(new Runnable{

 // Fetch user data here or do whatever you want to do on 
  background thread.
// This is same as doInBackground method of AsyncTask which 
 executes on the 
   background thread.

runOnUiThread(new Runnable{

//This Section will Execute on Main thread.
// Use this if you want to access any UI element.
});


});

    Just remember to shutdown the Executor when you are finished like this :

    service.shutdown();
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  2. 0

    This can also be used

    public void onClick(View view) {
String obj = this.txtone.getText().toString();
String obj2 = this.txttwo.getText().toString();
String obj3 = this.txttime.getText().toString();

final Double value2 = Double.valueOf(obj);
final Double value3 = Double.valueOf(obj2);
final Double value4 = Double.valueOf(obj3);

final Double valueOf = value4;

this.table.removeAllViews();
final NumberFormat instance = NumberFormat.getInstance(Locale.US);
final String[] strArr = {"Times ", "number 1", "number 1", "Sum"};
addTableRowHeader(strArr[0], strArr[1], strArr[2], strArr[3]);

ExecutorService executorService = Executors.newSingleThreadExecutor();

for (int i = 0; i < valueOf; i++) {
    final int index = i;
    executorService.submit(() -> {
        double sum = value2 + value3;
        runOnUiThread(() -> {
            addTableRow(String.valueOf(index + 1), instance.format(value2), instance.format(value3), instance.format(sum));
        });
    });
}


  executorService.shutdown();
}
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