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How to clear int[] array in android?


How to clear int[] array in android?

By : Rondy
Date : November 18 2020, 11:13 AM
this will help You can simply assign null to the reference. (This will work for any type of array, not just ints)
code :
int[] arr = new int[]{1, 2, 3, 4};
arr = null;
int[] arr = new int[]{1, 2, 3, 4};
arr = new int[]{6, 7, 8, 9};
float[] arr = ;// some array that you want to clear
arr = new float[arr.length];
public int incSum=0;

int[] numbersinc = new int[theAmount.length];
incSum = 0; //add this line
    for(int i=0;i<theAmount.length;i++)
    {

        numbersinc[i]=Integer.parseInt(theAmount[i]);

        incSum=incSum+numbersinc[i];
    }

    Log.e("SUM INC","Sum Inc= "+incSum);    <<<<<- This sum is multiplying
  numbersinc = null;


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How to clear result in string array Android/Java

How to clear result in string array Android/Java


By : Дмитрий Полищук
Date : March 29 2020, 07:55 AM
wish of those help After finding a word in a sentence, I want to the user to be able to clear his entries and type again a sentence in the edittext. , Extract the checking functionality to a method like this:
code :
ok.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        checkAmbiguousWord();
    }   
});  

...

private void checkAmbiguousWord(){
    final String textToCheck = text.getText().toString();
    Integer ambiguousIndex = findAmbiguousWordIndex(textToCheck);
    view.setText(ambiguousIndex != null ? meanings[ambiguousIndex] : "No ambiguous word/s found.");
}

/**
 * @param text checked for ambguous words
 * @return the index of the ambiguous word in the {@code words} array or
 * null if no ambiguous word is found
 */
private Integer findAmbiguousWordIndex(String text) {
    final String lowerCasedText = text.toLowerCase();
    for (int i = 0; i < words.length; i++) {
        if (lowerCasedText.contains(words[i].toLowerCase())) {
            return i;
        }
    }
    return null;
}
private void checkAmbiguousWord(){
    final String textToCheck = text.getText().toString();
    List<Integer> ambiguousIndexes = findAmbiguousWordIndexes(textToCheck);
    view.setText(!ambiguousIndexes.isEmpty() ? ambigousIndexesToMessage(ambiguousIndexes) : "No ambiguous word/s found.");
}

    public String ambigousIndexesToMessage(List<Integer> ambiguousIndexes) {
        // create the text using the indexes
        // this is an example implementation
        return ambiguousIndexes.toString(); // creates a list of "1","2",...
    }

/**
 * @param text checked for ambguous words
 * @return the list of indexes of the the ambiguous words in the {@code words} array          
 */
private List<Integer> findAmbiguousWordIndexes(String text) {
    final String lowerCasedText = text.toLowerCase();
    final List<Integer> ambiguousWordIndexList = new ArrayList<Integer>();
    for (int i = 0; i < words.length; i++) {
        if (lowerCasedText.contains(words[i].toLowerCase())) {
            ambiguousWordIndexList.add(i);
        }
    }
    return ambiguousWordIndexList;
}
Android: the best way to store and array, clear on app close

Android: the best way to store and array, clear on app close


By : user2208679
Date : March 29 2020, 07:55 AM
With these it helps A private instance of an Array or Map like object seems to be exactly what you need. Based on your question and the comments above, I see no reason to involve non-volatile storage or fancy Map objects.
Borrowing a bit from the android developer docs, and assuming you are implementing an Activity in your app, your code could look something like this:
code :
...

import java.util.HashMap;
import java.util.Map;

....

public class ExampleActivity extends Activity {

    public static final String TAG = "ExampleActivity";

    // create an enum to hold your key values (plain old strings could work too)
    private enum ApiKey {
        NAME, MAC, UPDATED
    };

    //declare your data structure
    private Map<ApiKey, String> myCachedApiData;   

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // The activity is being created.

        // initialize your data in onCreate()
        myCachedApiData = new HashMap<ApiKey, String>();

        // retrieve initial data from your API
        // you may want to do this on another thread if it takes a while

        ...

        // put data in your map
        myCachedApiData.put( ApiKey.NAME, deviceNameStr );
        myCachedApiData.put( ApiKey.MAC, macAddressStr );
        myCachedApiData.put( ApiKey.UPDATED, updatedStr );
    }
    @Override
    protected void onStart() {
        super.onStart();
        // The activity is about to become visible, lets
        // print out (access) some of our cached API data
        // each time the user views our Activity

        Log.d( TAG, "MAC addr is: " + myCachedApiData.get( ApiKey.MAC ) );

    }
    @Override
    protected void onResume() {
        super.onResume();
        // The activity has become visible (it is now "resumed").
    }
    @Override
    protected void onPause() {
        super.onPause();
        // Another activity is taking focus (this activity is about to be "paused").
    }
    @Override
    protected void onStop() {
        super.onStop();
        // The activity is no longer visible (it is now "stopped")
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        // The activity is about to be destroyed.

        // No need to explicitly clear our map, it will be removed when our
        // Activity is destroyed

        // myCachedApiData.clear();
    }
}
Clear previous activity array when backpressed, android

Clear previous activity array when backpressed, android


By : George Vilarinho
Date : March 29 2020, 07:55 AM
To fix this issue In my android app, i have three activities. The first activity takes the user input and passes the value of a long through Intent extras to second activity, on the basis of which the second activity shows content. Then this second activity takes some user inputs and passes a long array to third activity though Intent , on the basis of which it shows the content. Now when i backpress from third activity to second activity, i want the user inputs of second activity to be cleared that were store in long array, but my string value which second activity gets from first activity to be remained as it is. Can anyone guide me , how to achieve this. , For opening a new instance of activity, you can try this:
code :
Intent intent = new Intent(ActivityC.this, ActivityB.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);  //this combination of flags would start a new instance even if the instance of same Activity exists.
intent.addFlags(Intent.FLAG_ACTIVITY_TASK_ON_HOME);
finish();
startActivity(intent);
myArray = new String[]; //reinitialize all data structure
myArrayList= new ArrayList<String>();
sens_checked_ids = new long[];
this.setState is not clear out array on first attempt of onClick event and have to do it twice to clear out array

this.setState is not clear out array on first attempt of onClick event and have to do it twice to clear out array


By : Dorian Appeldoorn
Date : March 29 2020, 07:55 AM
wish of those help Working on a document upload section of a component. User can drop their file to upload and below the drop area is a submit, cancel button, and the list of files they are going to submit. The cancel button should clear the files array. , setState can run asynchronously.
Try changing your handler to:
code :
handleClick(event) {
    this.setState({
        files: []
    }, () => console.log(this.state.files));
}
Clear user data or Clear cache on Phonegap android

Clear user data or Clear cache on Phonegap android


By : mlgx
Date : March 29 2020, 07:55 AM
hope this fix your issue Add below code in your oncreate() method of activity file after loading index.html :
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