在 textview 中显示来自 edittext 的值

Question

I'm trying to make EditText programmatically inside a loop.

What I'm currently doing:

public class MainActivity extends Activity {
    int quan = 0;
    LinearLayout linear;
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        for (int  i =0; i < quan; i++)
        {
            EditText myEditText = new EditText(this);
            myEditText.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
            linear.addView(myEditText);
        }
    }
}

but I want to store the value from all EditTexts and display them in some TextView how I can get values from all EditTexts?

Answer 1

You need to call addTextChangedListener(TextWatcher watcher) on your EditText , the watcher will receive onTextChanged(CharSequence s, int start, int before, int count) on every change, and you can use the sequence to update your TextView . More information here: https://developer.android.com/reference/android/text/TextWatcher

Answer 2

There are two easy steps to achieve this:

1. Add your EditText s to some kind of List when creating them.
2. Read values inside a foreach when some event (eg button click) happens.

I used StringBuilder to reduce the number of Strings created in heap String Pool.

// 1 - Add all of your EditTexts inside some ArrayList as a member of class
private ArrayList mEditTexts = new ArrayList<EditText>();

// 2 - Add your EditTexts to @mEditTexts when you are creating them
...
...
mEditTexts.add(editText);

// 3 - In your event handler, when you need to get all values
StringBuilder stringBuilder = new StringBuilder()
for(EditText editText : mEditTexts) {
  String content = editText.getText().toString().trim();
  stringBuilder.append(content);
}

textView.setText(stringBuilder.toString());