How to set text or add text to a specific line in multiline EditText in android?

Question

I want to set text or add text to a specific line in the EditText in android? Are there any methods available?

As I know setText will overwrite the whole text and append will add text at the end, is there any specific method for what I want to do?

I know how to read and get a text from specific line, but how to make changes to that text without disturbing other lines below and above it?

Answer 1

1) get the Editable from EditText using EditText#getText();

2) do your modifications to the Editable you've get in previous step.

Editable has a method insert(int where, CharSequence text) - use it to insert where you want.

3) set it back to the EditText using EditText#setText(); (SET THE WHOLE MODIFIED Editable BACK)

If you want to know where there are end of line signs in the Editable you received then search it for the new line char aka '\\n', then use this place/places to insert somethig after the '\\n' , if you want to insert in a particular line that is alligned by EditText, then you need to get to the "alligning engine" of EditText , I dont't know the details how this works, so you need to read the sources if you want to do that.

Answer 2

You should try using this type code

EditText edt_Text= new EditText(this);
edt_Text.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
edt_Text.setText("Hi how you");
lnrImageButton.addView(edt_Text);

and set button onClick to add new character which you want

menu1.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            edt_Text.getText().insert(6, "are");
        }
    });

this code is for specific character base

now you should find line from character and insert text using this method.

i hope this will help you.

Answer 3

Most probably the multi line text will be separated by a line breaks and the below code will give you a clarification

public class EditTextExample extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_edtittext_example);

        Button button = (Button) findViewById(R.id.m_button);
        button.setOnClickListener(btnListener);
    }


    //button listener
    private OnClickListener btnListener = new OnClickListener() {

    public void onClick (View view) {

    EditText etMultiLinetext = (EditText) findViewById(R.id.etMultiLineText);
    String str = etMultiLinetext.getText().toString();

    Toast.makeText(getBaseContext(), str, Toast.LENGTH_LONG).show();

    TextView tvMultiLineText = (TextView) findViewById(R.id.tvMultiLineText);
    String[] strArr = str.split(System.getProperty("line.separator"));
    for (int i = 0; i < strArr.length; i++) {
        Log.e("String value", "String value" + strArr[i]);
    }
    tvMultiLineText.setText(str);
   }
  }; 
}

And I f you wanna add the content in edit text you can add by getting the EditText value and append the string whatever you need and you can set it back like below

etMultiLine.setText("Edited Text");