Get text as String from EditView. - Android User Interface

Android examples for User Interface:TextView Value

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Description

Get text as String from EditView.

Demo Code


//package com.java2s;
import android.app.Activity;

import android.util.Log;

import android.view.View;

import android.widget.TextView;

public class Main {
    /**/*from w ww  . j ava 2  s  .  co m*/
     * Get text as String from EditView.
     * <b>Note:</b> returns "" for null EditText, not a NullPointerException
     *
     * @param view EditView to get text from
     * @return the text
     */
    public static String getText(TextView view) {
        String text = "";
        if (view != null) {
            text = view.getText().toString();
        } else {
            Log.e("PercolateAndroidUtils",
                    "Null view given to getText().  \"\" will be returned.");
        }
        return text;
    }

    /**
     * Get text as String from EditView.
     * <b>Note:</b> returns "" for null EditText, not a NullPointerException
     *
     * @param context The current Context or Activity that this method is called from
     * @param id      Id for the TextView/EditView to get text from
     * @return the text
     */
    public static String getText(Activity context, int id) {
        TextView view = findViewById(context, id);

        String text = "";
        if (view != null) {
            text = view.getText().toString();
        } else {
            Log.e("PercolateAndroidUtils",
                    "Null view given to getText().  \"\" will be returned.");
        }
        return text;
    }

    /**
     * Utility method to make getting a View via findViewById() more safe & simple.
     * <p/>
     * - Casts view to appropriate type based on expected return value
     * - Handles & logs invalid casts
     *
     * @param context The current Context or Activity that this method is called from
     * @param id      R.id value for view
     * @return View object, cast to appropriate type based on expected return value.
     * @throws ClassCastException if cast to the expected type breaks.
     */
    @SuppressWarnings("unchecked")
    public static <T extends View> T findViewById(Activity context, int id) {
        T view = null;
        View genericView = context.findViewById(id);
        try {
            view = (T) (genericView);
        } catch (Exception ex) {
            String message = "Can't cast view (" + id + ") to a "
                    + view.getClass() + ".  Is actually a "
                    + genericView.getClass() + ".";
            Log.e("PercolateAndroidUtils", message);
            throw new ClassCastException(message);
        }

        return view;
    }

    /**
     * Utility method to make getting a View via findViewById() more safe & simple.
     * <p/>
     * - Casts view to appropriate type based on expected return value
     * - Handles & logs invalid casts
     *
     * @param parentView Parent View containing the view we are trying to get
     * @param id         R.id value for view
     * @return View object, cast to appropriate type based on expected return value.
     * @throws ClassCastException if cast to the expected type breaks.
     */
    @SuppressWarnings("unchecked")
    public static <T extends View> T findViewById(View parentView, int id) {
        T view = null;
        View genericView = parentView.findViewById(id);
        try {
            view = (T) (genericView);
        } catch (Exception ex) {
            String message = "Can't cast view (" + id + ") to a "
                    + view.getClass() + ".  Is actually a "
                    + genericView.getClass() + ".";
            Log.e("PercolateAndroidUtils", message);
            throw new ClassCastException(message);
        }

        return view;
    }
}

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