Shows a Toast next to a view/button describing what it does This is basically copied over from ActionMenuItemView.onLongClick() - Android User Interface

Android examples for User Interface:View Click

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Description

Shows a Toast next to a view/button describing what it does This is basically copied over from ActionMenuItemView.onLongClick()

Demo Code


//package com.java2s;
import android.content.Context;
import android.graphics.Rect;

import android.support.annotation.NonNull;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewCompat;
import android.view.Gravity;

import android.view.View;

import android.widget.Toast;

public class Main {
    /**/*  w  w w.  ja  va 2s  . c o m*/
     * Shows a Toast next to a view/button describing what it does
     *
     * This is basically copied over from ActionMenuItemView.onLongClick()
     *
     * @param anchorView The view where the toast will appear next to
     * @param text       the text inside the Toast
     */
    public static void showToolTip(@NonNull View anchorView,
            @NonNull CharSequence text) {
        final int[] screenPos = new int[2];
        final Rect displayFrame = new Rect();
        anchorView.getLocationOnScreen(screenPos);
        anchorView.getWindowVisibleDisplayFrame(displayFrame);

        final Context context = anchorView.getContext();
        final int width = anchorView.getWidth();
        final int height = anchorView.getHeight();
        final int midy = screenPos[1] + height / 2;
        int referenceX = screenPos[0] + width / 2;
        if (ViewCompat.getLayoutDirection(anchorView) == ViewCompat.LAYOUT_DIRECTION_LTR) {
            final int screenWidth = context.getResources()
                    .getDisplayMetrics().widthPixels;
            referenceX = screenWidth - referenceX; // mirror
        }
        Toast toast = Toast.makeText(context, text, Toast.LENGTH_SHORT);
        if (midy < displayFrame.height()) {
            // Show along the top; follow action buttons
            toast.setGravity(Gravity.TOP | GravityCompat.END, referenceX,
                    screenPos[1] + height - displayFrame.top);
        } else {
            // Show along the bottom center
            toast.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0,
                    height);
        }
        toast.show();
    }

    /**
     * Similar to {@link #showToolTip(View, CharSequence)}, but takes in a string resource instead
     */
    public static void showToolTip(@NonNull View anchorView,
            int textResource) {
        showToolTip(anchorView,
                anchorView.getResources().getString(textResource));
    }

    /**
     * Similar to {@link #showToolTip(View, CharSequence)}, but displays the view's contentDescription
     */
    public static void showToolTip(@NonNull View view) {
        showToolTip(view, view.getContentDescription());
    }
}

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