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POHow to Hide and Show Buttons on Alternate Touch Events
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  1. POHow to Hide and Show Buttons on Alternate Touch Events
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    copied!<p>My activity displays images and i want to display two buttons when the user touch the screen, and to disappear these button on next touch.</p> <p>My activity file ImageViewPager.java is as follows:</p> <pre><code>package com.pankajvatsa.testfeet; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.RelativeLayout; public class ImageViewPager extends Activity { // Declare Variable int position; Button bWallpaperButton; Button bDownloadButton; RelativeLayout mainLay; int flagForButton = 0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Set title for the ViewPager setTitle("ViewPager"); // Get the view from view_pager.xml setContentView(R.layout.activity_image_view_pager); mainLay = (RelativeLayout) findViewById(R.id.rl_view_pager); mainLay.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { // TODO Auto-generated method stub if (event.getAction() == MotionEvent.ACTION_DOWN) { bWallpaperButton.setVisibility(View.VISIBLE); bDownloadButton.setVisibility(View.VISIBLE); return true; } if (event.getAction() == MotionEvent.ACTION_UP) { bWallpaperButton.setVisibility(View.INVISIBLE); bDownloadButton.setVisibility(View.INVISIBLE); return true; } return true; } }); bWallpaperButton = (Button) findViewById(R.id.bSetWallpaper); bDownloadButton = (Button) findViewById(R.id.bSaveToGallery); // Retrieve data from MainActivity on item click event Intent p = getIntent(); position = p.getExtras().getInt("id"); ImageAdapter imageAdapter = new ImageAdapter(this); List&lt;ImageView&gt; images = new ArrayList&lt;ImageView&gt;(); // Retrieve all the images for (int i = 0; i &lt; imageAdapter.getCount(); i++) { ImageView imageView = new ImageView(this); imageView.setImageResource(imageAdapter.mThumbIds[i]); imageView.setScaleType(ImageView.ScaleType.CENTER); images.add(imageView); } // Set the images into ViewPager ImagePagerAdapter pageradapter = new ImagePagerAdapter(images); ViewPager viewpager = (ViewPager) findViewById(R.id.image_pager); viewpager.setAdapter(pageradapter); // Show images following the position viewpager.setCurrentItem(position); } } </code></pre> <p>And my xml file is as follows:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/rl_view_pager" android:layout_width="match_parent" android:layout_height="match_parent" android:clickable="true" android:focusable="true" android:focusableInTouchMode="true" &gt; &lt;android.support.v4.view.ViewPager android:id="@+id/image_pager" android:layout_width="wrap_content" android:layout_height="wrap_content" android:clickable="true" android:focusable="true" android:focusableInTouchMode="true" &gt; &lt;/android.support.v4.view.ViewPager&gt; &lt;Button android:id="@+id/bSetWallpaper" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:text="@string/set_wallpaper" android:visibility="gone" /&gt; &lt;Button android:id="@+id/bSaveToGallery" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:text="@string/save_local" android:visibility="gone" /&gt; &lt;/RelativeLayout&gt; </code></pre>
 

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