Develop Reference

Semi transparent Instruction activity in android

I want to display instruction activity when user opens the app for the first time. I am using shared preference for that. Whatever I am doing so far is working. But I think my way of achieving this is not right.
What I am following:
I am drawing a transparent instruction image(with instructions) in photoshop.
Checking if user is opening that page for the first time(using shared preference).
Displaying that particular image in an activity with translucent theme
private void showFrontPageGuideIfFirstTime(){
if(!prefKeeper.getBoolean(PreferenceKey.FRONT_GUIDE)){
Intent intent = new Intent(this, ShowGuide.class);
intent.putExtra(BACKGROUND_KEY, R.drawable.front_page_png);
this.startActivity(intent);
prefKeeper.putBoolean(PreferenceKey.FRONT_GUIDE, true);
}
}
And my instruction page looks something like(made in photoshop):
The Instruction Image
But I think by this way it would not work in all smart phone screens.
Where am I wrong, and what would be the best way of doing this?

Implementation as below
layout.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
android:id="#+id/framelayout"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="in.excogitation.example_mvptdd.MainActivity">
<!-- Include your layout here-->
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello World!"/>
</FrameLayout>
In your activity.java
public class MainActivity extends AppCompatActivity {
FrameLayout frameLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Parent FrameLayout
frameLayout = (FrameLayout) findViewById(R.id.framelayout);
// Dynamically create a relativelayout which will be appended to framelayout
final RelativeLayout relativeLayout = new RelativeLayout(getApplicationContext());
relativeLayout.setLayoutParams(new RelativeLayout.LayoutParams(ViewGroup.LayoutParams
.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
relativeLayout.setBackgroundColor(Color.DKGRAY);
relativeLayout.setAlpha(0.7f);
relativeLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// remove the whole relativelayout on click
frameLayout.removeView(relativeLayout);
}
});
RelativeLayout.LayoutParams params;
// Place 1st 30x40 ImageView at (50,60) coordinates
params = new RelativeLayout.LayoutParams(100, 100);
params.leftMargin = 20;
params.topMargin = 50;
final ImageView imageView1 = new ImageView(getApplicationContext());
imageView1.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_star));
// Add 1st imageview to relative layout
relativeLayout.addView(imageView1, params);
// Place 2nd 30x40 ImageView at (100,60) coordinates
params = new RelativeLayout.LayoutParams(120, 120);
params.leftMargin = 800;
params.topMargin = 450;
final ImageView imageView2 = new ImageView(getApplicationContext());
imageView2.setImageDrawable(getResources().getDrawable(R.drawable.ic_action_star));
// Add 2nd imageview to relative layout
relativeLayout.addView(imageView2, params);
// finally add it ot the framelayout
frameLayout.addView(relativeLayout);
}
}
Ofcourse you should modify this code with your own images and colors and interactions. Its just a simple working version that is better than loading a whole image upfront when you all you want is smaller helper images on a translucent background for the instructions.
Also you in this way you make things more Android-ish and editable. You can add more children to the relative layout like a textview to include instructions.
Screenshot on load of app and hence the relative layout as an overlay.
Screenshot on click/touch , the relative layout is removed.

Parse RelativeLayout, Set Content, And Add It To A LinearLayout

Ok... here's my situation.
I have a carousel of images in a HorizontalScrollView - which contains a LinearLayout - in my Activity, like so:
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/slider"
android:scrollbars="none" >
<LinearLayout
android:id="#+id/carousel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
/>
</HorizontalScrollView>
I have a TypedArray, loop through it, and on each run, set these images programatically, add a ClickListener and a Tag, and add this ImageView to the LinearLayout (set in my Activity Layout), like so:
// Get the array
final TypedArray carouselArray = getResources().obtainTypedArray(R.array.carousel_array);
// Populate the Carousel with item
for (int i = 0 ; i < carouselArray.length() ; ++i) {
// Image Item
ImageView outerImage;
// Set the image view resource
if(i == 0) {
outerImage.setImageResource(R.drawable.toy_filter_clear);
}
else {
outerImage.setImageResource(carouselArray.getResourceId(i, -1));
}
// Set Touch Listener
outerImage.setOnTouchListener(this);
final String prepend = "CAROUSEL_";
final String index = String.valueOf(i);
final String tag = prepend.concat(index);
outerImage.setTag(tag);
/// Add image view to the Carousel container
mCarouselContainer.addView(outerImage);
}
But now, I just found out that I have to programatically add a second image to sit inside/on top of the first image at particular coordinates (damn you UI ppl!). I need these to be considered the same image/view essentially, so need to pack them together inside of a layout, I am assuming. So I have made a layout file, like so:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/carousel_item"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="#+id/carousel_outer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="#drawable/toy_filter_normal"
/>
<ImageView
android:id="#+id/carousel_inner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/carousel_outer"
android:layout_alignRight="#+id/carousel_outer"
android:layout_marginBottom="10dp"
android:layout_marginRight="5dp"
android:src="#drawable/thumb_nofilter"
/>
</RelativeLayout>
This has the proper positioning, and the default images set on it. So what I want to be able to do is to reach into the Layout file, grab the ImageViews by their ID, overwrite the image if necessary, and then add that RelativeLayout to my LinearLayout at the end of my loop... sounds easy enough, right ?
My first attempt was to do it like this :
RelativeLayout item = (RelativeLayout) findViewById(R.id.carousel_item);
ImageView outerImage = (ImageView) item.findViewById(R.id.carousel_outer);
ImageView innerImage = (ImageView) item.findViewById(R.id.carousel_inner);
... but that gives me a NullPointer on the ImageView...So then I tried to inflate the RelativeLayout first, like this:
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.carousel_item_layout, null);
ImageView outerImage = (ImageView) view.findViewById(R.id.carousel_outer);
ImageView innerImage = (ImageView) view.findViewById(R.id.carousel_inner);
This gets rid of the NPE's, and (apparently) let's the images be set properly like so:
if(i == 0) {
outerImage.setImageResource(R.drawable.toy_filter_clear);
innerImage.setImageResource(0);
}
else {
outerImage.setImageResource(R.drawable.toy_filter_normal);
innerImage.setImageResource(carouselArray.getResourceId(i, -1));
}
but when I try to add the outerImage ImageView back to the LinearLayout, I get an NPE there:
mCarouselContainer.addView(outerImage);
More to the point, I don't want to add ONLY the one ImageView to the LinearLayout/HorizontalScrollView - I want to somehow pack the resulting images back into the RelativeLayout and add the whole thing back into my LinearLayout... but, it is worth mentioning, that this also gives me an NPE.
What is a guy to do ? Any thoughts appreciated...

Ok... Wow, thanks SO Code Monkey!
I managed to fix this with a one line fix, by adding the inflated View to the LinearLayout instead of the ImageView or the RelativeLayout (which wasn't doing anything), like so:
mCarouselContainer.addView(view);
Don't know why I hadn't tried that before, but I was unclear on whether as it's children were being updated if it would reflect the parent, so to speak... now I know it was.
I'm gonna keep the question up, as I think it's helpful... ?

How can draw frame by frame animation on image view, both visible simultaneously in Android?

I want to draw animation on image view and the image position is changing on run time if user successfully tap on the image then an animation is to be draw.Here is my code
public void enter() { //To enter in to animation
setBackgroundResource(R.anim.dhakkan_animation);
frameByframe_animation = (AnimationDrawable) getBackground();
frameByframe_animation.start();
frameByframe_animation.setOneShot(true);
}
#Override
public void exit() {
//when exit from Animation
frameByframe_animation.stop();
frameByframe_animation.setVisible(false, false);
}
the problem is that when animation darws my image of image view get invisible. According to my requirement i have to show both simultaneously in background an image(image of image view) and in foreground animation play.Plese help me im totally frustated.

If you want to show imageView, when your animation goes, just do it in *.xml:
<ImageView android:id=#+id/s210 ..... android:src="#drawable/s210 />

Android animate Translate in android 2.2

i have two image views which translates on click.
the animation works properly for one view but for second image view , my animation is not according to coordinates provided.
when i click top image view (img1) it animates properly toward bottom image view (img2) . But when i click the bottom image view, it animates from somewhere down and move towards image view 2 initial position only. though the expected behaviour is, it should animate from its position to top image view (img1) initial position.
My xml is
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:src="#drawable/letter_f"
android:layout_alignParentTop="true"
android:id="#+id/imgview1"
android:background="#drawable/chart"/>
<ImageView android:layout_height="100dp"
android:layout_width="100dp"
android:id="#+id/imgview2"
android:src="#drawable/letter_g"
android:background="#drawable/chart"
android:layout_alignParentRight="true"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
and my java class file is
public class AnimationDemo extends Activity implements OnClickListener
{
private ImageView img1;
private ImageView img2;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
img1 = (ImageView)findViewById(R.id.imgview1);
img2 = (ImageView)findViewById(R.id.imgview2);
img1.setOnClickListener(this);
img2.setOnClickListener(this);
}
#Override
public void onClick(View arg0)
{
int x1,y1; // Coordinates of first image view
int x2,y2; //Coordinates of second image view
ImageView img = (ImageView)arg0;
x1 = img1.getLeft();
y1 = img1.getTop();
x2 = img2.getLeft();
y2 = img2.getTop();
TranslateAnimation slide;
if(arg0 == img1)
{
//translate from img view 1 to img view 2
slide = new TranslateAnimation(Animation.ABSOLUTE,x1,Animation.ABSOLUTE, x2,Animation.ABSOLUTE, y1,Animation.ABSOLUTE,y2 );
}
else
{
// translate from img view 2 to img view 1
slide = new TranslateAnimation(Animation.ABSOLUTE,x2,Animation.ABSOLUTE, x1,Animation.ABSOLUTE, y2,Animation.ABSOLUTE,y1);
}
slide.setDuration(1000);
slide.setFillAfter(true);
img.startAnimation(slide);
}
}

Your troubles are due to your locations. I believe when animations are moved with absolute pixels it is relative to itself. So on your second animation you were in essence moving it from x2=220 to x1=0, and y2=419 to y1=0. So it was moving from (currentX+220, currentY+419) to (currentX +0, currentY +0) which = itself
To solve this instance simply negate and switch the values of the second slide declaration like so:
TranslateAnimation slide;
if(arg0 == img1)
{
//translate from img view 1 to img view 2
slide = new TranslateAnimation(Animation.ABSOLUTE,x1,Animation.ABSOLUTE, x2,Animation.ABSOLUTE, y1,Animation.ABSOLUTE,y2 );
}
else
{
// translate from img view 2 to img view 1
// slide = new TranslateAnimation(Animation.ABSOLUTE,x2,Animation.ABSOLUTE, x1,Animation.ABSOLUTE,y2,Animation.ABSOLUTE,y1);
slide = new TranslateAnimation(Animation.ABSOLUTE,0,Animation.ABSOLUTE, (-x2),Animation.ABSOLUTE,0,Animation.ABSOLUTE, (-y2));
}
This only happens because your top left sprite is at 0,0 though. You have to seriously rethink how you're moving your sprites around. Just remember, the TranslateAnimation moves them relative to their current positions, basically setting the sprites original location to (0,0).
Could be wrong, but hope it helps. It worked for me...
Sorry it took so long to get back to you, I lost your post and couldn't find it again for some reason. Glad you had commented earlier!

Placing one image over another image in android

I have a imageButton in android which user clicks. Then after his click I want t0 show a tick or a cross image on the toip of it.
How is it possible?
<ImageButton android:layout_width="wrap_content"
android:text="Button" android:id="#+id/button1"
android:layout_height="wrap_content" android:layout_gravity="center_horizontal"
android:background="#drawable/rhino" android:layout_marginRight="20dp"></ImageButton>

put your ImageButton and the tick image in a FrameLayout and make the visbility of the Tick image "Invisible" . So when you click on the ImageButton then change the state of Tick Image to Visible.

Get a reference to your ImageButton and then use one of its setImage methods, such as setImageResource.

You can achieve the same using ImageView. Use ImageView
testimage = (ImageView) findViewById(R.id.imageview);
testimage.setOnClickListener(listener);
write the logic to set both type of image to imageview in onclick event
public OnClickListener listener=new OnClickListener(){
#Override
public void onClick(View arg0) {
System.out.println("..set image button..");
Drawable[] layers = new Drawable[2];
layers[0] = getResources().getDrawable(R.drawable.btn_call);
layers[1] = getResources().getDrawable(R.drawable.blue_unfocus);
System.out.println(layers[1]+"...Drawable..."+layers[0]);
LayerDrawable layerDrawable = new LayerDrawable(layers);
testimage.setImageDrawable(layerDrawable);
}
};
Thanks
Deepak