Develop Reference

What's the easiest way to add arrow for Android Button

I need to add Arrow to Next Button like that
What's the easiest way to achieve that? Making custom Compound view sounds like overkill
PS Symbol > is not nice.

Just use a TextView.
<TextView
android:id="#+id/some_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/next"
android:drawableRight="#drawable/arrow_right"
android:clickable="true"
android:focusable="true"
android:background="?android:selectableItemBackground"
/>
TextViews have support for compound drawables, where you can specify a drawable you want to be displayed next to the text. It can be above, below, right, left, start, end.
Notice also that I set the TextView to be clickable and focusable and that I gave it Android's default ripple background (where it shows the ripple effect when pressed).
EDIT
If you need the arrow to be directly after the text, you have to use a container and child Views:
<LinearLayout
android:id="#+id/button_wrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:clickable="true"
android:focusable="true"
android:background="?android:selectableItemBackground">
<TextView
android:id="#+id/some_textview"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="#string/next" />
<ImageView
android:id="#+id/some_image"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="#drawable/arrow_right" />
</LinearLayout>
You'll want to set your click listener on the LinearLayout.
Alternatively, use the U+276fa character as part of your TextView's text: ❯. It's not > and looks more like an arrow.

Try this custom button, it calculates where to put the icon directly next to the text.
public class CenteredIconButton extends Button {
private static final int LEFT = 0, TOP = 1, RIGHT = 2, BOTTOM = 3;
private Rect textBounds = new Rect();
private Rect drawableBounds = new Rect();
public CenteredIconButton(Context context) {
this(context, null);
}
public CenteredIconButton(Context context, AttributeSet attrs) {
this(context, attrs, android.R.attr.buttonStyle);
}
public CenteredIconButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (!changed) return;
final CharSequence text = getText();
if (!TextUtils.isEmpty(text)) {
TextPaint textPaint = getPaint();
textPaint.getTextBounds(text.toString(), 0, text.length(), textBounds);
} else {
textBounds.setEmpty();
}
final int width = getWidth() - (getPaddingLeft() + getPaddingRight());
final int height = getHeight() - (getPaddingTop() + getPaddingBottom());
final Drawable[] drawables = getCompoundDrawables();
if (drawables[LEFT] != null) {
drawables[LEFT].copyBounds(drawableBounds);
int leftOffset =
(width - (textBounds.width() + drawableBounds.width()) + getRightPaddingOffset()) / 2 - getCompoundDrawablePadding();
drawableBounds.offset(leftOffset, 0);
drawables[LEFT].setBounds(drawableBounds);
}
if (drawables[RIGHT] != null) {
drawables[RIGHT].copyBounds(drawableBounds);
int rightOffset =
((textBounds.width() + drawableBounds.width()) - width + getLeftPaddingOffset()) / 2 + getCompoundDrawablePadding();
drawableBounds.offset(rightOffset, 0);
drawables[RIGHT].setBounds(drawableBounds);
}
if (drawables[TOP] != null) {
drawables[TOP].copyBounds(drawableBounds);
int topOffset =
(height - (textBounds.height() + drawableBounds.height()) + getBottomPaddingOffset()) / 2 - getCompoundDrawablePadding();
drawableBounds.offset(topOffset, 0);
drawables[TOP].setBounds(drawableBounds);
}
}
}

How to make a full-screen DrawerLayout in Android?

Essentially, I need an "options" menu that can be accessed by swiping the screen left to right (or clicking on the options button in the left top corner of the screen). I also need it to cover the screen, but not fully replace it (it needs to be semi-opaque so that the previous menu is visible beneath it). What I have so far (I'm working on someone else's code, still haven't dechiphered it all, sorry for the lack of information):
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- As the main content view, the view below consumes the entire
space available using match_parent in both dimensions. -->
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- android:layout_gravity="start" tells DrawerLayout to treat
this as a sliding drawer on the left side for left-to-right
languages and on the right side for right-to-left languages.
The drawer is given a fixed width in dp and extends the full height of
the container. A solid background is used for contrast
with the content view. -->
<ListView
android:id="#+id/left_drawer"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
android:choiceMode="singleChoice"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#color/blue"
/>
</android.support.v4.widget.DrawerLayout>
I have some functions to fill in the layout with clickable options, however, I can't make the options go full screen. I swipe left to right, and it only goes about 75% of the way. How can I make it a full-screen options panel?
(I can't make it a new Activity, it needs to overlap with the previous one)
I have the opacity handled and the options buttons, I just can't make this go all the way to the right side of the screen. :D

This works on all android versions:
View mSlidingView = findViewById(R.id.slider);
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
DrawerLayout.LayoutParams params = (DrawerLayout.LayoutParams) mSlidingView.getLayoutParams();
params.width = metrics.widthPixels;
mSlidingView.setLayoutParams(params);
Put this In your onCreate.

The best way to do this is to create a custom DrawerLayout. I found this solution to work perfectly.
Link to custom Full-Screen drawer layout implementation
public class FullDrawerLayout extends DrawerLayout {
private static final int MIN_DRAWER_MARGIN = 0; // dp
public FullDrawerLayout(Context context) {
super(context);
}
public FullDrawerLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public FullDrawerLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY) {
throw new IllegalArgumentException(
"DrawerLayout must be measured with MeasureSpec.EXACTLY.");
}
setMeasuredDimension(widthSize, heightSize);
// Gravity value for each drawer we've seen. Only one of each permitted.
int foundDrawers = 0;
final int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
if (isContentView(child)) {
// Content views get measured at exactly the layout's size.
final int contentWidthSpec = MeasureSpec.makeMeasureSpec(
widthSize - lp.leftMargin - lp.rightMargin, MeasureSpec.EXACTLY);
final int contentHeightSpec = MeasureSpec.makeMeasureSpec(
heightSize - lp.topMargin - lp.bottomMargin, MeasureSpec.EXACTLY);
child.measure(contentWidthSpec, contentHeightSpec);
} else if (isDrawerView(child)) {
final int childGravity =
getDrawerViewGravity(child) & Gravity.HORIZONTAL_GRAVITY_MASK;
if ((foundDrawers & childGravity) != 0) {
throw new IllegalStateException("Child drawer has absolute gravity " +
gravityToString(childGravity) + " but this already has a " +
"drawer view along that edge");
}
final int drawerWidthSpec = getChildMeasureSpec(widthMeasureSpec,
MIN_DRAWER_MARGIN + lp.leftMargin + lp.rightMargin,
lp.width);
final int drawerHeightSpec = getChildMeasureSpec(heightMeasureSpec,
lp.topMargin + lp.bottomMargin,
lp.height);
child.measure(drawerWidthSpec, drawerHeightSpec);
} else {
throw new IllegalStateException("Child " + child + " at index " + i +
" does not have a valid layout_gravity - must be Gravity.LEFT, " +
"Gravity.RIGHT or Gravity.NO_GRAVITY");
}
}
}
boolean isContentView(View child) {
return ((LayoutParams) child.getLayoutParams()).gravity == Gravity.NO_GRAVITY;
}
boolean isDrawerView(View child) {
final int gravity = ((LayoutParams) child.getLayoutParams()).gravity;
final int absGravity = Gravity.getAbsoluteGravity(gravity,
child.getLayoutDirection());
return (absGravity & (Gravity.LEFT | Gravity.RIGHT)) != 0;
}
int getDrawerViewGravity(View drawerView) {
final int gravity = ((LayoutParams) drawerView.getLayoutParams()).gravity;
return Gravity.getAbsoluteGravity(gravity, drawerView.getLayoutDirection());
}
static String gravityToString(int gravity) {
if ((gravity & Gravity.LEFT) == Gravity.LEFT) {
return "LEFT";
}
if ((gravity & Gravity.RIGHT) == Gravity.RIGHT) {
return "RIGHT";
}
return Integer.toHexString(gravity);
}
}

<include
android:id="#+id/left_drawer"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="start"
layout="#layout/drawer"
android:layout_marginLeft="-64dp"/>

It's too late to answer, but for future reads of this question, I am giving my 2c tip: view which holds drawer should have end and right margins set to -64dp, because this value is aparently fixed in the code for rendering drawer.
So, in this case and since android:layout_gravity="start", ListView should have two additional parameters set as follows:
<ListView
...
android:layout_marginEnd="-65dp"
android:layout_marginRight="-65dp" />
On the other hand, if android:layout_gravity="end", then android:layout_marginStart and android:layout_marginLeft should be set to -65dp.

FrameLayout frameLayout = findViewById(R.id.frame_menu);
DrawerLayout.LayoutParams fparams = (DrawerLayout.LayoutParams) frameLayout.getLayoutParams();
DisplayMetrics displaymetrics = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay()
.getMetrics(displaymetrics);
int w = displaymetrics.widthPixels;
fparams.width = w;
frameLayout.setLayoutParams(fparams);
frameLayout.requestLayout();

Programmatically Inflate View with pre-defined measures

I have a layout resource like this and a I want to inflate it with the layout width and height:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="75px"
android:layout_height="25px">
<TextView
android:id="#+id/drawable_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="Name" />
<TextView
android:id="#+id/drawable_description"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#id/drawable_name"
android:layout_alignParentLeft="true"
android:gravity="center_horizontal"
android:layout_below="#+id/drawable_name"
android:text="Some Text" />
</RelativeLayout>
The View could be anything, and I'm converting it to Bitmap.
private Bitmap getBitmap(View v){
v.measure(MeasureSpec.makeMeasureSpec(mDrawableWidth, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(mDrawableHeight, MeasureSpec.EXACTLY));
v.layout(0, 0, mDrawableWidth, mDrawableHeight);
Bitmap returnedBitmap = Bitmap.createBitmap(mDrawableWidth, mDrawableHeight,Bitmap.Config.ARGB_8888);
Canvas c=new Canvas(returnedBitmap);
v.draw(c);
return returnedBitmap;
}
Until now, I have the Width and Height hardcoded and I want to be able to do it programatically, accessing the layout_width and layout_height.
Is there any way to achieve this?
If there's another way of inflating the view with this values without specifying them in the measure, please let me know.
If I create a Custom View, is there any chance of specifying the fixed width and height?

This example should work. Might take some tweaking to get it perfect, depending on your needs, but give it a shot:
//Get a bitmap from a layout resource. Inflates it into a discarded LinearLayout
//so that the LayoutParams are preserved
public static Bitmap getLayoutBitmap (Context c, int layoutRes, int maxWidth, int maxHeight) {
View view = LayoutInflater.from(c).inflate(layoutRes, new LinearLayout(c), false);
return getViewBitmap(view, maxWidth, maxHeight);
}
public static Bitmap getViewBitmap (View v, int maxWidth, int maxHeight) {
ViewGroup.LayoutParams vParams = v.getLayoutParams();
//If the View hasn't been attached to a layout, or had LayoutParams set
//return null, or handle this case however you want
if (vParams == null) {
return null;
}
int wSpec = measureSpecFromDimension(vParams.width, maxWidth);
int hSpec = measureSpecFromDimension(vParams.height, maxHeight);
v.measure(wSpec, hSpec);
final int width = v.getMeasuredWidth();
final int height = v.getMeasuredHeight();
//Cannot make a zero-width or zero-height bitmap
if (width == 0 || height == 0) {
return null;
}
v.layout(0, 0, width, height);
Bitmap result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(result);
v.draw(canvas);
return result;
}
private static int measureSpecFromDimension (int dimension, int maxDimension) {
switch (dimension) {
case ViewGroup.LayoutParams.MATCH_PARENT:
return View.MeasureSpec.makeMeasureSpec(maxDimension, View.MeasureSpec.EXACTLY);
case ViewGroup.LayoutParams.WRAP_CONTENT:
return View.MeasureSpec.makeMeasureSpec(maxDimension, View.MeasureSpec.AT_MOST);
default:
return View.MeasureSpec.makeMeasureSpec(dimension, View.MeasureSpec.EXACTLY);
}
}

One option is to define constants for layout_width and layout_height in the form of attributes and access them programatically in getBitmap.

Android scale up image to fit screen width maintain the image's aspect ratio [duplicate]

I want to download an image (of unknown size, but which is always roughly square) and display it so that it fills the screen horizontally, and stretches vertically to maintain the aspect ratio of the image, on any screen size. Here is my (non-working) code. It stretches the image horizontally, but not vertically, so it is squashed...
ImageView mainImageView = new ImageView(context);
mainImageView.setImageBitmap(mainImage); //downloaded from server
mainImageView.setScaleType(ScaleType.FIT_XY);
//mainImageView.setAdjustViewBounds(true);
//with this line enabled, just scales image down
addView(mainImageView,new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

I accomplished this with a custom view. Set layout_width="fill_parent" and layout_height="wrap_content", and point it to the appropriate drawable:
public class Banner extends View {
private final Drawable logo;
public Banner(Context context) {
super(context);
logo = context.getResources().getDrawable(R.drawable.banner);
setBackgroundDrawable(logo);
}
public Banner(Context context, AttributeSet attrs) {
super(context, attrs);
logo = context.getResources().getDrawable(R.drawable.banner);
setBackgroundDrawable(logo);
}
public Banner(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
logo = context.getResources().getDrawable(R.drawable.banner);
setBackgroundDrawable(logo);
}
#Override protected void onMeasure(int widthMeasureSpec,
int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = width * logo.getIntrinsicHeight() / logo.getIntrinsicWidth();
setMeasuredDimension(width, height);
}
}

In the end, I generated the dimensions manually, which works great:
DisplayMetrics dm = new DisplayMetrics();
context.getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
int height = width * mainImage.getHeight() / mainImage.getWidth(); //mainImage is the Bitmap I'm drawing
addView(mainImageView,new LinearLayout.LayoutParams(
width, height));

I just read the source code for ImageView and it is basically impossible without using the subclassing solutions in this thread. In ImageView.onMeasure we get to these lines:
// Get the max possible width given our constraints
widthSize = resolveAdjustedSize(w + pleft + pright, mMaxWidth, widthMeasureSpec);
// Get the max possible height given our constraints
heightSize = resolveAdjustedSize(h + ptop + pbottom, mMaxHeight, heightMeasureSpec);
Where h and w are the dimensions of the image, and p* is the padding.
And then:
private int resolveAdjustedSize(int desiredSize, int maxSize,
int measureSpec) {
...
switch (specMode) {
case MeasureSpec.UNSPECIFIED:
/* Parent says we can be as big as we want. Just don't be larger
than max size imposed on ourselves.
*/
result = Math.min(desiredSize, maxSize);
So if you have a layout_height="wrap_content" it will set widthSize = w + pleft + pright, or in other words, the maximum width is equal to the image width.
This means that unless you set an exact size, images are NEVER enlarged. I consider this to be a bug, but good luck getting Google to take notice or fix it. Edit: Eating my own words, I submitted a bug report and they say it has been fixed in a future release!
Another solution
Here is another subclassed workaround, but you should (in theory, I haven't really tested it much!) be able to use it anywhere you ImageView. To use it set layout_width="match_parent", and layout_height="wrap_content". It is quite a lot more general than the accepted solution too. E.g. you can do fit-to-height as well as fit-to-width.
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
// This works around the issue described here: http://stackoverflow.com/a/12675430/265521
public class StretchyImageView extends ImageView
{
public StretchyImageView(Context context)
{
super(context);
}
public StretchyImageView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public StretchyImageView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// Call super() so that resolveUri() is called.
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// If there's no drawable we can just use the result from super.
if (getDrawable() == null)
return;
final int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
final int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
int w = getDrawable().getIntrinsicWidth();
int h = getDrawable().getIntrinsicHeight();
if (w <= 0)
w = 1;
if (h <= 0)
h = 1;
// Desired aspect ratio of the view's contents (not including padding)
float desiredAspect = (float) w / (float) h;
// We are allowed to change the view's width
boolean resizeWidth = widthSpecMode != MeasureSpec.EXACTLY;
// We are allowed to change the view's height
boolean resizeHeight = heightSpecMode != MeasureSpec.EXACTLY;
int pleft = getPaddingLeft();
int pright = getPaddingRight();
int ptop = getPaddingTop();
int pbottom = getPaddingBottom();
// Get the sizes that ImageView decided on.
int widthSize = getMeasuredWidth();
int heightSize = getMeasuredHeight();
if (resizeWidth && !resizeHeight)
{
// Resize the width to the height, maintaining aspect ratio.
int newWidth = (int) (desiredAspect * (heightSize - ptop - pbottom)) + pleft + pright;
setMeasuredDimension(newWidth, heightSize);
}
else if (resizeHeight && !resizeWidth)
{
int newHeight = (int) ((widthSize - pleft - pright) / desiredAspect) + ptop + pbottom;
setMeasuredDimension(widthSize, newHeight);
}
}
}

Setting adjustViewBounds to true and using a LinearLayout view group worked very well for me. No need to subclass or ask for device metrics:
//NOTE: "this" is a subclass of LinearLayout
ImageView splashImageView = new ImageView(context);
splashImageView.setImageResource(R.drawable.splash);
splashImageView.setAdjustViewBounds(true);
addView(splashImageView);

I've been struggling with this problem in one form or another for AGES, thank you, Thank You, THANK YOU.... :)
I just wanted to point out that you can get a generalizable solution from what Bob Lee's done by just extending View and overriding onMeasure. That way you can use this with any drawable you want, and it won't break if there's no image:
public class CardImageView extends View {
public CardImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public CardImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CardImageView(Context context) {
super(context);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Drawable bg = getBackground();
if (bg != null) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = width * bg.getIntrinsicHeight() / bg.getIntrinsicWidth();
setMeasuredDimension(width,height);
}
else {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
}

In some cases this magic formula beautifully solves the problem.
For anyone struggling with this coming from another platform, the "size and shape to fit" option is handled beautifully in Android, but it's hard to find.
You typically want this combination:
width match parent,
height wrap content,
adjustViewBounds turned ON (sic)
scale fitCenter
cropToPadding OFF (sic)
Then it's automatic and amazing.
If you're an iOS dev, it's utterly amazing how simply, in Android, you can do "totally dynamic cell heights" in a table view .. err, I mean ListView. Enjoy.
<com.parse.ParseImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/post_image"
android:src="#drawable/icon_192"
android:layout_margin="0dp"
android:cropToPadding="false"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:background="#eff2eb"/>

I have managed to achieve this using this XML code only. It might be the case that eclipse does not render the height to show it expanding to fit; however, when you actually run this on a device, it properly renders and provides the desired result. (well at least for me)
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:src="#drawable/whatever" />
</FrameLayout>

I did it with these values within a LinearLayout:
Scale type: fitStart
Layout gravity: fill_horizontal
Layout height: wrap_content
Layout weight: 1
Layout width: fill_parent

Everyone is doing this programmily so I thought this answer would fit perfectly here. This code worked for my in the xml. Im NOT thinking about ratio yet, but still wanted to place this answer if it would help anyone.
android:adjustViewBounds="true"
Cheers..

A very simple solution is to just use the features provided by RelativeLayout.
Here is the xml that makes it possible with standard Android Views:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<LinearLayout
android:id="#+id/button_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignParentBottom="true"
>
<Button
android:text="button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:text="button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:text="button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
<ImageView
android:src="#drawable/cat"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:layout_above="#id/button_container"/>
</RelativeLayout>
</ScrollView>
The trick is that you set the ImageView to fill the screen but it has to be above the other layouts. This way you achieve everything you need.

Its simple matter of setting adjustViewBounds="true" and scaleType="fitCenter" in the XML file for the ImageView!
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="#drawable/image"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
/>
Note: layout_width is set to match_parent

You are setting the ScaleType to ScaleType.FIT_XY. According to the javadocs, this will stretch the image to fit the whole area, changing the aspect ratio if necessary. That would explain the behavior you are seeing.
To get the behavior you want... FIT_CENTER, FIT_START, or FIT_END are close, but if the image is narrower than it is tall, it will not start to fill the width. You could look at how those are implemented though, and you should probably be able to figure out how to adjust it for your purpose.

ScaleType.CENTER_CROP will do what you want: stretch to full width, and scale the height accordingly. if the scaled height exceeds the screen limits, the image will be cropped.

Look there is a far easier solution to your problem:
ImageView imageView;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout);
imageView =(ImageView)findViewById(R.id.your_imageView);
Bitmap imageBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.your_image);
Point screenSize = new Point();
getWindowManager().getDefaultDisplay().getSize(screenSize);
Bitmap temp = Bitmap.createBitmap(screenSize.x, screenSize.x, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(temp);
canvas.drawBitmap(imageBitmap,null, new Rect(0,0,screenSize.x,screenSize.x), null);
imageView.setImageBitmap(temp);
}

You can use my StretchableImageView preserving the aspect ratio (by width or by height) depending on width and height of drawable:
import android.content.Context;
import android.util.AttributeSet;
import android.widget.ImageView;
public class StretchableImageView extends ImageView{
public StretchableImageView(Context context) {
super(context);
}
public StretchableImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public StretchableImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if(getDrawable()!=null){
if(getDrawable().getIntrinsicWidth()>=getDrawable().getIntrinsicHeight()){
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = width * getDrawable().getIntrinsicHeight()
/ getDrawable().getIntrinsicWidth();
setMeasuredDimension(width, height);
}else{
int height = MeasureSpec.getSize(heightMeasureSpec);
int width = height * getDrawable().getIntrinsicWidth()
/ getDrawable().getIntrinsicHeight();
setMeasuredDimension(width, height);
}
}
}
}

For me the android:scaleType="centerCrop" did not resolve my problem. It actually expanded the image way more. So I tried with android:scaleType="fitXY" and It worked excellent.

This working fine as per my requirement
<ImageView
android:id="#+id/imgIssue"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="fitXY"/>

Custom Views only showing up once

I've made a very simple customView, a gray rectangle with an arbitrary amount of red markings inside the rectangle marked by percentages.
public class DemoView extends View {
private ShapeDrawable mDrawable;
private ArrayList<ShapeDrawable> mMarks;
public DemoView(Context context, int[] marks) {
super(context);
int x = 0;
int y = 0;
int width = 100;
int height = 10;
// Timeline Initially empty
mDrawable = new ShapeDrawable(new RectShape());
mDrawable.getPaint().setColor(Color.GRAY);
mDrawable.setBounds(x, y, x + width, y + height);
// Add marks
if (marks != null && marks.length % 2 == 0) {
mMarks = new ArrayList<ShapeDrawable>(marks.length / 2);
ShapeDrawable mark;
for (int i = 1; i < marks.length; i = i + 2) {
mark = new ShapeDrawable(new RectShape());
mark.getPaint().setColor(Color.RED);
mark.setBounds(x + marks[i - 1], y, x + marks[i], y + height);
mMarks.add(mark);
}
}
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mDrawable.draw(canvas);
if (mMarks != null)
for (ShapeDrawable mark : mMarks)
mark.draw(canvas);
}
}
However I can't figure out how to make use of the view. Each time I try to add more than one of the view in a linearlayout or relativelayout, I only see one of the views.
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/llayout"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
/>
</LinearLayout>
Layout code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LinearLayout ll = (LinearLayout) findViewById(R.id.llayout);
demoview = new DemoView(this, new int[]{10,15,35,60});
demoview.setId(ID_NUM++);
ll.addView(demoview);
demoview2 = new DemoView(this, new int[]{0,1,3,6});
demoview2.setId(ID_NUM++);
ll.addView(demoview2);
demoview3 = new DemoView(this, new int[]{25,60});
demoview3.setId(ID_NUM++);
ll.addView(demoview3);
demoview4 = new DemoView(this, new int[]{15,60});
demoview4.setId(ID_NUM++);
ll.addView(demoview4);
}
Results in:
Is this the wrong route to take? Am I missing some obvious key to using this view multiple times? If this is not the correct route is there some other method to making a custom shape? Perhaps extending rectShape?

Following Mibollma's advice, I watched the video above, a video from Google I/O 2009 about speeding up your UI.
The information is most definitely still applicable two years later. Not only was I able to speed up all of my ListViews through the use of ViewHolder, I was able to find the answer to my question.
When creating a custom view, two methods must be overriden, the first is listed above: onDraw.
The missing method? onMeasure(). More information can be found here.