I'm coding a ring menu that is going to put together several different types of view, which will have all the same size. The thing is that it works perfectly with native views, like ImageView, but when I try to put a custom labeled image view, it simply doesn't appear int the custom ViewGroup. It's also worth mentioning that when this view is declared in the XML file, outside de custom ViewGroup it is shown just fine, but as soon as I put it inside the ViewGroup, or declare it programatically, it vanishes. My guess is that I'm doing something weong inside the onLayout method, but I can't put my finger on it, since all coordinates and view sizes are correct according to the Log.
The XML file for the CompoundView:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:clickable="true"
android:focusable="true">
<ImageView
android:id="#+id/header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:src="#drawable/ropeiconselector"/>
<TextView
android:id="#+id/label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="WWWWWWWWWWWW"
android:background="#color/button"
android:layout_marginLeft="-10dp"
android:layout_centerVertical="true"
android:layout_toRightOf="#id/header"
android:padding="8dp"
/>
The code for the CompoundView (I omitted some unimportant methods)
public class CircularLabeledImageView extends RelativeLayout implements View.OnClickListener {
ImageView headerView;
TextView labelView;
boolean isOpen = false;
String[] itemDesc;
int position;
int size;
int maxLabelWidth = 100;
int minLabelWidth = 20;
final Handler timeHandler = new Handler();
Runnable toggleTimer;
public CircularLabeledImageView(Context context) {
super(context);
//EDIT Methhod called
initView(context);
}
public CircularLabeledImageView(Context context, AttributeSet attrs) {
super(context, attrs);
initView(context);
}
public CircularLabeledImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView(context);
}
private void initView(Context context){
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.expandabletextimageview, this);
headerView = (ImageView) this.findViewById(R.id.header);
labelView = (TextView) this.findViewById(R.id.label);
labelView.setBackgroundResource(R.color.backgroundMenuContents);
headerView.setOnClickListener(this);
itemDesc = new String[]{"Item A","Item B", "Item C","Quantos itens"};
size = itemDesc.length;
toggleTimer = new Runnable() {
#Override
public void run() {
toggle();
}
};
this.setOnFocusChangeListener(new OnFocusChangeListener() {
#Override
public void onFocusChange(View v, boolean hasFocus) {
if (isOpen) {
toggle();
}
}
});
}
}
The code for the custom ViewGroup
public class RingListMenu extends ViewGroup implements View.OnClickListener {
boolean isOpen = true;
int headerSize= 90;
int childSize= 80;
int radiusInit = 150;
int childInitSize = 80;
int radius = 150;
int padding;
DPoint center = new DPoint();
float startingAngle= 2;
DPoint click0;
DPoint clickIni;
DPoint clickFinal;
final static float SENSIBILITY = 10f;
final static float FRICTION = 0.00001f;
final static float MAXVELOCITY = 0.06f;
final static long TOGGLE_DURATION = 300;
private VelocityTracker vTracker = null;
boolean isScrolling;
ImageView circleView;
OnItemClickListener listener = null;
public RingListMenu(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
if (android.os.Build.VERSION.SDK_INT >= 11)
{
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
TypedArray at = context.obtainStyledAttributes(attrs,R.styleable.RingListMenu);
childInitSize = childSize = at.getDimensionPixelSize(R.styleable.RingListMenu_childSize, 0);
radiusInit = radius = at.getDimensionPixelSize(R.styleable.RingListMenu_circleRadius, 0);
headerSize = at.getDimensionPixelSize(R.styleable.RingListMenu_headerSize, 0);
padding = at.getDimensionPixelSize(R.styleable.RingListMenu_padding, 0);
}
public RingListMenu(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
if (android.os.Build.VERSION.SDK_INT >= 11)
{
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
TypedArray at = context.obtainStyledAttributes(attrs,R.styleable.RingListMenu);
childInitSize = childSize = at.getDimensionPixelSize(R.styleable.RingListMenu_childSize, 0);
radiusInit = radius = at.getDimensionPixelSize(R.styleable.RingListMenu_circleRadius, 0);
headerSize = at.getDimensionPixelSize(R.styleable.RingListMenu_headerSize, 0);
padding = at.getDimensionPixelSize(R.styleable.RingListMenu_padding, 0);
}
public RingListMenu(Context context, AttributeSet attrs) {
super(context, attrs);
if (android.os.Build.VERSION.SDK_INT >= 11)
{
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
TypedArray at = context.obtainStyledAttributes(attrs, R.styleable.RingListMenu);
childInitSize = childSize = at.getDimensionPixelSize(R.styleable.RingListMenu_childSize, 0);
radiusInit = radius = at.getDimensionPixelSize(R.styleable.RingListMenu_circleRadius, 0);
headerSize = at.getDimensionPixelSize(R.styleable.RingListMenu_headerSize, 0);
padding = at.getDimensionPixelSize(R.styleable.RingListMenu_padding, 0);
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
Log.d("RingList", "Calling Ring list onLayout" + childSize + " " + radius + " " + headerSize);
float angle = (float) (2*Math.PI)/(getChildCount()-1);
center.x = padding+headerSize/2;
center.y = padding+headerSize/2;
float childX;
float childY;
//radius = (float) (getChildCount()*(minSpacing+2*childSize)/(2*Math.PI));
for (int i = 1; i < getChildCount(); i++) {
View child = getChildAt(i);
childX = (float) (center.x + radius * Math.cos(startingAngle + i * angle));
childY = (float) (center.y + radius * Math.sin(startingAngle + i * angle));
child.layout((int) (childX - childSize / 2), (int) (childY - childSize / 2),
(int) (childX + childSize / 2), (int) (childY + childSize / 2));
}
View header = getChildAt(0);
header.setX(padding);
header.setY(padding);
header.layout(padding, padding, padding + headerSize, padding + headerSize);
}
#Override
public void addView(View child) {
child.setTag(getChildCount());
super.addView(child);
child.setOnClickListener(this);
}
}
And finally, the declaration part:
RingListMenu ring = (RingListMenu) findViewById(R.id.ring);
CircularLabeledImageView ViewA = new CircularLabeledImageView(this);
ring.addView(ViewA);
Related
I have a custom EditText which I got from here.
PROBLEM: This by default, opens the normal keyboard. I want to open the numeric keyboard. I tried adding inputType="number" in the XML, but then it stops showing the placeholder lines.
How can I make this open the numeric keyboard while still showing the placeholder lines ?
Also, how is it possible to set maxLength from inside the class ?
Below is the code:
public class PinEntryEditText extends android.support.v7.widget.AppCompatEditText {
public static final String XML_NAMESPACE_ANDROID = "http://schemas.android.com/apk/res/android";
private float mSpace = 10; //24 dp by default, space between the lines
private float mCharSize;
private float mNumChars = 6;
private float mLineSpacing = 8; //8dp by default, height of the text from our lines
private int mMaxLength = 6;
private int pinLength;
private OnClickListener mClickListener;
private float mLineStroke = 1; //1dp by default
private float mLineStrokeSelected = 2; //2dp by default
private Paint mLinesPaint;
int[][] mStates = new int[][]{
new int[]{android.R.attr.state_selected}, // selected
new int[]{android.R.attr.state_focused}, // focused
new int[]{-android.R.attr.state_focused}, // unfocused
};
int[] mColors = new int[]{
Color.GREEN,
Color.BLACK,
Color.GRAY
};
ColorStateList mColorStates = new ColorStateList(mStates, mColors);
public PinEntryEditText(Context context) {
super(context);
}
public PinEntryEditText(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.PinEntryEditText , 0, 0);
try {
pinLength = ta.getInteger(R.styleable.PinEntryEditText_pinLength , mMaxLength);
} finally {
ta.recycle();
}
mNumChars = pinLength;
mMaxLength = pinLength;
init(context, attrs);
}
public PinEntryEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
float multi = context.getResources().getDisplayMetrics().density;
mLineStroke = multi * mLineStroke;
mLineStrokeSelected = multi * mLineStrokeSelected;
mLinesPaint = new Paint(getPaint());
mLinesPaint.setStrokeWidth(mLineStroke);
if (!isInEditMode()) {
TypedValue outValue = new TypedValue();
context.getTheme().resolveAttribute(R.attr.colorControlActivated,
outValue, true);
final int colorActivated = outValue.data;
mColors[0] = colorActivated;
context.getTheme().resolveAttribute(R.attr.colorPrimaryDark,
outValue, true);
final int colorDark = outValue.data;
mColors[1] = colorDark;
context.getTheme().resolveAttribute(R.attr.colorControlHighlight,
outValue, true);
final int colorHighlight = outValue.data;
mColors[2] = colorHighlight;
}
setBackgroundResource(0);
mSpace = multi * mSpace; //convert to pixels for our density
mLineSpacing = multi * mLineSpacing; //convert to pixels for our density
mMaxLength = attrs.getAttributeIntValue(XML_NAMESPACE_ANDROID, "maxLength", mMaxLength);
mNumChars = mMaxLength;
//Disable copy paste
super.setCustomSelectionActionModeCallback(new ActionMode.Callback() {
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
public void onDestroyActionMode(ActionMode mode) {
}
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
return false;
}
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return false;
}
});
// When tapped, move cursor to end of text.
super.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
setSelection(getText().length());
if (mClickListener != null) {
mClickListener.onClick(v);
}
}
});
}
#Override
public void setOnClickListener(OnClickListener l) {
mClickListener = l;
}
#Override
public void setCustomSelectionActionModeCallback(ActionMode.Callback actionModeCallback) {
throw new RuntimeException("setCustomSelectionActionModeCallback() not supported.");
}
#Override
protected void onDraw(Canvas canvas) {
//super.onDraw(canvas);
int availableWidth = getWidth() - getPaddingRight() - getPaddingLeft();
if (mSpace < 0) {
mCharSize = (availableWidth / (mNumChars * 2 - 1));
} else {
mCharSize = (availableWidth - (mSpace * (mNumChars - 1))) / mNumChars;
}
int startX = getPaddingLeft();
int bottom = getHeight() - getPaddingBottom();
//Text Width
Editable text = getText();
int textLength = text.length();
float[] textWidths = new float[textLength];
getPaint().getTextWidths(getText(), 0, textLength, textWidths);
for (int i = 0; i < mNumChars; i++) {
updateColorForLines(i == textLength);
canvas.drawLine(startX, bottom, startX + mCharSize, bottom, mLinesPaint);
if (getText().length() > i) {
float middle = startX + mCharSize / 2;
canvas.drawText(text, i, i + 1, middle - textWidths[0] / 2, bottom - mLineSpacing, getPaint());
}
if (mSpace < 0) {
startX += mCharSize * 2;
} else {
startX += mCharSize + mSpace;
}
}
}
private int getColorForState(int... states) {
return mColorStates.getColorForState(states, Color.GRAY);
}
/**
* #param next Is the current char the next character to be input?
*/
private void updateColorForLines(boolean next) {
if (isFocused()) {
mLinesPaint.setStrokeWidth(mLineStrokeSelected);
mLinesPaint.setColor(getColorForState(android.R.attr.state_focused));
if (next) {
mLinesPaint.setColor(getColorForState(android.R.attr.state_selected));
}
} else {
mLinesPaint.setStrokeWidth(mLineStroke);
mLinesPaint.setColor(getColorForState(-android.R.attr.state_focused));
}
}
}
XML:
<com.mridulahuja.kudamm.tools.PinEntryEditText
android:id="#+id/txtToken"
android:layout_width="0dp"
android:layout_height="55dp"
android:ems="10"
pin:pinLength="6"
android:gravity="center"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginRight="15dp"
android:layout_marginEnd="15dp"
android:layout_marginLeft="15dp"
android:layout_marginStart="15dp"
app:layout_constraintLeft_toLeftOf="parent"/>
Default length is set from code:
private int mMaxLength = 6;
But this library reads value from xml too:
mMaxLength = attrs.getAttributeIntValue(XML_NAMESPACE_ANDROID, "maxLength", mMaxLength);
so you can use both approaches.
In order to make placeholders visible you should add the _ symbol like this:
android:digits="0123456789_"
May be you'll need to add some other symbols, based on your needs.
The custom View in my custom ViewGroup refuses to show the drawable given to it by calling setImageResource(). It is laid out as I need it, however, as you can see in this screenshot, it's empty:
Also, it won't react on an onClick event.
Here's the java code for my Activity
public class MainActivity extends Activity {
public static final String TAG = "MainActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
BattleShipsGameBoard gb = (BattleShipsGameBoard) findViewById(R.id.gameboard);
Tile tile = new Tile(this);
tile.setImageResource(R.drawable.tile_hit);
tile.setGameObjectType(BattleShipsGameBoard.LayoutParams.LAYOUT_TYPE_TILE);
tile.setPosition(new Point(50, 50));
tile.setWidth(90);
tile.setHeight(90);
gb.addView(tile);
}
}
and my custom view
public class Tile extends ImageView {
#SuppressWarnings("unused")
private static final String TAG = "Tile";
public int tag;
public int gameObjectType;
public Point position = new Point(0, 0);
public int mWidth = 1;
public int mHeight = 1;
public boolean isSelected = false;
public Tile(Context context) {
super(context);
setLayoutParams(new BattleShipsGameBoard.LayoutParams(
BattleShipsGameBoard.LayoutParams.WRAP_CONTENT,
BattleShipsGameBoard.LayoutParams.WRAP_CONTENT));
}
public Tile(Context context, AttributeSet attrs) {
super(context, attrs);
}
public Tile(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void confirmChangesInLayout() {
BattleShipsGameBoard.LayoutParams lp = (BattleShipsGameBoard.LayoutParams) this
.getLayoutParams();
lp.setPosition(this.position);
lp.setWidth(this.mWidth);
lp.setHeight(this.mHeight);
setLayoutParams(lp);
invalidate();
requestLayout();
}
//... getters and setters, the setters all call confirmChangesInLayout()
}
my simple custom ViewGroup:
public class BattleShipsGameBoard extends ViewGroup {
public static class LayoutParams extends MarginLayoutParams {
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
}
public LayoutParams(int width, int height) {
super(width, height);
}
public Point position = new Point(0, 0);
public int type = 0;
public int height = 0;
public int width = 0;
//getters and setters
}
public BattleShipsGameBoard(Context context) {
super(context);
}
public BattleShipsGameBoard(Context context, AttributeSet attrs) {
super(context, attrs);
}
public BattleShipsGameBoard(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
private float unitWidth;
private float unitHeight;
private int parentWidth;
private int parentHeight;
/**
* count of units the screen estate is divided by
*/
public static int unitCount = 100;
/**
* Rectangle in which the size of a child is temporarily stored
*/
private Rect mTmpChildRect = new Rect();
/**
* lays out children
*/
#Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
Log.d(TAG, "-------------STARTING LAYOUT, " + getChildCount() + " children -------------");
int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
LayoutParams lp = (LayoutParams) child.getLayoutParams();
Point pos = lp.getPosition();
int height = lp.getHeight();
int width = lp.getWidth();
measureChild(child, parentWidth, parentHeight);
mTmpChildRect.left = (int) ((pos.x - (width / 2)) * unitWidth);
mTmpChildRect.right = (int) ((pos.x + (width / 2)) * unitWidth);
mTmpChildRect.top = (int) ((pos.y + (height / 2)) * unitHeight);
mTmpChildRect.bottom = (int) ((pos.y - (height / 2)) * unitHeight);
child.layout(mTmpChildRect.left, mTmpChildRect.top, mTmpChildRect.right, mTmpChildRect.bottom);
Log.d(TAG,
}
}
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
parentHeight = MeasureSpec.getSize(heightMeasureSpec);
parentWidth = MeasureSpec.getSize(widthMeasureSpec);
unitHeight = parentHeight / unitCount;
unitWidth = parentWidth / unitCount;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (child.getVisibility() != View.GONE) {
child.measure(widthMeasureSpec, heightMeasureSpec);
}
}
setMeasuredDimension(parentWidth, parentHeight);
}
/**
* Any layout manager that doesn't scroll will want this.
*/
#Override
public boolean shouldDelayChildPressedState() {
return false;
}
}
I just found the problem.
In the onLayout() method I mixed up mTmpChildRect.top and mTmpChildRect.bottom which is why it looked like it was laid out correctly but nothing could be drawn.
I this specific example I want set hint text color progrommatically but I couldn't change it.
public class FloatingHintEditText extends EditText {
private static enum Animation { NONE, SHRINK, GROW }
private final Paint mFloatingHintPaint = new Paint();
private final ColorStateList mHintColors;
private final float mHintScale;
private final int mAnimationSteps;
private boolean mWasEmpty;
private int mAnimationFrame;
private Animation mAnimation = Animation.NONE;
public FloatingHintEditText(Context context) {
this(context, null);
}
public FloatingHintEditText(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.floatingHintEditTextStyle);
}
public FloatingHintEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedValue typedValue = new TypedValue();
getResources().getValue(R.dimen.floatinghintedittext_hint_scale, typedValue, true);
mHintScale = typedValue.getFloat();
mAnimationSteps = getResources().getInteger(R.dimen.floatinghintedittext_animation_steps);
mHintColors = getHintTextColors();
mWasEmpty = TextUtils.isEmpty(getText());
}
#Override
public int getCompoundPaddingTop() {
final FontMetricsInt metrics = getPaint().getFontMetricsInt();
final int floatingHintHeight = (int) ((metrics.bottom - metrics.top) * mHintScale);
return super.getCompoundPaddingTop() + floatingHintHeight;
}
#Override
protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
super.onTextChanged(text, start, lengthBefore, lengthAfter);
final boolean isEmpty = TextUtils.isEmpty(getText());
// The empty state hasn't changed, so the hint stays the same.
if (mWasEmpty == isEmpty) {
return;
}
mWasEmpty = isEmpty;
// Don't animate if we aren't visible.
if (!isShown()) {
return;
}
if (isEmpty) {
mAnimation = Animation.GROW;
setHintTextColor(Color.TRANSPARENT);
} else {
mAnimation = Animation.SHRINK;
}
}
#Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (TextUtils.isEmpty(getHint())) {
return;
}
final boolean isAnimating = mAnimation != Animation.NONE;
// The large hint is drawn by Android, so do nothing.
if (!isAnimating && TextUtils.isEmpty(getText())) {
return;
}
mFloatingHintPaint.set(getPaint());
mFloatingHintPaint.setColor(
mHintColors.getColorForState(getDrawableState(), mHintColors.getDefaultColor()));
final float hintPosX = getCompoundPaddingLeft() + getScrollX();
final float normalHintPosY = getBaseline();
final float floatingHintPosY = normalHintPosY + getPaint().getFontMetricsInt().top + getScrollY();
final float normalHintSize = getTextSize();
final float floatingHintSize = normalHintSize * mHintScale;
// If we're not animating, we're showing the floating hint, so draw it and bail.
if (!isAnimating) {
mFloatingHintPaint.setTextSize(floatingHintSize);
canvas.drawText(getHint().toString(), hintPosX, floatingHintPosY, mFloatingHintPaint);
return;
}
if (mAnimation == Animation.SHRINK) {
drawAnimationFrame(canvas, normalHintSize, floatingHintSize,
hintPosX, normalHintPosY, floatingHintPosY);
} else {
drawAnimationFrame(canvas, floatingHintSize, normalHintSize,
hintPosX, floatingHintPosY, normalHintPosY);
}
mAnimationFrame++;
if (mAnimationFrame == mAnimationSteps) {
if (mAnimation == Animation.GROW) {
setHintTextColor(mHintColors);
}
mAnimation = Animation.NONE;
mAnimationFrame = 0;
}
invalidate();
}
private void drawAnimationFrame(Canvas canvas, float fromSize, float toSize,
float hintPosX, float fromY, float toY) {
final float textSize = lerp(fromSize, toSize);
final float hintPosY = lerp(fromY, toY);
mFloatingHintPaint.setTextSize(textSize);
canvas.drawText(getHint().toString(), hintPosX, hintPosY, mFloatingHintPaint);
}
private float lerp(float from, float to) {
final float alpha = (float) mAnimationFrame / (mAnimationSteps - 1);
return from * (1 - alpha) + to * alpha;
}
}
So when I call from my activity mEditText.setHintTextColor(getResources().getColor(R.color.red)) the color doesn't change
The color changes when I set only from xml.
I tried to do mEditText.invalidate() but it doesn't help too.
What should I do here to make my hintTextColor red.
Make your fields not final and try this:
public FloatingHintEditText(Context context) {
super(context);
init();
}
public FloatingHintEditText(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public FloatingHintEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
TypedValue typedValue = new TypedValue();
getResources().getValue(R.dimen.floatinghintedittext_hint_scale, typedValue, true);
mHintScale = typedValue.getFloat();
mAnimationSteps = getResources().getInteger(R.dimen.floatinghintedittext_animation_steps);
mHintColors = getHintTextColors();
mWasEmpty = TextUtils.isEmpty(getText());
}
I want to develop my own Accept and Decline buttons for an incoming call. To prevent the call to be accidentally answered or rejected when taking the phone out of the pocket I would like to make a slider style button or something similar. I am, to accept the call is not just to tap on the Accept button. It would be more like sliding the finger from left to right (or opposite) and let the button get wider with the moment. Just like Android does.
Is there any way to make this? Any hint?
I hope to be clear.
How about create an image and slide it to the right (or left) and then send the event to an Activity or any view that you wanna handle the result?
For this, you can created a custom view which implements OnTouchListener :
public class ImageTouchSlider extends RelativeLayout implements View.OnTouchListener {
private Context mContext;
private ImageView mImage;
private int mScreenWidthInPixel;
private int mScreenWidthInDp;
private float mDensity;
private int mPaddingInDp = 15;
private int mPaddingInPixel;
private int mLengthOfSlider;
public interface OnImageSliderChangedListener{
void onChanged();
}
private OnImageSliderChangedListener mOnImageSliderChangedListener;
public ImageTouchSlider(Context context) {
super(context);
mContext = context;
createView();
}
public ImageTouchSlider(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
createView();
}
public ImageTouchSlider(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContext = context;
createView();
}
public void createView() {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.image_touch_slider, this, true);
mImage = (ImageView) findViewById(R.id.slider_image);
mImage.setOnTouchListener(this);
WindowManager manager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
DisplayMetrics outMetrics = new DisplayMetrics ();
display.getMetrics(outMetrics);
mDensity = getResources().getDisplayMetrics().density;
float dpWidth = outMetrics.widthPixels / mDensity;
mScreenWidthInPixel = outMetrics.widthPixels;
mScreenWidthInDp = (int) (mScreenWidthInPixel / mDensity);
mLengthOfSlider = (int) (mScreenWidthInDp - mPaddingInDp*2);
}
#Override
public boolean onTouch(View v, MotionEvent event) {
LayoutParams layoutParams = (LayoutParams) v.getLayoutParams();
int width = v.getWidth();
float xPos = event.getRawX();
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
// You can add some clicked reaction here.
break;
case MotionEvent.ACTION_MOVE:
if(xPos < (mScreenWidthInPixel - width - mPaddingInDp*mDensity) && xPos > mPaddingInDp*mDensity) {
mOnImageSliderChangedListener.onChanged();
layoutParams.leftMargin = (int) xPos - width / 2;
mImage.setLayoutParams(layoutParams);
}
break;
case MotionEvent.ACTION_UP:
break;
default:
break;
}
return true;
}
public void setOnImageSliderChangedListener(OnImageSliderChangedListener listener) {
mOnImageSliderChangedListener = listener;
}
} //end of class
image_touch_slider.xml layout :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:id="#+id/slider"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_centerVertical="true"
android:src="#drawable/your_drawable" />
</RelativeLayout>
You can modify screen width calculation part (my current code is not so clean), and add this view in .xml like this :
<com.your.package.path.ImageTouchSlider
android:id="#+id/slider"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
In your class, you can find this view :
ImageTouchSlider slider = (ImageTouchSlider) findViewById(R.id.slider);
slider.setOnImageSliderChangedListener(new ImageTouchSlider.OnImageSliderChangedListener() {
#Override
public void onChanged() {
// do something what you want here.
}
});
Hope this can help! :)
If you have your own sliding layout then see this code, might be helpful for you.
public class UnlockBar extends RelativeLayout
{
private OnUnlockListener listener = null;
private TextView text_label = null;
private ImageView img_thumb = null;
private int thumbWidth = 0;
boolean sliding = false;
private int sliderPosition = 0;
int initialSliderPosition = 0;
float initialSlidingX = 0;
public UnlockBar(Context context)
{
super(context);
init(context, null);
}
public UnlockBar(Context context, AttributeSet attrs)
{
super(context, attrs);
init(context, attrs);
}
public UnlockBar(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init(context, attrs);
}
public void setOnUnlockListener(OnUnlockListener listener)
{
this.listener = listener;
}
public void reset()
{
final RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) img_thumb.getLayoutParams();
ValueAnimator animator = ValueAnimator.ofInt(params.leftMargin, 0);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator)
{
params.leftMargin = (Integer) valueAnimator.getAnimatedValue();
img_thumb.requestLayout();
}
});
animator.setDuration(300);
animator.start();
text_label.setAlpha(1f);
}
private void init(Context context, AttributeSet attrs)
{
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.unlock_main, this, true);
// Retrieve layout elements
text_label = (TextView) findViewById(R.id.text_label);
img_thumb = (ImageView) findViewById(R.id.img_thumb);
// Get padding
thumbWidth = dpToPx(80); // 60dp + 2*10dp
}
#Override
#SuppressLint("ClickableViewAccessibility")
public boolean onTouchEvent(MotionEvent event)
{
super.onTouchEvent(event);
if (event.getAction() == MotionEvent.ACTION_DOWN)
{
if (event.getX() > sliderPosition && event.getX() < (sliderPosition + thumbWidth))
{
sliding = true;
initialSlidingX = event.getX();
initialSliderPosition = sliderPosition;
}
}
else if (event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_OUTSIDE)
{
if (sliderPosition >= (getMeasuredWidth() - thumbWidth))
{
if (listener != null) listener.onUnlock();
}
else
{
sliding = false;
sliderPosition = 0;
reset();
}
}
else if (event.getAction() == MotionEvent.ACTION_MOVE && sliding)
{
sliderPosition = (int) (initialSliderPosition + (event.getX() - initialSlidingX));
if (sliderPosition <= 0) sliderPosition = 0;
if (sliderPosition >= (getMeasuredWidth() - thumbWidth))
{
sliderPosition = (int) (getMeasuredWidth() - thumbWidth);
}
else
{
int max = (int) (getMeasuredWidth() - thumbWidth);
int progress = (int) (sliderPosition * 100 / (max * 1.0f));
text_label.setAlpha(1f - progress * 0.02f);
}
setMarginLeft(sliderPosition);
}
return true;
}
private void setMarginLeft(int margin)
{
if (img_thumb == null) return;
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) img_thumb.getLayoutParams();
params.setMargins(margin, 0, 0, 0);
img_thumb.setLayoutParams(params);
}
private int dpToPx(int dp)
{
float density = getResources().getDisplayMetrics().density;
return Math.round((float)dp * density);
}
public static interface OnUnlockListener {
void onUnlock();
}
}
And just set the listener in main activity
UnlockBar unlock = (UnlockBar) findViewById(R.id.unlock);
// Attach listener
unlock.setOnUnlockListener(new OnUnlockListener() {
#Override
public void onUnlock()
{
Toast.makeText(TestActivity.this, "You've successfully unlocked it !", Toast.LENGTH_LONG).show();
}
});
And draw your own slide_image_layout.xml
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="80dp"
android:layout_width="match_parent"
android:background="#000000"
android:padding="10dp">
<ImageView
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_alignParentLeft="true"
android:src="#drawable/unlock_left"
android:contentDescription="#string/unlock_locked" />
<ImageView
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:layout_alignParentRight="true"
android:src="#drawable/unlock_right"
android:contentDescription="#string/unlock_unlocked" />
<TextView
android:id="#+id/text_label"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:layout_centerInParent="true"
android:gravity="center"
android:text="#string/unlock_instructions"
android:textColor="#android:color/white"
android:textSize="18sp"
android:textStyle="italic" />
<ImageView
android:id="#+id/img_thumb"
android:layout_height="match_parent"
android:layout_width="wrap_content"
android:src="#drawable/unlock_thumb"
android:contentDescription="#string/unlock_thumb" />
</RelativeLayout>
And in your main_layout.xml add this ..
<com.hamondigital.unlock.UnlockBar
android:id="#+id/unlock"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
Please help! I tried everything! :(
I've got a schedule Class, which is simply a custom ViewGroup (with custom onMeasure() and onLayout()), which enables me to place childs(=events) with LayoutParams for column/row start and column/row end. The number of childs and their LayoutParams depend on database entries.
Now I'm trying to add childs (events) from my database. I'd have to use a Cursor Adapter, so my schedule Class has to extend ListView, right? I tried that but the newView() method of the adapter is never called. Why not??
My custom ListView doesn't ask the adapter for childs, no childs are added. I also can't add the childs by hand calling schedule.addView() if I extend from AdapterView.
I'd be really (really) happy if someone could help!
Regards,
cody
This is my custom ViewGroup:
public class Schedule extends ViewGroup {
private int columns;
private int rows;
private float preferredCellWidth;
private float preferredCellHeight;
private String[] rowTimes;
private Paint paint;
public Schedule(Context context, int columns, int rows, float preferredCellWidth, float preferredCellHeight, String[] rowTimes) {
super(context);
this.columns = columns;
this.rows = rows;
this.preferredCellWidth = preferredCellWidth;
this.preferredCellHeight = preferredCellHeight;
this.rowTimes = rowTimes;
init(context);
}
private void init(Context context) {
Log.i("Schedule", "initSchedule...");
setPaint();
setWillNotDraw(false);
}
private void setPaint() {
paint = new Paint();
paint.setTextSize(preferredCellHeight*2/3);
paint.setStyle(Paint.Style.STROKE);
paint.setColor(getResources().getColor(R.color.white));
}
public Schedule(Context context, AttributeSet attrs) {
super(context, attrs);
readAttr(context, attrs);
init(context);
}
public Schedule(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
readAttr(context, attrs);
init(context);
}
private void readAttr(Context c, AttributeSet attrs) {
android.content.res.TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.ScheduleLayout);
this.columns = a.getInt(R.styleable.ScheduleLayout_columns, 1);
this.rows = a.getInt(R.styleable.ScheduleLayout_rows, 1);
this.preferredCellWidth = a.getDimension(R.styleable.ScheduleLayout_preferredCellWidth, 1);
this.preferredCellHeight = a.getDimension(R.styleable.ScheduleLayout_preferredCellHeight, 1);
a.recycle();
}
#Override
protected void onDraw(Canvas canvas) {
//Log.i(this.toString(),"onDraw ..."+" this.getLeft()="+this.getLeft()+", this.getWidth()="+this.getWidth());
super.onDraw(canvas);
for (int i = 0; i < rows; i++) {
int line = (int) Math.round(this.getTop()+ (i+1) * preferredCellHeight);
canvas.drawText(this.rowtimes[i], this.getLeft()+5, line-3, paint);
canvas.drawLine(this.getLeft(), line, this.getWidth(), line, paint);
}
}
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.i("Schedule", "onMeasure...");
float width = (MeasureSpec.getSize(widthMeasureSpec) - getPaddingLeft() - getPaddingRight()) / columns;
float height = (MeasureSpec.getSize(heightMeasureSpec) - getPaddingTop() - getPaddingBottom()) / rows;
float cellWidth = preferredCellWidth;
float cellHeight = preferredCellHeight;
if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.EXACTLY) {
cellWidth = width;
} else if (MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.AT_MOST) {
cellWidth = Math.min(preferredCellWidth, width);
}
if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.EXACTLY) {
cellHeight = height;
} else if (MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST) {
cellHeight = Math.min(preferredCellHeight, height);
}
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (child.getVisibility() != GONE) {
LayoutParams lp = (LayoutParams) child.getLayoutParams();
int cwidth = (int) Math.round(cellWidth * lp.getWidth());
int cheight = (int) Math.round(cellHeight * lp.getHeight());
child.measure(
MeasureSpec.makeMeasureSpec(cwidth, MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(cheight, MeasureSpec.EXACTLY)
);
}
}
setMeasuredDimension(
(int) Math.round(cellWidth * columns + getPaddingLeft() + getPaddingRight()),
(int) Math.round(cellHeight * rows + getPaddingTop() + getPaddingBottom())
);
}
#Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (!changed)
return;
int cellWidth = ((r-l) - getPaddingLeft() - getPaddingRight()) / columns;
int cellHeight = ((b-t) - getPaddingTop() - getPaddingBottom()) / rows;
for (int i = 0; i < getChildCount(); i++) {
View child = getChildAt(i);
if (child.getVisibility() != GONE) {
LayoutParams lp = (LayoutParams) child.getLayoutParams();
int cl = (int) Math.round(getPaddingLeft() + lp.columnStart * cellWidth);
int cr = (int) Math.round(getPaddingLeft() + lp.columnEnd * cellWidth);
int ct = (int) Math.round(getPaddingTop() + lp.rowStart * cellHeight);
int cb = (int) Math.round(getPaddingTop() + lp.rowEnd * cellHeight);
child.layout(cl, ct, cr, cb);
}
}
}
protected boolean checkLayoutParams(android.view.ViewGroup.LayoutParams p) {
Log.i("Schedule", "checkLayoutParams...");
if (p instanceof LayoutParams) {
LayoutParams lp = (LayoutParams) p;
if (lp.columnEnd > columns || lp.columnStart < 0)
return false;
if (lp.rowEnd > rows || lp.rowStart < 0)
return false;
return lp.columnEnd > lp.columnStart && lp.rowEnd > lp.rowStart;
} else
return false;
}
public android.widget.AbsListView.LayoutParams generateLayoutParams(AttributeSet attrs) {
return new android.widget.AbsListView.LayoutParams(getContext(), attrs);
}
public static class LayoutParams extends android.view.ViewGroup.LayoutParams {
public int columnStart;
public int columnEnd;
public int rowStart;
public int rowEnd;
public LayoutParams(int columnStart, int rowStart, int columnEnd, int rowEnd) {
super(WRAP_CONTENT, WRAP_CONTENT);
this.columnStart = columnStart;
this.columnEnd = columnEnd;
this.rowStart = rowStart;
this.rowEnd = rowEnd;
}
public LayoutParams(Context c, AttributeSet attrs) {
super(WRAP_CONTENT, WRAP_CONTENT);
android.content.res.TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.EventLayout);
this.columnStart = a.getInt(R.styleable.EventLayout_event_columnStart, 0);
this.columnEnd = a.getInt(R.styleable.EventLayout_event_columnEnd, this.columnStart + 1);
this.rowStart = a.getInt(R.styleable.EventLayout_event_rowStart, 0);
this.rowEnd = a.getInt(R.styleable.EventLayout_event_rowEnd, this.rowStart + 1);
a.recycle();
}
public int getWidth() {
return columnEnd - columnStart;
}
public int getHeight() {
return rowEnd - rowStart;
}
}
And this is the event-layout - event.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:orientation="vertical"
android:gravity="center" >
<TextView android:id="#+id/text_event_name"
style="#style/Event_TextView1" />
<TextView android:id="#+id/text_event_name2"
style="#style/Event_TextView2" />
</LinearLayout>
<TextView android:id="#+id/text_event_weeks"
style="#style/Event_TextView2"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true" />
<TextView android:id="#+id/text_event_room"
style="#style/Event_TextView2"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true" />
In my Activity I've got that code:
Schedule schedule = new Schedule(this, 4, rowTimes.length, 15, 15, rowTimes);
Cursor cursor = dbManager.getEvents(day);
MySimpleCurserAdapter adapter = ... ??
// schedule.setAdapter not working...
How can I add events to the schedule with the data from the cursor?
You should not need to be extending ListView. You just want to add an instance of ListView to your layout.
It sounds like you might want to be using a SimpleCursorAdaptor, where you can map items in your custom view to the data model objects you want them to display.
See Binding to Data with Adapter and Hello ListView for some examples of the right ways to use adapters and ListViews.