Menus are a common user interface component in many types of applications. To provide a familiar and consistent user experience, you should use the Menu APIs to present user actions and other options in your activities.
Although the design and user experience for some menu items have changed, the semantics to define a set of actions and options is still based on the Menu APIs.
A ViewGroup is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers. This class also defines the ViewGroup.LayoutParams class which serves as the base class for layouts parameters.
void onLayout (boolean changed, int left, int top, int right, int bottom) method is called from layout when this view should assign a size and position to each of its children. Derived classes with children should override this method and call layout on each of their children.
void onMeasure (int widthMeasureSpec, int heightMeasureSpec) method measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overridden by subclasses to provide accurate and efficient measurement of their contents.
When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.
The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.
If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).
Using these two methods we can create our circular view and add the child views in the layout arranging into circular layout. Finally, we can have circular menu UI which can give attractive look and feel to out applications.
Refer the below link for complete sample code:-
Download Sample Code
Have a look on few code snippets,
//activity_cicularmenu2.xml
//circle_menu_item.xml
//CircleActivity.java
//CircleMenuLayout.java
Although the design and user experience for some menu items have changed, the semantics to define a set of actions and options is still based on the Menu APIs.
A ViewGroup is a special view that can contain other views (called children.) The view group is the base class for layouts and views containers. This class also defines the ViewGroup.LayoutParams class which serves as the base class for layouts parameters.
void onLayout (boolean changed, int left, int top, int right, int bottom) method is called from layout when this view should assign a size and position to each of its children. Derived classes with children should override this method and call layout on each of their children.
void onMeasure (int widthMeasureSpec, int heightMeasureSpec) method measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overridden by subclasses to provide accurate and efficient measurement of their contents.
When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.
The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.
If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).
Using these two methods we can create our circular view and add the child views in the layout arranging into circular layout. Finally, we can have circular menu UI which can give attractive look and feel to out applications.
Refer the below link for complete sample code:-
Download Sample Code
Have a look on few code snippets,
//activity_cicularmenu2.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | <LinearLayout 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" android:gravity="center_vertical" android:background="#590100" android:orientation="horizontal" > <circlemenulayout.CircleMenuLayout android:id="@+id/id_menulayout" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="100dp" android:background="@drawable/circle_bg3" > <RelativeLayout android:id="@id/id_circle_menu_item_center" android:layout_width="wrap_content" android:layout_height="wrap_content" > <TextView android:id="@+id/tv_circlemenu" android:textSize="25sp" android:textStyle="bold" android:textColor="#a5f406" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true"/> </RelativeLayout> </circlemenulayout.CircleMenuLayout> </LinearLayout> |
//circle_menu_item.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | <?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:orientation="vertical" > <ImageView android:id="@+id/id_circle_menu_item_image" android:layout_width="wrap_content" android:visibility="gone" android:layout_height="wrap_content" /> <TextView android:id="@+id/id_circle_menu_item_text" android:layout_width="wrap_content" android:visibility="gone" android:layout_height="wrap_content" android:textColor="@android:color/white" android:text="text" android:textSize="16sp" /> </LinearLayout> |
//CircleActivity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | package com.example.harshalbenake.circularlayout; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.animation.Animation; import android.view.animation.RotateAnimation; import android.widget.TextView; import android.widget.Toast; import circlemenulayout.CircleMenuLayout; import circlemenulayout.CircleMenuLayout.OnMenuItemClickListener; /** * <pre> * </pre> */ public class CircleActivity extends Activity { private CircleMenuLayout mCircleMenuLayout; private String[] mItemTexts = new String[]{"Item 0", "Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "Item 6"}; private int[] mItemImgs = new int[]{ R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher}; private TextView mtv_circlemenu; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_cicularmenu2); mCircleMenuLayout = (CircleMenuLayout) findViewById(R.id.id_menulayout); mtv_circlemenu = (TextView) findViewById(R.id.tv_circlemenu); mCircleMenuLayout.setMenuItemIconsAndTexts(mItemImgs, mItemTexts); mCircleMenuLayout.setOnMenuItemClickListener(new OnMenuItemClickListener() { @Override public void itemClick(final View view, int pos) { mtv_circlemenu.setText(mItemTexts[pos]); Animation rotateAnimation = new RotateAnimation(0, 360, view.getWidth() / 2, view.getHeight() / 2); rotateAnimation.setDuration(250); view.startAnimation(rotateAnimation); } @Override public void itemCenterClick(View view) { Toast.makeText(CircleActivity.this, "Middle Item Clicked", Toast.LENGTH_SHORT).show(); } }); } } |
//CircleMenuLayout.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 | package circlemenulayout; import android.content.Context; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.Log; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.WindowManager; import android.widget.ImageView; import android.widget.TextView; import com.example.harshalbenake.circularlayout.R; public class CircleMenuLayout extends ViewGroup { private int mRadius; private static final float RADIO_DEFAULT_CHILD_DIMENSION = 1 / 4f; private float RADIO_DEFAULT_CENTERITEM_DIMENSION = 1 / 3f; private static final float RADIO_PADDING_LAYOUT = 1 / 12f; private static final int FLINGABLE_VALUE = 300; private static final int NOCLICK_VALUE = 3; private int mFlingableValue = FLINGABLE_VALUE; private float mPadding; private double mStartAngle = 0; private String[] mItemTexts; private int[] mItemImgs; private int mMenuItemCount; private float mTmpAngle; private long mDownTime; private boolean isFling; private int mMenuItemLayoutId = R.layout.circle_menu_item; public CircleMenuLayout(Context context, AttributeSet attrs) { super(context, attrs); setPadding(0, 0, 0, 0); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int resWidth = 0; int resHeight = 0; int width = MeasureSpec.getSize(widthMeasureSpec); int widthMode = MeasureSpec.getMode(widthMeasureSpec); int height = MeasureSpec.getSize(heightMeasureSpec); int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (widthMode != MeasureSpec.EXACTLY || heightMode != MeasureSpec.EXACTLY) { resWidth = getSuggestedMinimumWidth(); resWidth = resWidth == 0 ? getDefaultWidth() : resWidth; resHeight = getSuggestedMinimumHeight(); resHeight = resHeight == 0 ? getDefaultWidth() : resHeight; } else { resWidth = resHeight = Math.min(width, height); } setMeasuredDimension(resWidth, resHeight); mRadius = Math.max(getMeasuredWidth(), getMeasuredHeight()); final int count = getChildCount(); int childSize = (int) (mRadius * RADIO_DEFAULT_CHILD_DIMENSION); int childMode = MeasureSpec.EXACTLY; for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() == GONE) { continue; } int makeMeasureSpec = -1; if (child.getId() == R.id.id_circle_menu_item_center) { makeMeasureSpec = MeasureSpec.makeMeasureSpec( (int) (mRadius * RADIO_DEFAULT_CENTERITEM_DIMENSION), childMode); } else { makeMeasureSpec = MeasureSpec.makeMeasureSpec(childSize, childMode); } child.measure(makeMeasureSpec, makeMeasureSpec); } mPadding = RADIO_PADDING_LAYOUT * mRadius; } public interface OnMenuItemClickListener { void itemClick(View view, int pos); void itemCenterClick(View view); } private OnMenuItemClickListener mOnMenuItemClickListener; /** * * @param mOnMenuItemClickListener */ public void setOnMenuItemClickListener( OnMenuItemClickListener mOnMenuItemClickListener) { this.mOnMenuItemClickListener = mOnMenuItemClickListener; } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int layoutRadius = mRadius; // Laying out the child views final int childCount = getChildCount(); int left, top; // menu item int cWidth = (int) (layoutRadius * RADIO_DEFAULT_CHILD_DIMENSION); float angleDelay = 360 / (getChildCount() - 1); for (int i = 0; i < childCount; i++) { final View child = getChildAt(i); if (child.getId() == R.id.id_circle_menu_item_center) continue; if (child.getVisibility() == GONE) { continue; } mStartAngle %= 360; float tmp = layoutRadius / 2f - cWidth / 2 - mPadding; left = layoutRadius / 2 + (int) Math.round(tmp * Math.cos(Math.toRadians(mStartAngle)) - 1 / 2f * cWidth); top = layoutRadius / 2 + (int) Math.round(tmp * Math.sin(Math.toRadians(mStartAngle)) - 1 / 2f * cWidth); child.layout(left, top, left + cWidth, top + cWidth); mStartAngle += angleDelay; } View cView = findViewById(R.id.id_circle_menu_item_center); if (cView != null) { cView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mOnMenuItemClickListener != null) { mOnMenuItemClickListener.itemCenterClick(v); } } }); int cl = layoutRadius / 2 - cView.getMeasuredWidth() / 2; int cr = cl + cView.getMeasuredWidth(); cView.layout(cl, cl, cr, cr); } } private float mLastX; private float mLastY; private AutoFlingRunnable mFlingRunnable; @Override public boolean dispatchTouchEvent(MotionEvent event) { float x = event.getX(); float y = event.getY(); // Log.e("TAG", "x = " + x + " , y = " + y); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: mLastX = x; mLastY = y; mDownTime = System.currentTimeMillis(); mTmpAngle = 0; if (isFling) { removeCallbacks(mFlingRunnable); isFling = false; return true; } break; case MotionEvent.ACTION_MOVE: float start = getAngle(mLastX, mLastY); float end = getAngle(x, y); // Log.e("TAG", "start = " + start + " , end =" + end); if (getQuadrant(x, y) == 1 || getQuadrant(x, y) == 4) { mStartAngle += end - start; mTmpAngle += end - start; } else { mStartAngle += start - end; mTmpAngle += start - end; } requestLayout(); mLastX = x; mLastY = y; break; case MotionEvent.ACTION_UP: float anglePerSecond = mTmpAngle * 1000 / (System.currentTimeMillis() - mDownTime); // Log.e("TAG", anglePrMillionSecond + " , mTmpAngel = " + // mTmpAngle); if (Math.abs(anglePerSecond) > mFlingableValue && !isFling) { post(mFlingRunnable = new AutoFlingRunnable(anglePerSecond)); return true; } if (Math.abs(mTmpAngle) > NOCLICK_VALUE) { return true; } break; } return super.dispatchTouchEvent(event); } @Override public boolean onTouchEvent(MotionEvent event) { return true; } /** * * @param xTouch * @param yTouch * @return */ private float getAngle(float xTouch, float yTouch) { double x = xTouch - (mRadius / 2d); double y = yTouch - (mRadius / 2d); return (float) (Math.asin(y / Math.hypot(x, y)) * 180 / Math.PI); } /** * * @param x * @param y * @return */ private int getQuadrant(float x, float y) { int tmpX = (int) (x - mRadius / 2); int tmpY = (int) (y - mRadius / 2); if (tmpX >= 0) { return tmpY >= 0 ? 4 : 1; } else { return tmpY >= 0 ? 3 : 2; } } /** * * @param resIds */ public void setMenuItemIconsAndTexts(int[] resIds, String[] texts) { mItemImgs = resIds; mItemTexts = texts; if (resIds == null && texts == null) { throw new IllegalArgumentException("IllegalArgumentException"); } mMenuItemCount = resIds == null ? texts.length : resIds.length; if (resIds != null && texts != null) { mMenuItemCount = Math.min(resIds.length, texts.length); } addMenuItems(); } /** * * @param mMenuItemLayoutId */ public void setMenuItemLayoutId(int mMenuItemLayoutId) { this.mMenuItemLayoutId = mMenuItemLayoutId; } /** */ private void addMenuItems() { LayoutInflater mInflater = LayoutInflater.from(getContext()); for (int i = 0; i < mMenuItemCount; i++) { final int j = i; View view = mInflater.inflate(mMenuItemLayoutId, this, false); ImageView iv = (ImageView) view .findViewById(R.id.id_circle_menu_item_image); TextView tv = (TextView) view .findViewById(R.id.id_circle_menu_item_text); if (iv != null) { iv.setVisibility(View.VISIBLE); iv.setImageResource(mItemImgs[i]); iv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (mOnMenuItemClickListener != null) { mOnMenuItemClickListener.itemClick(v, j); } } }); } if (tv != null) { tv.setVisibility(View.VISIBLE); tv.setText(mItemTexts[i]); } addView(view); } } /** * * @param mFlingableValue */ public void setFlingableValue(int mFlingableValue) { this.mFlingableValue = mFlingableValue; } /** * * @param mPadding */ public void setPadding(float mPadding) { this.mPadding = mPadding; } /** * * @return */ private int getDefaultWidth() { WindowManager wm = (WindowManager) getContext().getSystemService( Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); return Math.min(outMetrics.widthPixels, outMetrics.heightPixels); } public class AutoFlingRunnable implements Runnable { private float angelPerSecond; public AutoFlingRunnable(float velocity) { this.angelPerSecond = velocity; } public void run() { if ((int) Math.abs(angelPerSecond) < 20) { isFling = false; return; } isFling = true; mStartAngle += (angelPerSecond / 30); angelPerSecond /= 1.0666F; postDelayed(this, 30); requestLayout(); } } } |
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