6*3自定义Cell布局

package com.eken.wondertv.app;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.util.AttributeSet;import android.view.FocusFinder;import android.view.KeyEvent;import android.view.View;import android.view.ViewGroup;import com.wmt.wondertv.common.WorkContext;public class FixedGridLayout extends ViewGroup {private final static String TAG = "FixedGridLayout";public final static int FIXGRID_COLUMN = 6;public final static int FIXGRID_ROW = 3;public final static int CELL_WIDE = 168;private WorkContext mWorkContext;private boolean mOccupied[][] = new boolean[FIXGRID_ROW][FIXGRID_COLUMN];private View firstFocusView;private View lastFocusView;public FixedGridLayout(Context context) {super(context);init();}public FixedGridLayout(Context context, AttributeSet attrs) {super(context, attrs);init();}@Overrideprotected void dispatchDraw(Canvas canvas) {// TODO Auto-generated method stub// 获取布局控件宽高int width = getWidth();int height = getHeight();// 创建画笔Paint mPaint = new Paint();// 设置画笔的各个属性mPaint.setColor(Color.BLUE);mPaint.setStyle(Paint.Style.STROKE);mPaint.setStrokeWidth(10);mPaint.setAntiAlias(true);// 创建矩形框Rect mRect = new Rect(0, 0, width, height);// 绘制边框canvas.drawRect(mRect, mPaint);// 最后必须调用父类的方法super.dispatchDraw(canvas);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {// 记录ViewGroup中Child的总个数int count = getChildCount();// 设置子空间Child的宽高for (int i = 0; i < count; i++) {View childView = getChildAt(i);final CellLayoutParams lp = (CellLayoutParams) childView.getLayoutParams();/* * This is called to find out how big a view should be. The parent * supplies constraint information in the width and height * parameters. The actual mesurement work of a view is performed in * onMeasure(int, int), called by this method. Therefore, only * onMeasure(int, int) can and must be overriden by subclasses. */childView.measure(lp.xColumn*CELL_WIDE, lp.yRow*CELL_WIDE);}// 设置容器控件所占区域大小// 注意setMeasuredDimension和resolveSize的用法setMeasuredDimension(resolveSize(CELL_WIDE * FIXGRID_COLUMN, widthMeasureSpec),resolveSize(CELL_WIDE * FIXGRID_ROW, heightMeasureSpec));// setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);// 不需要调用父类的方法//super.onMeasure(widthMeasureSpec, heightMeasureSpec);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {int count = getChildCount();for (int i = 0; i < count; i++) {final View child = getChildAt(i);final CellLayoutParams lp = (CellLayoutParams) child.getLayoutParams();int left = getPaddingLeft() + lp.positionX*CELL_WIDE;int top = getPaddingTop() + lp.positionY*CELL_WIDE;final int right = left + lp.xColumn*CELL_WIDE;final int bottom = top + lp.yRow*CELL_WIDE;child.layout(left, top, right, bottom);//Log.e(TAG, "width: "+child.getWidth()+" height: "+child.getHeight());//if (child == this.getFocusedChild() ) {//final int width = (int) (lp.xColumn * CELL_WIDE * 1.1);//final int height = (int) (lp.yRow * CELL_WIDE * 1.1);//left =(int) (left - (lp.xColumn * CELL_WIDE*0.1) / 2);//top = (int) (top - (lp.yRow * CELL_WIDE*0.1) / 2);////child.layout(left , top , left + width , top//+ height);////}}}public void setWorkContext(WorkContext mWorkContext) {this.mWorkContext = mWorkContext;}@Overridepublic boolean dispatchKeyEvent(KeyEvent event) {return super.dispatchKeyEvent(event) || executeKeyEvent(event);}private boolean executeKeyEvent(KeyEvent event) {if (event.getAction() == KeyEvent.ACTION_DOWN) {View currentFocused = findFocus();if (currentFocused == this)currentFocused = null;final int keyCode = event.getKeyCode();if (KeyEvent.KEYCODE_DPAD_LEFT == keyCode|| KeyEvent.KEYCODE_DPAD_RIGHT == keyCode) {final View nextFocused = getChildTopParent(FocusFinder.getInstance().findNextFocus(this,currentFocused,keyCode == KeyEvent.KEYCODE_DPAD_LEFT ? View.FOCUS_LEFT: View.FOCUS_RIGHT));switch (keyCode) {case KeyEvent.KEYCODE_DPAD_LEFT:if (nextFocused == null) {firstFocusView = currentFocused;mWorkContext.mHandler.removeMessages(View.FOCUS_LEFT);mWorkContext.mHandler.sendEmptyMessage(View.FOCUS_LEFT);return true;}break;case KeyEvent.KEYCODE_DPAD_RIGHT:if (nextFocused == null) {lastFocusView = currentFocused;mWorkContext.mHandler.removeMessages(View.FOCUS_RIGHT);mWorkContext.mHandler.sendEmptyMessage(View.FOCUS_RIGHT);return true;}break;}}}return false;}public View getFirstFocusView() {return firstFocusView != null ? firstFocusView : null;}public View getLastFocusView() {return lastFocusView != null ? lastFocusView : null;}public boolean insertView(View view,int positionX,int positionY,int xColumn,int yRow) {if(positionX>=0&&positionY>=0&&positionX<FIXGRID_COLUMN&&positionY<FIXGRID_ROW&&xColumn>0&&yRow>0&&(positionX + xColumn <= FIXGRID_COLUMN)&& (positionY + yRow <= FIXGRID_ROW)){//这个逻辑判断是添加的组件必须要网格之内int count =0;for(int i=0;i<yRow;i++){for(int j=0;j<xColumn;j++)if(!mOccupied[positionY+i][positionX+j])count++;}if(count == xColumn*yRow){for(int i=0;i<yRow;i++){for(int j=0;j<xColumn;j++){mOccupied[positionY+i][positionX+j] = true;//itemList.add(itemView);}}CellLayoutParams cellLayout = new CellLayoutParams(positionX, positionY, xColumn, yRow);this.addView(view,cellLayout);return true;}}return false;}//-----------------------------------------------------private View getChildTopParent(View child) {// get the outer View but not the PanelGroupwhile (child != null && child.getParent() != null&& child.getParent() != this&& View.class.isAssignableFrom(child.getParent().getClass())) {child = (View) child.getParent();}return child;}private void init(){for(int i = 0;i<FIXGRID_ROW;i++)for(int j=0;j<FIXGRID_COLUMN;j++)mOccupied[i][j] = false;}public static class CellLayoutParams extends ViewGroup.MarginLayoutParams {public int positionX = 0;public int positionY = 0;public int xColumn = 1;public int yRow = 1;public CellLayoutParams(int positionX,int positionY,int xColumn,int yRow) {super(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);this.positionX = positionX;this.positionY = positionY;this.xColumn = xColumn;this.yRow = yRow;}}}