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   源码介绍

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本实例是遥控器通过key事件处理的，现在我在界面添加了几个按钮代替遥控器按键操作，对于触屏或者遥控器都可以操作

LayoutInflater mInflater = LayoutInflater.from(getContext()); /**  * 根据用户设置的参数，初始化view  */ for (int i = startMenu; i <= endMenu; i  ) {   View view = mInflater.inflate(mMenuItemLayoutId, this, false);  ImageView iv = (ImageView) view  .findViewById(R.id.id_circle_menu_item_image);  final TextView tv = (TextView) view  .findViewById(R.id.id_circle_menu_item_text);  final int j;  if (currnetPage == 1) {  j = i;  } else {  //(currnetPage - 2) * 2 currnetPage减2是减去首尾页只需要添加一项view,乘2是其他项都需要添加两项view (上一页，下一页)  // 加1是第一页需要增加一项，最后一页时候最后一项值大于菜单总数不需要考虑  j = i - ((currnetPage - 2) * 2   1);   }   if (totalPage == 1) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  //不增加更多俺就图片和文字不需要重新计算位置赋值，只需要等于i;  iv.setImageResource(mItemImgs[j]);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText(mItemTexts[j]);  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }   view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {  Toast.makeText(getContext(), mItemTexts[j]   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemClick(view, j);  }  }  }  });  } else {  //最后一页  if (currnetPage == totalPage) {  //最后一页最后一个菜单  if (i == endMenu && mPageNum == 6) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  iv.setImageResource(R.mipmap.ic_more);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText("上一页");  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }  view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {   Toast.makeText(getContext(), "上一页"   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemString(view, "上一页");  }   }  }  });  } else {  //最后一页的其他菜单  if (i < mMenuItemCount   ((currnetPage - 2) * 2   1)) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  //不增加更多俺就图片和文字不需要重新计算位置赋值，只需要等于i;  iv.setImageResource(mItemImgs[j]);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText(mItemTexts[j]);  }  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }   view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {  Toast.makeText(getContext(), mItemTexts[j]   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemClick(view, j);  }  }  }  });   }  //第一页  } else if (currnetPage == 1) {  //第一页最后一个菜单  if (i == endMenu && mPageNum == 6) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  iv.setImageResource(R.mipmap.ic_more);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText("下一页");  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }  view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {  Toast.makeText(getContext(), "下一页"   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemString(view, "下一页");  }  }  }  });  } else {  //第一页其他菜单  if (iv != null) {  iv.setVisibility(View.VISIBLE);  //不增加更多俺就图片和文字不需要重新计算位置赋值，只需要等于i;  iv.setImageResource(mItemImgs[j]);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText(mItemTexts[j]);  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }   view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {  Toast.makeText(getContext(), mItemTexts[j]   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemClick(view, j);  }  }  }  });  }  } else {  //当大于2页才会执行这里，这里属于中间页 ，中间页的最后一项菜单  if (i == endMenu && mPageNum == 6) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  iv.setImageResource(R.mipmap.ic_more);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText("上一页");  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }  view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {   Toast.makeText(getContext(), "上一页"   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemString(view, "上一页");  }   }  }  });  //中间页的最后一项菜单的前一项  } else if (i == endMenu - 1 && mPageNum == 6) {  if (iv != null) {  iv.setVisibility(View.VISIBLE);  iv.setImageResource(R.mipmap.ic_more);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText("下一页");  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }  view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {   Toast.makeText(getContext(), "下一页"   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemString(view, "下一页");  }   }  }  });  } else {  //除去最后两项以外的其他菜单  if (iv != null) {  iv.setVisibility(View.VISIBLE);  //不增加更多俺就图片和文字不需要重新计算位置赋值，只需要等于i;  iv.setImageResource(mItemImgs[j]);  }  if (tv != null) {  tv.setVisibility(View.VISIBLE);  tv.setText(mItemTexts[j]);  }  //设置当前指向菜单的焦点  if (getChildCount() > mCurrentIndex   1) {   getChildAt(mCurrentIndex   1).requestFocus();  }   view.setOnFocusChangeListener(new OnFocusChangeListener() {  @Override  public void onFocusChange(View view, boolean hasFocus) {  if (hasFocus) {  Toast.makeText(getContext(), mItemTexts[j]   "获得焦点", Toast.LENGTH_SHORT).show();  if (mOnMenuItemClickListener != null) {  mOnMenuItemClickListener.itemClick(view, j);  }  }  }  });  }  }  }  //监听key焦点要设置为true;  view.setFocusable(true);  // 添加view到容器中  addView(view); }