Android TV listview及焦点处理

setItemsCanFocus(true)

android:focusable="true

package com.cn21.ecloud.tv.ui.widget; 
 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Rect; 
import android.graphics.drawable.Drawable; 
import android.util.AttributeSet; 
import android.widget.RelativeLayout; 
 
public class SelectedRelativeLayout extends RelativeLayout{ 
  private Drawable mFloatDrawable; 
  private Rect mTempRect = new Rect(); 
 
  public SelectedRelativeLayout(Context context) { 
    this(context, null, 0); 
  } 
 
  public SelectedRelativeLayout(Context context, AttributeSet attrs) { 
    this(context, attrs, 0); 
  } 
 
  public SelectedRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) { 
    super(context, attrs, defStyleAttr); 
    mFloatDrawable = getResources().getDrawable(R.drawable.item_float_rectangle); 
  } 
 
  @Override 
  protected void dispatchDraw(Canvas canvas) { 
    super.dispatchDraw(canvas); 
    if (hasFocus()) { 
      if (mFloatDrawable != null) { 
        final int w = getMeasuredWidth(); 
        final int h = getMeasuredHeight(); 
        mFloatDrawable.getPadding(mTempRect); 
        mFloatDrawable.setBounds(-mTempRect.left, -mTempRect.top, 
            w + mTempRect.right, h + mTempRect.bottom); 
        mFloatDrawable.draw(canvas); 
      } 
    } 
  } 
}