android.widget.GridView#setBackgroundColor ( )源码实例Demo

private GridView getViewPagerItem(final int index) {
    GridView gridView = new GridView(_context);
    gridView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
            LayoutParams.WRAP_CONTENT));
    gridView.setNumColumns(7);
    gridView.setVerticalScrollBarEnabled(false);
    gridView.setHorizontalScrollBarEnabled(false);
    gridView.setPadding(8, 8, 8, 0);
    gridView.setVerticalSpacing(CommonUtil.getElementSzie(_context) / 2
            + CommonUtil.getElementSzie(_context) / 3);
    // gridView.setVerticalSpacing(30);
    gridView.setBackgroundColor(Color.TRANSPARENT);
    gridView.setAdapter(new EmoGridViewAdapter(_context,
            getGridViewData(index)));
    gridView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {
            int start = index * (SysConstant.pageSize - 1);
            onEmoGridViewItemClick.onItemClick(position + start, index);
        }
    });
    return gridView;
}
 

private static void initAppsGrid(GridView grid, SharedPreferences options) {
	grid.setBackgroundColor(options.getInt(Keys.APPS_WINDOW_BACKGROUND, 0));
	if (options.getBoolean(Keys.STACK_FROM_BOTTOM, false)) {
		grid.setStackFromBottom(true);
	}
	if (options.getBoolean(Keys.TILE, true)) {
		grid.setNumColumns(GridView.AUTO_FIT);
	}
	
	if (options.getBoolean(Keys.SCROLLBAR, false)) {
		setFastScroll(grid);
	}
}
 

private void init() {
    String[] colors = mContext.getResources().getStringArray(R.array.color_list);
    for (int i = 0; i < colors.length; i++) {
        if (colorDatas == null) {
            colorDatas = new String[colors.length][2];
        }
        colorDatas[i][0] = colors[i].split(",")[0];
        colorDatas[i][1] = colors[i].split(",")[1];
    }

    gridView = new GridView(mContext);
    gridView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    gridView.setBackgroundColor(ContextCompat.getColor(mContext, R.color.white));
    gridView.setNumColumns(8);
    gridView.setPadding(DimenUtils.dip2px(mContext, 8), DimenUtils.dip2px(mContext, 12), DimenUtils.dip2px(mContext, 8), DimenUtils.dip2px(mContext, 12));
    gridView.setGravity(Gravity.CENTER);
    gridView.setHorizontalSpacing(DimenUtils.dip2px(mContext, 4));
    gridView.setVerticalSpacing(DimenUtils.dip2px(mContext, 12));
    gridView.setOnItemClickListener(this);

    setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
    setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
    setBackgroundDrawable(ContextCompat.getDrawable(mContext, R.drawable.rec_solid_primary_bg));
    setFocusable(true);
    setContentView(gridView);

    adapter = new MyAdapter();
    gridView.setAdapter(adapter);
}
 

/**
 * 设置笑脸被点击后的表情数据
 */
private void setSmilingfaceData() {
	mV_myScrollView = new MyScrollView(this);
	mList_emoji = FaceConversionUtil.getInstace().emojiLists;

	// 添加表情页
	mList_emojiAdapter = new ArrayList<EmojiAdapter>();
	mV_myScrollView.removeAllViews();
	for (int i = 0; i < mList_emoji.size(); i++) {
		//			GridView的一些特殊属性：
		//
		//			1.android:numColumns=”auto_fit”   //GridView的列数设置为自动
		//			2.android:columnWidth=”90dp "       //每列的宽度，也就是Item的宽度
		//			3.android:stretchMode=”columnWidth"//缩放与列宽大小同步
		//			4.android:verticalSpacing=”10dp”          //两行之间的边距
		//			5.android:horizontalSpacing=”10dp”      //两列之间的边距 
		//			6.android:cacheColorHint="#00000000" //去除拖动时默认的黑色背景
		//			7.android:listSelector="#00000000"        //去除选中时的黄色底色
		//			8.android:scrollbars="none"                   //隐藏GridView的滚动条
		//			9.android:fadeScrollbars="true"             //设置为true就可以实现滚动条的自动隐藏和显示
		//			10.android:fastScrollEnabled="true"      //GridView出现快速滚动的按钮(至少滚动4页才会显示)
		//			11.android:fadingEdge="none"                //GridView衰落(褪去)边缘颜色为空，缺省值是vertical。(可以理解为上下边缘的提示色)
		//			12.android:fadingEdgeLength="10dip"   //定义的衰落(褪去)边缘的长度
		//			13.android:stackFromBottom="true"       //设置为true时，你做好的列表就会显示你列表的最下面
		//			14.android:transcriptMode="alwaysScroll" //当你动态添加数据时，列表将自动往下滚动最新的条目可以自动滚动到可视范围内
		//			15.android:drawSelectorOnTop="false"  //点击某条记录不放，颜色会在记录的后面成为背景色,内容的文字可见(缺省为false)
		//			
		GridView view = new GridView(this);
		EmojiAdapter adapter = new EmojiAdapter(this, mList_emoji.get(i));
		view.setAdapter(adapter);
		mList_emojiAdapter.add(adapter);
		view.setOnItemClickListener(this);
		view.setNumColumns(7);
		view.setBackgroundColor(Color.TRANSPARENT);
		//			view.setHorizontalSpacing(1); //两列之间的边距
		//			view.setVerticalSpacing(10);//两行之间的边距
		view.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);//缩放与列宽大小同步
		view.setCacheColorHint(0);//去除拖动时默认的黑色背景
		//						view.setPadding(5, 5, 5, 5);
		view.setSelector(new ColorDrawable(Color.TRANSPARENT));
		LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
		view.setLayoutParams(params);
		view.setGravity(Gravity.CENTER);
		mV_myScrollView.addView(view);
	}

	mLl_chat_smilingface_body.removeAllViews();
	mLl_chat_smilingface_body.addView(mV_myScrollView);//将MyScrollView添加到内容显示区

	RadioGroup.LayoutParams params_rb = new RadioGroup.LayoutParams(DensityUtil.dip2px(this, 8), DensityUtil.dip2px(this, 8));
	int marginValue = DensityUtil.dip2px(this, 3);
	params_rb.setMargins(marginValue, 0, marginValue, 0);
	for (int i = 0; i < mV_myScrollView.getChildCount(); i++) {
		RadioButton rbtn = new RadioButton(this);
		rbtn.setButtonDrawable(R.drawable.cgt_selector_chat_radiobtn_bg);
		rbtn.setId(i);
		mRg_chat_smilingface_tab.addView(rbtn, params_rb);
		if (i == 0) {
			rbtn.setChecked(true);
		}
	}
	/**
	 * 监听单选按钮是否被选中,
	 */
	mRg_chat_smilingface_tab.setOnCheckedChangeListener(new OnCheckedChangeListener() {

		@Override
		public void onCheckedChanged(RadioGroup group, int checkedId) {
			current = checkedId;
			mV_myScrollView.moveToDest(checkedId);
		}
	});

	/**
	 * 
	 */
	mV_myScrollView.setChangedListener(new IPageChangedListener() {

		@Override
		public void changedTo(int pageId) {
			current = pageId;
			((RadioButton) mRg_chat_smilingface_tab.getChildAt(pageId)).setChecked(true);
		}
	});
}