分割线的GridView

在手机应用中看到好多带有分割线的GridView，但android的GridView并没有设置分割线的属性。网上找到的资料就是重写GridView。效果如下：

代码如下：

public class GridViewLine extends GridView {
    private static final String TAG = "GridViewLine";
    private int mColor=Color.LTGRAY;
    public GridViewLine(Context context) {
        super(context);
    }
    public GridViewLine(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public GridViewLine(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }
    public void setLineColor(int color){
        this.mColor=color;
    }
    int i=0;
    @Override
    protected void dispatchDraw(Canvas canvas) {
        super.dispatchDraw(canvas);
        //获取列数
        int columns=getNumColumns();
        //获取子类总数
        int counts=getChildCount();
        Paint paint=new Paint();
        paint.setStyle(Paint.Style.STROKE);
        paint.setColor(mColor);
        int no_lin=counts%columns==0?columns:counts%columns;
        for (int i = 0; i <counts ; i++) {
            View view=getChildAt(i);
            //底线
             if(i<(counts-no_lin)){
                canvas.drawLine(view.getLeft(),view.getBottom(),view.getRight(),view.getBottom(),paint);
            }
            //右线
            if((i+1)%columns!=0){
                canvas.drawLine(view.getRight(),view.getTop(),view.getRight(),view.getBottom(),paint);
            }
        }
    }
}

Activity

public class MainActivity extends AppCompatActivity {

    private GridViewLine gridViewLine;
    private List<Integer> images;
    private List<Map<String,Integer>> maps;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        images=new ArrayList<>();
        maps=new ArrayList<>();

        InitData();

        gridViewLine =(GridViewLine)findViewById(R.id.gridview);
//        gridViewLine.setLineColor(Color.RED);

        SimpleAdapter simpleAdapter=new SimpleAdapter(this,maps,R.layout.gridview_item,new String[]{"image"},new int[]{R.id.image});

        gridViewLine.setAdapter(simpleAdapter);
        gridViewLine.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                Toast.makeText(MainActivity.this,"Click "+i,Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void InitData() {
        images.addAll(Arrays.asList(R.drawable.ic_device_model_htc,R.drawable.ic_device_model_huawei,R.drawable.ic_device_model_iphone,
                R.drawable.ic_device_model_ktouch,R.drawable.ic_device_model_lg,R.drawable.ic_device_model_meizu));

        for(int i=0;i<images.size();i++){
            Map<String,Integer> map=new HashMap<>();
            map.put("image", images.get(i));
            maps.add(map);
        }
    }