今天在說下自定義VIEW--- 實現網格佈局的這個功能吧。最近這個需求是檢測手機螢幕是否出現問題，所以需要觸控式螢幕幕網格，看是否會變色，如果不會變色，說明螢幕對應這塊網格有問題。希望對大家在後面的類似需求的時候，有幫助

直接上程式碼吧

public class GridRelativeLayout extends RelativeLayout {
	private Canvas myCanvas;
	private int horGrid = 100, verGrid = 100;//水平網格和豎直網格
	private int screenW, screenH;//螢幕寬和高
	private boolean initOver = false;//初始化標籤

	public GridRelativeLayout(Context context) {
		super(context);
		setWillNotDraw(false);
	}

	public GridRelativeLayout(Context context, AttributeSet attrs) {
		super(context, attrs);
		setWillNotDraw(false);
	}

	public GridRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		setWillNotDraw(false);
		this.setOnClickListener(new OnClickListener() {


			@Override
			public void onClick(View v) {



			}
		});
	}

	@Override
	protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		this.myCanvas = canvas;
		Paint paint = new Paint();
		paint.setColor(Color.BLACK);//顏色
		paint.setStrokeWidth(3);//線寬
		int verNum = (int)(screenH / verGrid) + 1;
		int horNum = 9;
		if (initOver) {
			for (int i = 0; i < verNum; i++) {
				canvas.drawLine(0, i * verGrid - 1, screenW, i * verGrid - 1,
						paint);
			}
			for (int i = 0; i < horNum-1; i++) {
				canvas.drawLine((i+1)*(screenW/horNum), 1, (i+1)*(screenW/horNum), screenH,
						paint);
			}
		}
	}

	/**設定網格線引數**/
	public void setInf(int vergrid, int horgrid, int screenW, int screenH) {
		this.verGrid = vergrid;
		this.horGrid = horgrid;
		this.screenW = screenW;
		this.screenH = screenH;
		initOver = true;
		postInvalidate();
	}
 

其實核心需要大家去計算和考慮的問題 就是這幾行程式碼

	for (int i = 0; i < verNum; i++) {
				canvas.drawLine(0, i * verGrid - 1, screenW, i * verGrid - 1,
						paint);
			}
			for (int i = 0; i < horNum-1; i++) {
				canvas.drawLine((i+1)*(screenW/horNum), 1, (i+1)*(screenW/horNum), screenH,
						paint);
			}