Android 有数据，但就是没有 Draw 出来，怎么办

如题， debug 下是有数据的， onDraw 有运行，但就是没画出来

public class Arkanoid extends View {

private int defaultSize; private int color; private Paint mPaint; static private List<Brick> mBrick = new ArrayList<Brick>(); public Arkanoid(Context context, AttributeSet attrs) { this(context, attrs, 0); } public Arkanoid(Context context) { this(context, null); } /** * 获得我自定义的样式属性 * * @param context * @param attrs * @param defStyle */ public Arkanoid(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); setWillNotDraw(false); TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.Arkanoid, defStyle, 0); int n = a.getIndexCount(); for (int i = 0; i < n; i++) { int attr = a.getIndex(i); switch (attr) { case R.styleable.Arkanoid_aacolor: // 默认颜色设置为黑色 color = a.getColor(attr, Color.BLACK); break; } } a.recycle(); mPaint = new Paint(); mPaint.setColor(color); int value_1 = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()); int value_2 = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 10, getResources().getDisplayMetrics()); int value_3 = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30, getResources().getDisplayMetrics()); int value_4 = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 3, getResources().getDisplayMetrics()); int value_5 = 0; int value_6 = value_2 + value_4; /* int value_1 =50; int value_2 =10; int value_3 =30; int value_4 =3; int value_5 =0; int value_6 =13;*/ for(int i = 0; i < 3 ; ++i){ for(int j = 0; j < 4; ++j ){ Brick x = new Brick(value_1, value_5, value_6, value_3, Color.BLACK); mBrick.add(x); value_5 = value_5 + value_4; } value_1 = value_1 + valu_2; } this.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.mainActivity,"d" , Toast.LENGTH_SHORT).show(); } }); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // super.onMeasure(widthMeasureSpec, heightMeasureSpec); int width = 0; int height = 0; /** * 设置宽度 */ int specMode = MeasureSpec.getMode(widthMeasureSpec); int specSize = MeasureSpec.getSize(widthMeasureSpec); switch (specMode) { case MeasureSpec.EXACTLY:// 明确指定了 width = getPaddingLeft() + getPaddingRight() + specSize; break; case MeasureSpec.AT_MOST:// 一般为 WARP_CONTENT width = getPaddingLeft() + getPaddingRight() + (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1000, getResources().getDisplayMetrics()); break; } /** * 设置高度 */ specMode = MeasureSpec.getMode(heightMeasureSpec); specSize = MeasureSpec.getSize(heightMeasureSpec); switch (specMode) { case MeasureSpec.EXACTLY:// 明确指定了 height = getPaddingTop() + getPaddingBottom() + specSize; break; case MeasureSpec.AT_MOST:// 一般为 WARP_CONTENT height = getPaddingTop() + getPaddingBottom() + (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 140, getResources().getDisplayMetrics()); break; } setMeasuredDimension(width, height); } @Override protected void onDraw(Canvas canvas) { for(Iterator iter = mBrick.iterator(); iter.hasNext();){ Brick q = (Brick) iter.next(); canvas.drawRect(q.x, q.y, q.width, q.height, mPaint); } //canvas.drawRect( 0, 0 ,500,500, mPaint); } class Brick{ public int x; public int y; public int width; public int height; public int color; public Brick(int x,int y, int width, int height, int color){ this.x = x; this.y = y; this.width = width; this.height = height; this.color = color; } } 

}