自定义View，绘制自己的手表Demo

直接上代码就一个类BoardView public class BoardView extends View { private final static String TAG = BoardView.class.getSimpleName(); private final int defValue = 500; //默认宽高 正方形 因为画一个圆盘 private int widthValue; private Paint mPaint1 = new Paint(); private Paint mPaint2 = new Paint(); private Paint mPaint3 = new Paint(); private Path mPath1 = new Path(); private Path mPath2 = new Path(); private Path mPath3 = new Path(); private float y; private float mDeg1 = 0f; private float mDeg2 = 0f; private float mDeg3 = 0f; private float mC2r; private String date = "00"; //默认日期显示 private Handler mHandler = new Handler(); private boolean isRun = false; public BoardView(Context context) { this(context, null); init(); } public BoardView(Context context, AttributeSet attrs) { this(context, attrs, 0); init(); } public BoardView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.boardView, defStyleAttr, 0); widthValue = typedArray.getDimensionPixelSize(R.styleable.boardView_viewWidth, defValue); typedArray.recycle(); init(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); setMeasuredDimension(widthValue, widthValue); //宽高一样 Log.i(TAG, "onMeasure: widthValue===" + widthValue); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); drawC1orC2(canvas); drawLogo(canvas); drawDate(canvas); drawGraduation(canvas); drawPointer(canvas); } /** * 绘制logo * @param canvas */ private void drawLogo(Canvas canvas){ canvas.save(); String logo = new String("Gladster"); mPaint2.setTextAlign(Paint.Align.CENTER); mPaint2.setTextSize(18f); canvas.drawText(logo,getCenter(),getCenter()/2,mPaint2); canvas.restore(); } /** * 绘制日期 日 * @param canvas */ private void drawDate(Canvas canvas){ canvas.save(); mPaint1.setTextAlign(Paint.Align.CENTER); mPaint1.setTextSize(18f); canvas.drawText(date,getCenter()+getCenter()/2,getCenter(),mPaint1); canvas.restore(); } /** * 绘制大外环 和 小内环 * * @param canvas */ private void drawC1orC2(Canvas canvas) { canvas.save(); y = widthValue / 2 + widthValue / 4; mC2r = getCenter() / 2 - 50; canvas.drawCircle(getCenter(), getCenter(), getCenter() - 4, mPaint1); canvas.drawCircle(getCenter(), y, mC2r, mPaint2); canvas.restore(); } /** * 初始化画 外圈黑内圈的画笔 */ private void init() { Log.i(TAG, "init: start"); mPaint1.setStyle(Paint.Style.STROKE); mPaint1.setAntiAlias(true); mPaint1.setDither(true); mPaint1.setColor(Color.BLACK); mPaint1.setStrokeWidth(4f); mPaint2.setStyle(Paint.Style.STROKE); mPaint2.setColor(Color.GRAY); mPaint2.setAntiAlias(true); mPaint2.setDither(true); mPaint2.setStrokeWidth(2f); mPaint3.setStyle(Paint.Style.FILL); mPaint3.setColor(Color.YELLOW); mPaint3.setAntiAlias(true); mPaint3.setDither(true); mPaint3.setStrokeWidth(4f); } /** * 绘制时针 分针 秒针 * * @param canvas */ private void drawPointer(Canvas canvas) { canvas.save(); canvas.rotate(mDeg3, getCenter(), y); canvas.drawLine(getCenter(), y - mC2r + 10, getCenter(), y, mPaint3); canvas.drawPath(mPath3, mPaint3); canvas.drawPoint(getCenter(), y, mPaint1); canvas.restore(); canvas.save(); mPath2.moveTo(getCenter(), getCenter()); mPath2.lineTo(getCenter() + 6, getCenter() + 6); mPath2.lineTo(getCenter(), 80); mPath2.lineTo(getCenter() - 6, getCenter() + 6); mPath2.lineTo(getCenter(), getCenter()); mPath2.close(); canvas.rotate(mDeg2, getCenter(), getCenter()); canvas.drawPath(mPath2, mPaint3); canvas.restore(); canvas.save(); mPath1.moveTo(getCenter(), getCenter()); mPath1.lineTo(getCenter() + 3, getCenter() + 3); mPath1.lineTo(getCenter(), 20); mPath1.lineTo(getCenter() - 3, getCenter() + 3); mPath1.lineTo(getCenter(), getCenter()); mPath1.close(); canvas.rotate(mDeg1, getCenter(), getCenter()); canvas.drawPath(mPath1, mPaint3); canvas.drawPoint(getCenter(), getCenter(), mPaint1); canvas.restore(); } /** * 绘制外表盘的刻度和小表盘的刻度 * * @param canvas */ private void drawGraduation(Canvas canvas) { canvas.save(); float shorLine = 7; float longLine = 12; for (int i = 0; i < 60; i++) { if (i % 5 == 0) { canvas.drawLine(getCenter(), shorLine, getCenter(), longLine + 3, mPaint1); } else { canvas.drawLine(getCenter(), shorLine, getCenter(), longLine, mPaint1); } canvas.rotate(6, getCenter(), getCenter()); } for (int i = 0; i < 60; i++) { if (i % 5 == 0) { canvas.drawLine(getCenter(), y - (getCenter() / 2 - 53), getCenter(), y - (getCenter() / 2 - 58), mPaint2); } else { canvas.drawLine(getCenter(), y - (getCenter() / 2 - 53), getCenter(), y - (getCenter() / 2 - 55), mPaint2); } canvas.rotate(6, getCenter(), y); } canvas.restore(); } /** * 更新指针角度 */ private void runTime() { mHandler.postDelayed(new Runnable() { @Override public void run() { if(!isRun){ return; } long time = System.currentTimeMillis(); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(time); int hour = calendar.get(Calendar.HOUR); int minute = calendar.get(Calendar.MINUTE); int second = calendar.get(Calendar.SECOND); date = calendar.get(Calendar.DAY_OF_MONTH)+""; mDeg3 = second * 360f / 60; mDeg1 = minute * 360 / 60; mDeg2 = hour * 360 / 12; invalidate(); runTime(); } }, 1000); } //开始 启动 提供的接口 public void start() { if(isRun){ return; } isRun = true; runTime(); } //停止 public void stop(){ isRun = false; } /** * 获得中心原点 * * @return */ private float getCenter() { return widthValue / 2; } } arrts.xml文件 <declare-styleable name="boardView"> <attr name="viewWidth" format="dimension"/> </declare-styleable> main.xml 文件 <com.android.zhiweizhu.mywatchdemo.BoardView android:id="@+id/db" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" db:viewWidth="300dp" /> <Button android:id="@+id/btn1" android:text="@string/start" android:layout_alignParentBottom="true" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Button android:id="@+id/btn2" android:text="@string/stop" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 最后MainActivity public class MainActivity extends AppCompatActivity implements View.OnClickListener { private BoardView mBoardView; private Button mButton1; private Button mButton2; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initViews(); } private void initViews() { mBoardView = (BoardView) findViewById(R.id.db); mButton1 = (Button) findViewById(R.id.btn1); mButton1.setOnClickListener(this); mButton2 = (Button) findViewById(R.id.btn2); mButton2.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.btn1: mBoardView.start(); break; case R.id.btn2: mBoardView.stop(); break; default: break; } } } 完成 收工！！！！