基于-Android 自定义钟表设计全部代码

基于 Android 的自定义钟表设计通常涉及创建一个自定义视图或使用现有的组件如 `Chronometer` 实现个性化的需求。下面是一个简单的例子，展示如何创建一个自定义的圆形数字时钟：

首先，你需要创建一个新的布局文件 (e.g., custom_clock.xml)，内容大致如下：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/customClockFace"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:textSize="48sp"
        android:textColor="@color/black"
        android:background="@drawable/circular_background"/>

    <Chronometer
        android:id="@+id/chronometerView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="16dp"
        android:textSize="24sp"
        android:textColor="@color/white"/>
</LinearLayout>

然后，在对应的 Activity 或 Fragment 中设置并初始化：

import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;

public class CustomClockActivity extends AppCompatActivity {

    private CustomCircularView clockFaceView;
    private Chronometer chronometer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_custom_clock);

        clockFaceView = findViewById(R.id.customClockFace);
        chronometer = findViewById(R.id.chronometerView);
        chronometer.setBase(System.currentTimeMillis());

        // 如果需要定时更新显示的时间，可以在这里添加监听器
        chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
            @Override
            public void onChronometerTick(long timeMillis) {
                updateClockDisplay();
            }
        });
    }

    private void updateClockDisplay() {
        clockFaceView.setText(String.format("%02d:%02d", chronometer.getMinute(), chronometer.getCurrentSecond()));
    }

    // 自定义视图 - CustomCircularView.java
    public class CustomCircularView extends View {
        private Paint paint;

        public CustomCircularView(Context context) {
            super(context);
            initPaint();
        }

        public CustomCircularView(Context context, AttributeSet attrs) {
            super(context, attrs);
            initPaint();
        }

        public CustomCircularView(Context context, AttributeSet attrs, int defStyleAttr) {
            super(context, attrs, defStyleAttr);
            initPaint();
        }

        private void initPaint() {
            paint = new Paint();
            paint.setColor(Color.WHITE);
            paint.setTextSize(48);
            paint.setStrokeWidth(4);
            paint.setStyle(Paint.Style.STROKE);
        }

        @Override
        protected void onDraw(Canvas canvas) {
            super.onDraw(canvas);
            canvas.drawCircle(getWidth() / 2, getHeight() / 2, getWidth() * 0.8f, paint);
        }

        // 你可以覆盖此方法来绘制小时、分钟等数字
        protected void drawNumbers(Canvas canvas) {
            String[] hours = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
            for (int i = 0; i <= 11; i++) {
                float angle = (float) (-i * Math.PI / 6);
                canvas.drawText(hours[i % 12], getWidth() / 2 + Math.sin(angle) * 200, getHeight() / 2 + Math.cos(angle) * 200, paint);
            }
        }

        @Override
        protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec));
        }
    }
}