android中怎么自定義手表效果，相信很多沒有經(jīng)驗的人對此束手無策，為此本文總結(jié)了問題出現(xiàn)的原因和解決方法，通過這篇文章希望你能解決這個問題。
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3.自定義view，顯示
package com.example.administrator.testz;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import java.util.Calendar;/** * 優(yōu)化方案： * 表盤課繪制一次 * 在分線程中進行加載 */public class MainActivity extends AppCompatActivity implements View.OnClickListener { private Button btnStart, btnStop; private ImageView mClockImageView; Bitmap.Config config = Bitmap.Config.ARGB_8888; int width = 500; int height = 500; private Calendar mCalendar; private int mHour, mMinute, mSecond; private float mDegrees; private float length; private boolean mIsRunning; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnStart = (Button) findViewById(R.id.btn_start); btnStop = (Button) findViewById(R.id.btn_stop); btnStop.setOnClickListener(this); btnStart.setOnClickListener(this); mClockImageView = (ImageView) findViewById(R.id.iv_clock); mClockImageView.setImageBitmap(drawClock()); } /** * 畫表盤 */ private Bitmap drawClockFace() { Bitmap bm = Bitmap.createBitmap(width, height, config); Canvas canvas = new Canvas(bm); Paint paint = new Paint(); paint.setAntiAlias(true); //鋸齒 paint.setStyle(Paint.Style.STROKE); // 空心 paint.setStrokeWidth(5); paint.setColor(Color.parseColor("#333333")); // 外層圓 canvas.drawCircle(width / 2, height / 2, width / 2, paint); // 內(nèi)層圓 --》圓心 paint.setStyle(Paint.Style.FILL); canvas.drawCircle(width / 2, height / 2, 10, paint); // 循環(huán)畫刻度(旋轉(zhuǎn)畫刻度) for (int i = 0; i < 12; i++) { if (i % 3 == 0) { paint.setStrokeWidth(10); canvas.drawLine(width / 2, 0, width / 2, 24, paint); canvas.rotate(30, width / 2, height / 2); } else { canvas.drawLine(width / 2, 0, width / 2, 10, paint); canvas.rotate(30, width / 2, height / 2); } } return bm; } private Bitmap drawClock() { Bitmap bm = drawClockFace(); Canvas canvas = new Canvas(bm); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setColor(Color.parseColor("#333333")); mCalendar = Calendar.getInstance(); mHour = mCalendar.get(Calendar.HOUR); mMinute = mCalendar.get(Calendar.MINUTE); mSecond = mCalendar.get(Calendar.SECOND); //畫小時指針 paint.setStrokeWidth(10); mDegrees = mHour * 30 + mMinute / 2; length = (width / 2) * 0.7f; canvas.save(); canvas.rotate(mDegrees, width / 2, height / 2); canvas.drawLine(width / 2, height / 2, width / 2, height - (height / 2) - length, paint); canvas.restore();// canvas.rotate(360 - mDegrees, width / 2, height / 2); //畫分鐘指針 paint.setStrokeWidth(4); mDegrees = mMinute * 6 + mSecond / 10; length = (width / 2) * 0.78f; canvas.save(); canvas.rotate(mDegrees, width / 2, height / 2); canvas.drawLine(width / 2, height / 2, width / 2, height - (height / 2) - length, paint); canvas.restore();// canvas.rotate(360 - mDegrees, width / 2, height / 2); //畫分鐘指針 paint.setStrokeWidth(2); mDegrees = mSecond * 6; length = (width / 2) * 0.92f; canvas.save(); canvas.rotate(mDegrees, width / 2, height / 2); canvas.drawLine(width / 2, height / 2, width / 2, height - (height / 2) - length, paint); canvas.restore(); return bm; } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_start: mIsRunning = true; new ClockTask().execute(""); break; case R.id.btn_stop: mIsRunning = false; break; } } @Override protected void onDestroy() { super.onDestroy(); mIsRunning = false; } private class ClockTask extends AsyncTask
看完上述內(nèi)容，你們掌握android中怎么自定義手表效果的方法了嗎？如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道，感謝各位的閱讀！
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