Android 自定義view-倒計時控件

直接上代碼

自定義TextView

文字展示
public class StrokeTextView extends TextView {

    private TextView borderText = null;///用於描邊的TextView
    private Context mContext;

    public StrokeTextView(Context context) {
        super(context);
        mContext = context;
        borderText = new TextView(context);
        init();
    }

    public StrokeTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        borderText = new TextView(context, attrs);
        init();
    }

    public StrokeTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        borderText = new TextView(context, attrs, defStyle);
        init();
    }

    public void init() {
        TextPaint tp1 = borderText.getPaint();
        tp1.setStrokeWidth(12);                                  //設置描邊寬度
        tp1.setStyle(Paint.Style.STROKE);                             //對文字只描邊
        //設置自定義字體
        Typeface fromAsset = Typeface.createFromAsset(mContext.getAssets(), "fonts/Alibaba-PuHuiTi-Heavy.ttf");
        borderText.setTypeface(fromAsset, Typeface.ITALIC); //自定義字體 ITALIC斜體
        borderText.setTextColor(Color.parseColor("#F46059"));  //設置描邊顏色
        borderText.setShadowLayer(3.0F, 2F, 2F, Color.parseColor("#ffd44042"));  //設置陰影效果（投影）
        borderText.setGravity(getGravity());
    }

    @Override
    public void setLayoutParams(ViewGroup.LayoutParams params) {
        super.setLayoutParams(params);
        borderText.setLayoutParams(params);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        CharSequence tt = borderText.getText();

        //兩個TextView上的文字必須一致
        if (tt == null || !tt.equals(this.getText())) {
            borderText.setText(getText());
            this.postInvalidate();
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        borderText.measure(widthMeasureSpec, heightMeasureSpec);
    }

    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);
        borderText.layout(left, top, right, bottom);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        borderText.draw(canvas);
        super.onDraw(canvas);
    }

}

xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:background="#F3B243"
    android:layout_height="match_parent"
    tools:context=".countdown.TestCountActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <com.xiao.test.countdown.StrokeTextView
            android:layout_marginTop="100dp"
            android:id="@+id/tv_test"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/play_advertising_timer_bg"
            android:paddingLeft="15dp"
            android:textColor="#FFFFFF"
            android:textSize="33sp"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center"
            android:gravity="center_vertical"
            android:textStyle="italic"
            android:typeface="monospace"
            tools:ignore="RtlSymmetry"
            android:paddingStart="15dp" />

    </RelativeLayout>

</LinearLayout>

倒計時幫助類

public class CountDownHelper {

    private OnCountDownListener onCountDownListener;
    private Disposable disposable;
    private long remainingTime;

    public CountDownHelper(long remainingTime) {
        this.remainingTime = remainingTime;
    }

    /**
     * 回收倒計時
     */
    public void destory() {
        if (disposable != null && !disposable.isDisposed()) {
            disposable.dispose();
        }
    }

    /**
     * 開始倒計時
     */
    public void startCompute() {
        Observable.interval(1, TimeUnit.SECONDS)
                .subscribeOn(Schedulers.newThread())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer<Long>() {
                    @Override
                    public void onSubscribe(Disposable d) {
                        disposable = d;
                    }

                    @Override
                    public void onNext(Long aLong) {
                        if (onCountDownListener == null) {
                            return;
                        }
                        remainingTime -= 1000;
                        if (remainingTime > 0) {
                            int day = (int) (remainingTime / (1000 * 60 * 60 * 24));
                            int hour = (int) ((remainingTime % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
                            int minute = (int) ((remainingTime % (1000 * 60 * 60)) / (1000 * 60));
                            int second = (int) ((remainingTime % (1000 * 60)) / 1000);
                            String dayStr = day >= 10 ? String.valueOf(day) : "0" + day;
                            String hourStr = hour >= 10 ? String.valueOf(hour) : "0" + hour;
                            String minuteStr = minute >= 10 ? String.valueOf(minute) : "0" + minute;
                            String secondStr = second >= 10 ? String.valueOf(second) : "0" + second;
                            onCountDownListener.countDown(dayStr, hourStr, minuteStr, secondStr);
                            if (remainingTime <= 0) {
                                onCountDownListener.countDownFinish();
                                if (disposable != null && !disposable.isDisposed()) {
                                    disposable.dispose();
                                }
                            }
                        } else {
                            onCountDownListener.countDownFinish();
                            if (disposable != null && !disposable.isDisposed()) {
                                disposable.dispose();
                            }
                        }
                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onComplete() {

                    }
                });
    }


    /**
     * 設置倒計時回調監聽
     *
     * @param onCountDownListener 倒計時監聽
     */
    public void setOnCountDownListener(OnCountDownListener onCountDownListener) {
        this.onCountDownListener = onCountDownListener;
    }

    public interface OnCountDownListener {

        /**
         * 倒計時
         *
         * @param day    天
         * @param hour   小時
         * @param minute 分鐘
         * @param second 秒
         */
        void countDown(String day, String hour, String minute, String second);

        /**
         * 倒計時完成
         */
        void countDownFinish();
    }
}

TestCountActivity.java

public class TestCountActivity extends AppCompatActivity {
    private CountDownHelper mCountDownHelper;
    private StrokeTextView mTvTest;

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

        mTvTest = findViewById(R.id.tv_test);

//設置自定義字體
        Typeface fromAsset = Typeface.createFromAsset(getAssets(), "fonts/Alibaba-PuHuiTi-Heavy.ttf");
        mTvTest.setTypeface(fromAsset, Typeface.ITALIC);  //自定義字體 ITALIC斜體

        long aLong = 1787;
        mCountDownHelper = new CountDownHelper(aLong * 1000);
        mCountDownHelper.startCompute();
        mCountDownHelper.setOnCountDownListener(new CountDownHelper.OnCountDownListener() {
            @SuppressLint("SetTextI18n")
            @Override
            public void countDown(String day, String hour, String minute, String second) {
                mTvTest.setText(hour + ":" + minute + ":" + second);
            }

            @Override
            public void countDownFinish() {
                Log.d("", "結束倒計時");
                mCountDownHelper.destory();
                //延時跳轉
                new Handler(new Handler.Callback() {
                    @Override
                    public boolean handleMessage(Message msg) {

                        Toast.makeText(TestCountActivity.this, "時間到了", Toast.LENGTH_SHORT).show();

                        return false;
                    }
                }).sendEmptyMessageDelayed(0, 10000);//表示延遲10秒發送任務

            }
        });


    }
}

引入依賴

implementation ‘io.reactivex.rxjava2:rxjava:2.0.1’
implementation ‘io.reactivex.rxjava2:rxandroid:2.0.1’

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