android 酷炫倒计时,android 好用的倒计时
android倒計時 是在原有TextView的基礎上進行二次開發的自定義View
效果圖
這個主要是結合了android的CountDownTimer，這個一般就是發送短信的倒計時。
包含功能
倒計時時間超過一個小時顯示 時：分：秒
時間小于一小時顯示：分 ：秒：毫秒
支持時間帶有邊框
實現思路
倒計時實現上可以通過Android的CountDownTimer進行時間上的倒計時功能
倒計時要有背景框，實現思路上有3個TextView設置，這個比較麻煩對于CountDownTimer回調回來的時間需要切割，怪麻煩的，還有一種就是 設計整個一個TextView，在TextView的onDraw()方法中，對它進行二次繪制，這樣就可以了
這里采用對就是一個TextView，對它的onDraw()進行二次繪制。
直接上代碼
package xx.xx.xx.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.os.CountDownTimer;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.annotation.Nullable;
import android.support.v7.widget.AppCompatTextView;
import android.util.AttributeSet;
import xx.xx.xx.R;
/**
* Created by odvl on 2016/12/5.
*/
public class CountDownTimeTextView extends AppCompatTextView {
private static final String SPLIT = " : ";
private static final String BLANK = " ";
private static final int RADIUS = 4;
static final long MS_IN_A_DAY = 1000 * 60 * 60 * 24;
static final long MS_IN_AN_HOUR = 1000 * 60 * 60;
static final long MS_IN_A_MINUTE = 1000 * 60;
static final long MS_IN_A_SECOND = 1000;
public static final String DEFAULT_TIME = " 00 : 00 : 00 ";
private String simTime = "";
private CountDownTimer timer;
private Paint borderPaint;
private boolean border = false;
public CountDownTimeTextView(Context context) {
super(context);
init(context, null);
}
public CountDownTimeTextView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public CountDownTimeTextView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
if (attrs != null) {
TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.CountDownTimeTextView);
if (ta.hasValue(R.styleable.CountDownTimeTextView_border)) {
border = ta.getBoolean(R.styleable.CountDownTimeTextView_border, false);
borderPaint = new Paint();
borderPaint.setDither(true);
borderPaint.setAntiAlias(true);
borderPaint.setStyle(Paint.Style.STROKE);
borderPaint.setStrokeWidth(1f);
borderPaint.setColor(Color.parseColor("#999999"));
}
}
}
@Override
public Parcelable onSaveInstanceState() {
Parcelable parcelable = super.onSaveInstanceState();
SaveState ss = new SaveState(parcelable);
ss.text = simTime;
return ss;
}
@Override
public void onRestoreInstanceState(Parcelable state) {
SaveState ss = (SaveState) state;
super.onRestoreInstanceState(ss.getSuperState());
setText(ss.text);
}
static class SaveState extends BaseSavedState {
private String text;
public SaveState(Parcel source) {
super(source);
text = (String) source.readString();
}
public SaveState(Parcelable superState) {
super(superState);
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeString(text);
}
public static final Parcelable.Creator CREATOR = new Creator() {
@Override
public SaveState createFromParcel(Parcel source) {
return new SaveState(source);
}
@Override
public SaveState[] newArray(int size) {
return new SaveState[size];
}
};
}
public void setTime(long time, final OnFinishListener listener) {
if (timer != null) {
timer.cancel();
}
setText(DEFAULT_TIME);
timer = new CountDownTimer(time, 1) {
@Override
public void onTick(long l) {
if (l >= 1 * 60 * 60 * 1000) { //超過1小時
simTime = getTimeFromLong(l);
} else {
simTime = getMillisecondsTimes(l);
}
setText(simTime);
}
@Override
public void onFinish() {
setText(DEFAULT_TIME);
listener.onFinish();
}
};
}
private String getMillisecondsTimes(long l) {
l = l % MS_IN_AN_HOUR;
long minutes = l / MS_IN_A_MINUTE; //分
l = l % MS_IN_A_MINUTE;
long seconds = l / MS_IN_A_SECOND; //秒
l = l % MS_IN_A_SECOND;
long milliseconds = l / 10; //毫秒
StringBuffer sb = new StringBuffer();
if (minutes >= 10) {
sb.append(BLANK + String.valueOf(minutes) + SPLIT);
} else {
sb.append(BLANK + "0" + String.valueOf(minutes) + SPLIT);
}
if (seconds >= 10) {
sb.append(String.valueOf(seconds) + SPLIT);
} else {
sb.append("0" + String.valueOf(seconds) + SPLIT);
}
if (milliseconds >= 10) {
sb.append(String.valueOf(milliseconds) + BLANK);
} else {
sb.append("0" + String.valueOf(milliseconds) + BLANK);
}
String result = sb.toString();
return result;
}
public String getTimeFromLong(long diff) {
diff = diff % MS_IN_A_DAY;
long numHours = diff / MS_IN_AN_HOUR;
diff = diff % MS_IN_AN_HOUR;
long numMinutes = diff / MS_IN_A_MINUTE;
diff = diff % MS_IN_A_MINUTE;
long numSeconds = diff / MS_IN_A_SECOND;
StringBuffer buf = new StringBuffer();
if (numHours >= 10) { //hour
buf.append(BLANK + numHours + SPLIT);
} else if (numHours >= 0 && numHours < 10) {
buf.append(BLANK + "0" + numHours + SPLIT);
}
if (numMinutes >= 10) { //minutes
buf.append(numMinutes + SPLIT);
} else if (numMinutes >= 0 && numMinutes < 10) {
buf.append("0" + numMinutes + SPLIT);
}
if (numSeconds >= 10) { //seconds
buf.append(numSeconds + BLANK);
} else if (numSeconds >= 0 && numSeconds < 10) {
buf.append("0" + numSeconds + BLANK);
}
String result = buf.toString();
return result;
}
public void start() {
timer.start();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (border) {
String text = getText().toString();
String[] result = text.split(":");
float[] length = new float[result.length];
float splitWidth = getPaint().measureText(":");
float blankWidth = getPaint().measureText(" ");
if (result.length > 0) {
float height = canvas.getHeight() - getPaddingBottom();
for (int i = 0; i < result.length; i++) {
float value = getPaint().measureText(result[i]);
length[i] = value;
}
if (result.length == 3) {
RectF r1 = new RectF((int) (getPaddingLeft() + blankWidth / 2), getPaddingTop(), (int) (getPaddingLeft() + length[0] - blankWidth / 2), (int) (getPaddingTop() + height));
RectF r2 = new RectF((int) (r1.right + blankWidth + splitWidth), getPaddingTop(), (int) (r1.right + splitWidth + length[1]), (int) (getPaddingTop() + height));
RectF r3 = new RectF((int) (r2.right + blankWidth + splitWidth), getPaddingTop(), (int) (r2.right + splitWidth + length[2]), (int) (getPaddingTop() + height));
canvas.drawRoundRect(r1, RADIUS, RADIUS, borderPaint);
canvas.drawRoundRect(r2, RADIUS, RADIUS, borderPaint);
canvas.drawRoundRect(r3, RADIUS, RADIUS, borderPaint);
} else {
return;
}
}
}
}
public interface OnFinishListener {
void onFinish();
}
}
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