今天记录一下TextView的倒影效果,显示一串文字,然后在文字的下方显示出它的倒影,先上效果图:
最重要的就是View中getDrawingCache()方法,该方法可以获取cache中的图像,然后绘制出来。
废话不多说,我是想写一个带有倒影的时间,时间可以走动。首先先写一个带有时间走动的View,这个很简单,获取当前时间,然后开启一个线程,隔一秒获取当前时间一次,然后显示在TextView上,当然,我们写控件,就需要继承TextView,代码如下:
package com.alex.reflecttextview;
import java.uTIl.Calendar;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.text.format.DateFormat;
import android.uTIl.AttributeSet;
import android.widget.TextView;
public class TImeView extends TextView {
private staTIc final int MESSAGE_TIME = 1;
public TimeView(Context context, AttributeSet attrs) {
super(context, attrs);
new TimeThread().start();
}
public class TimeThread extends Thread {
@Override
public void run() {
do {
try {
Message msg = new Message();
msg.what = MESSAGE_TIME;
mHandler.sendMessage(msg);
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
} while (true);
}
}
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case MESSAGE_TIME:
setTime();
break;
default:
break;
}
}
};
public void setTime() {
long sysTime = System.currentTimeMillis();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(sysTime);
String sysTimeStr = DateFormat.format(“hh:mm”, sysTime).toString();
if(calendar.get(Calendar.AM_PM) == 0) {
sysTimeStr += “ AM”;
} else {
sysTimeStr += “ PM”;
}
setText(sysTimeStr.replace(“1”, “ 1”));
}
}