之前看到一篇博客使用两个TextView实现了该效果,于是我想用自定义控件的方式实现一个LEDView,使用时即可直接使用该控件。
采用组合控件的方式,将两个TextView叠放在一起,再使用digital-7.ttf字体来显示数据,从而达到LED的效果。代码如下:
LEDView.class
[java] view plain copy
package ione.zy.demo;
import java.io.File;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Typeface;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TextView;
public class LEDView extends LinearLayout {
private TextView timeView;
private TextView bgView;
private static final String FONT_DIGITAL_7 = "fonts" + File.separator
+ "digital-7.ttf";
private static final String DATE_FORMAT = "%02d:%02d:%02d";
private static final int REFRESH_DELAY = 500;
private final Handler mHandler = new Handler();
private final Runnable mTimeRefresher = new Runnable() {
@Override
public void run() {
Calendar calendar = Calendar.getInstance(TimeZone
.getTimeZone("GMT+8"));
final Date d = new Date();
calendar.setTime(d);
timeView.setText(String.format(DATE_FORMAT,
calendar.get(Calendar.HOUR), calendar.get(Calendar.MINUTE),
calendar.get(Calendar.SECOND)));
mHandler.postDelayed(this, REFRESH_DELAY);
}
};
@SuppressLint("NewApi")
public LEDView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context);
}
public LEDView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public LEDView(Context context) {
super(context);
init(context);
}
private void init(Context context) {
LayoutInflater layoutInflater = LayoutInflater.from(context);
View view = layoutInflater.inflate(R.layout.ledview, this);
timeView = (TextView) view.findViewById(R.id.ledview_clock_time);
bgView = (TextView) view.findViewById(R.id.ledview_clock_bg);
AssetManager assets = context.getAssets();
final Typeface font = Typeface.createFromAsset(assets, FONT_DIGITAL_7);
timeView.setTypeface(font);// 设置字体
bgView.setTypeface(font);// 设置字体
}
public void start() {
mHandler.post(mTimeRefresher);
}
public void stop() {
mHandler.removeCallbacks(mTimeRefresher);
}
}