Android 屏幕显示设置
程序中默的显示是带有标题栏和
系统信息栏的,有的时候,这很影响程序界面的美观。
手机默认的是竖屏,或与感应器状态相关,为了某种效果,我们的程序需要限制使用横屏或竖屏。以下的代码就解决了上述问题。
//设置为无标题栏
Java代码
requestWindowFeature(Window.FEATURE_NO_TITLE);
requestWindowFeature(Window.FEATURE_NO_TITLE);
//设置为全屏模式
Java代码
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
//设置为横屏
Java代码
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
Android Intent参数传递
当Activity与Activity/Service(或其它情况)有时与要进行参数传递,最常用也是最简单的方式就是通过Intent来处理。
看如下代码:
Java代码
Intent intent = new Intent(...);
Bundle bundle = new Bundle();
bundle.putString("NAME", "zixuan");
intent.putExtras(bundle);
context.startActivity(intent); 或 context.startService(intent);
Intent intent = new Intent(...);
Bundle bundle = new Bundle();
bundle.putString("NAME", "zixuan");
intent.putExtras(bundle);
context.startActivity(intent); 或 context.startService(intent);
当然,有传送就有接收,接收也很简单,如:
Java代码
Bundle bunde = intent.getExtras();
String name = bunde.getInt("NAME");
Bundle bunde = intent.getExtras();
String name = bunde.getInt("NAME");
当然参数KEY要与传送时的参数一致。
Android 获取
手机号/手机串号
在j2me中,根本没有办法获取用户的
手机号码,就连获取
手机串号(IMEI)都基本上无法实现,然后在android手机上一切都是如此的简单,看代码:
Java代码
TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
String imei = tm.getDeviceId();
String tel = tm.getLine1Number();
TelephonyManager tm = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
String imei = tm.getDeviceId();
String tel = tm.getLine1Number();
看来,android的确加速了j2me的消亡。
Android 振动器
总感觉
手机上的振动器没有多大用处(当然静音模式下的振铃很有用),但还是顺带着说一下吧,只有两行代码:
1、获取振动服务的实例
Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
2、设置振动时长,单位当然也是ms
vibrator.vibrate(1000);
如果你觉得这样过去单调的话,可以设个节奏:
vibrator.vibrate(new long[]{10, 100, 20, 200}, -1);
两个参数,习惯告诉我第一个是节奏,第二个是重复次数,可事实并没有这么简单,我翻译不好,大家还是看原文吧:
Java代码
public void vibrate (long[] pattern, int repeat)
pattern: an array of longs of times to turn the vibrator on or off.
repeat: the index into pattern at which to repeat, or -1 if you don't want to repeat.
public void vibrate (long[] pattern, int repeat)
pattern: an array of longs of times to turn the vibrator on or off.
repeat: the index into pattern at which to repeat, or -1 if you don't want to repeat.
google喜欢弄些技巧,我却觉得这里有点弄巧成拙了。
Android 闹钟
最近看了一下Android的闹钟管理类(AlarmManager),真不错误,强大又简单,代码如下:
1、建立一个AlarmReceiver继承入BroadcastReceiver,并在AndroidManifest.xml声明
Java代码
public static class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "闹钟提示:时间到!", Toast.LENGTH_LONG).show();
}
}
public static class AlarmReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "闹钟提示:时间到!", Toast.LENGTH_LONG).show();
}
}
2、建立Intent和PendingIntent,来调用目标组件。
Java代码
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
3、设置闹钟
获取闹钟管理的实例:
Java代码
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
设置单次闹钟:
Java代码
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (5*1000), pendingIntent);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (5*1000), pendingIntent);
设置周期闹钟:
Java代码
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10*1000), (24*60*60*1000), pendingIntent);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + (10*1000), (24*60*60*1000), pendingIntent);
搞定!当然这里闹钟的响应处理只是用的文字,你可以播放声音,或都用更复杂的一系统通知,在这里你就是上帝,一切由你做主。