Android原生模块DeskClock分析1(10)

DeskClock分析文档

Alarms.deleteAlarm(SetAlarm.this, mId); finish(); } })

.setNegativeButton(android.R.string.cancel, null) .show(); }

? formatToast方法，当启动闹钟后，计算的启动时间，通过toast显示 static String formatToast(Context context, long timeInMillis) { Log.e(\

long delta = timeInMillis - System.currentTimeMillis(); long hours = delta / (1000 * 60 * 60); long minutes = delta / (1000 * 60) % 60; long days = hours / 24; hours = hours % 24;

String daySeq = (days == 0) ? \

(days == 1) ? context.getString(R.string.day) : context.getString(R.string.days, Long.toString(days));

String minSeq = (minutes == 0) ? \

(minutes == 1) ? context.getString(R.string.minute) : context.getString(R.string.minutes, Long.toString(minutes));

String hourSeq = (hours == 0) ? \

(hours == 1) ? context.getString(R.string.hour) : context.getString(R.string.hours, Long.toString(hours));

boolean dispDays = days > 0; boolean dispHour = hours > 0; boolean dispMinute = minutes > 0;

int index = (dispDays ? 1 : 0) | (dispHour ? 2 : 0) | (dispMinute ? 4 : 0);

String[] formats = context.getResources().getStringArray(R.array.alarm_set); return String.format(formats[index], daySeq, hourSeq, minSeq); } }

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DeskClock分析文档

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DeskClock分析文档

AlarmProvider.java

在该类中，创建一个数据库，通过SQLiteOpenHelper/ContentProvider向数据库存储数据 ，在类中重写了boolean Create（），int update（），Cursor query（），String getType（），uri insert（），int delete（）六个方法。

? 定义UriMatcher

private static final UriMatcher sURLMatcher = new UriMatcher( UriMatcher.NO_MATCH); static {

sURLMatcher.addURI(\ALARMS); sURLMatcher.addURI(\ALARMS_ID);

Log.e(\ }

? 创建数据库alarms.db，创建表alarms，定义参数（_id（主键） ,hour,

minutes, daysofweek, alarmtime, enabled, vibrate, message, alert）

private static class DatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = \ private static final int DATABASE_VERSION = 5;

public DatabaseHelper(Context context) {

super(context, DATABASE_NAME, null, DATABASE_VERSION); Log.e(\ }

@Override

public void onCreate(SQLiteDatabase db) { Log.e(\

db.execSQL(\ \ \ \ \ \ \ \ \ \

// insert default alarms

String insertMe = \

\

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DeskClock分析文档

\

\

db.execSQL(insertMe + \ db.execSQL(insertMe + \ }

@Override

public void onUpgrade(SQLiteDatabase db, int oldVersion, int currentVersion) { if (Log.LOGV) Log.v(

\ oldVersion + \

\ db.execSQL(\ onCreate(db); }

}

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DeskClock分析文档

四.设置Alarms属性

settingsActivity类继承PreferenceActivity，也是用存储界面参数的，这个类的作用是储存对alarms设置的属性。

public class SettingsActivity extends PreferenceActivity implements Preference.OnPreferenceChangeListener { //定义参数

private static final int ALARM_STREAM_TYPE_BIT = 1 << AudioManager.STREAM_ALARM;

private static final String KEY_ALARM_IN_SILENT_MODE = \ static final String KEY_ALARM_SNOOZE = \

static final String KEY_VOLUME_BEHAVIOR = \

//onCreate方法 @Override

protected void onCreate(Bundle savedInstanceState) { Log.e(\

super.onCreate(savedInstanceState);

addPreferencesFromResource(R.xml.settings); }

//onResume方法 @Override

protected void onResume() { Log.e(\ super.onResume(); refresh(); }

@Override

public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) { Log.e(\//监听alarm_in_silent_mode

if (KEY_ALARM_IN_SILENT_MODE.equals(preference.getKey())) { Log.e(\

CheckBoxPreference pref = (CheckBoxPreference) preference; int ringerModeStreamTypes = Settings.System.getInt( getContentResolver(),

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