前言：
看过了不少安卓闹钟开发的例子，都是点到为止，都不完整，这次整一个看看。
一、闹钟的设置不需要数据库，但是展示闹钟列表的时候需要，所以需要数据库：
代码语言：javascript复制public class MySQLiteOpenHelper extends SQLiteOpenHelper{
public SQLiteDatabase sqlitedb;
@SuppressLint("SdCardPath")
public static String dbPath = "/sdcard/my.db";
public SQLiteDatabase init(){
Log.i("SD卡路径", SdCardUtil.getSdPath());
File file = new File(dbPath);
if(file.exists()){
Log.i("MySQLiteOpenHelper", "数据库已存在");
}
//调用此方法时，判断数据库是否存在，不存在则创建 调用OnCreate方法，存在则不调，直接放回数据库对象
sqlitedb = this.getWritableDatabase();
return sqlitedb;
}
public MySQLiteOpenHelper(Context context) {
super(context, dbPath, null, 1);
}
@Override
public void onCreate(SQLiteDatabase sqLiteDatabase){
}二、闹钟列表需要有增删查询，改的问题再说：
代码语言：javascript复制public class ClockController {
public static void createTable(SQLiteDatabase db){
db.execSQL("CREATE TABLE my_clock ("
" id varchar(16) primary key,"
" clock_time varchar(16),"
" repeat_everyday varchar(2),"
" update_time varchar(16))");
}
@SuppressLint("SimpleDateFormat")
public static String addClock(String dateTime, MySQLiteOpenHelper dbOpenHelper) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
ContentValues values = new ContentValues();
String id = System.currentTimeMillis() "";
values.put("id", id);
values.put("clock_time", dateTime);
values.put("repeat_everyday","NO");
values.put("update_time", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
db.insert("my_clock", null, values);
return id;
}
public static boolean deleteClock(Integer id,MySQLiteOpenHelper dbOpenHelper) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
db.delete("my_clock", "id=?", new String[] { id.toString() });
return true;
}
public static boolean updateClock(Integer id,String isRapeat,MySQLiteOpenHelper dbOpenHelper) {
SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("repeat_everyday", isRapeat);
db.update("my_clock", values,"id=?", new String[] { id.toString() });
return true;
}
public static List<MyClock> getClockList(String queryStr,String[] queryValues,
MySQLiteOpenHelper dbOpenHelper){
SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
Cursor cursor = null;
if(queryStr==null){
cursor = db.query("my_clock", null, null, null, null, null, null);
}
List<MyClock> clockList = new ArrayList<MyClock>();
while (cursor.moveToNext()) {
clockList.add(new MyClock(cursor.getString(cursor.getColumnIndex("id")),
cursor.getString(cursor.getColumnIndex("clock_time")),
cursor.getString(cursor.getColumnIndex("repeat_everyday")),
cursor.getString(cursor.getColumnIndex("update_time"))));
}
return clockList;
}
}三、闹钟的增加即设置闹钟：
代码语言：javascript复制public class ClockActivity extends Activity{
AlarmManager alarmManager = null;
Calendar calendar = Calendar.getInstance();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyApplication.getInstance().addActivity(this);
setContentView(R.layout.activity_clock);
alarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
/*
setRepeating(int type，long startTime，long intervalTime，PendingIntent pi)；
该方法用于设置重复闹钟，第一个参数表示闹钟类型，第二个参数表示闹钟首次执行时间，第三个参数表示闹钟两次执行的间隔时间，第三个参数表示闹钟响应动作。
*/
queryMyClock(null);
}
public void setClock(View v){
queryMyClock(null);
Toast.makeText(WeatherClockActivity.this, "设置闹钟", Toast.LENGTH_SHORT).show();
Dialog dialog = new TimePickerDialog(WeatherClockActivity.this,
new OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker timePicker, int hourOfDay, int minute) {
Calendar c=Calendar.getInstance();//获取日期对象
c.setTimeInMillis(System.currentTimeMillis()); //设置Calendar对象
c.set(Calendar.HOUR_OF_DAY, hourOfDay); //设置闹钟小时数
c.set(Calendar.MINUTE, minute); //设置闹钟的分钟数
c.set(Calendar.SECOND, 0); //设置闹钟的秒数
c.set(Calendar.MILLISECOND, 0); //设置闹钟的毫秒数
MySQLiteOpenHelper sqLiteOpenHelper = new MySQLiteOpenHelper(getApplicationContext());
SQLiteDatabase database = sqLiteOpenHelper.init();
if(!DbUtils.tabIsExist("my_clock", sqLiteOpenHelper)){
ClockController.createTable(database);
}
//String id =
ClockController.addClock(new SimpleDateFormat("HH:mm:dd").format(c.getTime()), sqLiteOpenHelper);
Intent intent = new Intent(WeatherClockActivity.this, AlarmReceiver.class); //创建Intent对象
// intent.setFlags(Integer.parseInt(id));//作为取消时候的标识
PendingIntent pi = PendingIntent.getBroadcast(WeatherClockActivity.this, 0,
intent, PendingIntent.FLAG_CANCEL_CURRENT); //创建PendingIntent
//设置一次性闹钟，第一个参数表示闹钟类型，第二个参数表示闹钟执行时间，第三个参数表示闹钟响应动作。
if(c.getTimeInMillis() < System.currentTimeMillis()){
Log.i("clock", "设置时间要推迟24小时,不然立刻会响");
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis() 24*60*60*1000, pi);
}else{
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pi); //设置闹钟，当前时间就唤醒
}
queryMyClock(null);
Toast.makeText(WeatherClockActivity.this, "闹钟设置成功", Toast.LENGTH_LONG).show();//提示用户
}
},
calendar.get(Calendar.HOUR_OF_DAY),
calendar.get(Calendar.MINUTE),
false);
dialog.show();
}
public void queryMyClock(View v){
MySQLiteOpenHelper sqLiteOpenHelper = new MySQLiteOpenHelper(getApplicationContext());
SQLiteDatabase database = sqLiteOpenHelper.init();
if(!DbUtils.tabIsExist("my_clock", sqLiteOpenHelper)){
ClockController.createTable(database);
}
ListView listView = (ListView)findViewById(R.id.clocklist);
SimpleAdapter adapter = new SimpleAdapter(getApplicationContext(),
getClockList(),
R.layout.my_clock_list,
new String[]{"clock_time",},
new int[]{R.id.my_clock});
listView.setAdapter(adapter);
}
public List<? extends Map<String, ?>> getClockList(){
MySQLiteOpenHelper db = new MySQLiteOpenHelper(this);
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
Map<String, Object> map = null;
List<MyClock> clocks = ClockController.getClockList(null, null, db);
for (MyClock myClock : clocks) {
map = new HashMap<String, Object>();
map.put("clock_time", myClock.getClock_time());
list.add(map);
}
return list;
}
}1、布局文件：
代码语言：javascript复制<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<Button
android:id="@ id/setclock"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="@string/setclock"
android:onClick="setClock"
android:layout_weight="1"
/>
</LinearLayout>
<ListView
android:id="@ id/clocklist"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
>
</ListView>
</LinearLayout>2、首页展示已设置过的闹钟列表：
1、首先需要判断要查询的表是否存在，不存在则需要创建，判断表是否存在的方法如下：
代码语言：javascript复制public class DbUtils {
/**
* 判断某张表是否存在
* @param tabName 表名
* @return
*/
public static boolean tabIsExist(String tabName,MySQLiteOpenHelper dbHelper){
boolean result = false;
if(tabName == null){
return false;
}
SQLiteDatabase db = null;
Cursor cursor = null;
try {
db = dbHelper.getReadableDatabase();//此this是继承SQLiteOpenHelper类得到的
String sql = "select count(*) as c from sqlite_master where type ='table' and name ='" tabName.trim() "'";
cursor = db.rawQuery(sql, null);
if(cursor.moveToNext()){
int count = cursor.getInt(0);
if(count>0){
result = true;
}
}
} catch (Exception e) {
LogUtil.initData("判断表是否存在出现异常", "log.txt");
}
return result;
}
2、列表的展示选择使用适配器，以上代码使用第一种方法：
代码语言：javascript复制 SimpleAdapter adapter = new SimpleAdapter(getApplicationContext(),
getClockList(),
R.layout.my_clock_list,
new String[]{"clock_time",},
new int[]{R.id.my_clock});
getClockList方法返回的是一个List类型,将一个Map类型放置其中，通过key值去填充不同view。具体看代码实现！适配ListView的布局文件：
代码语言：javascript复制<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@ id/my_clock"
android:layout_height="wrap_content"
android:layout_width="match_parent"
/>
</LinearLayout>另外，适配器还有第二种实现：以下是一个例子，与此代码无关
代码语言：javascript复制 public class MyAdapter extends BaseAdapter{
public List<Object> list;
public Context context;
public WearthAdapter(List<Object> list,Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
TextView t1 = null,t2=null,t3=null,t4=null,t5=null;
if(view==null){
view = LayoutInflater.from(context).inflate(R.layout.weather_day, parent);
t1 = (TextView)findViewById(R.id.w_day);
t2 = (TextView)findViewById(R.id.w_cond);
t3 = (TextView)findViewById(R.id.w_wind);
t4 = (TextView)findViewById(R.id.max_tmp);
t5 = (TextView)findViewById(R.id.min_tmp);
}
t1.setText("1");
t2.setText("2");
t3.setText("3");
t4.setText("4");
t5.setText("5");
return view;
}
}3、闹钟的设置：
调用TimePickerDialog实现，这是一个时间选择器，通过监听其选择的时间进行闹钟设置；
闹钟设置的主要代码如下：
1.获取系统服务：
alarmManager=(AlarmManager)getSystemService(Context.ALARM_SERVICE);
2. 创建PendingIntent，其中AlarmReceiver.class是闹钟触发的实现动作。
Intent intent = new Intent(ClockActivity.this, AlarmReceiver.class); //创建Intent对象 PendingIntent pi = PendingIntent.getBroadcast(WeatherClockActivity.this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
3、 //设置闹钟，当前时间就唤醒
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pi);
4、闹钟触发是震动和响铃，在 AlarmReceiver中实现：
代码语言：javascript复制import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.os.Vibrator;
import android.util.Log;
public class AlarmReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
Log.i("clock", "闹钟响了........");
Vibrator vibrator = (Vibrator)context.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(10000);
AudioManager audioManager
= (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);
audioManager.setStreamVolume(AudioManager.RINGER_MODE_NORMAL, 5, 0);
}
}结束语：
有待改进！
