? 以下是我發現的幾點鬧鐘中重要的點，分享一下：

? ?（1）在鬧鐘中有AudioManager管理機制，這個機制可以申請和釋放OnAudioFocusChangeListener監聽。

還有mTelephonyManager對象，處理在鬧鐘響的時候，來電鈴聲的切換。

? ?（2）廣播接收鬧鐘，通過廣播啟動AlarmKlaxon這個Service，隱式啟動service：

public static final String ALARM_INTENT_EXTRA = "intent.extra.alarm";

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// Play the alarm alert and vibrate the device.Intent playAlarm = new Intent(Alarms.ALARM_ALERT_ACTION);playAlarm.putExtra(Alarms.ALARM_INTENT_EXTRA, alarm);context.startService(playAlarm);

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???在mainfest中，AlarmKlaxon這個服務的定義如下：

<service android:name="AlarmKlaxon"android:description="@string/alarm_klaxon_service_desc"><intent-filter><action android:name="com.cn.daming.deskclock.ALARM_ALERT" /></intent-filter></service>

這個service做的是允許別的Activity打斷正在響鈴的鈴聲，播放其他的鈴聲，例如，鬧鐘響的時候來電話了。

? ? （3）在listview中包含checkbox，這時候鬧鐘的處理時，activity實現一個OnItemClickListener的監聽，點擊每一項的監聽。然后在checkbox單獨拿出去寫一個類，繼承LinearLayout，重寫setPressed（）這個方法，以實現“當點擊checkbox的時候不觸發parent的click事件”。關鍵代碼如下：

@Overridepublic void setPressed(boolean pressed) {// If the parent is pressed, do not set to pressed.if (pressed && ((View) getParent()).isPressed()) {return;}super.setPressed(pressed);}

下面看看我的程序截圖：

????????????????????紅色圈的圖標為我的鬧鐘。 ? ? ? ? ? ? ?點擊“玲鬧鐘”后的界面

??????????????????????????????????

????????????????????點擊新建鬧鐘出現的界面 ? ? ? ? ? ? ? 設置好時間彈出的toast。

??????????????? ??????????????????

下面我把我的主要入口類的代碼貼出來：

DeskClockMainActivity.Java

package com.cn.daming.deskclock;import java.util.Calendar;import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.graphics.Typeface; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemClickListener; import android.widget.CheckBox; import android.widget.CursorAdapter; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView;public class DeskClockMainActivity extends Activity implements OnItemClickListener{static final String PREFERENCES = "AlarmClock";/** This must be false for production. If true, turns on logging,test code, etc. */static final boolean DEBUG = false;private SharedPreferences mPrefs;private LayoutInflater mFactory;private ListView mAlarmsList;private Cursor mCursor;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//取自定義布局的LayoutInflatermFactory = LayoutInflater.from(this);//取getSharedPreferences中key==“AlarmClock”的值mPrefs = getSharedPreferences(PREFERENCES, 0);//獲取鬧鐘的cursormCursor = Alarms.getAlarmsCursor(getContentResolver());//更新布局界面 updateLayout();}//加載更新界面布局private void updateLayout() {setContentView(R.layout.alarm_clock);mAlarmsList = (ListView) findViewById(R.id.alarms_list);AlarmTimeAdapter adapter = new AlarmTimeAdapter(this, mCursor);mAlarmsList.setAdapter(adapter);mAlarmsList.setVerticalScrollBarEnabled(true);mAlarmsList.setOnItemClickListener(this);mAlarmsList.setOnCreateContextMenuListener(this);View addAlarm = findViewById(R.id.add_alarm);addAlarm.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {addNewAlarm();}});// Make the entire view selected when focused.addAlarm.setOnFocusChangeListener(new View.OnFocusChangeListener() {public void onFocusChange(View v, boolean hasFocus) {v.setSelected(hasFocus);}});ImageButton deskClock =(ImageButton) findViewById(R.id.desk_clock_button);deskClock.setOnClickListener(new View.OnClickListener() {public void onClick(View v) {}});}private void addNewAlarm() {startActivity(new Intent(this, SetAlarm.class));}/*** listview的適配器繼承CursorAdapter* @author wangxianming* 也可以使用BaseAdapter*/private class AlarmTimeAdapter extends CursorAdapter {public AlarmTimeAdapter(Context context, Cursor cursor) {super(context, cursor);}public View newView(Context context, Cursor cursor, ViewGroup parent) {View ret = mFactory.inflate(R.layout.alarm_time, parent, false);DigitalClock digitalClock =(DigitalClock) ret.findViewById(R.id.digitalClock);digitalClock.setLive(false);return ret;}//把view綁定cursor的每一項public void bindView(View view, Context context, Cursor cursor) {final Alarm alarm = new Alarm(cursor);View indicator = view.findViewById(R.id.indicator);// Set the initial resource for the bar image.final ImageView barOnOff =(ImageView) indicator.findViewById(R.id.bar_onoff);barOnOff.setImageResource(alarm.enabled ?R.drawable.ic_indicator_on : R.drawable.ic_indicator_off);// Set the initial state of the clock "checkbox"final CheckBox clockOnOff =(CheckBox) indicator.findViewById(R.id.clock_onoff);clockOnOff.setChecked(alarm.enabled);// Clicking outside the "checkbox" should also change the state.//對checkbox設置監聽，使里外一致indicator.setOnClickListener(new OnClickListener() {public void onClick(View v) {clockOnOff.toggle();updateIndicatorAndAlarm(clockOnOff.isChecked(),barOnOff, alarm);}});DigitalClock digitalClock =(DigitalClock) view.findViewById(R.id.digitalClock);// set the alarm textfinal Calendar c = Calendar.getInstance();c.set(Calendar.HOUR_OF_DAY, alarm.hour);c.set(Calendar.MINUTE, alarm.minutes);digitalClock.updateTime(c);digitalClock.setTypeface(Typeface.DEFAULT);// Set the repeat text or leave it blank if it does not repeat.TextView daysOfWeekView =(TextView) digitalClock.findViewById(R.id.daysOfWeek);final String daysOfWeekStr =alarm.daysOfWeek.toString(DeskClockMainActivity.this, false);if (daysOfWeekStr != null && daysOfWeekStr.length() != 0) {daysOfWeekView.setText(daysOfWeekStr);daysOfWeekView.setVisibility(View.VISIBLE);} else {daysOfWeekView.setVisibility(View.GONE);}// Display the labelTextView labelView =(TextView) view.findViewById(R.id.label);if (alarm.label != null && alarm.label.length() != 0) {labelView.setText(alarm.label);labelView.setVisibility(View.VISIBLE);} else {labelView.setVisibility(View.GONE);}}};//更新checkboxprivate void updateIndicatorAndAlarm(boolean enabled, ImageView bar,Alarm alarm) {bar.setImageResource(enabled ? R.drawable.ic_indicator_on: R.drawable.ic_indicator_off);Alarms.enableAlarm(this, alarm.id, enabled);if (enabled) {SetAlarm.popAlarmSetToast(this, alarm.hour, alarm.minutes,alarm.daysOfWeek);}}/** (non-Javadoc)* @see android.app.Activity#onContextItemSelected(android.view.MenuItem)* 創建上下文菜單*/@Overridepublic boolean onContextItemSelected(final MenuItem item) {final AdapterContextMenuInfo info =(AdapterContextMenuInfo) item.getMenuInfo();final int id = (int) info.id;// Error check just in case.if (id == -1) {return super.onContextItemSelected(item);}switch (item.getItemId()) {case R.id.delete_alarm:// Confirm that the alarm will be deleted.new AlertDialog.Builder(this).setTitle(getString(R.string.delete_alarm)).setMessage(getString(R.string.delete_alarm_confirm)).setPositiveButton(android.R.string.ok,new DialogInterface.OnClickListener() {public void onClick(DialogInterface d,int w) {Alarms.deleteAlarm(DeskClockMainActivity.this, id);}}).setNegativeButton(android.R.string.cancel, null).show();return true;case R.id.enable_alarm:final Cursor c = (Cursor) mAlarmsList.getAdapter().getItem(info.position);final Alarm alarm = new Alarm(c);Alarms.enableAlarm(this, alarm.id, !alarm.enabled);if (!alarm.enabled) {SetAlarm.popAlarmSetToast(this, alarm.hour, alarm.minutes,alarm.daysOfWeek);}return true;case R.id.edit_alarm:Intent intent = new Intent(this, SetAlarm.class);intent.putExtra(Alarms.ALARM_ID, id);startActivity(intent);return true;default:break;}return super.onContextItemSelected(item);}/** (non-Javadoc)* @see android.app.Activity#onCreateContextMenu(android.view.ContextMenu, android.view.View, android.view.ContextMenu.ContextMenuInfo)* 創建菜單*/@Overridepublic void onCreateContextMenu(ContextMenu menu, View view,ContextMenuInfo menuInfo) {// Inflate the menu from xml. getMenuInflater().inflate(R.menu.context_menu, menu);// Use the current item to create a custom view for the header.final AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;final Cursor c =(Cursor) mAlarmsList.getAdapter().getItem((int) info.position);final Alarm alarm = new Alarm(c);// Construct the Calendar to compute the time.final Calendar cal = Calendar.getInstance();cal.set(Calendar.HOUR_OF_DAY, alarm.hour);cal.set(Calendar.MINUTE, alarm.minutes);final String time = Alarms.formatTime(this, cal);// Inflate the custom view and set each TextView's text.final View v = mFactory.inflate(R.layout.context_menu_header, null);TextView textView = (TextView) v.findViewById(R.id.header_time);textView.setText(time);textView = (TextView) v.findViewById(R.id.header_label);textView.setText(alarm.label);// Set the custom view on the menu. menu.setHeaderView(v);// Change the text based on the state of the alarm.if (alarm.enabled) {menu.findItem(R.id.enable_alarm).setTitle(R.string.disable_alarm);}}/** (non-Javadoc)* @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem)* 設置菜單的點擊事件的處理*/@Overridepublic boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {case R.id.menu_item_settings:startActivity(new Intent(this, SettingsActivity.class));return true;case R.id.menu_item_desk_clock://modify by wangxianming in 2012-4-14 // startActivity(new Intent(this, DeskClock.class));return true;case R.id.menu_item_add_alarm:addNewAlarm();return true;default:break;}return super.onOptionsItemSelected(item);}/** (non-Javadoc)* @see android.app.Activity#onCreateOptionsMenu(android.view.Menu)* 創建菜單*/@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.alarm_list_menu, menu);return super.onCreateOptionsMenu(menu);}/** (non-Javadoc)* @see android.widget.AdapterView.OnItemClickListener#onItemClick(android.widget.AdapterView, android.view.View, int, long)* 創建菜單的點擊事件響應*/public void onItemClick(AdapterView<?> adapterView, View v, int pos, long id) {Intent intent = new Intent(this, SetAlarm.class);intent.putExtra(Alarms.ALARM_ID, (int) id);startActivity(intent);}@Overrideprotected void onDestroy() {super.onDestroy();ToastMaster.cancelToast();mCursor.close();} }

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轉載于:https://www.cnblogs.com/zhujiabin/p/6065947.html

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