Android 闹钟最终版 _Android

我自横刀向天笑，去留肝胆两昆仑。这篇文章主要讲述Android 闹钟最终版相关的知识，希望能为你提供帮助。
以下是我发现的几点闹钟中重要的点，分享一下：
（1）在闹钟中有AudioManager管理机制，这个机制可以申请和释放OnAudioFocusChangeListener监听。
【Android 闹钟最终版】还有mTelephonyManager对象，处理在闹钟响的时候，来电铃声的切换。
（2）广播接收闹钟，通过广播启动AlarmKlaxon这个Service，隐式启动service：
public static final String ALARM_INTENT_EXTRA = "intent.extra.alarm";

// 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);

在mainfest中，AlarmKlaxon这个服务的定义如下：

< 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>

这个service做的是允许别的Activity打断正在响铃的铃声，播放其他的铃声，例如，闹钟响的时候来电话了。
（3）在listview中包含checkbox，这时候闹钟的处理时，activity实现一个OnItemClickListener的监听，点击每一项的监听。然后在checkbox单独拿出去写一个类，继承LinearLayout，重写setPressed（）这个方法，以实现“ 当点击checkbox的时候不触发parent的click事件” 。关键代码如下：

@Override public 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图：
红色圈的图标为我的闹钟。点击“ 玲闹钟” 后的界面

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点击新建闹钟出现的界面设置好时间弹出的toast。

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下面我把我的主要入口类的代码贴出来：
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; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //取自定义布局的LayoutInflater mFactory = LayoutInflater.from(this); //取getSharedPreferences中key==“ AlarmClock” 的值 mPrefs = getSharedPreferences(PREFERENCES, 0); //获取闹钟的cursor mCursor = Alarms.getAlarmsCursor(getContentResolver()); //更新布局界面 updateLayout(); }//加载更新界面布局 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的适配器继承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绑定cursor的每一项 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. //对checkbox设置监听，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 text final 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 label TextView 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checkbox private 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) * 创建上下文菜单 */ @Override public 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) * 创建菜单 */ @Override public 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) * 设置菜单的点击事件的处理 */ @Override public 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) * 创建菜单 */ @Override public 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) * 创建菜单的点击事件响应 */ 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); }@Override protected void onDestroy() { super.onDestroy(); ToastMaster.cancelToast(); mCursor.close(); } }