android - 待定 Intent 立即触发

Question

我正在尝试制作一个应用程序，允许用户使用两个 TimePickers 输入两次，并且手机将在这些时间之间设置为静音。我正在使用 PendingIntent 和 AlarmManager 在用户选择的时间触发 BroadcastReceiver。目前，当用户单击保存按钮时，它会立即将手机设置为静音。然后出现我的“已安排警报” toast ，我的“已接收广播”出现两次，但此后它什么也没做。

这是我的主要 Activity 代码:

public class MainActivity extends AppCompatActivity {

AlarmManager alarm;
TimePicker timePickerStart;
TimePicker timePickerEnd;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    timePickerStart = (TimePicker)findViewById(R.id.timePickerStart);
    timePickerStart.setIs24HourView(true);
    timePickerEnd = (TimePicker)findViewById(R.id.timePickerEnd);
    timePickerEnd.setIs24HourView(true);

}


//method is called when save button is clicked
public void setAlarm(View view) {
    Calendar calendarStart;
    Calendar calendarEnd;

    calendarStart = Calendar.getInstance();
    calendarEnd = Calendar.getInstance();


    //Set calendars to the times in both TimePickers
    calendarStart.set(Calendar.YEAR, Calendar.MONTH, Calendar.DAY_OF_MONTH, timePickerStart.getCurrentHour(), timePickerStart.getCurrentMinute());
    long startTimeMillis = calendarStart.getTimeInMillis();

    calendarEnd.set(Calendar.YEAR, Calendar.MONTH, Calendar.DAY_OF_MONTH, timePickerEnd.getCurrentHour(), timePickerEnd.getCurrentMinute());
    long endTimeMillis = calendarEnd.getTimeInMillis();



    //create an intent and set the class that will be triggered by the intent
    Intent intent = new Intent(MainActivity.this, Receiver.class);
    PendingIntent pIntent = null;
    pIntent = PendingIntent.getBroadcast(this, 123, intent, PendingIntent.FLAG_UPDATE_CURRENT);


    //create alarm manager
    alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    //set alarms to go off at the time specified by the timePickers
    alarm.set(AlarmManager.RTC_WAKEUP, calendarStart.getTimeInMillis(), pIntent);
    alarm.set(AlarmManager.RTC_WAKEUP, calendarEnd.getTimeInMillis(), pIntent);

    //Toast for feedback
    Toast.makeText(this, "Alarm Scheduled", Toast.LENGTH_SHORT).show();

}

这是我的广播接收器:

public class Receiver extends BroadcastReceiver {

AudioManager audioManager;
int modeNum;


@Override
public void onReceive(Context context, Intent intent) {

    //toast for feedback
    Toast.makeText(context, "Broadcast Received", Toast.LENGTH_SHORT).show();


    audioManager = (AudioManager)context.getSystemService(Context.AUDIO_SERVICE);

    modeNum = audioManager.getRingerMode();
    if (modeNum == 0) {
        audioManager.setRingerMode(2);
    } else {
        audioManager.setRingerMode(0);
    }
}

这是我的 list :

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <receiver android:name=".Receiver"></receiver>
</application>

Answer 1

你有多个问题。

首先，您尝试创建两个具有相同 PendingIntent 的警报。这是行不通的。您的第二个报警请求将取消第一个。您需要 distinct PendingIntent 对象，这意味着由 PendingIntent 对象包裹的完全不同的 Intent 对象，或者使用两个123 的不同值。

其次，您对Calendar 的set() 调用不正确。例如，在这两个地方，您的第一个参数都应该是年份。您传递的是 Calendar.YEAR，即 1，而不是 2015。