java - 如何停止触发警报的响铃？

这是MainActivity.java

package com.example.quizalarm;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.TimePickerDialog;
import android.content.Intent;
import android.os.Bundle;
import android.text.format.DateFormat;
import android.view.View;
import android.widget.Button;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Calendar;

import static android.app.PendingIntent.getBroadcast;

public class MainActivity extends AppCompatActivity{

    int nHour1, nHour2, nHour3, nHour4, nMinute1, nMinute2, nMinute3, nMinute4;
    Calendar cal;
    AlarmManager alarmMgr;
    PendingIntent alarmIntent;
    Intent intent;
    Button editButton, infoButton, stopButton, editAlarm1, editAlarm2, editAlarm3, editAlarm4;
    Switch alarmSwitch1, alarmSwitch2, alarmSwitch3, alarmSwitch4;
    TextView alarmText1, alarmText2, alarmText3, alarmText4;

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

        editButton = findViewById(R.id.editButton);
        infoButton = findViewById(R.id.infoButton);
        stopButton = findViewById(R.id.stopButton);
        alarmSwitch1 = findViewById(R.id.alarmSwitch1);
        alarmSwitch2 = findViewById(R.id.alarmSwitch2);
        alarmSwitch3 = findViewById(R.id.alarmSwitch3);
        alarmSwitch4 = findViewById(R.id.alarmSwitch4);
        alarmText1 = findViewById(R.id.alarmText1);
        alarmText2 = findViewById(R.id.alarmText2);
        alarmText3 = findViewById(R.id.alarmText3);
        alarmText4 = findViewById(R.id.alarmText4);
        editAlarm1 = findViewById(R.id.editAlarm1);
        editAlarm2 = findViewById(R.id.editAlarm2);
        editAlarm3 = findViewById(R.id.editAlarm3);
        editAlarm4 = findViewById(R.id.editAlarm4);


        stopButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                stopRinging(1);
            }
        });
        editButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (editAlarm1.getVisibility() == View.VISIBLE) {
                    editAlarm1.setVisibility(View.INVISIBLE);
                    editAlarm2.setVisibility(View.INVISIBLE);
                    editAlarm3.setVisibility(View.INVISIBLE);
                    editAlarm4.setVisibility(View.INVISIBLE);
                    editButton.setText("EDIT");
                } else {
                    editAlarm1.setVisibility(View.VISIBLE);
                    editAlarm2.setVisibility(View.VISIBLE);
                    editAlarm3.setVisibility(View.VISIBLE);
                    editAlarm4.setVisibility(View.VISIBLE);
                    editButton.setText("DONE");
                }
            }
        });

        infoButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                openDialog();
            }
        });


        alarmSwitch1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (alarmSwitch1.isChecked()) {
                    Toast.makeText(MainActivity.this, "Alarm 1 Activated", Toast.LENGTH_SHORT).show();
                    startAlarm(1, nHour1, nMinute1);
                    editAlarm1.setClickable(false);
                } else {
                    Toast.makeText(MainActivity.this, "Alarm 1 Deactivated", Toast.LENGTH_SHORT).show();
                    cancelAlarm(1);
                    editAlarm1.setClickable(true);
                }
            }
        });

        alarmSwitch2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (alarmSwitch2.isChecked()) {
                    Toast.makeText(MainActivity.this, "Alarm 2 Activated", Toast.LENGTH_SHORT).show();
                    startAlarm(2, nHour2, nMinute2);
                    editAlarm2.setClickable(false);
                } else {
                    Toast.makeText(MainActivity.this, "Alarm 2 Deactivated", Toast.LENGTH_SHORT).show();
                    cancelAlarm(2);
                    editAlarm2.setClickable(true);
                }
            }
        });

        alarmSwitch3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (alarmSwitch3.isChecked()) {
                    Toast.makeText(MainActivity.this, "Alarm 3 Activated", Toast.LENGTH_SHORT).show();
                    startAlarm(3, nHour3, nMinute3);
                    editAlarm3.setClickable(false);
                } else {
                    Toast.makeText(MainActivity.this, "Alarm 3 Deactivated", Toast.LENGTH_SHORT).show();
                    cancelAlarm(3);
                    editAlarm3.setClickable(true);
                }
            }
        });

        alarmSwitch4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (alarmSwitch4.isChecked()) {
                    Toast.makeText(MainActivity.this, "Alarm 4 Activated", Toast.LENGTH_SHORT).show();
                    startAlarm(4, nHour4, nMinute4);
                    editAlarm4.setClickable(false);
                } else {
                    Toast.makeText(MainActivity.this, "Alarm 4 Deactivated", Toast.LENGTH_SHORT).show();
                    cancelAlarm(4);
                    editAlarm4.setClickable(true);
                }
            }
        });
    }

    public void setTime1(View v) {
        cal = Calendar.getInstance();
        TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                nHour1 = hourOfDay;
                nMinute1 = minute;
                updateAlarmText(nHour1, nMinute1, alarmText1);
            }
        }, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), DateFormat.is24HourFormat(getApplication()));
        timePickerDialog.show();
    }

    public void setTime2(View v) {
        cal = Calendar.getInstance();
        TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                nHour2 = hourOfDay;
                nMinute2 = minute;
                updateAlarmText(nHour2, nMinute2, alarmText2);
            }
        }, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), DateFormat.is24HourFormat(getApplication()));
        timePickerDialog.show();
    }

    public void setTime3(View v) {
        cal = Calendar.getInstance();
        TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                nHour3 = hourOfDay;
                nMinute3 = minute;
                updateAlarmText(nHour3, nMinute3, alarmText3);
            }
        }, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), DateFormat.is24HourFormat(getApplication()));
        timePickerDialog.show();
    }

    public void setTime4(View v) {
        cal = Calendar.getInstance();
        TimePickerDialog timePickerDialog = new TimePickerDialog(this, new TimePickerDialog.OnTimeSetListener() {
            @Override
            public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                nHour4 = hourOfDay;
                nMinute4 = minute;
                updateAlarmText(nHour4, nMinute4, alarmText4);
            }
        }, cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), DateFormat.is24HourFormat(getApplication()));
        timePickerDialog.show();

    }

    public void startAlarm(int requestCode, int nHour, int nMinute) {
        intent = new Intent(this, AlarmReceiver.class);
        alarmIntent = getBroadcast(this.getApplicationContext(), requestCode, intent, 0);
        alarmMgr = (AlarmManager) getSystemService(ALARM_SERVICE);
        cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, nHour);
        cal.set(Calendar.MINUTE, nMinute);
        cal.set(Calendar.SECOND, 0);

        if (cal.before(Calendar.getInstance())){
            cal.add(Calendar.DATE, 1);
        }

        assert alarmMgr != null;
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
            alarmMgr.setExact(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmIntent);
        } else {
            alarmMgr.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), alarmIntent);
        }
    }

    public void cancelAlarm(int requestCode) {
        intent = new Intent(this, AlarmReceiver.class);
        alarmIntent = PendingIntent.getBroadcast(this.getApplicationContext(), requestCode, intent, 0);
        alarmMgr = (AlarmManager) getSystemService(ALARM_SERVICE);

        assert alarmMgr != null;
        alarmMgr.cancel(alarmIntent);
    }
    public void stopRinging(int requestCode){
        intent = new Intent(this, AlarmReceiver.class);
        alarmIntent = PendingIntent.getBroadcast(this.getApplicationContext(), requestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);
    }

    public void openDialog(){
        Dialog dialog = new Dialog();
        dialog.show(getSupportFragmentManager(), "dialog");
    }

    public void updateAlarmText (int nHour, int nMinute, TextView alarmText) {
        String timeTextHour = "";
        String timeTextMinute = "";
        if (nHour == 0){
            timeTextHour = "12";
        }
        if (nHour <= 12 && nHour != 0) {
            timeTextHour = String.valueOf(nHour);
        }
        if (nHour > 12) {
            timeTextHour = String.valueOf(nHour - 12);
        }
        if (nMinute < 10) {
            timeTextMinute += "0" + nMinute;
        } else {
            timeTextMinute = String.valueOf(nMinute);
        }
        if (nHour < 12){
            alarmText.setText(timeTextHour + ":" + timeTextMinute + " AM");
        } else {
            alarmText.setText(timeTextHour + ":" + timeTextMinute + " PM");
        }
    }
}

这是AlarmReceiver.java

package com.example.quizalarm;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Uri alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        Ringtone r = RingtoneManager.getRingtone(context, alarmUri);
        if (r.isPlaying()) {
            r.stop();
        } else {
            r.play();
        }
    }
}

这是AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    package="com.example.quizalarm">

    <application
        android:fullBackupContent="@xml/backup_descriptor"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme"
        tools:ignore="GoogleAppIndexingWarning">
        <activity android:name=".QuizActivity"/>
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <receiver android:name=".AlarmReceiver" />
    </application>

</manifest>

我的问题是在stopRinging（）方法中。我不知道如何停止触发警报的响铃。我尝试在stopRinging（）方法中调用AlarmReceiver，以便它将执行r.stop（），但它不起作用，但仍在响铃。停止响铃的正确方法是什么？

最佳答案

您看到这个reply

 public void setAlarm(Context context)
    {
        AlarmManager am =( AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        Intent i = new Intent(context, Alarm.class);
        PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi); // Millisec * Second * Minute
    }

    public void cancelAlarm(Context context)
    {
        Intent intent = new Intent(context, Alarm.class);
        PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        alarmManager.cancel(sender);
    }