Question

我在Voice Reminder上尝试我的项目。它基于录音并将其设置为闹钟。当闹钟被激活时，我的问题出现了。它被激活了两次。这是我的代码。如果有人可以提供帮助，请随时欢迎。

AudioAppActivity (MainActivity file)

public class AudioAppActivity extends Activity {

private static MediaRecorder mediaRecorder;
private static MediaPlayer mediaPlayer;

private Button recordButton;
private Button playButton;
private Button stopButton;
private Button database;
private String audioFilePath;
private static int c = 0;

private boolean isRecording = false;

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

    // INITIALISATION

    recordButton = (Button) findViewById(R.id.button2);
    playButton = (Button) findViewById(R.id.button1);
    stopButton = (Button) findViewById(R.id.button3);
    database = (Button) findViewById(R.id.button4);

    // FETCHING OF STATIC VALUE OF COUNTER

    SharedPreferences spf = getSharedPreferences("COUNTER_VALUE",
            MODE_PRIVATE);
    c = spf.getInt("counter", 0);

    // CHECKING OF MICROPHONE

    if (!hasMicrophone()) {
        stopButton.setEnabled(false);
        playButton.setEnabled(false);
        recordButton.setEnabled(false);
    } else {
        playButton.setEnabled(false);
        stopButton.setEnabled(false);
        recordButton.setEnabled(true);
    }

    // ON CLICK OF RECORD BUTTON

    recordButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // CREATING DIRECTORY FOR RECORDINGS

            File f = new File(Environment.getExternalStorageDirectory()
                    .getAbsolutePath() + "/Mydir");

            if (!f.exists()) {

                f.mkdir();
            }

            audioFilePath = f.getAbsolutePath() + "/myaudio" + c + ".3gp";
            c = c + 1;

            isRecording = true;

            playButton.setEnabled(false);
            recordButton.setEnabled(false);
            stopButton.setEnabled(true);

            try {

                mediaRecorder = new MediaRecorder();
                mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
                mediaRecorder
                        .setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
                mediaRecorder.setOutputFile(audioFilePath);
                mediaRecorder
                        .setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
                mediaRecorder.prepare();
            } catch (Exception e) {
                e.printStackTrace();
            }

            mediaRecorder.start();

        }

    });

    // ON CLICK OF STOP BUTTON

    stopButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            stopButton.setEnabled(false);
            playButton.setEnabled(true);

            if (isRecording) {
                recordButton.setEnabled(true);
                mediaRecorder.stop();
                mediaRecorder.release();
                mediaRecorder = null;
                isRecording = false;
            } else {
                mediaPlayer.release();
                mediaPlayer = null;
                recordButton.setEnabled(true);
            }

        }
    });

    // ON CLICK OF PLAY BUTTON

    playButton.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            playButton.setEnabled(false);
            recordButton.setEnabled(false);
            stopButton.setEnabled(true);

            try {

                mediaPlayer = new MediaPlayer();
                mediaPlayer.setDataSource(audioFilePath);
                mediaPlayer.prepare();
                mediaPlayer.start();

            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    });

    database.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {

            Intent i = new Intent(AudioAppActivity.this,
                    DatabaseActivity.class);
            startActivity(i);

        }
    });

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

protected boolean hasMicrophone() {
    PackageManager pmanager = this.getPackageManager();
    return pmanager.hasSystemFeature(PackageManager.FEATURE_MICROPHONE);
}

@Override
protected void onDestroy() {

    SharedPreferences sp = this.getSharedPreferences("COUNTER_VALUE",
            MODE_PRIVATE);
    SharedPreferences.Editor spEditor = sp.edit();
    spEditor.putInt("counter", c);
    spEditor.commit();

    super.onDestroy();

}

DatabaseActivity.java

    public class DatabaseActivity extends Activity {

private static MediaPlayer mediaPlayer;
ListView lv;
int i = 0, pos;
String fileName;
List<String> filenames = new ArrayList<String>();
TimePicker tp;
TimePickerDialog tpd;
final static int RQS_1 = 1;

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

    lv = (ListView) findViewById(R.id.listView1);

    File f2 = new File(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/Mydir");

    if (!f2.exists()) {

        f2.mkdir();
    }

    File[] files = f2.listFiles();

    if (files.length > 0) {
        for (File ff : files) {
            filenames.add(ff.getName().toString());
        }

        lv.setAdapter(new ArrayAdapter<String>(DatabaseActivity.this,
                android.R.layout.simple_list_item_1, filenames));
    } else {
        Toast.makeText(DatabaseActivity.this,
                "There are no files...(onCreate)", Toast.LENGTH_LONG)
                .show();
    }

    lv.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View view,
                int position, long arg3) {
            pos = position;
            fileName = lv.getItemAtPosition(pos).toString();

            File f = new File(Environment.getExternalStorageDirectory()
                    .getAbsolutePath() + "/Mydir");

            try {
                mediaPlayer = new MediaPlayer();
                mediaPlayer.setDataSource(f.getAbsolutePath() + "/" + fileName);
                mediaPlayer.prepare();
                mediaPlayer.start();
                Toast.makeText(DatabaseActivity.this, "PLAYING...",
                        Toast.LENGTH_LONG).show();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    });

    lv.setOnItemLongClickListener(new OnItemLongClickListener() {

        @Override
        public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            fileName = lv.getItemAtPosition(pos).toString();
            registerForContextMenu(lv);
            return false;
        }
    });
}

@Override
public void onCreateContextMenu(ContextMenu menu, View v,
        ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    if (v.getId() == R.id.listView1) {
        menu.setHeaderTitle("File Options");
        menu.add(0, 1, 0, "SCHEDULE");
        menu.add(0, 2, 0, "DELETE");
    }
}

@Override
public boolean onContextItemSelected(MenuItem item) {

    int id = item.getItemId();
    String v = lv.getItemAtPosition(pos).toString();
    File f = new File(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/Mydir");
    if (id == 1) {
        openTimePickerDailog();
    }

    else if (id == 2) {
        File file = new File(f.getAbsolutePath() + "/" + v);
        boolean deleted = file.delete();

        if (deleted == true) {
            Toast.makeText(DatabaseActivity.this, "FILE DELETED!!!",
                    Toast.LENGTH_LONG).show();
            Refresh();
        } else {
            Toast.makeText(DatabaseActivity.this, "FILE NOT DELETED!!!",
                    Toast.LENGTH_LONG).show();
        }
    }
    return false;
}

public void openTimePickerDailog() {
    Calendar cal = Calendar.getInstance();
    tpd = new TimePickerDialog(DatabaseActivity.this, settime,
            cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE), false);
    tpd.setTitle("Set Alarm Time");
    tpd.show();
}

OnTimeSetListener settime = new OnTimeSetListener() {

    @Override
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
        Calendar calNow = Calendar.getInstance();
        Calendar calSet = (Calendar) calNow.clone();
        calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
        calSet.set(Calendar.MINUTE, minute);
        calSet.set(Calendar.SECOND, 0);
        calSet.set(Calendar.MILLISECOND, 0);
        if (calSet.compareTo(calNow) <= 0) {
            // Today Set time passed, count to tomorrow
            calSet.add(Calendar.DATE, 1);
        }
        setAlarm(calSet);
    }
};

protected void setAlarm(Calendar calSet) {
    Toast.makeText(
            DatabaseActivity.this,
            "Alarm Received for file:' " + fileName + "' at time "
                    + calSet.getTime(), Toast.LENGTH_LONG).show();

    Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
    intent.putExtra("key", fileName);

    PendingIntent pendingIntent = PendingIntent.getBroadcast(
            getBaseContext(), RQS_1, intent, 0);
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC_WAKEUP, calSet.getTimeInMillis(),
            pendingIntent);
    sendBroadcast(intent);
}

protected void Refresh() {
    lv = (ListView) findViewById(R.id.listView1);

    lv.setAdapter(null);

    File f2 = new File(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/Mydir");

    if (!f2.exists()) {

        f2.mkdir();
    }

    File[] files = f2.listFiles();

    if (files.length > 0) {
        for (File ff : files) {
            filenames.add(ff.getName().toString());
        }

        lv.setAdapter(new ArrayAdapter<String>(DatabaseActivity.this,
                android.R.layout.simple_list_item_1, filenames));
    } else {
        Toast.makeText(DatabaseActivity.this,
                "There are no files...(onResume)", Toast.LENGTH_LONG)
                .show();

    }

    super.onResume();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.database, menu);
    return true;
}

警报接收器

    public class AlarmReceiver extends BroadcastReceiver {

private String filename;
private MediaPlayer mediaPlayer;

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

    filename = intent.getExtras().getString("key");

    File f = new File(Environment.getExternalStorageDirectory()
            .getAbsolutePath() + "/Mydir");

    try {
        mediaPlayer = new MediaPlayer();
        mediaPlayer.setDataSource(f.getAbsolutePath() + "/" + filename);
        mediaPlayer.prepare();
        mediaPlayer.start();
        Toast.makeText(context, "PLAYING...",
                Toast.LENGTH_LONG).show();
    } catch (Exception e) {
        e.printStackTrace();
    }

}

Answer 1

在创建待定意图时尝试使用PendingIntent.FLAG_ONE_SHOT

PendingIntent pendingIntent = PendingIntent.getBroadcast(
        getBaseContext(), RQS_1, intent,  PendingIntent.FLAG_ONE_SHOT);

Answer 2

我遇到了同样的问题而且有点奇怪但是我通过将我的alarmmanager初始化程序从onCreate方法移动到onStart方法来解决它，同时我删除了动态设置我的视图方向的代码行，现在从我的清单中设置它。 xml

警报在android中被调用两次

2 个答案: