轻按时如何创建播放音频文件的通知? [英] How can I create a notification that plays an audio file when being tapped?
问题描述
我想显示一个通知,当用户点击它时,应该播放一个声音文件.
I would like to display a notification and when the user taps on it a sound file should be played.
在Android Studio中,我已将文件 test.mp3
复制到文件夹 app \ res \ raw
中.通知是通过以下代码发出的:
In Android Studio I have copied the file test.mp3
into the folder app\res\raw
. The notification is emitted by this code:
Resources resources = getResources();
Uri uri = new Uri.Builder()
.scheme(ContentResolver.SCHEME_ANDROID_RESOURCE)
.authority(resources.getResourcePackageName(R.raw.test))
.appendPath(resources.getResourceTypeName(R.raw.test))
.appendPath(resources.getResourceEntryName(R.raw.test))
.build();
Intent playSoundIntent = new Intent();
playSoundIntent.setAction(android.content.Intent.ACTION_VIEW);
playSoundIntent.setDataAndType(uri, "audio/*");
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
playSoundIntent, 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this,
MainActivity.notificationChannelId)
.setSmallIcon(android.R.drawable.ic_media_play)
.setContentTitle(getResources().getString(R.string.app_name))
.setContentText("Tap to play sound!")
.setContentIntent(pendingIntent)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setAutoCancel(true);
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(12345678, builder.build());
它不能按预期方式工作.显示该通知,如果我点击它,它就会消失(由于 setAutoCancel(true)
).但是我听不到声音.为什么?
It does not work as expected. The notification is displayed and if I tap it, it disappears (because of setAutoCancel(true)
). But I hear no sound. Why?
我如何调试它?
非常感谢!
推荐答案
我通过创建这样的意图来管理它:
I have managed it by creating the intent like this:
Intent playSoundIntent = new Intent(this, PlaySoundActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, playSoundIntent, 0);
并添加活动:
public class PlaySoundActivity extends AppCompatActivity
{
private static MediaPlayer mediaPlayer;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mediaPlayer = MediaPlayer.create(this, R.raw.test);
mediaPlayer.start();
}
@Override
public void onStop()
{
super.onStop();
mediaPlayer.stop();
mediaPlayer.release();
}
}
尽管这行得通,但我仍然对为什么前一种方法行不通感兴趣.我已经看到了很多类似的代码片段.而且我仍然想知道如何调试以前的方法来理解错误.有人可以帮我吗?
Although this works, I am still interested in why the former approach didn't work. I have seen many code snippets like that. And still I wonder how I could debug the former approach to understand the error. Can anybody help me?
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