头部的Angular Dynamic meta标签(Angular Dynamic meta tags in head)

 终于在我挠了头两天之后我终于做到了。 对于那些想要实现这样的但却无法实现的人来说，这里是代码 
 
public void speak(final String talk) throws InterruptedException {
    final AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    int ringVolume = audioManager
            .getStreamVolume(AudioManager.STREAM_RING);
    int musicVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    currentRingVolume = ringVolume;

    musicVolume = (int) ((musicVolume * seekbarValue) / 100);

    if (PauseRingtone == true) {
        audioManager.setStreamVolume(AudioManager.STREAM_RING, 1,
                AudioManager.FLAG_SHOW_UI);
    } else {
        audioManager.setStreamVolume(AudioManager.STREAM_RING,
                ringVolume, AudioManager.FLAG_SHOW_UI);
    }

    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, musicVolume, 0);

    int result = tts
            .setOnUtteranceProgressListener(new UtteranceProgressListener() {

                @Override
                public void onStart(String utteranceId) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onError(String utteranceId) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onDone(String utteranceId) {
                    // TODO Auto-generated method stub
                    System.out.println("done");
                    audioManager.setStreamVolume(AudioManager.STREAM_RING,
                            currentRingVolume, 0);
                }
            });
    HashMap<String, String> params = new HashMap<String, String>();
    params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "stringId");
    tts.speak(talk, TextToSpeech.QUEUE_FLUSH, params);
    System.out.println("speaking after tts is over" + talk + " " + result);

}
 
 解释： -  
 
 ringVolume - 获取手机中设置的铃声 .ie铃声音量的当前音量。 
 
 musicVolume - 获取当前音乐的音量 
 
 currentRingVolume只保留ringVolume 。 
 
 注意 - STREAM_RING和STREAM_MUSIC是不同的东西。 看到 
 
 现在基本的想法是在TTS讲话时将ringtone mute ，然后将其设置为之前的值。 
 
 seekBarValue - 是我的SeekBar ，它描绘了音乐音量的TTS音量，是可选的。 
 
 PauseRingtone - 是一个CheckBox Preference ，用于检查我们是否要在讲话时暂停铃声。 如果为true则将AudioManager.STREAM_RING设置为1即vibrate其他ringVolume即Phone Value ，因此TTS和Ringtone播放。 
 
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,musicVolume, 0) 
 
 将TTS的音量设置为musicVolume 。 在TTS完成发言之后，即在onDone()我们使用currentRingVolume将Ringtone的音量设置回ringVolume 。 
 
 如果我的回答有助于标记我的答案有用。 

Finally after scratching my head for two days i finally did it. For all those who want to implement something like this but are unable to do so here is the code 
 
public void speak(final String talk) throws InterruptedException {
    final AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
    int ringVolume = audioManager
            .getStreamVolume(AudioManager.STREAM_RING);
    int musicVolume = audioManager.getStreamVolume(AudioManager.STREAM_MUSIC);
    currentRingVolume = ringVolume;

    musicVolume = (int) ((musicVolume * seekbarValue) / 100);

    if (PauseRingtone == true) {
        audioManager.setStreamVolume(AudioManager.STREAM_RING, 1,
                AudioManager.FLAG_SHOW_UI);
    } else {
        audioManager.setStreamVolume(AudioManager.STREAM_RING,
                ringVolume, AudioManager.FLAG_SHOW_UI);
    }

    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, musicVolume, 0);

    int result = tts
            .setOnUtteranceProgressListener(new UtteranceProgressListener() {

                @Override
                public void onStart(String utteranceId) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onError(String utteranceId) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onDone(String utteranceId) {
                    // TODO Auto-generated method stub
                    System.out.println("done");
                    audioManager.setStreamVolume(AudioManager.STREAM_RING,
                            currentRingVolume, 0);
                }
            });
    HashMap<String, String> params = new HashMap<String, String>();
    params.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, "stringId");
    tts.speak(talk, TextToSpeech.QUEUE_FLUSH, params);
    System.out.println("speaking after tts is over" + talk + " " + result);

}
 
explaination :-
 
ringVolume - gets the current volume of the ringtone .i.e ringtone volume set in the phone.
 
musicVolume - gets the current volume of the music
 
currentRingVolume just retains the ringVolume.
 
Note- STREAM_RING and STREAM_MUSIC are different things. See 
 
Now the basic idea is to mute the ringtone while TTS is speaking and then set it to previous value.
 
seekBarValue- is my SeekBar which depicts the level of the TTS volume w.r.t musicVolume and is optional.
 
PauseRingtone- is a CheckBox Preference which checks whether we want to pause ringtone while speaking. If true is sets the AudioManager.STREAM_RING to 1 i.e. vibrate else ringVolume i.e. Phone Value, so both TTS and Ringtone play at the same time.
 
audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,musicVolume, 0) 
 
sets the volume of TTS to musicVolume. After TTS has completed speaking i.e. in onDone() we set the volume of Ringtone back to the ringVolume using currentRingVolume.
 
If my answer helped mark my answer useful.