判断手机是不是有语音识别功能

        PackageManager pm = getPackageManager();        List<ResolveInfo> activities = pm.queryIntentActivities(                new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);        if (activities.size() != 0) {            /*Activity  存在*/        Toast.makeText(AndroidVoiceActivity.this, "Activity  存在", Toast.LENGTH_LONG).show();        } else {            /*  Activity  Not  Found   未判断会抛出ActivityNotFoundException*/        Toast.makeText(AndroidVoiceActivity.this, "Activity  不存在", Toast.LENGTH_LONG).show();        }