java - 显示安卓铃声音量

Question

我正在尝试创建一个仅在屏幕上显示音量值的应用程序。下面是我编写的代码，我觉得它应该可以工作，但是当我运行它时，我得到的值是 7，但无论我更改铃声音量多少次都不会改变。任何帮助表示赞赏!谢谢

public class MainActivity extends Activity {

    int myCurrentVolume = 0;
    String myString = "Hello World";
    AudioManager myAudio;


    private TextView myVolumeLevel;

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

        myVolumeLevel = (TextView) this
                .findViewById(R.id.text_VolumeLevel);

        myAudio = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 
        myCurrentVolume = myAudio.getStreamVolume(AudioManager.ADJUST_SAME);


        String myString = String.valueOf(myCurrentVolume);
        myVolumeLevel.setText(myString);

Answer 1

如果你想获得铃声音量，你需要将对getStreamVolume()的调用改成这样:

myCurrentVolume = myAudio.getStreamVolume(AudioManager.STREAM_RING);