使用搜索栏以控制在android的音量？

问题描述

我怎样才能准确地改变我的应用程序中使用搜索栏没有控制我的Andr​​oid设备上的音量的音量按钮音量？我有我的机器人，这就是为什么我要使用一个搜索栏来控制音量的音量键单独的功能。谁能帮帮我吗？

How can I accurately change the volume of my app using a seekbar without controlling the volume by the volume buttons on my android device? I have seperate function on the Volume keys on my android that's why I want to use a seekbar to control the volume. Can Anyone please help me?

推荐答案

请看看下面code。它解决了你的问题。

Please look at below code . It solves your problem.

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class TestExample extends Activity
{
    /** Called when the activity is first created. */

    private SeekBar volumeSeekbar = null;
    private AudioManager audioManager = null;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setVolumeControlStream(AudioManager.STREAM_MUSIC);
        setContentView(R.layout.main);
        initControls();
    }

    private void initControls()
    {
        try
        {
            volumeSeekbar = (SeekBar)findViewById(R.id.seekBar1);
            audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            volumeSeekbar.setMax(audioManager
                    .getStreamMaxVolume(AudioManager.STREAM_MUSIC));
            volumeSeekbar.setProgress(audioManager
                    .getStreamVolume(AudioManager.STREAM_MUSIC));


            volumeSeekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener()
            {
                @Override
                public void onStopTrackingTouch(SeekBar arg0)
                {
                }

                @Override
                public void onStartTrackingTouch(SeekBar arg0)
                {
                }

                @Override
                public void onProgressChanged(SeekBar arg0, int progress, boolean arg2)
                {
                    audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
                            progress, 0);
                }
            });
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

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