Utilizzo di SeekBar per controllare il volume in Android?

Question

Come posso modificare con precisione il volume della mia app utilizzando una barra di ricerca senza controllare il volume tramite i pulsanti del volume sul mio dispositivo Android? Ho una funzione separata sui tasti del volume sul mio Android è per questo che voglio usare una barra di ricerca per controllare il volume. Qualcuno può aiutarmi?

Answer 1

Si prega di guardare sotto il codice. Risolve il tuo problema.

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(); 
     } 
    } 

Answer 2

Questa è una custom View Ho usato per regolare il livello del volume. Funziona facendo scorrere il dito verso l'alto, ma puoi facilmente cambiarlo.

SliderView

public class SliderView extends View implements OnGestureListener, OnTouchListener { 

private int mHeight = 0; 

private int mMaxValue = 16; 
private float mDelta = 0; 
private int mColor = Color.WHITE; 
private GestureDetector mGestureDetector; 

private OnValueChangeListener mListener; 

public SliderView(Context context) { 
    super(context); 
    init(context); 
} 

public SliderView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    init(context); 
} 

public SliderView(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
    init(context); 
} 

@Override 
public boolean onDown(MotionEvent e) { 
    mDelta = 0; 
    return false; 
} 

@Override 
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { 
    return false; 
} 

@Override 
public void onLongPress(MotionEvent e) { 
    mDelta = 0; 
} 

@Override 
public boolean onScroll(MotionEvent event1, MotionEvent event2, float distanceX, float distanceY) { 

    if (mDelta >= 1 || mDelta <= -1) { 
     if (mListener != null) { 
      mListener.onValueChanged((int) mDelta); 
     } 
     mDelta = 0; 
    } else { 
     mDelta += mMaxValue * distanceY/mHeight * 2; 
    } 
    return false; 
} 

@Override 
public void onShowPress(MotionEvent e) { 

} 

@Override 
public boolean onSingleTapUp(MotionEvent e) { 
    return false; 
} 

@Override 
public void onSizeChanged(int w, int h, int oldw, int oldh) { 
    mHeight = getHeight(); 
} 

@Override 
public boolean onTouch(View v, MotionEvent event) { 

    int action = event.getAction(); 
    if (action == MotionEvent.ACTION_DOWN) { 
     v.setBackgroundColor(Color.argb(0x33, Color.red(mColor), Color.green(mColor), 
       Color.blue(mColor))); 
    } else if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) { 
     v.setBackgroundColor(Color.TRANSPARENT); 
    } 
    mGestureDetector.onTouchEvent(event); 
    return true; 
} 

public void setColor(int color) { 
    mColor = color; 
} 

public void setMax(int max) { 
    mMaxValue = max; 
} 

public void setOnValueChangeListener(OnValueChangeListener listener) { 
    mListener = listener; 
} 

private void init(Context context) { 
    setOnTouchListener(this); 
    mGestureDetector = new GestureDetector(context, this); 
    mHeight = getHeight(); 
} 

public interface OnValueChangeListener { 

    void onValueChanged(int value); 
    } 

} 

Usandolo - assicurarsi di implementare OnValueChangeListener.

SliderView mSlider; 
mSlider= (SliderView) findViewById(id); 
mSlider.setOnValueChangeListener(this); 
mSlider.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC)); 

Non è esattamente quello che stai chiedendo, ma dovrebbe sicuramente aiutarti, credo.

Answer 3

@CommonsWare fare in questo modo in https://github.com/commonsguy/cw-omnibus/tree/master/SystemServices/Volume e anche impostare cinque tipi di volumi che utilizzano SeekBar

Handling cinque diversi tipi di volume

/*** 
    Copyright (c) 2008-2012 CommonsWare, LLC 
    Licensed under the Apache License, Version 2.0 (the "License"); you may not 
    use this file except in compliance with the License. You may obtain a copy 
    of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required 
    by applicable law or agreed to in writing, software distributed under the 
    License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
    OF ANY KIND, either express or implied. See the License for the specific 
    language governing permissions and limitations under the License. 

    From _The Busy Coder's Guide to Android Development_ 
    http://commonsware.com/Android 
*/ 

package com.commonsware.android.syssvc.volume; 

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

public class Volumizer extends Activity { 
    SeekBar alarm=null; 
    SeekBar music=null; 
    SeekBar ring=null; 
    SeekBar system=null; 
    SeekBar voice=null; 
    AudioManager mgr=null; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    mgr=(AudioManager)getSystemService(Context.AUDIO_SERVICE); 

    alarm=(SeekBar)findViewById(R.id.alarm); 
    music=(SeekBar)findViewById(R.id.music); 
    ring=(SeekBar)findViewById(R.id.ring); 
    system=(SeekBar)findViewById(R.id.system); 
    voice=(SeekBar)findViewById(R.id.voice); 

    initBar(alarm, AudioManager.STREAM_ALARM); 
    initBar(music, AudioManager.STREAM_MUSIC);//for Volume this is neccessary 
    initBar(ring, AudioManager.STREAM_RING); 
    initBar(system, AudioManager.STREAM_SYSTEM); 
    initBar(voice, AudioManager.STREAM_VOICE_CALL); 
    } 

    private void initBar(SeekBar bar, final int stream) { 
    bar.setMax(mgr.getStreamMaxVolume(stream)); 
    bar.setProgress(mgr.getStreamVolume(stream)); 

    bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { 
     public void onProgressChanged(SeekBar bar, int progress, 
            boolean fromUser) { 
     mgr.setStreamVolume(stream, progress, 
          AudioManager.FLAG_PLAY_SOUND); 
     } 

     public void onStartTrackingTouch(SeekBar bar) { 
     // no-op 
     } 

     public void onStopTrackingTouch(SeekBar bar) { 
     // no-op 
     } 
    }); 
    } 
} 

e per il controllo del volume solo utilizzare solo
music=(SeekBar)findViewById(R.id.music); e initBar(music, AudioManager.STREAM_MUSIC);