Android 各音量间的关系分离,以及控制Mute的关系

由于目前的Android系统如果系统的SYSTEM(STREAM_SYSTEM)中的音量设置或者调节为0,相关的STREAM_*的音量也会被Mute住,比如说,我现在的系统将对应的STREAM_SYSTEM和STREAM_RING/STREAM_NOTIFICATION在Mute功能方面绑定的,如果我将STREAM_SYSTEM的volume调节为0,那么Android系统会将STREAM_SYSTEM这个音量MUTE,记住MUTE住和volume为0是两回事,对应的volume=0,依然能够听到声音,只是非常的小而已,但是如果是MUTE了,无论volume是否为0,均在听不到声音,只是现在Android系统在当使用者将STREAM_SYSTEM调节为0时,会开启Mute功能,将STREAM_SYSTEM种类的彻底MUTE住,另外RING/NOTIFICATION是两关相关的,所以他们也会被MUTE住,具体参看下面的程序:

<0> : 修改的文件名大致在./framework/base/media/java/android/media/AudioService.java,路径可能有不正确,但是修改的文件是AudioService.java

<1> :现将各自的关系分离开:

private final int[] STREAM_VOLUME_ALIAS = new int[] {
        AudioSystem.STREAM_VOICE_CALL,      // STREAM_VOICE_CALL
        AudioSystem.STREAM_SYSTEM,            // STREAM_SYSTEM
        //--- AudioSystem.STREAM_RING,            // STREAM_SYSTEM
        AudioSystem.STREAM_RING,            // STREAM_RING
        AudioSystem.STREAM_MUSIC,           // STREAM_MUSIC
        AudioSystem.STREAM_ALARM,           // STREAM_ALARM
        AudioSystem.STREAM_NOTIFICATION,            // STREAM_NOTIFICATION
        //--- AudioSystem.STREAM_RING,            // STREAM_NOTIFICATION
        AudioSystem.STREAM_BLUETOOTH_SCO,   // STREAM_BLUETOOTH_SCO
        AudioSystem.STREAM_SYSTEM_ENFORCED,            // STREAM_SYSTEM_ENFORCED
        //--- AudioSystem.STREAM_RING,            // STREAM_SYSTEM_ENFORCED
        AudioSystem.STREAM_DTMF,            // STREAM_DTMF
        //--- AudioSystem.STREAM_RING,            // STREAM_DTMF
        AudioSystem.STREAM_TTS,            // STREAM_TTS
        //--- AudioSystem.STREAM_MUSIC            // STREAM_TTS
    };
    private final int[] STREAM_VOLUME_ALIAS_NON_VOICE = new int[] {
        AudioSystem.STREAM_VOICE_CALL,      // STREAM_VOICE_CALL
        AudioSystem.STREAM_MUSIC,           // STREAM_SYSTEM
        AudioSystem.STREAM_RING,            // STREAM_RING
        AudioSystem.STREAM_MUSIC,           // STREAM_MUSIC
        AudioSystem.STREAM_ALARM,           // STREAM_ALARM
        AudioSystem.STREAM_NOTIFICATION,            // STREAM_NOTIFICATION
        //AudioSystem.STREAM_RING,            // STREAM_NOTIFICATION
        AudioSystem.STREAM_BLUETOOTH_SCO,   // STREAM_BLUETOOTH_SCO
        AudioSystem.STREAM_MUSIC,           // STREAM_SYSTEM_ENFORCED
        AudioSystem.STREAM_MUSIC,           // STREAM_DTMF
        AudioSystem.STREAM_MUSIC            // STREAM_TTS
    };

<2> : 修改private void readPersistedSettings()里面的"或"关系,将RING/NOTIFICATION将其不要跟随STREAM_SYSTEM一起MUTE,只是MUTE STREAM_SYSTEM一个就好了,总共在这个方法中修改三处:

下面有两处:

// make sure settings for ringer mode are consistent with device type: non voice capable
            // devices (tablets) include media stream in silent mode whereas phones don't.
            mRingerModeAffectedStreams = Settings.System.getIntForUser(cr,
                    Settings.System.MODE_RINGER_STREAMS_AFFECTED,
                    (/*(1 << AudioSystem.STREAM_RING)/*|(1 << AudioSystem.STREAM_NOTIFICATION)|*/
                     (1 << AudioSystem.STREAM_SYSTEM)|(1 << AudioSystem.STREAM_SYSTEM_ENFORCED)),
                     UserHandle.USER_CURRENT);

            // ringtone, notification and system streams are always affected by ringer mode
            mRingerModeAffectedStreams |= /*(1 << AudioSystem.STREAM_RING)|
                                            (1 << AudioSystem.STREAM_NOTIFICATION)|*/
                                            (1 << AudioSystem.STREAM_SYSTEM);

第三处:

// only effort system itself
        mMuteAffectedStreams = System.getIntForUser(cr,
                System.MUTE_STREAMS_AFFECTED,
                (/*(1 << AudioSystem.STREAM_MUSIC)|
                 (1 << AudioSystem.STREAM_RING)|*/
                 (1 << AudioSystem.STREAM_SYSTEM)),
                 UserHandle.USER_CURRENT);

其实我还修改了另外一个方法public void setStreamMute(int streamType, boolean state, IBinder cb)里面的内容:

/** @see AudioManager#setStreamMute(int, boolean) */
    public void setStreamMute(int streamType, boolean state, IBinder cb) {

    if(streamType==AudioManager.STREAM_RING || streamType==AudioManager.STREAM_NOTIFICATION){

        return ;    

    }

        if (isStreamAffectedByMute(streamType)) {
            mStreamStates[streamType].mute(cb, state);
        }
    }

我增加了三行,其实我个人觉得,我前面分离的它们所有者的关系,这一步应该不需要了,但是我为了以防万一,我还是在它准备调用mute功能里面再次做了一次检查,其他它下面的isStreamAffectedByMute(streamType)条件就可以判断了.当然反过来想一想,如果我没有修改前面三处,直接在这里增加的三行同样可以摆平MUTE功能不会施加在RING和NOTIFICATION上.当然我的Android系统被改成RING/NOTIFICATION的volume大小始终保持一致了,所以同样还是要修改前面3点,保证所有的STREAM_**不会被其他的干扰.

修改完以后,build一下,生成framework.jar,放到系统里面去,发现还是不行,没有达到目的,但是RING/NOTIFICATION两者的关系是分开了,但是当STREAM_SYSTEM调节为0时,还是会MUTE住RING/NOTIFICATION两个音量,经过查找,发现还需要修改一个文件,不过这个文件时SettingsProvider.apk工程中的.修改如下:

路径大概在./framework/base/packages/SettingsProvider/DatabaseHelper.java下,修改DatabaseHelper.java文件,修改的内容如下:

/**
     * Loads the default volume levels. It is actually inserting the index of
     * the volume array for each of the volume controls.
     *
     * @param db the database to insert the volume levels into
     */
    private void loadVolumeLevels(SQLiteDatabase db) {
        SQLiteStatement stmt = null;
        try {
            stmt = db.compileStatement("INSERT OR IGNORE INTO system(name,value)"
                    + " VALUES(?,?);");

            loadSetting(stmt, Settings.System.VOLUME_MUSIC,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_MUSIC]);
            loadSetting(stmt, Settings.System.VOLUME_RING,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_RING]);
            loadSetting(stmt, Settings.System.VOLUME_SYSTEM,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_SYSTEM]);
            loadSetting(
                    stmt,
                    Settings.System.VOLUME_VOICE,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_VOICE_CALL]);
            loadSetting(stmt, Settings.System.VOLUME_ALARM,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_ALARM]);
            loadSetting(
                    stmt,
                    Settings.System.VOLUME_NOTIFICATION,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_NOTIFICATION]);
            loadSetting(
                    stmt,
                    Settings.System.VOLUME_BLUETOOTH_SCO,
                    AudioManager.DEFAULT_STREAM_VOLUME[AudioManager.STREAM_BLUETOOTH_SCO]);

            // By default:
            // - ringtones, notification, system and music streams are affected by ringer mode
            // on non voice capable devices (tablets)
            // - ringtones, notification and system streams are affected by ringer mode
            // on voice capable devices (phones)
            int ringerModeAffectedStreams = /*(1 << AudioManager.STREAM_RING) |
                                            (1 << AudioManager.STREAM_NOTIFICATION) |*/
                                            (1 << AudioManager.STREAM_SYSTEM) |
                                            (1 << AudioManager.STREAM_SYSTEM_ENFORCED);
            if (!mContext.getResources().getBoolean(
                    com.android.internal.R.bool.config_voice_capable)) {
                ringerModeAffectedStreams |= (1 << AudioManager.STREAM_MUSIC);
            }
            loadSetting(stmt, Settings.System.MODE_RINGER_STREAMS_AFFECTED,
                    ringerModeAffectedStreams);

            loadSetting(stmt, Settings.System.MUTE_STREAMS_AFFECTED,
                    ((1 << AudioManager.STREAM_MUSIC) |
                     /*(1 << AudioManager.STREAM_RING) |
                     (1 << AudioManager.STREAM_NOTIFICATION) |*/
                     (1 << AudioManager.STREAM_SYSTEM)));
        } finally {
            if (stmt != null) stmt.close();
        }

        loadVibrateWhenRingingSetting(db);
    }

注意上面的几个<<运算,将其中RING/NOTIFICATION去掉就可以了.

让后再build一次,将会生成SettingsProvider.apk,将其放到系统里面,重启再试一下,结果发现还是不行,晕吧.

通过终端进入,将系统的/data/*下所有的数据删除,然后再重启一下系统,就OK了.

下面给出测试DEMO程序:

package com.example.androidvolumedemo;

import android.media.AudioManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;

public class MainActivity extends Activity implements OnSeekBarChangeListener {

    private AudioManager mAudioManager;

    private SeekBar mSpkSeekBar;
    private SeekBar mHandSeekBar;
    private SeekBar mHeadSeekBar;
    private SeekBar mRingSeekBar;
    private SeekBar mNotifSeekBar;

    private Button mUpdateBtn;

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

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

        mSpkSeekBar = (SeekBar) findViewById(R.id.tf_gro_speaker_bar);
        mSpkSeekBar.setOnSeekBarChangeListener(this);
        mSpkSeekBar.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_SYSTEM));

        mHandSeekBar = (SeekBar) findViewById(R.id.tf_gro_handset_bar);
        mHandSeekBar.setOnSeekBarChangeListener(this);
        mHandSeekBar.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL));

        mHeadSeekBar = (SeekBar) findViewById(R.id.tf_gro_headset_bar);
        mHeadSeekBar.setOnSeekBarChangeListener(this);
        mHeadSeekBar.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_VOICE_CALL));

        mRingSeekBar = (SeekBar) findViewById(R.id.tf_gro_ring_bar);
        mRingSeekBar.setOnSeekBarChangeListener(this);
        mRingSeekBar.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_RING));

        mNotifSeekBar = (SeekBar) findViewById(R.id.tf_gro_notif_bar);
        mNotifSeekBar.setOnSeekBarChangeListener(this);
        mNotifSeekBar.setMax(mAudioManager.getStreamMaxVolume(AudioManager.STREAM_NOTIFICATION));


        mUpdateBtn=(Button)findViewById(R.id.updatebtn);
        mUpdateBtn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                updateUI();
            }

        });

        updateUI();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        switch (keyCode) {
        case KeyEvent.KEYCODE_VOLUME_DOWN:
        case KeyEvent.KEYCODE_VOLUME_UP:

            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub
        switch (keyCode) {
        case KeyEvent.KEYCODE_VOLUME_DOWN:

            return true;
        case KeyEvent.KEYCODE_VOLUME_UP:

            return true;
        }
        return super.onKeyUp(keyCode, event);
    }

    @Override
    public void onProgressChanged(SeekBar seekBar, int progress,
            boolean fromUser) {
        // TODO Auto-generated method stub
        int id = seekBar.getId();

        switch (id) {
        case R.id.tf_gro_speaker_bar:
            mAudioManager.setStreamVolume(AudioManager.STREAM_SYSTEM, progress, AudioManager.FLAG_PLAY_SOUND);

            break;
        case R.id.tf_gro_handset_bar:
            mAudioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL, progress, AudioManager.FLAG_PLAY_SOUND);
            break;
        case R.id.tf_gro_headset_bar:
            mAudioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL, progress, AudioManager.FLAG_PLAY_SOUND);
            break;
        case R.id.tf_gro_ring_bar:
            mAudioManager.setStreamVolume(AudioManager.STREAM_RING, progress, AudioManager.FLAG_PLAY_SOUND);
            break;
        case R.id.tf_gro_notif_bar:
            mAudioManager.setStreamVolume(AudioManager.STREAM_NOTIFICATION, progress, AudioManager.FLAG_PLAY_SOUND);
            break;

        }

//        updateUI();

    }

    private void updateUI(){

        this.mSpkSeekBar.setProgress(mAudioManager.getStreamVolume(AudioManager.STREAM_SYSTEM));
        this.mHandSeekBar.setProgress(mAudioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL));
        this.mHeadSeekBar.setProgress(mAudioManager.getStreamVolume(AudioManager.STREAM_VOICE_CALL));
        this.mRingSeekBar.setProgress(mAudioManager.getStreamVolume(AudioManager.STREAM_RING));
        this.mNotifSeekBar.setProgress(mAudioManager.getStreamVolume(AudioManager.STREAM_NOTIFICATION));

    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        // TODO Auto-generated method stub

    }

}

xml文件内容:

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="195dp"
        android:orientation="vertical" >

        <!-- system -->
        <TextView 
            android:id="@+id/tev1"
            android:layout_width="wrap_content"
            android:layout_height="32dp"
            android:paddingLeft="10dip"
            android:text="speaker"/>

        <TableLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <TableRow 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/imagev4"
                    android:paddingRight="10dip"    
                    android:paddingLeft="10dip"                
                    android:src="@drawable/ic_action_volume_on"
                />
                <SeekBar
                    android:id="@+id/tf_gro_speaker_bar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

            </TableRow>

        </TableLayout>

        <!-- voice -->
        <TextView 
            android:id="@+id/tev2"
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="32dp"
            android:paddingLeft="10dip"
            android:text="handset"/>

        <TableLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <TableRow 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/imagev1"
                    android:paddingRight="10dip"    
                    android:paddingLeft="10dip"                
                    android:src="@drawable/ic_action_ring_volume"
                />
                <SeekBar
                    android:id="@+id/tf_gro_handset_bar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

            </TableRow>

        </TableLayout>

        <TextView 
            android:id="@+id/tev3"
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="32dp"
            android:paddingLeft="10dip"
            android:text="headset"/>
        <TableLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <TableRow 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/imagev3"
                    android:paddingRight="10dip"
                    android:paddingLeft="10dip"
                    android:src="@drawable/ic_action_headset"
                />
                <SeekBar
                    android:id="@+id/tf_gro_headset_bar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

            </TableRow>

        </TableLayout>

        <TextView 
            android:id="@+id/tev5"
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="32dp"
            android:paddingLeft="10dip"
            android:text="ring"/> 
        <TableLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <TableRow 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/imagev2"
                    android:paddingRight="10dip"
                    android:paddingLeft="10dip"
                    android:src="@drawable/ic_action_volume_on"
                />
                <SeekBar
                    android:id="@+id/tf_gro_ring_bar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

            </TableRow>

        </TableLayout>

        <TextView 
            android:id="@+id/tev2"
            android:layout_marginTop="20dp"
            android:layout_width="wrap_content"
            android:layout_height="32dp"
            android:paddingLeft="10dip"
            android:text="notifications"/>
        <TableLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content">
            <TableRow 
                android:layout_width="fill_parent"
                android:layout_height="wrap_content">

                <ImageView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/imagev2"
                    android:paddingRight="10dip"
                    android:paddingLeft="10dip"
                    android:src="@drawable/ic_action_warning"
                />

                <Button
                    android:id="@+id/updatebtn"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="update UI" />



                <SeekBar
                    android:id="@+id/tf_gro_notif_bar"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1" />

            </TableRow>

        </TableLayout>

    </LinearLayout>

</ScrollView>

 

OK,就可以了.

 

如果要增加相关关系,即如果STREAM_SYSTEM的volume调节为0时,MUTE住了STREAM_SYSTEM,还要增加对STREAM_MUSIC的MUTE作用,可以依照RING修改的做法进行依葫芦画瓢,进行逆向操作,修改的文件都是一样的.