（1）程序说明
在android API的AudioManager中，提供了调节手机音量的办法。
audioMa.adjustVolume(AudioManager.ADJUST_LOWER, 0);
audioMa.adjustVolume(AudioManager.ADJUST_RAISE, 0);也可以调节手机声音的模式为震动或者静音
audioMa.setRingerMode(AudioManager.RINGER_MODE_NORMAL);
audioMa.setRingerMode(AudioManager.RINGER_MODE_SILENT);
audioMa.setRingerMode(AudioManager.RINGER_MODE_VIBRATE);
（2）布局文件
<?xml version="1.0" encoding="utf-8"?><AbsoluteLayout android:id="@+id/layout1" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/white" xmlns:android="http://schemas.android.com/apk/res/android"> <TextView android:id="@+id/myText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/str_text1" android:textSize="16sp" android:textColor="@drawable/black" android:layout_x="20px" android:layout_y="42px" > </TextView> <ImageView android:id="@+id/myImage" android:layout_width="48px" android:layout_height="48px" android:layout_x="110px" android:layout_y="32px" > </ImageView> <TextView android:id="@+id/myText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/str_text2" android:textSize="16sp" android:textColor="@drawable/black" android:layout_x="20px" android:layout_y="102px" > </TextView> <ProgressBar android:id="@+id/myProgress" style="?android:attr/progressBarStyleHorizontal" android:layout_width="160dip" android:layout_height="wrap_content" android:max="7" android:progress="5" android:layout_x="110px" android:layout_y="102px" > </ProgressBar> <ImageButton android:id="@+id/downButton" android:layout_width="100px" android:layout_height="100px" android:layout_x="50px" android:layout_y="162px" android:src="@drawable/down" > </ImageButton> <ImageButton android:id="@+id/upButton" android:layout_width="100px" android:layout_height="100px" android:layout_x="150px" android:layout_y="162px" android:src="@drawable/up" > </ImageButton> <ImageButton android:id="@+id/normalButton" android:layout_width="60px" android:layout_height="60px" android:layout_x="50px" android:layout_y="272px" android:src="@drawable/normal" > </ImageButton> <ImageButton android:id="@+id/muteButton" android:layout_width="60px" android:layout_height="60px" android:layout_x="120px" android:layout_y="272px" android:src="@drawable/mute" > </ImageButton> <ImageButton android:id="@+id/vibrateButton" android:layout_width="60px" android:layout_height="60px" android:layout_x="190px" android:layout_y="272px" android:src="@drawable/vibrate" > </ImageButton></AbsoluteLayout>
（3）代码：
package com.liuzuyi.soundmode;import android.app.Activity;import android.content.Context;import android.media.AudioManager;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ProgressBar;public class MainActivity extends Activity { private ImageView myimage; private ImageButton downbutton; private ImageButton upbutton; private ImageButton normalbutton; private ImageButton mutebutton; private ImageButton vibratebutton; private ProgressBar myprogress; private AudioManager audioMa; private int volume; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); audioMa =(AudioManager)getSystemService(Context.AUDIO_SERVICE); myimage = (ImageView)findViewById(R.id.myImage); myprogress =(ProgressBar)findViewById(R.id.myProgress); downbutton =(ImageButton)findViewById(R.id.downButton); upbutton =(ImageButton)findViewById(R.id.upButton); normalbutton=(ImageButton)findViewById(R.id.normalButton); mutebutton=(ImageButton)findViewById(R.id.muteButton); vibratebutton=(ImageButton)findViewById(R.id.vibrateButton); volume =audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); int mode =audioMa.getRingerMode(); if(mode == AudioManager.RINGER_MODE_NORMAL ){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.normal)); } else if(mode == AudioManager.RINGER_MODE_SILENT){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.mute)); } else if(mode == AudioManager.RINGER_MODE_VIBRATE){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.vibrate)); } downbutton.setOnClickListener( new OnClickListener() { public void onClick(View v) { audioMa.adjustVolume(AudioManager.ADJUST_LOWER, 0); volume = audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); int mode =audioMa.getRingerMode(); if(mode == AudioManager.RINGER_MODE_NORMAL ){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.normal)); } else if(mode == AudioManager.RINGER_MODE_SILENT){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.mute)); } else if(mode == AudioManager.RINGER_MODE_VIBRATE){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.vibrate)); } } }); upbutton.setOnClickListener( new OnClickListener() { public void onClick(View v) { audioMa.adjustVolume(AudioManager.ADJUST_RAISE, 0); volume = audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); int mode =audioMa.getRingerMode(); if(mode == AudioManager.RINGER_MODE_NORMAL ){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.normal)); } else if(mode == AudioManager.RINGER_MODE_SILENT){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.mute)); } else if(mode == AudioManager.RINGER_MODE_VIBRATE){ myimage.setImageDrawable(getResources().getDrawable(R.drawable.vibrate)); } } }); normalbutton.setOnClickListener( new OnClickListener() { public void onClick(View v) { audioMa.setRingerMode(AudioManager.RINGER_MODE_NORMAL); volume = audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); myimage.setImageDrawable(getResources().getDrawable(R.drawable.normal)); } }); mutebutton.setOnClickListener( new OnClickListener() { public void onClick(View v) { audioMa.setRingerMode(AudioManager.RINGER_MODE_SILENT); volume = audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); myimage.setImageDrawable(getResources().getDrawable(R.drawable.mute)); } }); vibratebutton.setOnClickListener( new OnClickListener() { public void onClick(View v) { audioMa.setRingerMode(AudioManager.RINGER_MODE_VIBRATE); volume = audioMa.getStreamVolume(AudioManager.STREAM_RING); myprogress.setProgress(volume); myimage.setImageDrawable(getResources().getDrawable(R.drawable.vibrate)); } }); } }