Android--聲音服務（AudioManager）

標籤：android   mediaplayer   

main.xml代碼如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ImageButton        android:id="@+id/voiceon"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/voice_on"/>     <ImageButton        android:id="@+id/voiceoff"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/voice_off"/>      <ImageButton        android:id="@+id/voicevibrate"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/voice_vibrate"/>       <ImageButton        android:id="@+id/voicelower"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/voice_lower"/>        <ImageButton        android:id="@+id/voiceraise"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/voice_raise"/></LinearLayout>

Activity程式如下：

package org.lxh.demo;import java.io.IOException;import android.app.Activity;import android.content.Context;import android.media.AudioManager;import android.media.MediaPlayer;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageButton;import android.widget.Toast;public class MyAudioManagerDemo extends Activity {private ImageButton voiceOn = null ;private ImageButton voiceOff = null ;private ImageButton voiceVibrate = null ;private ImageButton voiceLower = null ;private ImageButton voiceRaise = null ;private AudioManager audio = null ;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);super.setContentView(R.layout.main);this.voiceOn = (ImageButton) super.findViewById(R.id.voiceon) ;this.voiceOff = (ImageButton) super.findViewById(R.id.voiceoff) ;this.voiceVibrate = (ImageButton) super.findViewById(R.id.voicevibrate) ;this.voiceLower = (ImageButton) super.findViewById(R.id.voicelower) ;this.voiceRaise = (ImageButton) super.findViewById(R.id.voiceraise) ;this.audio = (AudioManager) super.getSystemService(Context.AUDIO_SERVICE);this.voiceOn.setOnClickListener(new VoiceOnOnClickListenerImpl()) ;this.voiceOff.setOnClickListener(new VoiceOffOnClickListenerImpl()) ;this.voiceVibrate.setOnClickListener(new VoiceVibrateOnClickListenerImpl()) ;this.voiceLower.setOnClickListener(new VoiceLowerOnClickListenerImpl()) ;this.voiceRaise.setOnClickListener(new VoiceRaiseOnClickListenerImpl()) ;this.playAudio();}private void playAudio(){MediaPlayer media = MediaPlayer.create(this, R.raw.mldn_java);media.setLooping(true);// 迴圈播放try {media.prepare() ;} catch (Exception e) {}media.start() ;}private class VoiceOnOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {MyAudioManagerDemo.this.audio.setRingerMode(AudioManager.RINGER_MODE_NORMAL) ;Toast.makeText(MyAudioManagerDemo.this, "手機音量開啟！", Toast.LENGTH_SHORT).show() ;}}private class VoiceOffOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {MyAudioManagerDemo.this.audio.setRingerMode(AudioManager.RINGER_MODE_SILENT) ;Toast.makeText(MyAudioManagerDemo.this, "手機靜音！", Toast.LENGTH_SHORT).show() ;}}private class VoiceVibrateOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {MyAudioManagerDemo.this.audio.setRingerMode(AudioManager.RINGER_MODE_VIBRATE) ;Toast.makeText(MyAudioManagerDemo.this, "手機為震動模式！", Toast.LENGTH_SHORT).show() ;}}private class VoiceLowerOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {MyAudioManagerDemo.this.audio.adjustVolume(AudioManager.ADJUST_LOWER, 0) ;Toast.makeText(MyAudioManagerDemo.this, "音量減小！", Toast.LENGTH_SHORT).show() ;}}private class VoiceRaiseOnClickListenerImpl implements OnClickListener {@Overridepublic void onClick(View v) {MyAudioManagerDemo.this.audio.adjustVolume(AudioManager.ADJUST_RAISE, 0) ;Toast.makeText(MyAudioManagerDemo.this, "音量增加！", Toast.LENGTH_SHORT).show() ;}}}

運行效果如下：

Android--聲音服務（AudioManager）