001.package com.myapp;
002.
003.
004.import java.io.IOException;
005.
006.import android.media.AudioManager;
007.import android.media.MediaPlayer;
008.import android.os.Bundle;
009.import android.os.Handler;
010.import android.app.Activity;
011.import android.content.Context;
012.import android.view.Menu;
013.import android.view.View;
014.import android.view.View.OnTouchListener;
015.import android.widget.Button;
016.import android.view.MotionEvent;
017.import android.widget.SeekBar;
018.import android.widget.SeekBar.OnSeekBarChangeListener;
019.import android.widget.TextView;
020.
021.public class MainActivity extends Activity {
022.
023. private MediaPlayer mMedia;
024. private Handler handler = new Handler();
025. private SeekBar seekBar1;
026.
027.
028. @Override
029. public void onCreate(Bundle savedInstanceState) {
030. super.onCreate(savedInstanceState);
031. setContentView(R.layout.activity_main);
032.
033.
034. ValumnControls();
035.
036.
037. if(mMedia != null){
038. mMedia.release();
039. }
040.
041. final TextView txtView = (TextView)findViewById(R.id.textView1);
042. txtView.setText("Source : music.mp3");
043.
044.
045.
046.
047.
048.
049.
050.
051.
052.
053.
054.
055.
056. mMedia = MediaPlayer.create(this, R.raw.music);
057.
058.
059. seekBar1 = (SeekBar)findViewById(R.id.seekBar1);
060. seekBar1.setMax(mMedia.getDuration());
061. seekBar1.setOnTouchListener(new OnTouchListener() {
062. public boolean onTouch(View v, MotionEvent event) {
063. UpdateseekChange(v);
064. return false;
065. }
066. });
067.
068.
069.
070.
071. final Button btn1 = (Button) findViewById(R.id.button1);
072. final Button btn2 = (Button) findViewById(R.id.button2);
073. final Button btn3 = (Button) findViewById(R.id.button3);
074.
075.
076.
077. btn1.setOnClickListener(new View.OnClickListener() {
078. public void onClick(View v) {
079. txtView.setText("Playing : music.mp3....");
080. mMedia.start();
081. startPlayProgressUpdater();
082. btn1.setEnabled(false);
083. btn2.setEnabled(true);
084. btn3.setEnabled(true);
085. }
086. });
087.
088.
089. btn2.setOnClickListener(new View.OnClickListener() {
090. public void onClick(View v) {
091. txtView.setText("Pause : music.mp3");
092. mMedia.pause();
093. btn1.setEnabled(true);
094. btn2.setEnabled(false);
095. btn3.setEnabled(false);
096. }
097. });
098.
099.
100. btn3.setOnClickListener(new View.OnClickListener() {
101. public void onClick(View v) {
102. txtView.setText("Stop Play : music.mp3");
103. mMedia.stop();
104. btn1.setEnabled(true);
105. btn2.setEnabled(false);
106. btn3.setEnabled(false);
107. try {
108. mMedia.prepare();
109. mMedia.seekTo(0);
110. } catch (IllegalStateException e) {
111.
112. e.printStackTrace();
113. } catch (IOException e) {
114.
115. e.printStackTrace();
116. }
117.
118. }
119. });
120.
121. }
122.
123. private void UpdateseekChange(View v){
124. if(mMedia.isPlaying()){
125. SeekBar sb = (SeekBar)v;
126. mMedia.seekTo(sb.getProgress());
127. }
128. }
129.
130. public void startPlayProgressUpdater() {
131. seekBar1.setProgress(mMedia.getCurrentPosition());
132.
133. if (mMedia.isPlaying()) {
134. Runnable notification = new Runnable() {
135. public void run() {
136. startPlayProgressUpdater();
137. }
138. };
139. handler.postDelayed(notification,1000);
140. }
141. }
142.
143.
144. @Override
145. protected void onDestroy() {
146.
147. super.onDestroy();
148. if(mMedia != null){
149. mMedia.release();
150. }
151. }
152.
153.
154. private void ValumnControls()
155. {
156. try
157. {
158. SeekBar seekBar2 = (SeekBar)findViewById(R.id.seekBar2);
159. final AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
160. seekBar2.setMax(audioManager
161. .getStreamMaxVolume(AudioManager.STREAM_MUSIC));
162. seekBar2.setProgress(audioManager
163. .getStreamVolume(AudioManager.STREAM_MUSIC));
164.
165.
166. seekBar2.setOnSeekBarChangeListener(new OnSeekBarChangeListener()
167. {
168. public void onStopTrackingTouch(SeekBar arg0)
169. {
170. }
171.
172. public void onStartTrackingTouch(SeekBar arg0)
173. {
174. }
175.
176. public void onProgressChanged(SeekBar arg0, int progress, boolean arg2)
177. {
178. audioManager.setStreamVolume(AudioManager.STREAM_MUSIC,
179. progress, 0);
180. }
181. });
182. }
183. catch (Exception e)
184. {
185. e.printStackTrace();
186. }
187. }
188.
189. @Override
190. public boolean onCreateOptionsMenu(Menu menu) {
191. getMenuInflater().inflate(R.menu.activity_main, menu);
192. return true;
193. }
194.
195.}
ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน 
