Android SharedPreferences数据存储

package com.Aina.Android;import java.io.IOException;import android.content.Context;import android.media.MediaPlayer;/** * com.Aina.Android * Pro_SharedPreferences * @author Aina.huang  E-mail: 674023920@qq.com * @version 创建时间：2010 Jun 18, 2010 5:11:14 PM  * 类说明  */public class MIDIPlayer {private MediaPlayer mMediaPlayer = null;private Context mContext = null;public MIDIPlayer(Context context){this.mContext = context;}//播放音乐public void PlayMusic(){mMediaPlayer = MediaPlayer.create(mContext, R.raw.start);//装载音乐mMediaPlayer.setLooping(true);//设置是否循环播放try {mMediaPlayer.prepare();} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}mMediaPlayer.start();}//停止并是否音乐public void FreeMusic(){if(mMediaPlayer != null){mMediaPlayer.stop();mMediaPlayer.release();}}}

package com.Aina.Android;import android.app.Activity;import android.content.SharedPreferences;import android.os.Bundle;import android.util.Log;import android.view.KeyEvent;import android.widget.TextView;public class Test_SharedPreferences extends Activity {/** Called when the activity is first created. */private MIDIPlayer mMIDIPlayer = null;private Boolean mbMusic = false;private TextView tv = null;@Overridepublic void onCreate(Bundle savedInstanceState) {Log.i("TAG-onCreate", "onCreate()");super.onCreate(savedInstanceState);setContentView(R.layout.main);tv = (TextView) this.findViewById(R.id.TextView);mMIDIPlayer = new MIDIPlayer(this);//取得活动的Preferences对象.SharedPreferences settings = this.getPreferences(Activity.MODE_PRIVATE);//取得值mbMusic = settings.getBoolean("bmusic", false);if(mbMusic){tv.setText("当前音乐状态:开");mbMusic = true;mMIDIPlayer.PlayMusic();//播放}else{tv.setText("当前音乐状态:关");mbMusic = false;}}@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {if(keyCode==KeyEvent.KEYCODE_DPAD_UP){tv.setText("当前音乐状态:开");mbMusic = true;mMIDIPlayer.PlayMusic();//播放}else if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){tv.setText("当前音乐状态:关");mbMusic = false;mMIDIPlayer.FreeMusic();}return super.onKeyDown(keyCode, event);}@Overrideprotected void onPause() {Log.i("TAG-onPause", "onPause()");//取得活动的Preferences对象.SharedPreferences uistate = this.getPreferences(Activity.MODE_PRIVATE);//取得编辑对象SharedPreferences.Editor e = uistate.edit();//设置值e.putBoolean("bmusic", mbMusic);//提交e.commit();if(mbMusic){mMIDIPlayer.FreeMusic();//停止释放音乐.}super.onPause();}}

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