안드로이드에서 seekbar 사용

Question

나는 음악을위한 seekbar가있는 안드로이드 응용 프로그램을 만들고 있습니다. 음악 재생 상태를 보여주는 검색 표시 줄이 있는데, 현재 음악 재생 중입니다. 하지만 미디어 플레이어가 트랙에서 특정 장소를 재생할 수 있도록 청취자를 설정하려면 어떻게해야합니까? Mediaplayer에서 재생 시간을 설정하는 코드는 알고 있지만 seekbar에서 클릭 이벤트를 처리하려면 어떻게해야합니까? onClick() 또는 이와 유사한 것은? 고정

: 내 코드 :

package com.mycompany.appname; 

import java.io.File; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.Arrays; 
import java.util.List; 

import android.app.ListActivity; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.os.CountDownTimer; 
import android.os.Environment; 
import android.view.KeyEvent; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ListAdapter; 
import android.widget.ListView; 
import android.widget.SeekBar; 
import android.widget.SeekBar.OnSeekBarChangeListener; 
import android.widget.SlidingDrawer; 

public class MusicActivity extends ListActivity implements OnClickListener, OnSeekBarChangeListener { 
//Called when the activity is first created 
List<String> myList = new ArrayList<String>(); 
EditText AddItemToListViewEditText; 
    static final String[] COUNTRIES = new String[] { 
     "Movies" 
     }; 
    MediaPlayer mp1; 
    String musicUri; 
    Button PausePlay; 
    int positionInt; 
    SlidingDrawer slidingDrawer2; 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.musicscreen); 

    //Import views 
    PausePlay = (Button)findViewById(R.id.PausePlay); 
    slidingDrawer2 = (SlidingDrawer)findViewById(R.id.slidingDrawer2); 

    //Setup onClickListener for the buttons 
    PausePlay.setOnClickListener(this); 

    //Setup mediaPlayer 
    mp1 = new MediaPlayer(); 

    //Setup ListView 
    setListAdapter((ListAdapter) new ArrayAdapter<String>(this, R.layout.list_item, COUNTRIES)); 
    setListAdapter((ListAdapter) new ArrayAdapter<String>(this, R.layout.list_item, myList)); 

    //Setup seekBar 
    final SeekBar progress = (SeekBar)findViewById(R.id.musicProgressBar); 
    progress.setOnSeekBarChangeListener(this); 

    ListView lv = getListView(); 
    lv.setTextFilterEnabled(true); 

    File mFile = new File(Environment.getExternalStorageDirectory() + "/Music/"); 
    myList.addAll(Arrays.asList(mFile.list())); 
    setListAdapter((ListAdapter) new ArrayAdapter<String>(this, R.layout.list_item, myList)); 

    lv.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView<?> parent, View view, 
      int position, long id) { 
     //When an item is clicked, play it on a MediaPlayer 
      //Play song 
      positionInt = position; 
      if (mp1.isPlaying()) { 
       //Reset mediaPlayer 
       mp1.reset(); 
       try { 
        musicUri = Environment.getExternalStorageDirectory() + "/Music/" + myList.get(positionInt); 
       mp1.setDataSource(musicUri); 
       mp1.prepare(); 
       mp1.start(); 
       slidingDrawer2.animateOpen(); 
      } catch (IllegalArgumentException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } catch (IllegalStateException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      } else { 
      try { 
       musicUri = Environment.getExternalStorageDirectory() + "/Music/" + myList.get(position); 
      mp1.setDataSource(musicUri); 
      mp1.prepare(); 
      mp1.start(); 
      slidingDrawer2.animateOpen(); 
     } catch (IllegalArgumentException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IllegalStateException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

      //Setup seekBar 
      final SeekBar progress = (SeekBar)findViewById(R.id.musicProgressBar); 
      progress.setProgress(0); 
      progress.setMax(mp1.getDuration()); 
      new CountDownTimer(mp1.getDuration(), 250) { 
      public void onTick(long millisUntilFinished) { 
       if (progress.getProgress() == mp1.getDuration()) { 
        mp1.reset(); 
        progress.setProgress(0); 
       } else { 
        progress.setProgress(mp1.getCurrentPosition()); 
       } 
      } 
      public void onFinish() {} 
      }.start(); 
     } 
    } 
    }); 
} 

@Override 
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 
    if (fromUser == true) { 
     mp1.seekTo(seekBar.getProgress()); 
    } else { 
     //Do nothing 
    } 
} 

@Override 
public boolean onKeyDown(int KeyCode, KeyEvent event) { 
    if ((KeyCode == KeyEvent.KEYCODE_BACK)) { 
     if (mp1.isPlaying()) { 
      mp1.reset(); 
      System.exit(0); 
     } else { 
      finish(); 
     } 
     return true; 
    } 
    return super.onKeyDown(KeyCode, event); 
} 

public void onClick(View src) { 
    switch(src.getId()) { 
    case R.id.PausePlay: 
     if (mp1.isPlaying()) { 
      mp1.pause(); 
      PausePlay.setText("Play"); 
     } else { 
      mp1.start(); 
      PausePlay.setText("Pause"); 
     } 
     break; 
    } 
} 

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

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

내 XML은 :

<?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" > 


<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Musikk" 
    android:textAppearance="?android:attr/textAppearanceLarge" /> 

<FrameLayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" > 




    <ListView 
     android:id="@+android:id/list" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" > 

    </ListView> 


    <SlidingDrawer 
     android:id="@+id/slidingDrawer2" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:content="@+id/content" 
     android:handle="@+id/handle" > 


     <Button 
      android:id="@+id/handle" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="Spiller nå" /> 


     <LinearLayout 
      android:id="@+id/content" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:orientation="vertical" > 


      <SeekBar 
       android:id="@+id/musicProgressBar" 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" /> 

      <LinearLayout 
       android:layout_width="fill_parent" 
       android:layout_height="wrap_content" > 













       <Button 
        android:id="@+id/PausePlay" 
        android:layout_width="fill_parent" 
        android:layout_height="wrap_content" 
        android:text="Pause" /> 

      </LinearLayout> 

     </LinearLayout> 
    </SlidingDrawer> 

</FrameLayout> 

</LinearLayout> 

Answer 1

그런 다음, SeekBar.OnSeekBarChangeListener을 구현하는 onProgressChanged 메소드를 구현하는 것이 좋습니다.

이것은 진행 상황이 변경 될 때 (예 : 사용자가 탐색 모음의 어딘가를 클릭하는 경우) 호출되며 새 위치를 제공합니다.

예 :

public void onProgressChanged (SeekBar seekBar, int progress, boolean fromUser) { 
    // Do something 
} 

또한합니다 ([자바 변수 명명 규칙]을 체크 아웃해야 seekBar.setOnseekBarChangeListener

Answer 2

public void onProgressChanged(SeekBar seekBar, int progress, 
        boolean fromUser) { 
       // TODO Auto-generated method stub 
       if (fromUser) { 
        mp1.seekTo(progress); 
        seekBar.setProgress(progress); 
       } 

      }