在一个活动中使用多个onItemClick .."重复方法"错误？

Question

我已经制作了一个艺术家列表,一旦点击就会显示一个专辑列表.这个想法是,一旦点击一个专辑,就会出现歌曲列表.

不幸的是,因为在这个活动中有两个listviews,第二个'onItemClick'方法在eclipse中被标记为'duplicate'.有谁知道如何解决这个问题？

这是主要的活动代码:

package music.library;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class MusicLibrary extends Activity implements OnItemClickListener {
  Cursor cursor;
  @SuppressWarnings("deprecation")
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    String[] columns = { 
            MediaStore.Audio.Artists._ID,
            MediaStore.Audio.Artists.ARTIST };

    cursor = managedQuery(MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
        columns, null, null, null);

    ListView listView = (ListView) findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    String[] displayFields = new String[] { MediaStore.Audio.Artists.ARTIST };
    int[] displayViews = new int[] { R.id.artistItem };
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
        R.layout.artist_item, cursor, displayFields, displayViews);
    listView.setAdapter(adapter);

  }


  @SuppressWarnings("deprecation")
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
    if (cursor.moveToPosition(position)) {

      String[] columns = {
          MediaStore.Audio.Media._ID,
          MediaStore.Audio.Media.ALBUM,
     };

      String where = android.provider.MediaStore.Audio.Media.ARTIST
          + "=?";

      String whereVal[] = { cursor.getString(cursor
          .getColumnIndex(MediaStore.Audio.Albums.ARTIST)) };

      String orderBy = android.provider.MediaStore.Audio.Media._ID;

      cursor = managedQuery(
          MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, columns,
          where, whereVal, orderBy);

      ListView listView = (ListView) findViewById(R.id.listView);
      String[] displayFields = new String[] { MediaStore.Audio.Media.ALBUM };
      int[] displayViews = new int[] { R.id.albumItem };
      SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
          R.layout.album_item, cursor, displayFields, displayViews);
      listView.setAdapter(adapter);

    }
  }


  @SuppressWarnings("deprecation")
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
        if (cursor.moveToPosition(position)) {

            String[] columns = { 
                MediaStore.Audio.Media._ID,
                MediaStore.Audio.Media.DISPLAY_NAME,
            };

            String where = MediaStore.Audio.Media.ALBUM
                + "=?";

            String whereVal[] = { cursor.getString(cursor
                .getColumnIndex(MediaStore.Audio.Albums.ALBUM)) };

            String orderBy = MediaStore.Audio.Media._ID;

            cursor = managedQuery(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, columns,
                where, whereVal, orderBy);

            ListView listView = (ListView) findViewById(R.id.listView);
            String[] displayFields = 
                    new String[] { MediaStore.Audio.Media.DISPLAY_NAME };
            int[] displayViews = new int[] { R.id.songItem };
            SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
                    R.layout.song_item, cursor, displayFields, displayViews);
                listView.setAdapter(adapter);

    }
  }

}

谢谢你的帮助.

- - 编辑 - -

谢谢你的回答.虽然所有答案都很棒,但我选择了dymmeh的答案作为我的"接受"答案,因为将观点分成不同的活动似乎最有意义(即使这不是我所说的我在寻找的内容)最初的问题).

我最终创建了以下内容:

头等舱,展示艺术家:

package music.library;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class MusicLibrary extends Activity implements OnItemClickListener {
  Cursor cursor;
  @SuppressWarnings("deprecation")
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    String[] columns = { 
            MediaStore.Audio.Artists._ID,
            MediaStore.Audio.Artists.ARTIST 
            };

    cursor = managedQuery(MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI,
        columns, null, null, null);

    ListView listView = (ListView) findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    String[] displayFields = new String[] { MediaStore.Audio.Artists.ARTIST };
    int[] displayViews = new int[] { R.id.artistItem };
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
        R.layout.artist_item, cursor, displayFields, displayViews);
    listView.setAdapter(adapter); }

    public void onItemClick(AdapterView<?> a, View v, int position, long id) {
        if (cursor.moveToPosition(position)) {

            String where = android.provider.MediaStore.Audio.Media.ARTIST
          + "=?";

            String whereVal[] = { cursor.getString(cursor
          .getColumnIndex(MediaStore.Audio.Albums.ARTIST)) };

    Intent intent = new Intent(MusicLibrary.this, AlbumSelection.class);
    intent.putExtra("where", where);
    intent.putExtra("whereVal", whereVal);
    startActivity(intent);

        }
     }
  } 

第二节课,展示专辑:

package music.library;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class AlbumSelection extends Activity implements OnItemClickListener {
  Cursor cursor;
  @SuppressWarnings("deprecation")
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    Bundle extras = getIntent().getExtras();
    String where = extras.getString("where");
    String[] whereVal = extras.getStringArray("whereVal");

    String[] columns = {
            MediaStore.Audio.Media._ID,
            MediaStore.Audio.Media.ALBUM,
       };

        String orderBy = android.provider.MediaStore.Audio.Media._ID;

    cursor = managedQuery(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,
        columns, where, whereVal, orderBy);

    ListView listView = (ListView) findViewById(R.id.listView);
    listView.setOnItemClickListener(this);
    String[] displayFields = new String[] { MediaStore.Audio.Media.ALBUM };
    int[] displayViews = new int[] { R.id.albumItem };
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
        R.layout.album_item, cursor, displayFields, displayViews);
    listView.setAdapter(adapter); }

  public void onItemClick(AdapterView<?> a, View v, int position, long id) {
      if (cursor.moveToPosition(position)) {

        String where = android.provider.MediaStore.Audio.Media.ALBUM
        + "=?";

        String whereVal[] = { cursor.getString(cursor
        .getColumnIndex(MediaStore.Audio.Albums.ALBUM)) };

  Intent intent = new Intent(AlbumSelection.this, SongSelection.class);
  intent.putExtra("where", where);
  intent.putExtra("whereVal", whereVal);
  startActivity(intent);

       }    
    }
  } 

第三节,播放歌曲:

package music.library;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class SongSelection extends Activity implements OnItemClickListener {
    Cursor cursor;
      @SuppressWarnings("deprecation")
      @Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Bundle extras = getIntent().getExtras();
        String where = extras.getString("where");
        String[] whereVal = extras.getStringArray("whereVal");

        String[] columns = {
                MediaStore.Audio.Media.DATA,
                MediaStore.Audio.Media._ID,
                MediaStore.Audio.Media.TITLE,
                MediaStore.Audio.Media.DISPLAY_NAME,
                MediaStore.Audio.Media.MIME_TYPE,
           };

            String orderBy = android.provider.MediaStore.Audio.Media.TITLE;

        cursor = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
            columns, where, whereVal, orderBy);

        ListView listView = (ListView) findViewById(R.id.listView);
        listView.setOnItemClickListener(this);
        String[] displayFields = new String[] { MediaStore.Audio.Media.TITLE };
        int[] displayViews = new int[] { R.id.songItem };
        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
            R.layout.song_item, cursor, displayFields, displayViews);
        listView.setAdapter(adapter); }

        public void onItemClick(AdapterView<?> a, View v, int position, long id) {
            if (cursor.moveToPosition(position)) {

        /*Intent intent = new Intent(AlbumSelection.this, SongSelection.class);
        intent.putExtra("ARTIST", artist);
        startActivity(intent);
*/
           }    
        }
      } 

这一切都很好用.

感谢所有回复.我希望听到有关如何整理/提高此代码效率的任何反馈.

再次感谢.

Answer 1

我找到了这个解决方案 View.getId()将返回值-1.所以我们无法知道该项目是否被点击.请adapter.getId()改用.它将返回正确的项目ID.

 @Override
 public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {
     if (adapter.getId() == R.id.ls_menu_genre) {
         //item was clicked
     }
 }