android - 具有单独行布局的 ListView 无法正确生成 View

Question

您好，我创建了一个 ListView ，其中包含四个布局，我的数据集是图像、文本、音频和视频。所以我相应地增加布局。一旦数据来自 Api，图像被缓存，音频视频和文本分别存储在文件夹和 sqlite 中。但是当我第二次打开时， ListView 随机或有时无序显示数据。甚至有时不显示全部数据。这是我的适配器代码。

public class ListViewAdapter extends BaseAdapter {

ArrayList<ListModel> myList = new ArrayList<ListModel>();
LayoutInflater inflater;
Context context;
int flag = 0;
private static final int TYPE_ITEM1 = 1;
private static final int TYPE_ITEM2 = 2;
private static final int TYPE_ITEM3 = 3;
private static final int TYPE_ITEM4 = 4;
private String url;
private String vPath;
private MediaPlayer mp;



public ListViewAdapter(Context context, ArrayList<ListModel> myList) {
    this.myList = myList;
    this.context = context;
    inflater = LayoutInflater.from(this.context);

}


int type;

@Override
public int getItemViewType(int position) {
    ListModel listModel = myList.get(position);
    String data = listModel.getType();
  /*  if (data.equals("Text")) {
        return type1;
    } else if (data.equals("Image")) {
        return type2;

    }return 0;*/

    if (data.equals("Text")) {
        type = TYPE_ITEM1;
    } else if (data.equals("Image")) {
        type = TYPE_ITEM2;
    } else if (data.equals("Audio")) {
        type = TYPE_ITEM3;
    }else if(data.contains("Video")){
        type=TYPE_ITEM4;
    }

    return type;

}

@Override
public int getViewTypeCount() {
    return myList.size() + 1;
}


@Override
public int getCount() {
    return myList.size();
}


@Override
public ListModel getItem(int position) {
    // return myList.get(position);

    if (position >= myList.size()) {
        return null;
    }
    return myList.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}


@Override
public View getView(final int position, View v, ViewGroup parent) {
    ViewHolder holder = null;
    TextView textView = null;
    ImageView imageView = null;
    VideoView vPlayer = null;
    Button pause = null;
    Button play = null;

    int type = getItemViewType(position);
    System.out.println("getView " + position + " " + v + " type = " + type);
    if (v == null) {
        holder = new ViewHolder();
        if (type == TYPE_ITEM1) {
            v = inflater.inflate(R.layout.list_text, null);
            textView = (TextView) v.findViewById(R.id.text);
        } else if (type == TYPE_ITEM2) {
            v = inflater.inflate(R.layout.list_image, null);
            imageView = (ImageView) v.findViewById(R.id.imgView);
        } else if (type == TYPE_ITEM3) {
            v = inflater.inflate(R.layout.list_audio, null);
            play = (Button) v.findViewById(R.id.btn_play);
            pause = (Button) v.findViewById(R.id.stop);
        } else if (type == TYPE_ITEM4) {
            v = inflater.inflate(R.layout.list_video, null);
            vPlayer = (VideoView) v.findViewById(R.id.video_player);

        }
        holder.textView = textView;
        holder.videoPlayer = vPlayer;
        holder.imageView = imageView;
        holder.play = play;
        holder.stop = pause;
        v.setTag(holder);
    } else {
        holder = (ViewHolder) v.getTag();
    }
    ListModel model = myList.get(position);
    if (holder.play != null) {
        holder.play.setId(position);

    }if (holder.videoPlayer!=null){
        holder.videoPlayer.setId(position);
    }if (holder.stop!=null){
        holder.stop.setId(position);
    }

    String datatype = model.getType();

    if (datatype.equals("Text")) {
        holder.textView.setText(model.getData());
    } else if (datatype.equals("Image")) {
        UrlImageViewHelper.setUrlDrawable(holder.imageView, model.getData());
    } else if (datatype.equals("Audio")) {
        url = model.getData();
    }else if (datatype.equals("Video")){
        vPath=model.getData();

    }
    if (holder.play != null) {
        holder.play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int i = view.getId();
                ListModel model = myList.get(i);
                String audioUri = model.getData();
                new PlayMusicFromPath().execute(audioUri);
            }
        });
        if (holder.stop!=null){
        holder.stop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });}
        if (holder.videoPlayer!=null) {

            final ViewHolder finalHolder = holder;
            holder.videoPlayer.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    int videoId = view.getId();
                    ListModel model1 = myList.get(videoId);
                    String videoUrl = model1.getData();
                    finalHolder.videoPlayer.setVideoPath(videoUrl);



                }
            });
        }

    }

    return v;
}


public static class ViewHolder {
    public TextView textView;
    public ImageView imageView;
    public Button play, stop;
    public VideoView videoPlayer;


}


public void audioPlayer(String fileName) {
    //set up MediaPlayer
    mp = new MediaPlayer();

    try {
        mp.setDataSource(fileName);
    } 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();
    }
    try {
        mp.prepare();
    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    mp.start();
}

class PlayMusicFromPath extends AsyncTask<String, String, String> {

    // Show Progress bar before downloading Music
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // Shows Progress Bar Dialog and then call doInBackground method

    }

    // Download Music File from Internet
    @Override
    protected String doInBackground(String... f_url) {
        audioPlayer(f_url[0]);

        return null;
    }

    // Once Music File is downloaded
    @Override
    protected void onPostExecute(String file_url) {
        System.out.print(file_url);

    }
}

观点如下list_Video 包含一个视频 View list_audio 包含两个按钮播放和暂停。list_text 包含一个 textView和 list_image 包含一个 ImageView Logcat 是

addInArray been called, this = android.widget.ListView{443bacd0 VFED.VC. .F....ID 0,0-540,838 #7f0a006d app:id/listview}call stack =
java.lang.Throwable: addInArray
        at android.view.ViewGroup.addInArray(ViewGroup.java:3786)
        at android.view.ViewGroup.addViewInner(ViewGroup.java:3740)
        at android.view.ViewGroup.addViewInLayout(ViewGroup.java:3687)
        at android.widget.ListView.setupChild(ListView.java:1862)
        at android.widget.ListView.makeAndAddView(ListView.java:1815)
        at android.widget.ListView.fillDown(ListView.java:698)
        at android.widget.ListView.fillFromTop(ListView.java:759)
        at android.widget.ListView.layoutChildren(ListView.java:1631)
        at android.widget.AbsListView.onLayout(AbsListView.java:2150)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
        at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1877)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1653)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:493)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1888)
        at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1742)
        at android.widget.LinearLayout.onLayout(LinearLayout.java:1651)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2323)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2029)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1192)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6231)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:788)
        at android.view.Choreographer.doCallbacks(Choreographer.java:591)
        at android.view.Choreographer.doFrame(Choreographer.java:560)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:774)
        at android.os.Handler.handleCallback(Handler.java:808)
        at android.os.Handler.dispatchMessage(Handler.java:103)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:5292)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640)
        at dalvik.system.NativeStart.main(Native Method)

我也看到了这些线条..myprojectname while:A105 to many

Answer 1

在 View 类型计数中，您需要提供不同类型的 View 计数，而不是列表计数。在你的情况下，它应该是四个(文本、图像、音频和视频)

@Override
public int getViewTypeCount() {
    return 4;
}