是否有可能使ListView水平?我使用图库视图完成了此操作,但所选项目会自动出现在屏幕的中心。我不希望选中的项目位于我点击的同一位置。我该如何纠正这个问题?我的想法是用水平滚动来设置ListView。分享你的想法?
当前回答
Paul没有费心去修复他的库中的bug或接受用户的修复。这就是为什么我建议另一个具有类似功能的库:
https://github.com/sephiroth74/HorizontalVariableListView
更新:2013年7月24日作者(sephiroth74)发布了基于android 4.2.2 ListView代码的完全重写版本。我必须说,它没有所有的错误,以前的版本有和伟大的工作!
其他回答
我的解决方案是简单地使用ViewPager小部件。它不像Gallery那样中心锁定,并且有一个用于循环视图的内置功能(如ListView)。你可能会看到类似的方法在谷歌播放应用程序,每当你处理水平滚动列表。
你只需要扩展PagerAdapter并在那里执行一些调整:
public class MyPagerAdapter extends PagerAdapter {
private Context mContext;
public MyPagerAdapter(Context context) {
this.mContext = context;
}
// As per docs, you may use views as key objects directly
// if they aren't too complex
@Override
public Object instantiateItem(ViewGroup container, int position) {
LayoutInflater inflater = LayoutInflater.from(mContext);
View view = inflater.inflate(R.layout.item, null);
container.addView(view);
return view;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return 10;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
// Important: page takes all available width by default,
// so let's override this method to fit 5 pages within single screen
@Override
public float getPageWidth(int position) {
return 0.2f;
}
}
因此,你将拥有一个带有适配器的水平滚动小部件,如下所示:
因为谷歌引入了Android支持库v7 21.0.0,你可以使用RecyclerView水平滚动项目。RecyclerView小部件是ListView的一个更高级、更灵活的版本。
要使用RecyclerView,只需添加依赖项:
com.android.support:recyclerview-v7:23.0.1
下面是一个例子:
public class MyActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(layoutManager);
MyAdapter adapter = new MyAdapter(myDataset);
recyclerView.setAdapter(adapter);
}
}
关于RecyclerView的更多信息:
https://developer.android.com/training/material/lists-cards.html https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
注意:Android现在支持使用RecyclerView的水平列表视图,所以现在这个答案是不赞成的,关于RecyclerView的信息: https://developer.android.com/reference/android/support/v7/widget/RecyclerView
我已经开发了一个逻辑来做到这一点,而不使用任何外部水平滚动视图库,这是我实现的水平视图,我已经在这里发布了我的答案:https://stackoverflow.com/a/33301582/5479863
我的json响应是这样的:
{"searchInfo":{"status":"1","message":"Success","clist":[{"id":"1de57434-795e-49ac-0ca3-5614dacecbd4","name":"Theater","image_url":"http://52.25.198.71/miisecretory/category_images/movie.png"},{"id":"62fe1c92-2192-2ebb-7e92-5614dacad69b","name":"CNG","image_url":"http://52.25.198.71/miisecretory/category_images/cng.png"},{"id":"8060094c-df4f-5290-7983-5614dad31677","name":"Wine-shop","image_url":"http://52.25.198.71/miisecretory/category_images/beer.png"},{"id":"888a90c4-a6b0-c2e2-6b3c-561788e973f6","name":"Chemist","image_url":"http://52.25.198.71/miisecretory/category_images/chemist.png"},{"id":"a39b4ec1-943f-b800-a671-561789a57871","name":"Food","image_url":"http://52.25.198.71/miisecretory/category_images/food.png"},{"id":"c644cc53-2fce-8cbe-0715-5614da9c765f","name":"College","image_url":"http://52.25.198.71/miisecretory/category_images/college.png"},{"id":"c71e8757-072b-1bf4-5b25-5614d980ef15","name":"Hospital","image_url":"http://52.25.198.71/miisecretory/category_images/hospital.png"},{"id":"db835491-d1d2-5467-a1a1-5614d9963c94","name":"Petrol-Pumps","image_url":"http://52.25.198.71/miisecretory/category_images/petrol.png"},{"id":"f13100ca-4052-c0f4-863a-5614d9631afb","name":"ATM","image_url":"http://52.25.198.71/miisecretory/category_images/atm.png"}]}}
布局文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="5">
<fragment
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="4" />
<HorizontalScrollView
android:id="@+id/horizontalScroll"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<LinearLayout
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
类文件:
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.ll);
for (int v = 0; v < collectionInfo.size(); v++) {
/*---------------Creating frame layout----------------------*/
FrameLayout frameLayout = new FrameLayout(ActivityMap.this);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, getPixelsToDP(90));
layoutParams.rightMargin = getPixelsToDP(10);
frameLayout.setLayoutParams(layoutParams);
/*--------------end of frame layout----------------------------*/
/*---------------Creating image view----------------------*/
final ImageView imgView = new ImageView(ActivityMap.this); //create imageview dynamically
LinearLayout.LayoutParams lpImage = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
imgView.setImageBitmap(collectionInfo.get(v).getCatImage());
imgView.setLayoutParams(lpImage);
// setting ID to retrieve at later time (same as its position)
imgView.setId(v);
imgView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// getting id which is same as its position
Log.i(TAG, "Clicked on " + collectionInfo.get(v.getId()).getCatName());
// getting selected category's data list
new GetSelectedCategoryData().execute(collectionInfo.get(v.getId()).getCatID());
}
});
/*--------------end of image view----------------------------*/
/*---------------Creating Text view----------------------*/
TextView textView = new TextView(ActivityMap.this);//create textview dynamically
textView.setText(collectionInfo.get(v).getCatName());
FrameLayout.LayoutParams lpText = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT, Gravity.BOTTOM | Gravity.CENTER);
// Note: LinearLayout.LayoutParams 's gravity was not working so I putted Framelayout as 3 paramater is gravity itself
textView.setTextColor(Color.parseColor("#43A047"));
textView.setLayoutParams(lpText);
/*--------------end of Text view----------------------------*/
//Adding views at appropriate places
frameLayout.addView(imgView);
frameLayout.addView(textView);
linearLayout.addView(frameLayout);
}
private int getPixelsToDP(int dp) {
float scale = getResources().getDisplayMetrics().density;
int pixels = (int) (dp * scale + 0.5f);
return pixels;
}
在这里工作的技巧是我分配给ImageView的id“imgView.setId(v)”,之后应用onClickListener,我再次获取视图的id ....为了便于理解,我还在代码中添加了注释, 我希望这对你很有用… 快乐的编码…:)
你总是可以创建你的textviews等动态和设置你的onclicklistener,就像你会做一个适配器
这不是一个很好的答案,但是如何使用水平滚动视图呢?
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