如何实现像图库一样的 HorizontalScrollView？

我想用 Gallery 的一些特性来实现 Horizontal ScrollView, enter image description here

在画廊的滚动在一定的距离，它排列成对，也就是说，如果我们有三个图像显示在屏幕上，点击最后一个图像将排列在中心。

如上所述，如何实现 HorizontalSCrollView？

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小开

Here is a good tutorial with code. Let me know if it works for you! This is also a good tutorial.

EDIT

In This example, all you need to do is add this line:

gallery.setSelection(1);

after setting the adapter to gallery object, that is this line:

gallery.setAdapter(new ImageAdapter(this));

UPDATE1

Alright, I got your problem. This open source library is your solution. I also have used it for one of my projects. Hope this will solve your problem finally.

UPDATE2:

I would suggest you to go through this tutorial. You might get idea. I think I got your problem, you want the horizontal scrollview with snap. Try to search with that keyword on google or out here, you might get your solution.

小开

I implemented something similar with Horizontal Variable ListView The only drawback is, it works only with Android 2.3 and later.

Using this library is as simple as implementing a ListView with a corresponding Adapter. The library also provides an example

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I have created a horizontal ListView in every row of ListView if you want single You can do the following

Here I am just creating horizontalListView of Thumbnail of Videos Like this

enter image description here

The idea is just continuously add the ImageView to the child of LinearLayout in HorizontalscrollView

Note: remember to fire .removeAllViews(); before next time load other wise it will add duplicate child

Cursor mImageCursor = db.getPlaylistVideoImage(playlistId);
mVideosThumbs.removeAllViews();
if (mImageCursor != null && mImageCursor.getCount() > 0) {
for (int index = 0; index < mImageCursor.getCount(); index++) {
mImageCursor.moveToPosition(index);
ImageView iv = (ImageView) imageViewInfalter.inflate(
R.layout.image_view, null);
name = mImageCursor.getString(mImageCursor
.getColumnIndex("LogoDefaultName"));
logoFile = new File(MyApplication.LOCAL_LOGO_PATH, name);
if (logoFile.exists()) {
Uri uri = Uri.fromFile(logoFile);
iv.setImageURI(uri);
}
iv.setScaleType(ScaleType.FIT_XY);
mVideosThumbs.addView(iv);
}
mImageCursor.close();
mImageCursor = null;
} else {
ImageView iv = (ImageView) imageViewInfalter.inflate(
R.layout.image_view, null);
String name = "";
File logoFile;
name = mImageCursor.getString(mImageCursor
.getColumnIndex("LogoMediumName"));
logoFile = new File(MyApplication.LOCAL_LOGO_PATH, name);
if (logoFile.exists()) {
Uri uri = Uri.fromFile(logoFile);
iv.setImageURI(uri);
}
}

My xml for HorizontalListView

<HorizontalScrollView
android:id="@+id/horizontalScrollView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/linearLayoutTitle"
android:background="@drawable/shelf"
android:paddingBottom="@dimen/Playlist_TopBottom_margin"
android:paddingLeft="@dimen/playlist_RightLeft_margin"
android:paddingRight="@dimen/playlist_RightLeft_margin"
android:paddingTop="@dimen/Playlist_TopBottom_margin" >


<LinearLayout
android:id="@+id/linearLayoutVideos"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left|center_vertical"
android:orientation="horizontal" >
</LinearLayout>
</HorizontalScrollView>

and Also my Image View as each child

<?xml version="1.0" encoding="utf-8"?>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"




android:id="@+id/imageViewThumb"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginRight="20dp"
android:adjustViewBounds="true"
android:background="@android:color/transparent"
android:contentDescription="@string/action_settings"
android:cropToPadding="true"
android:maxHeight="200dp"
android:maxWidth="240dp"
android:padding="@dimen/playlist_image_padding"
android:scaleType="centerCrop"
android:src="@drawable/loading" />

To learn More you can follow the following links which have some easy samples

  1. http://www.dev-smart.com/?p=34
  2. Horizontal ListView in Android?
小开

Here is my layout:

    <HorizontalScrollView
android:id="@+id/horizontalScrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="@dimen/padding" >


<LinearLayout
android:id="@+id/shapeLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp" >
</LinearLayout>
</HorizontalScrollView>

And I populate it in the code with dynamic check-boxes.

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最佳答案

Try this code:

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="100dip"
tools:context=".MainActivity" >
<HorizontalScrollView
android:id="@+id/hsv"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:fillViewport="true"
android:measureAllChildren="false"
android:scrollbars="none" >
<LinearLayout
android:id="@+id/innerLay"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal" >
<LinearLayout
android:id="@+id/asthma_action_plan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/action_plan" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/controlled_medication"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/controlled" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/as_needed_medication"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/as_needed" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/rescue_medication"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/rescue" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/your_symptoms"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/symptoms" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/your_triggers"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/triggers" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/wheeze_rate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/wheeze_rate" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/peak_flow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="match_parent" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/peak_flow" />
<TextView
android:layout_width="0.2dp"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:background="@drawable/ln" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
</HorizontalScrollView>
<TextView
android:layout_width="fill_parent"
android:layout_height="0.2dp"
android:layout_alignParentRight="true"
android:layout_below="@+id/hsv"
android:background="@drawable/ln" />
<LinearLayout
android:id="@+id/prev"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:paddingLeft="5dip"
android:paddingRight="5dip"
android:descendantFocusability="blocksDescendants" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="@drawable/prev_arrow" />
</LinearLayout>
<LinearLayout
android:id="@+id/next"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:paddingLeft="5dip"
android:paddingRight="5dip"
android:descendantFocusability="blocksDescendants" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:src="@drawable/next_arrow" />
</LinearLayout>
</RelativeLayout>

grid_item.xml

<?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" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="100dp"
android:src="@drawable/ic_launcher" />
</LinearLayout>

MainActivity.java

import java.util.ArrayList;


import android.app.Activity;
import android.graphics.Rect;
import android.os.Bundle;
import android.os.Handler;
import android.view.Display;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;


public class MainActivity extends Activity {


LinearLayout asthmaActionPlan, controlledMedication, asNeededMedication,
rescueMedication, yourSymtoms, yourTriggers, wheezeRate, peakFlow;
LayoutParams params;
LinearLayout next, prev;
int viewWidth;
GestureDetector gestureDetector = null;
HorizontalScrollView horizontalScrollView;
ArrayList<LinearLayout> layouts;
int parentLeft, parentRight;
int mWidth;
int currPosition, prevPosition;


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


prev = (LinearLayout) findViewById(R.id.prev);
next = (LinearLayout) findViewById(R.id.next);
horizontalScrollView = (HorizontalScrollView) findViewById(R.id.hsv);
gestureDetector = new GestureDetector(new MyGestureDetector());
asthmaActionPlan = (LinearLayout) findViewById(R.id.asthma_action_plan);
controlledMedication = (LinearLayout) findViewById(R.id.controlled_medication);
asNeededMedication = (LinearLayout) findViewById(R.id.as_needed_medication);
rescueMedication = (LinearLayout) findViewById(R.id.rescue_medication);
yourSymtoms = (LinearLayout) findViewById(R.id.your_symptoms);
yourTriggers = (LinearLayout) findViewById(R.id.your_triggers);
wheezeRate = (LinearLayout) findViewById(R.id.wheeze_rate);
peakFlow = (LinearLayout) findViewById(R.id.peak_flow);


Display display = getWindowManager().getDefaultDisplay();
mWidth = display.getWidth(); // deprecated
viewWidth = mWidth / 3;
layouts = new ArrayList<LinearLayout>();
params = new LayoutParams(viewWidth, LayoutParams.WRAP_CONTENT);


asthmaActionPlan.setLayoutParams(params);
controlledMedication.setLayoutParams(params);
asNeededMedication.setLayoutParams(params);
rescueMedication.setLayoutParams(params);
yourSymtoms.setLayoutParams(params);
yourTriggers.setLayoutParams(params);
wheezeRate.setLayoutParams(params);
peakFlow.setLayoutParams(params);


layouts.add(asthmaActionPlan);
layouts.add(controlledMedication);
layouts.add(asNeededMedication);
layouts.add(rescueMedication);
layouts.add(yourSymtoms);
layouts.add(yourTriggers);
layouts.add(wheezeRate);
layouts.add(peakFlow);


next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Handler().postDelayed(new Runnable() {
public void run() {
horizontalScrollView.smoothScrollTo(
(int) horizontalScrollView.getScrollX()
+ viewWidth,
(int) horizontalScrollView.getScrollY());
}
}, 100L);
}
});


prev.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Handler().postDelayed(new Runnable() {
public void run() {
horizontalScrollView.smoothScrollTo(
(int) horizontalScrollView.getScrollX()
- viewWidth,
(int) horizontalScrollView.getScrollY());
}
}, 100L);
}
});


horizontalScrollView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
});
}


class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
if (e1.getX() < e2.getX()) {
currPosition = getVisibleViews("left");
} else {
currPosition = getVisibleViews("right");
}


horizontalScrollView.smoothScrollTo(layouts.get(currPosition)
.getLeft(), 0);
return true;
}
}


public int getVisibleViews(String direction) {
Rect hitRect = new Rect();
int position = 0;
int rightCounter = 0;
for (int i = 0; i < layouts.size(); i++) {
if (layouts.get(i).getLocalVisibleRect(hitRect)) {
if (direction.equals("left")) {
position = i;
break;
} else if (direction.equals("right")) {
rightCounter++;
position = i;
if (rightCounter == 2)
break;
}
}
}
return position;
}
}

Let me know if any issue enjoy...

小开

You may use HorizontalScrollView to implement Horizontal scrolling.

Code

<HorizontalScrollView
android:id="@+id/hsv"
android:layout_width="fill_parent"
android:layout_height="100dp"
android:layout_weight="0"
android:fillViewport="true"
android:measureAllChildren="false"
android:scrollbars="none" >
<LinearLayout
android:id="@+id/innerLay"
android:layout_width="wrap_content"
android:layout_height="100dp"
android:gravity="center_vertical"
android:orientation="horizontal" >
</LinearLayout>
</HorizontalScrollView>

featured.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="160dp"
android:layout_margin="4dp"
android:layout_height="match_parent"
android:orientation="vertical" >


<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>


<ProgressBar
android:layout_width="15dip"
android:layout_height="15dip"
android:id="@+id/progress"
android:layout_centerInParent="true"
/>


<ImageView
android:id="@+id/image"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#20000000"
/>


<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="30dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:gravity="center"
android:textColor="#000000"
android:background="#ffffff"
android:text="Image Text" />


</RelativeLayout>
</LinearLayout>

Java Code:

 LayoutInflater inflater;


inflater=getLayoutInflater();
LinearLayout inLay=(LinearLayout) findViewById(R.id.innerLay);


for(int x=0;x<10;x++)
{
inLay.addView(getView(x));
}








View getView(final int x)
{
View rootView = inflater.inflate( R.layout.featured_item,null);


ImageView image = (ImageView) rootView.findViewById(R.id.image);


//Thease Two Line is sufficient my dear to implement lazyLoading
AQuery aq = new AQuery(rootView);
String url="http://farm6.static.flickr.com/5035/5802797131_a729dac808_s.jpg";
aq.id(image).progress(R.id.progress).image(url, true, true, 0, R.drawable.placeholder1);
image.setOnClickListener(new OnClickListener() {


@Override
public void onClick(View arg0) {
Toast.makeText(PhotoActivity.this, "Click Here Postion "+x,


Toast.LENGTH_LONG).show();
}
});
return rootView;
}

Note: to implement lazy loading, please use this link for AQUERY

https://code.google.com/p/android-query/wiki/ImageLoading


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