我想实现带有Gallery某些特性的“水平滚动视图”。在 Gallery 中,滚动距离相对较远时,会排成一对,即如果屏幕上显示三张图片,则点击最后一张图片会排列在中心位置。如何按照所述实现“HorizontalScrollView”?
<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;
}
}
如果有任何问题,请告诉我。
祝愉快...
这是我的布局:
<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>
我在代码中使用动态复选框填充它。
<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 代码:
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;
}
我已经在每一行的ListView中创建了一个水平的ListView,如果您只想要单个,则可以执行以下操作
这里我只是创建了视频缩略图的horizontalListView,就像这样
这个想法就是不断地将ImageView添加到HorizontalscrollView的LinearLayout子项中。
注意:在下一次加载之前记得触发.removeAllViews();,否则会添加重复的子项。
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);
}
}
我的HorizontalListView的xml
<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>
还有我的图像视图作为每个子项
<?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" />
如果想要了解更多,可以跟随以下链接,其中包含一些简单的示例:
我使用了类似于水平变量ListView的东西。 唯一的缺点是,它只适用于Android 2.3及更高版本。
使用这个库就像实现一个带有相应适配器的ListView一样简单。该库还提供了一个示例
。