Android开发之HorizontalScrollView控件使用案例介绍

HorizontalScrollView和平时我们使用的ListView、GridView、ScrollView差不多，也属于一个滚动视图控件，当在一个有限的屏幕内，尺寸大小没能够完全显示所有的内容，添加HorizontalScrollView控件后可以滑动显示剩余的内容。HorizontalScrollView采用的是一个FrameLayout布局，我们放置子控件的时候，必须放在HorizontalScrollView的下面，可以是一个控件也可以是一个布局文件，但是这个布局文件我们使用比较多的是一个水平的LinearLayout。例子，效果图：

代码：activity_main.xml
[sourcecode]
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/horizontalScrollView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<LinearLayout
android:id="@+id/mygallery"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
</LinearLayout>

</HorizontalScrollView>
[/sourcecode]
Java代码：MainActivity.java
[java]
package cn.teachcourse.horizontalsrollview;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class MainActivity extends Activity {
LinearLayout mLinearLayout;
private int[] imgs = { R.drawable.img0, R.drawable.img1, R.drawable.img2,
R.drawable.img3, R.drawable.img4, R.drawable.img5, };

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLinearLayout = (LinearLayout) findViewById(R.id.mygallery);

for (int i = 0; i &lt; imgs.length; i++) {
mLinearLayout.addView(getImageView(imgs[i]));
}
}

private View getImageView(int i) {
// TODO Auto-generated method stub
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),i);
LinearLayout layout = new LinearLayout(getApplicationContext());
layout.setLayoutParams(new LayoutParams(250, 250));
layout.setGravity(Gravity.CENTER);

ImageView imageView = new ImageView(this);
imageView.setLayoutParams(new LayoutParams(200, 200));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setImageBitmap(bitmap);
layout.addView(imageView);

return layout;
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}
[/java]