我在考虑如何使用 ImageSwitchers 和 Gallery 制作自动幻灯片时遇到了麻烦。我唯一了解的是当您从图库中选择图片时过渡图片之间的动画，例如它们淡入淡出或从左到右移动的方式。
编辑
我的目的是在创建图库并选择每张图片然后使用 imageswitcher 在底部布局上显示所选图片时尝试以相同的方式制作幻灯片。就在这一次，而不是实际点击，我希望图片自动移动（最后一张之后的下一张），就像在 Powerpoints 上一样，显然还有一个计时器。
这是整个类： package project.CaseStudy;
public class Slideshow extends Activity implements ViewFactory {
//---the images to display---
Integer[] imageIDs = {
R.drawable.pic1,
R.drawable.pic2,
R.drawable.pic3,
R.drawable.pic4,
R.drawable.pic5,
R.drawable.pic6,
R.drawable.pic7
};
TextView legend;
TextView imageID;
CheckBox repeat;
CheckBox image;
CheckBox text;
public int picture;
public int pictureCurrentlySelected;
private ImageSwitcher imageSwitcher;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.slideshow);
legend = (TextView) findViewById(R.id.legend);
imageID = (TextView) findViewById(R.id.imagenum);
repeat = (CheckBox) findViewById(R.id.repeat);
image = (CheckBox) findViewById(R.id.number);
text = (CheckBox) findViewById(R.id.text);
//text.setEnabled(true);
//image.setEnabled(true);
//repeat.setEnabled(true);
imageSwitcher = (ImageSwitcher) findViewById(R.id.switcher1);
imageSwitcher.setFactory(this);
imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_in));
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.fade_out));
/*imageSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_in_left));
imageSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,
android.R.anim.slide_out_right));
*/
pictureCurrentlySelected = -1;
Gallery gallery = (Gallery) findViewById(R.id.gallery1);
gallery.setAdapter(new ImageAdapter(this));
gallery.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent,
View v, int position, long id)
{
imageSwitcher.setImageResource(imageIDs[position]);
picture = position;
pictureCurrentlySelected = picture;
check();
}
});
}
public View makeView()
{
ImageView imageView = new ImageView(this);
imageView.setBackgroundColor(0xFF000000);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new
ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
return imageView;
}
public class ImageAdapter extends BaseAdapter
{
private Context context;
private int itemBackground;
public ImageAdapter(Context c)
{
context = c;
//---setting the style---
TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
itemBackground = a.getResourceId(
R.styleable.Gallery1_android_galleryItemBackground, 0);
a.recycle();
}
//---returns the number of images---
public int getCount()
{
return imageIDs.length;
}
//---returns the item---
public Object getItem(int position)
{
return position;
}
//---returns the ID of an item---
public long getItemId(int position)
{
return position;
}
//---returns an ImageView view---
public View getView(int position, View convertView, ViewGroup parent)
{
ImageView imageView = new ImageView(context);
imageView.setImageResource(imageIDs[position]);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
imageView.setLayoutParams(new Gallery.LayoutParams(150, 120));
imageView.setBackgroundResource(itemBackground);
return imageView;
}
}
public void onCheckBoxClickListener(View v)
{
boolean checked = ((CheckBox) v).isChecked();
switch(v.getId()){
case R.id.repeat:
/*if(checked)
{
return;
}*/
break;
case R.id.text:
if(!checked)
legend.setText("");
else
{
if(pictureCurrentlySelected == -1)
{
legend.setText("");
}
else
check();
}
break;
case R.id.number:
if(!checked)
imageID.setText("");
else
{
if(pictureCurrentlySelected == -1)
{
legend.setText("");
}
else
check();
}
break;
}
}
private void check()
{
if(text.isChecked())
{
if(picture == 0)
legend.setText("This is San Fransisco's Bridge. A beautiful Sight!");
else if(picture == 1)
legend.setText("This is the train used to pick up the bitches around town.");
else if(picture == 2)
legend.setText("The outstanding lake of San Fransisco");
else if(picture == 3)
legend.setText("A beautiful view of the city!");
else if(picture == 4)
legend.setText("Beauty at its limit.");
else if(picture == 5)
legend.setText("Town at sunset.");
else
legend.setText("Bridge during within a beautiful sight.");
}
/*else
legend.setText("");*/
if(image.isChecked())
{
if(picture == 0)
imageID.setText("Image number 1");
else if(picture == 1)
imageID.setText("Image number 2");
else if(picture == 2)
imageID.setText("Image number 3");
else if(picture == 3)
imageID.setText("Image number 4");
else if(picture == 4)
imageID.setText("Image number 5");
else if(picture == 5)
imageID.setText("Image number 6");
else
imageID.setText("Image number 7");
}
//else
//legend.setText("");
if(repeat.isChecked())
{
}
//else;
}
}
如果它太复杂而无法理解，请忽略最后两种方法我只是在草绘我的程序，并且最终会在以后修复冗余。
这是 XML 布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Images of San Francisco" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<CheckBox
android:id="@+id/repeat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onCheckBoxClickListener"
android:text="Repeat" />
<CheckBox
android:id="@+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onCheckBoxClickListener"
android:text="Image ID" />
<CheckBox
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="onCheckBoxClickListener"
android:text="Text" />
</LinearLayout>
<Gallery
android:id="@+id/gallery1"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.50" >
<ImageSwitcher
android:id="@+id/switcher1"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</ImageSwitcher>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Image number: " />
<TextView
android:id="@+id/imagenum"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/legend"
android:layout_width="match_parent"
android:layout_height="57dp"
android:text="" />
</LinearLayout>
</LinearLayout>