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Functions and usage of viewswitch
2022-07-07 17:36:00 【XLMN】
ViewSwitcher The function and usage of
Represents the view switching component , Multiple view Stack up , Show only one component at a time , When control from one view Switch to another view when , You can specify animation effects ,
To give viewswitcher Add multiple components , Use viewswitcher Of setfactory Method setting viewfactory, And by the viewfactory establish view
public class MainActivity extends Activity {
// Define a constant , Number of applications per screen
public static final int NUMBER_PER_SCREEN = 12;
// Internal classes representing the application
public static class DataItem {
// Application name
public String dataName;
// App icons
public Drawable drawble;
}
// Save the list aggregate
private ArrayList<DataItem> items = new ArrayList<MainActivity.DataItem>();
// Record which screen is currently being displayed ,
private int sceeNo = -1;
// Total number of screens saved
private int screenCount;
ViewSwitcher vs;
// establish Layoutinflater object
LayoutInflater inflater;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.viewswitcher);
inflater = LayoutInflater.from(MainActivity.this);
// Create a containing 40 An element of liset aggregate , Used to simulate inclusion 40 Applications
for (int i = 0; i < 40; i++) {
String label = "" + i;
Drawable dr = getResources().getDrawable(R.drawable.mia5);
DataItem dt = new DataItem();
dt.dataName = label;
dt.drawble = dr;
items.add(dt);
}
// Calculate the total number of screens the application occupies
// The energy of the computing application can be divided NUMBER_PER_SCREEN;
// If it's not divisible , The total number of screens should be the result of division plus 1;
screenCount=items.size()%NUMBER_PER_SCREEN == 0?
items.size()/NUMBER_PER_SCREEN:
items.size()/NUMBER_PER_SCREEN +1;
vs=(ViewSwitcher) findViewById(R.id.viewswitcher);
vs.setFactory(new ViewFactory() {
// Return to one GridView Components
@Override
public View makeView() {
// TODO Auto-generated method stub
// Load components , The actual is GridView Components
return inflater.inflate(R.layout.slidelistview, null);
}
});
// The first screen is displayed when the page is loaded
next(null);
}
public void next(View view) {
// TODO Auto-generated method stub
if (sceeNo < screenCount - 1) {
sceeNo++;
// by ViewSwitcher Animate the component display process
vs.setInAnimation(this, R.anim.slide_in_right);
// by ViewSwitcher Animate the process of component hiding
vs.setInAnimation(this, R.anim.slide_out_left);
// Control what will be displayed on the next screen GridView Corresponding adapter
((GridView) vs.getNextView()).setAdapter(ba);
// Click the button on the right , Show next screen
// After learning gesture detection , You can also use gestures to display the next screen
vs.showNext();
}
}
public void prev(View v) {
// TODO Auto-generated method stub
if (sceeNo > 0) {
sceeNo--;
// by viewswitcher Animate the component display process
vs.setInAnimation(this, android.R.anim.slide_in_left);
// by viewswitcher Animate the process of component hiding
vs.setInAnimation(this, android.R.anim.slide_in_left);
// Control what will be displayed on the next screen gridview Corresponding adapter
((GridView) vs.getNextView()).setAdapter(ba);
// Click the left button to display the previous screen , You can also use gestures
// After learning gesture detection , You can also realize the previous screen through gesture detection
vs.showPrevious();
}
}
// The baseAdapter Responsible for the display of each screen GridView Provide list items
private BaseAdapter ba = new BaseAdapter() {
@Override
public View getView(int arg0, View arg1, ViewGroup arg2) {
// TODO Auto-generated method stub
View view = arg1;
if (arg1 == null) {
// Load the layout file
view = inflater.inflate(R.layout.labelicon,
null);
}
// Get the layout I see in imageview Components , And set the icon for it
ImageView iv = (ImageView) view
.findViewById(R.id.image01);
iv.setImageDrawable(getItem(arg0).drawble);
// obtain
TextView tv = (TextView) view
.findViewById(R.id.textview);
tv.setText(getItem(arg0).dataName);
return view;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
//
return arg0;
}
@Override
public DataItem getItem(int arg0) {
// TODO Auto-generated method stub
// according to screenno Computation first argo List item data
return items.get(sceeNo * NUMBER_PER_SCREEN + arg0);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
// If you have reached the last screen , And the number of applications cannot be divided number——per_screen
if (sceeNo == screenCount - 1
&& items.size() % NUMBER_PER_SCREEN != 0) {
// The number of programs displayed on the last screen is the number of applications number_per_screen Seeking remainder
return items.size() % NUMBER_PER_SCREEN;
}
// Otherwise, the number of programs displayed on each screen is number_per_screen
return NUMBER_PER_SCREEN;
}
};
}
<?xml version="1.0" encoding="utf-8"?><!-- Define a Viewswitcher -->
<ViewSwitcher
android:id="@+id/viewswitcher"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ViewSwitcher>
<!-- Define buttons to scroll to the previous screen -->
<Button
android:id="@+id/but01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:onClick="prev"
android:text="&1t" />
<Button
android:id="@+id/but02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:onClick="next"
android:text="&gt" />
<?xml version="1.0" encoding="utf-8"?> <ImageView
android:id="@+id/image01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center" />
<?xml version="1.0" encoding="utf-8"?> <!-- Animate drag in from right ,duration Specify the duration of the animation -->
<translate
android:duration="@android:integer/config_mediumAnimTime"
android:fromXDelta="100%p"
android:toXDelta="0" />
<?xml version="1.0" encoding="utf-8"?> <!-- Animate the drag in from the left ,duration Specify the duration of the animation -->
<translate
android:duration="@android:integer/config_mediumAnimTime"
android:fromXDelta="-100%p"
android:toXDelta="0" />
<?xml version="1.0" encoding="utf-8"?> 边栏推荐
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