Tuesday, June 26, 2012
A while ago in the study how to customize the ListView
Now share for everyone
Imagine a ListView may be so long
If you use the built-the ListView SampleAdapter at most, you become so
If we want to plug plug Button or plug you want to put things how to do?
Very simple to use BaseAdapter can easily be done
First, we look at what is BaseAdapter
BaseAdapter is a super useful categories it allows you to define many kinds of View
For example, Spinner, ListView, GridView
We want to how to define an own ListView?
First, we open a new Project called MyListView
To let MyListView inherit the ListActivity (Note! Not the Activity!)
Add a new category called MyAdapter and inheritance BaseAdapter
You will find the need to override the four methods, namely,
If you are using eclipse should automatically generate these four methods
These four methods to explain a little
We know that the ListView is composed of a one
Each column we can see it as a View
Combined is a whole ListView
GetCount () is made in the end the number of column method
If we are to make a column is to use the getItem () method
If you want to obtain the id of a column the use getItemId () this method
Then one of our most important methods to make changes to View the contents of a column
Is to use getView () this method
First, change into how good you want to ListView?
Suppose we want a Button of the first plug and then plug a picture last plus the text description
May be president like this
Then we started!
First in the establishment of a list.xml inside plus a
This is the point into the first one to see the screen
Again is increase of adapter.xml a
Which is put in each column of the ListView will lay down according to what we want
My Layout is set for RelativeLayout thus associated property
Then we MyListView which specify the main.xml for the beginning of the screen
setContentView (R.layout.list);
Then to set MyAdapter for the ListView Adapter
setListAdapter (new MyAdapter (this));
Then change to MyAdapter.java
We started several variables will be defined
private LayoutInflater adapterLayoutInflater;
And then declared in the constructor which reads MyListView Context
adapterLayoutInflater = LayoutInflater.from (c);
Example because it is so we simply use the three good
We will therefore return is set to 3
public int getCount () {
/ / TODO Auto-generated method stub
return 3;
}
Again to obtain the view of the order
First Button again ImageView then TextView
Therefore, we declare as a category to read the column setTag property
Then we read it in getView method which
Again is to set the map or the text of the three components above
This all set the column view return the
As a result, we made the ListView and you're done
If you go according to the above procedure should be able to see such a picture
If you did not succeed does not matter to download this file slowly reference should not be difficult to
http://uploadingit.com/file/me7o3idnetl93ves/BaseAdapterChangeListView.zip
Which side there something wrong please do correct me avoid misleading you Thank you
PS. Random change
In a random order set
PS2. Was reflected in the the ListView point it did not respond to it is inserted into the relationship between the Button
Focus the properties Button snatched away so you as long as the xml file inside the properties of the Button to add this line
android: focusable = "false"
You will find can click on ListView
Refer to the website
http://iamshiao.blogspot.com/2010/12/androidbaseadapterlistview.html
http://www.iteye.com/topic/540423
http://developer.android.com/reference/android/widget/ListView.html
http://developer.android.com/reference/android/widget/BaseAdapter.html
http://disanji.net/2010/11/25/android-baseadapter-spinner-listview-gridview/
Now share for everyone
Imagine a ListView may be so long
If you use the built-the ListView SampleAdapter at most, you become so
| title mouth context |
| title mouth context |
| title mouth context |
| title mouth context |
| title mouth context |
If we want to plug plug Button or plug you want to put things how to do?
Very simple to use BaseAdapter can easily be done
First, we look at what is BaseAdapter
BaseAdapter is a super useful categories it allows you to define many kinds of View
For example, Spinner, ListView, GridView
We want to how to define an own ListView?
First, we open a new Project called MyListView
To let MyListView inherit the ListActivity (Note! Not the Activity!)
Add a new category called MyAdapter and inheritance BaseAdapter
You will find the need to override the four methods, namely,
int getCount() Object getItem(int position) long getItemId(int position) View getView(int position, View view, ViewGroup parent) If you are using eclipse should automatically generate these four methods
These four methods to explain a little
We know that the ListView is composed of a one
Each column we can see it as a View
Combined is a whole ListView
GetCount () is made in the end the number of column method
If we are to make a column is to use the getItem () method
If you want to obtain the id of a column the use getItemId () this method
Then one of our most important methods to make changes to View the contents of a column
Is to use getView () this method
First, change into how good you want to ListView?
Suppose we want a Button of the first plug and then plug a picture last plus the text description
May be president like this
| button in Figure text |
| button in Figure text |
| button in Figure text |
| button in Figure text |
| button in Figure text |
Then we started!
First in the establishment of a list.xml inside plus a
This is the point into the first one to see the screen
Again is increase of adapter.xml a
Which is put in each column of the ListView will lay down according to what we want
My Layout is set for RelativeLayout thus associated property
<Button android:id="@+id/AdapterButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="5px"> <!-- 位置要調整好放在左邊--> </Button> <ImageView android:id="@+id/AdapterImage" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@+id/AdapterButton"<!-- 設定在Button的右邊--> android:layout_marginLeft="25px"> </ImageView> <TextView android:id="@+id/AdapterText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@+id/AdapterImage" <!-- 設定在ImageView的右邊--> android:layout_marginLeft="45px"> </TextView>
Then we MyListView which specify the main.xml for the beginning of the screen
setContentView (R.layout.list);
Then to set MyAdapter for the ListView Adapter
setListAdapter (new MyAdapter (this));
Then change to MyAdapter.java
We started several variables will be defined
private LayoutInflater adapterLayoutInflater;
And then declared in the constructor which reads MyListView Context
adapterLayoutInflater = LayoutInflater.from (c);
Example because it is so we simply use the three good
We will therefore return is set to 3
public int getCount () {
/ / TODO Auto-generated method stub
return 3;
}
Again to obtain the view of the order
First Button again ImageView then TextView
Therefore, we declare as a category to read the column setTag property
public class TagView{ Button button; ImageView image; TextView text; public TagView(Button button,ImageView image, TextView text){ this.button = button; this.image = image; this.text = text; } }
Then we read it in getView method which
TagView tag; tag = new TagView( (Button)view.findViewById(R.id.AdapterButton), (ImageView)view.findViewById(R.id.AdapterImage), (TextView)view.findViewById(R.id.AdapterText)); view.setTag(tag);
Again is to set the map or the text of the three components above
tag.image.setBackgroundResource(R.drawable.icon); tag.button.setText("button"+position); tag.text.setText("text"+position);
This all set the column view return the
return view;
As a result, we made the ListView and you're done
If you go according to the above procedure should be able to see such a picture
If you did not succeed does not matter to download this file slowly reference should not be difficult to
Which side there something wrong please do correct me avoid misleading you Thank you
PS. Random change
PS2. Was reflected in the the ListView point it did not respond to it is inserted into the relationship between the Button
Focus the properties Button snatched away so you as long as the xml file inside the properties of the Button to add this line
android: focusable = "false"
You will find can click on ListView
Refer to the website
http://iamshiao.blogspot.com/2010/12/androidbaseadapterlistview.html
http://www.iteye.com/topic/540423
http://developer.android.com/reference/android/widget/ListView.html
http://developer.android.com/reference/android/widget/BaseAdapter.html
http://disanji.net/2010/11/25/android-baseadapter-spinner-listview-gridview/