android : 列表视图自定义

Question

是否可以有一个包含 2 列或更多列的列表视图，可使用分页属性进行操作（即一次列表视图将在单列中仅显示 4 个项目，按下右箭头将显示接下来的 4 个项目）..
您能告诉我实施它的程序或任何想法吗？
谢谢
普奈特

Answer 1

不确定这是否是您要查找的内容，但基本上此代码会根据您用于填充列表的主数据集创建对象子集。它是这样的：

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;

public class MainActivity extends ListActivity {

// Constant for limiting array to match desired number of values in column
private final int NUMBER_OF_ITEMS_IN_COLUMN = 4;

// Index for starting point of array subset
private int mStartingIndex = 0;

// Data set array for list
private String[] mDataSet = new String[]{ 
    "One", "Two", "Three", "Four", "Five", 
    "Six","Seven","Eight", "Nine", "Ten",
    "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", 
    "Sixteen", "Seventeen", "Eightteen", "Nineteen", "Twenty",
 };

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    changeListViewModel(0);
}

private void changeListViewModel(int startingIndex) {

 // Check staring index meets certain criteria
 if(startingIndex < 0) 
  startingIndex = 0;
 else if(startingIndex >= mDataSet.length)
  startingIndex -= NUMBER_OF_ITEMS_IN_COLUMN;

 // Set starting and ending index
 mStartingIndex  = startingIndex;
 int endingIndex = startingIndex + NUMBER_OF_ITEMS_IN_COLUMN;

 // Make sure ending index isn't outside the bounds of the data set array
 if(endingIndex > mDataSet.length) endingIndex = mDataSet.length;

 // Create subset and set listview adapter
 String[] subSet = getDataSubset(startingIndex, endingIndex);
 setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, subSet));
}

private String[] getDataSubset(int startingIndex, int endingIndex){

 String[] toRet = new String[endingIndex - startingIndex];

 int index = -1;
 for(int x = startingIndex; x < endingIndex; x++)
  toRet[++index] = mDataSet[x];

 return toRet;
}

/*
 * Called from layout main.xml file
 */
public void backButtonClicked(View v) {
 changeListViewModel(mStartingIndex - NUMBER_OF_ITEMS_IN_COLUMN);
}


/*
 * Called from layout main.xml file
 */
public void nextButtonClicked(View v) {
 changeListViewModel(mStartingIndex + NUMBER_OF_ITEMS_IN_COLUMN);
}
}

这是非常基本的，但它应该能够让你开始。另外，使用类似的方法，您还可以通过一个数据库类将列表视图与 SQLite 数据库联系起来，该数据库类将对象列表作为列表视图的子集返回。

您可以在这里下载源代码：Download Source