Android基於ListView實現類似Market分頁加載效果示例

本文實例講述了Android基於ListView實現類似Market分頁加載效果。分享給大家供大家參考，具體如下：

最近幾天研究ListView實現分頁加載和滾動加載,發現可以用listView的OnScroll方法來實現,直接上代碼

ListViewScroll.java

package zy.lucifer.ListViewScroll;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AbsListView.OnScrollListener;
import android.widget.LinearLayout.LayoutParams;
public class ListViewScroll extends Activity {
  /** Called when the activity is first created. */
  private LayoutParams mLayoutParams = new LinearLayout.LayoutParams(
      LinearLayout.LayoutParams.WRAP_CONTENT,
      LinearLayout.LayoutParams.WRAP_CONTENT);
  /**
   * 設置布局顯示目標最大化屬性
   */
  private LayoutParams FFlayoutParams = new LinearLayout.LayoutParams(
      LinearLayout.LayoutParams.FILL_PARENT,
      LinearLayout.LayoutParams.FILL_PARENT);
  ListView listView ;
  private int lastItem = 0;
  LinearLayout loadingLayout;
  private listViewAdapter adapter;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    listView = (ListView) findViewById(R.id.myList);
    Log.i("test", "onCreate(Bundle savedInstanceState)>>>>>>>>>>>>>>>");
    // 線性布局
    LinearLayout layout = new LinearLayout(this);
    // 設置布局 水平方向
    layout.setOrientation(LinearLayout.HORIZONTAL);
    // 進度條
    ProgressBar progressBar = new ProgressBar(this);
    // 進度條顯示位置
    progressBar.setPadding(0, 0, 15, 0);
    // 把進度條加入到layout中
    layout.addView(progressBar, mLayoutParams);
    // 文本內容
    TextView textView = new TextView(this);
    textView.setText("加載中...");
    textView.setGravity(Gravity.CENTER_VERTICAL);
    // 把文本加入到layout中
    layout.addView(textView, FFlayoutParams);
    // 設置layout的重力方向，即對齊方式是
    layout.setGravity(Gravity.CENTER);
    // 設置ListView的頁腳layout
    loadingLayout = new LinearLayout(this);
    loadingLayout.addView(layout, mLayoutParams);
    loadingLayout.setGravity(Gravity.CENTER);
    listView.addFooterView(loadingLayout);
    adapter = new listViewAdapter();
    listView.setAdapter(adapter);
    listView.setOnScrollListener(new OnScrollListener() {
      @Override
      public void onScroll(AbsListView view, int firstVisibleItem,
          int visibleItemCount, int totalItemCount) {
        // TODO Auto-generated method stub
        Log.i("test" , "Scroll>>>first: " + firstVisibleItem + ", visible: " + visibleItemCount + ", total: " + totalItemCount);
        lastItem = firstVisibleItem + visibleItemCount - 1;
        Log.i("test" , "Scroll>>>lastItem:" + lastItem);
        //顯示50條ListItem，即0-49，因為onScroll是在“滑動”執行過之後才觸發，所以用adapter.count<=41作條件
        int scrolllength=101;
        if (adapter.count<=scrolllength) {
          if (firstVisibleItem+visibleItemCount==totalItemCount) {
            adapter.count += 10;
            adapter.notifyDataSetChanged();
            listView.setSelection(lastItem);
            int currentPage=adapter.count/10;
            Toast.makeText(getApplicationContext(), "第"+currentPage+"頁", Toast.LENGTH_LONG).show();
          }
        }
        else {
           listView.removeFooterView(loadingLayout);
        }
      }
      @Override
      public void onScrollStateChanged(AbsListView view, int scrollState) {
        // TODO Auto-generated method stub
      }
    });
  }
  class listViewAdapter extends BaseAdapter {
    int count = 10; /* starting amount */
    public int getCount() {
      return count;
    }
    public Object getItem(int pos) {
      return pos;
    }
    public long getItemId(int pos) {
      return pos;
    }
    public View getView(int pos, View v, ViewGroup p) {
      Log.i("test", "getView>>>pos:" + pos);
      TextView view;
      if (v == null) {
        view = new TextView(ListViewScroll.this);
      } else {
        view = (TextView) v;
      }
      view.setText("ListItem " + pos);
      view.setTextSize(20f);
      view.setGravity(Gravity.CENTER);
      view.setHeight(60);
      return view;
    }
  }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<ListView android:cacheColorHint="#00000000" android:id="@+id/myList"
android:layout_width="fill_parent" android:layout_height="fill_parent"
    >
  </ListView>
</LinearLayout>

更多關於Android相關內容感興趣的讀者可查看本站專題：《Android視圖View技巧總結》、《Android布局layout技巧總結》、《Android圖形與圖像處理技巧總結》、《Android開發入門與進階教程》、《Android調試技巧與常見問題解決方法匯總》、《Android多媒體操作技巧匯總(音頻,視頻,錄音等)》、《Android基本組件用法總結》及《Android控件用法總結》

希望本文所述對大家Android程序設計有所幫助。