Android 滑动效果代码分享

ORIETech - Mobile Application Development

package com.ScrollListView;

import android.app.ListActivity;

import android.os.Bundle;

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.ProgressBar;

import android.widget.TextView;

import android.widget.AbsListView.OnScrollListener;

publicclass EndLessActivity extends ListActivity implements OnScrollListener {

Aleph0 adapter =new Aleph0();

int mProgressStatus =0;

ProgressBar progressBar;

protectedvoid onCreate(Bundle
savedInstanceState) {

super.onCreate(savedInstanceState);

LinearLayout searchLayout =new LinearLayout(this);

searchLayout.setOrientation(LinearLayout.HORIZONTAL);

progressBar =new ProgressBar(this);

progressBar.setPadding(0, 0, 15, 0);

searchLayout.addView(progressBar,new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT

));

TextView textView =new TextView(this);

textView.setText("加载中...");

textView.setGravity(Gravity.CENTER_VERTICAL);

searchLayout.addView(textView,new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.FILL_PARENT,

LinearLayout.LayoutParams.FILL_PARENT

));

searchLayout.setGravity(Gravity.CENTER);

LinearLayout loadingLayout =new LinearLayout(this);

loadingLayout.addView(searchLayout,new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT

));

loadingLayout.setGravity(Gravity.CENTER);

getListView().addFooterView(loadingLayout);

setListAdapter(adapter);

getListView().setOnScrollListener(this);

}

publicvoid onScroll(AbsListView
view,

int firstVisible, int visibleCount, int totalCount) {

boolean loadMore =/* maybe
add a padding */

firstVisible + visibleCount >= totalCount;

if(loadMore) {

adapter.count += visibleCount; // or
any other amount

adapter.notifyDataSetChanged();

}

}

publicvoid onScrollStateChanged(AbsListView
v, int s) { }

class Aleph0 extends BaseAdapter {

int count =40; /* starting amount */

publicint getCount() { return count; }

public Object getItem(int pos) { return pos; }

publiclong getItemId(int pos) { return pos; }

public View getView(int pos, View v, ViewGroup p) {

TextView view =new TextView(EndLessActivity.this);

view.setText("entry "+ pos);

return view;

}

}

}

listview下部是按钮控制：

package com.ScrollListView;

import android.app.ListActivity;

import android.os.Bundle;

import android.view.Gravity;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AbsListView;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.LinearLayout;

import android.widget.ProgressBar;

import android.widget.TextView;

import android.widget.AbsListView.OnScrollListener;

publicclass EndLessActivity extends ListActivity {

Aleph0 adapter =new Aleph0();

int mProgressStatus =0;

protectedvoid onCreate(Bundle
savedInstanceState) {

super.onCreate(savedInstanceState);

LinearLayout searchLayout =new LinearLayout(this);

searchLayout.setOrientation(LinearLayout.HORIZONTAL);

Button textView =new Button(this);

textView.setText("加载中...");

textView.setGravity(Gravity.CENTER_VERTICAL);

searchLayout.addView(textView,new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.FILL_PARENT,

LinearLayout.LayoutParams.FILL_PARENT

));

searchLayout.setGravity(Gravity.CENTER);

LinearLayout loadingLayout =new LinearLayout(this);

loadingLayout.addView(searchLayout,new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT,

LinearLayout.LayoutParams.WRAP_CONTENT

));

loadingLayout.setGravity(Gravity.CENTER);

getListView().addFooterView(loadingLayout);

textView.setOnClickListener(new Button.OnClickListener()

{ @Override

publicvoid onClick(View v)

{

adapter.count +=10;

adapter.notifyDataSetChanged();

}

});

setListAdapter(adapter);

//getListView().setOnScrollListener(this);

}

/*public void onScroll(AbsListView view,

int firstVisible, int visibleCount, int totalCount) {

boolean loadMore =

firstVisible + visibleCount >= totalCount;

if(loadMore) {

adapter.count += visibleCount;

adapter.notifyDataSetChanged();

}

} */

publicvoid onScrollStateChanged(AbsListView
v, int s) { }

class Aleph0 extends BaseAdapter {

int count =40; /* starting amount */

publicint getCount() { return count; }

public Object getItem(int pos) { return pos; }

publiclong getItemId(int pos) { return pos; }

public View getView(int pos, View v, ViewGroup p) {

TextView view =new TextView(EndLessActivity.this);

view.setText("entry "+ pos);

return view;

}

}

}