android上拉下拉加载更多数据

标签：layout 上拉下 private content wrap android id 加载

效果图

下拉刷新：

android上拉下拉加载更多数据_android

加载更多：

android上拉下拉加载更多数据_java_02

CustomListView.java

[java] view plain copy

package
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
/**
* ListView下拉刷新
*
*/
public class CustomListView extends ListView implements
private final static int RELEASE_To_REFRESH = 0;
private final static int PULL_To_REFRESH = 1;
private final static int REFRESHING = 2;
private final static int DONE = 3;
private final static int LOADING = 4;
// 实际的padding的距离与界面上偏移距离的比例
private final static int RATIO = 3;
private
private
private
private
private
private
private
private
// 用于保证startY的值在一个完整的touch事件中只被记录一次
private boolean
private int
private int
private int
private int
private int
private boolean
private
private
private boolean
private
private
private
public
super(context);
init(context);
}
public
super(context, attrs);
init(context);
}
private void
setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
null);
arrowImageView = (ImageView) headView.findViewById(R.id.head_arrowImageView);
70);
50);
progressBar = (ProgressBar) headView.findViewById(R.id.head_progressBar);
tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);
lastUpdatedTextView = (TextView) headView.findViewById(R.id.head_lastUpdatedTextView);
measureView(headView);
headContentHeight = headView.getMeasuredHeight();
headContentWidth = headView.getMeasuredWidth();
0, -1 * headContentHeight, 0, 0);
headView.invalidate();
"size", "width:" + headContentWidth + " height:"
null, false);
this);
new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
new
250);
true);
new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
new
200);
true);
state = DONE;
false;
null);
moreView.setVisibility(View.VISIBLE);
moreProgressBar = (ProgressBar) moreView.findViewById(R.id.pull_to_refresh_progress);
loadMoreView = (TextView) moreView.findViewById(R.id.load_more);
new
@Override
public void
onLoad();
}
});
addFooterView(moreView);
}
public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int
firstItemIndex = firstVisiableItem;
}
public void onScrollStateChanged(AbsListView arg0, int
}
public boolean
if
switch
case
if (firstItemIndex == 0
true;
int) event.getY();
}
break;
case
if
if
}
if
state = DONE;
changeHeaderViewByState();
}
if
state = REFRESHING;
changeHeaderViewByState();
onRefresh();
}
}
false;
false;
break;
case
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0) {
true;
startY = tempY;
}
if
// 保证在设置padding的过程中，当前的位置一直是在head，否则如果当列表超出屏幕的话，当在上推的时候，列表会同时进行滚动
// 可以松手去刷新了
if
0);
// 往上推了，推到了屏幕足够掩盖head的程度，但是还没有推到全部掩盖的地步
if (((tempY - startY) / RATIO < headContentHeight) && (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
// 一下子推到顶了
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
// 往下拉了，或者还没有上推到屏幕顶部掩盖head的地步
}
// 还没有到达显示松开刷新的时候,DONE或者是PULL_To_REFRESH状态
if
0);
// 下拉到可以进入RELEASE_TO_REFRESH的状态
if
state = RELEASE_To_REFRESH;
true;
changeHeaderViewByState();
}
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
}
if
if (tempY - startY > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
}
if
0, -1 * headContentHeight + (tempY - startY) / RATIO, 0, 0);
}
if
0, (tempY - startY) / RATIO - headContentHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
// 当状态改变时候，调用该方法，以更新界面
private void
switch
case
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
"松开刷新");
break;
case
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH状态转变来的
if
false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
"下拉刷新");
else
"下拉刷新");
}
break;
case
0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
"正在刷新...");
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
case
0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.arrow);
"下拉刷新");
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
}
}
public void
this.refreshListener = refreshListener;
true;
}
public void
this.loadListener = loadListener;
}
public interface
public void
}
public interface
public void
}
@SuppressWarnings("deprecation")
public void
state = DONE;
"最近更新:" + new
changeHeaderViewByState();
}
private void
if (loadListener != null) {
moreProgressBar.setVisibility(View.VISIBLE);
loadMoreView.setText(getContext().getString(R.string.load_more));
loadListener.onLoad();
}
}
public void
// moreView.setVisibility(View.GONE);
moreProgressBar.setVisibility(View.GONE);
loadMoreView.setText(getContext().getString(R.string.more_data));
}
private void
if (refreshListener != null) {
refreshListener.onRefresh();
}
}
private void
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null) {
new
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int
int
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
else
0, MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}
@SuppressWarnings("deprecation")
public void
"最近更新:" + new
super.setAdapter(adapter);
}
}

在 CustomListView 中有2个回调接口，OnRefreshListener 和 OnLoadListener ，分别对应下拉和点击加载更多时候的回调函数。在下拉刷新完成之后要调用 mListView.onRefreshComplete(); 来隐藏掉头部，调用 mListView.onLoadComplete(); 隐藏掉底部的加载view。

header.xml

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<RelativeLayout
android:id="@+id/head_contentLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingLeft="30dp" >
<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true" >
<ImageView
android:id="@+id/head_arrowImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:contentDescription="@string/app_name"
android:src="@drawable/arrow" />
<ProgressBar
android:id="@+id/head_progressBar"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:indeterminateDrawable="@drawable/progressbar_bg"
android:visibility="gone" />
</FrameLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal"
android:orientation="vertical" >
<TextView
android:id="@+id/head_tipsTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pull_to_refresh_pull_label"
android:textColor="@color/pull_refresh_textview"
android:textSize="20sp" />
<TextView
android:id="@+id/head_lastUpdatedTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/pull_to_refresh_refresh_lasttime"
android:textColor="@color/gold"
android:textSize="10sp" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>

listfooter_more.xml

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal"
android:orientation="horizontal"
android:padding="15dp"
>
<ProgressBar
android:id="@+id/pull_to_refresh_progress"
style="@android:style/Widget.ProgressBar.Small.Inverse"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:indeterminate="true"
android:visibility="gone" >
</ProgressBar>
<TextView
android:id="@+id/load_more"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10.0dp"
android:gravity="center"
android:text="@string/more_data"
android:textColor="@color/black" >
</TextView>
</LinearLayout>

MainActivity.java

[java] view plain copy

package
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
import
public class MainActivity extends
private static final String TAG = MainActivity.class.getSimpleName();
private static final int LOAD_DATA_FINISH = 10;
private static final int REFRESH_DATA_FINISH = 11;
private List<AppInfo> mList = new
private
private
private int count = 10;
private Handler handler = new
public void
switch
case
if(mAdapter!=null){
mAdapter.notifyDataSetChanged();
}
//下拉刷新完成
break;
case
if(mAdapter!=null){
mAdapter.notifyDataSetChanged();
}
//加载更多完成
break;
default:
break;
}
};
};
@Override
protected void
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buildAppData();
new CustomListAdapter(this);
mListView = (CustomListView) findViewById(R.id.mListView);
mListView.setAdapter(mAdapter);
new
@Override
public void
//TODO 下拉刷新
"onRefresh");
0);
}
});
new
@Override
public void
//TODO 加载更多
"onLoad");
1);
}
});
new
@Override
public void
int position, long
"click position:"
}
});
}
public void loadData(final int
new
@Override
public void
for(int i=count;i<count+10;i++){
new
ai.setAppIcon(BitmapFactory.decodeResource(getResources(),
R.drawable.ic_launcher));
"应用Demo_"
"版本: " + (i % 10 + 1) + "." + (i % 8 + 2) + "."
6 + 3));
"大小: " + i * 10 + "MB");
mList.add(ai);
}
10;
try
300);
catch
e.printStackTrace();
}
if(type==0){ //下拉刷新
// Collections.reverse(mList); //逆序
handler.sendEmptyMessage(REFRESH_DATA_FINISH);
else if(type==1){
handler.sendEmptyMessage(LOAD_DATA_FINISH);
}
}
}.start();
}
/**
* 初始化应用数据
*/
private void
for (int i = 0; i < 10; i++) {
new
ai.setAppIcon(BitmapFactory.decodeResource(getResources(),
R.drawable.ic_launcher));
"应用Demo_"
"版本: " + (i % 10 + 1) + "." + (i % 8 + 2) + "."
6 + 3));
"大小: " + i * 10 + "MB");
mList.add(ai);
}
}
@Override
public boolean
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public class CustomListAdapter extends
private
public
mInflater = LayoutInflater.from(context);
}
@Override
public int
return
}
@Override
public Object getItem(int
return
}
@Override
public long getItemId(int
return
}
@Override
public View getView(int
if (getCount() == 0) {
return null;
}
null;
if (convertView == null) {
null);
new
holder.ivImage = (ImageView) convertView
.findViewById(R.id.ivIcon);
holder.tvName = (TextView) convertView
.findViewById(R.id.tvName);
holder.tvVer = (TextView) convertView.findViewById(R.id.tvVer);
holder.tvSize = (TextView) convertView
.findViewById(R.id.tvSize);
convertView.setTag(holder);
else
holder = (ViewHolder) convertView.getTag();
}
AppInfo ai = mList.get(position);
holder.ivImage.setImageBitmap(ai.getAppIcon());
holder.tvName.setText(ai.getAppName());
holder.tvVer.setText(ai.getAppVer());
holder.tvSize.setText(ai.getAppSize());
return
}
}
public static class
private
private
private
private
}
}

list_item.xml

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="@+id/ivIcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/image_desc"
android:src="@drawable/ic_launcher" />
<LinearLayout
android:id="@+id/appInfo"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:layout_toRightOf="@id/ivIcon"
android:orientation="vertical" >
<TextView
android:id="@+id/tvName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/name"
android:textColor="#000000"
android:textSize="16sp" />
<TextView
android:id="@+id/tvVer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/ver"
android:textColor="#666666"
android:textSize="13sp" />
<TextView
android:id="@+id/tvSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/size"
android:textColor="#666666"
android:textSize="13sp" />
</LinearLayout>
<Button
android:id="@+id/btnClick"
android:layout_width="80dip"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:focusable="false"
android:text="@string/mgr"
android:textColor="#000000"
android:textSize="16sp" />
</RelativeLayout>

标签：layout,上拉下,private,content,wrap,android,id,加载
From： https://blog.51cto.com/u_13657808/5894964

android上拉下拉加载更多数据

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