请协助我在 ListView 中实施 MP 折线图；它在回收站视图中效果很好，但是当我添加超过 5 个项目时它会丢失它的大小。由于滚动视图，我使用扩展的 listView 来减少问题，但图表看起来像这样。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_margin="10sp"
android:orientation="vertical"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold"
android:textColor="@color/black"
android:text="@string/most_active_stocks"/>
<LinearLayout
android:visibility="visible"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center"
android:gravity="center"
android:layout_margin="10sp">
<Button
android:layout_width="wrap_content"
android:textSize="10sp"
android:layout_gravity="center"
android:layout_height="40dp"
android:layout_margin="5dp"
android:background="@drawable/virtualtrading_button"
android:text="Volume"
android:gravity="center"
android:textColor="@color/black" />
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:textSize="10sp"
android:layout_gravity="center"
android:layout_margin="5dp"
android:background="@drawable/virtualtrading_button"
android:text="%Turnover"
android:gravity="center"
android:textColor="@color/black" />
<Button
android:layout_width="wrap_content"
android:layout_height="40dp"
android:textSize="10sp"
android:layout_margin="5dp"
android:layout_gravity="center"
android:background="@drawable/virtualtrading_button"
android:text="Range"
android:gravity="center"
android:textColor="@color/black" />
</LinearLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<com.catalyst.maksl.Components.ExpandableHeightListView
android:id="@+id/moverlist"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:drawSelectorOnTop="false"
android:fadingEdge="vertical"
android:divider="@android:color/transparent"
android:dividerHeight="5dp"
android:fitsSystemWindows="true"
android:listSelector="#00000000"
android:scrollbars="none"
android:smoothScrollbar="true" />
</RelativeLayout>
</LinearLayout>
ExpandableListView 类
public class ExpandableHeightListView extends ListView {
boolean expanded = false;
public ExpandableHeightListView(Context context)
{
super(context);
}
public ExpandableHeightListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}
public ExpandableHeightListView(Context context, AttributeSet attrs,int defStyle)
{
super(context, attrs, defStyle);
}
public boolean isExpanded()
{
return expanded;
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
// HACK! TAKE THAT ANDROID!
if (isExpanded())
{
// Calculate entire height by providing a very large height hint.
// But do not use the highest 2 bits of this integer; those are
// reserved for the MeasureSpec mode.
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);
ViewGroup.LayoutParams params = getLayoutParams();
params.height = getMeasuredHeight();
}
else
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
public void setExpanded(boolean expanded)
{
this.expanded = expanded;
}
}
适配器类：
public class MostActiveStocksAdapter extends BaseAdapter {
private static LineDataSet set1;
public static Drawable drawablePositive = ContextCompat.getDrawable(Logs.globalContext, R.drawable.graph_green_bg);
public static Drawable drawable_negative = ContextCompat.getDrawable(Logs.globalContext, R.drawable.graph_bg);
Context context;
private Double changePercentage;
ArrayList<String> arrayList = new ArrayList<String>();
LayoutInflater mInflater = null;
private ViewHolder holder;
public ArrayList<Entry> values;
public LineData data;
public MostActiveStocksAdapter(Context context, ArrayList<String> arrayList) {
this.context = context;
this.arrayList = arrayList;
mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int position) {
return arrayList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.most_active_stocks_listitem, null);
holder = new ViewHolder();
holder.moverSymbolName = (TextView) convertView.findViewById(R.id.moversymbolName);
holder.moverScripName = (AutoResizeTextView) convertView.findViewById(R.id.moversmainSymbolName);
holder.moverLastTradePrice = (TextView) convertView.findViewById(R.id.moverslastTradePrice);
holder.moverchange = (AutoResizeTextView) convertView.findViewById(R.id.moversindexChange);
holder.moverMarket = (TextView) convertView.findViewById(R.id.moverssymbolMarket);
holder.sector = convertView.findViewById(R.id.movertextSector);
holder.nameIcon = convertView.findViewById(R.id.moverNameicon);
holder.masLineChart = convertView.findViewById(R.id.moversgraph);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
ScripBean scripBean = Logs.allScripBean.get(arrayList.get(position));
MostActiveStockMarketFeedBean marketFeedBean = Logs.mostActiveStockMarketFeedBeanHashMap.get(arrayList.get(position));
if (marketFeedBean != null) {
changePercentage = marketFeedBean.getChange() / (marketFeedBean.getLastTradePrice() - marketFeedBean.getChange()) * 100;
holder.moverScripName.setText(marketFeedBean.getScrip());
holder.moverSymbolName.setText(marketFeedBean.getScripName());
holder.sector.setText(scripBean.getSectorName());
holder.nameIcon.setText(marketFeedBean.getScrip().substring(0,1));
holder.moverLastTradePrice.setText(Logs.priceFormat.format(marketFeedBean.getLastTradePrice()).replace("-", ""));
setData(5,3);
customiseChart();
if(marketFeedBean.getChange() != 0.0) {
if (Logs.priceFormat.format(changePercentage).contains("-")) {
holder.moverLastTradePrice.setBackground(context.getResources().getDrawable(R.drawable.bg_negativecell));
}
else
{
holder.moverLastTradePrice.setBackground(context.getResources().getDrawable(R.drawable.bg_positivecell));
}
holder.moverchange.setText(marketFeedBean.getChange() + " " + "(" + Logs.priceFormat.format(changePercentage).replace("-", "") + "%)");
}
else
{
holder.moverchange.setText("(0.00%)");
}
}
else {
String sm = arrayList.get(position);
holder.moverScripName.setText(sm.split("\\:", -1)[0]);
holder.moverMarket.setText(sm.split("\\:", -1)[1]);
holder.moverSymbolName.setText("");
holder.moverLastTradePrice.setText("0.00");
holder.moverchange.setText("0.00");
}
return convertView;
}
private void setData(int count, float range) {
values = new ArrayList<>();
for (int i = 0; i < count; i++) {
float val = (float) (Math.random() * range) - 30;
values.add(new Entry(i, val));
}
set1 = new LineDataSet(values, "DataSet 1");
set1.setDrawCircles(false);
set1.setDrawFilled(true);
set1.setLineWidth(1f);
set1.setColor(Color.GREEN);
set1.setMode(LineDataSet.Mode.CUBIC_BEZIER);
set1.setDrawFilled(true);
set1.setFillDrawable(drawablePositive);
set1.setFillFormatter(new IFillFormatter() {
@Override
public float getFillLinePosition(ILineDataSet dataSet, LineDataProvider dataProvider) {
return holder.masLineChart.getAxisLeft().getAxisMinimum();
}
});
ArrayList<ILineDataSet> dataSets = new ArrayList<>();
dataSets.add(set1);
data = new LineData(dataSets);
holder.masLineChart.setData(data);
}
private void customiseChart()
{
holder.masLineChart.getDescription().setEnabled(false);
holder.masLineChart.setDrawGridBackground(false);
holder.masLineChart.setDragEnabled(false);
holder.masLineChart.getLegend().setEnabled(false);
holder.masLineChart.setScaleEnabled(true);
holder.masLineChart.setScaleYEnabled(false);
holder.masLineChart.setScaleXEnabled(true);
holder.masLineChart.setDrawGridBackground(false);
holder.masLineChart.getXAxis().setEnabled(false);
holder.masLineChart.getLineData().setDrawValues(false);
holder.masLineChart.getXAxis().setDrawGridLines(false);
holder.masLineChart.getXAxis().setDrawAxisLine(false);
holder.masLineChart.getAxisLeft().setDrawGridLines(false);
holder.masLineChart.getAxisRight().setDrawGridLines(false);
holder.masLineChart.getAxisRight().setDrawZeroLine(true);
holder.masLineChart.getAxisLeft().setDrawZeroLine(true);
holder.masLineChart.getAxisRight().setDrawLabels(false);
holder.masLineChart.getAxisLeft().setDrawLabels(false);
holder.masLineChart.getAxisLeft().setEnabled(false);
holder.masLineChart.getAxisRight().setEnabled(true);
holder.masLineChart.getAxisRight().setZeroLineColor(Color.BLACK);
holder.masLineChart.getAxisRight().setAxisLineColor(Color.BLACK);
holder.masLineChart.setMaxHighlightDistance(150);
holder.masLineChart.setViewPortOffsets(0, 0, 0, 0);
holder.masLineChart.setTouchEnabled(false);
holder.masLineChart.setPinchZoom(false);
}
private class ViewHolder {
TextView moverSymbolName;
TextView moverMarket;
AutoResizeTextView moverScripName;
TextView moverLastTradePrice;
AutoResizeTextView moverchange;
TextView sector;
TextView nameIcon;
LineChart masLineChart;
}
PS：这个 ListView 在片段中。
