Adapter和AdapterView之间的关系

 /**
* Notifies the attached observers that the underlying data has been changed
* and any View reflecting the data set should refresh itself.
*/
public void notifyDataSetChanged() {
mDataSetObservable.notifyChanged();
}
AdapterView

public interface OnItemLongClickListener {
/**
* Callback method to be invoked when an item in this view has been
* clicked and held.
*... ...
*/
boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id);
}

public interface OnItemClickListener {

    /**
* Callback method to be invoked when an item in this AdapterView has
* been clicked.
*... ...
*/
void onItemClick(AdapterView<?> parent, View view, int position, long id);
}

/**
* Returns the adapter currently associated with this widget.
*... ...
*/
public abstract T getAdapter();
/**
* Sets the adapter that provides the data and the views to represent the data
* in this widget.
*... ...
*/
public abstract void setAdapter(T adapter);

 public boolean performItemClick(View view, int position, long id) {
if (mOnItemClickListener != null) {
playSoundEffect(SoundEffectConstants.CLICK);
if (view != null) {
view.sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
}
mOnItemClickListener.onItemClick(this, view, position, id);
return true;
}
return false;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;

    if (convertView == null) {
        convertView = mLayout.inflate(R.layout....);
        holder = new ViewHolder();
        holder.textView = (TextView) convertView
                .findViewById(R.id.textview);
        ... ...
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }
    holder.textView.setText(mText + position);
    return convertView;
}

/**
 * Responsible for fling behavior. Use {@link #start(int)} to
 * initiate a fling. Each frame of the fling is handled in {@link #run()}.
 * A FlingRunnable will keep re-posting itself until the fling is done.
 *
 */
private class FlingRunnable implements Runnable {
    /**
     * Tracks the decay of a fling scroll
     */
    private final OverScroller mScroller;
    ... ...
}

<com.github.mikephil.charting.charts.PieChart
android:id=”@+id/spread_pie_chart”
android:layout_width=”match_parent”
android:layout_height=”320dip” />

ColorTemplate mCt;
mCt = new ColorTemplate();
mCt.addDataSetColors(ColorTemplate.PASTEL_COLORS, this);
mChart = (PieChart) headView.findViewById(R.id.spread_pie_chart);
mChart.setColorTemplate(mCt);
mChart.setDescription(“”);
mChart.setHoleRadius(30f);
mChart.setTransparentCircleRadius(0f);
mChart.setCenterTextSize(18f);
mChart.setDrawXValues(true);
mChart.setUsePercentValues(true);
mChart.setDrawLegend(false);
// space between slices
mChart.setSliceSpace(1f);
mChart.setDrawHoleEnabled(false);
mChart.setTouchEnabled(false);

ArrayList yVals = new ArrayList();
ArrayList xVals = new ArrayList();
for (int i = 0; i < listDatas.size(); i++) {
    yVals.add(new Entry((float)listDatas.get(i).getProvinceCount(), i));
    xVals.add(listDatas.get(i).getProvinceName());
}
DataSet set1 = new DataSet(yVals, "Content");
ArrayList dataSets = new ArrayList();
dataSets.add(set1);
ChartData data = new ChartData(xVals, dataSets);
mChart.setData(data);