android學習筆記 通用介面卡工具類和ViewHolder工具類
阿新 • • 發佈：2019-02-18
<pre class="java" name="code">/** * 通用介面卡工具類 * Created by bobok on 2016/9/5. */ public abstract class CommonAdapter<T> extends BaseAdapter{ //protected讓子類可以訪問 protected LayoutInflater mInflater; protected Context mContext; protected List<T> mDatas; private int layoutId; public CommonAdapter(Context context, List<T> mDatas,int layoutId) { mInflater=LayoutInflater.from(context); this.mContext = context; this.mDatas = mDatas; this.layoutId=layoutId; } @Override public int getCount() { return mDatas.size(); } @Override public T getItem(int i) { return mDatas.get(i); } @Override public long getItemId(int i) { return i; } @Override public View getView(int i, View view, ViewGroup viewGroup) { //例項化一個ViewHolder物件 ViewHolder viewHolder = ViewHolder.get(mContext,view,viewGroup,layoutId,i); //把viewHolder和當前Item對於的Bean物件給傳出去 convert(viewHolder,getItem(i)); return viewHolder.getConvertView(); } /** * 對外公佈了一個convert方法，把viewHolder和當前Item對於的Bean物件給傳出去 * @param viewHolder * @param t */ public abstract void convert(ViewHolder viewHolder,T t); }
/** * Created by xhb on 2016/2/20. * 通用的ViewHolder工具類 */ public class ViewHolder { //使用SparseArray是因為當鍵值對對映是 Integer--Object 時 SparseArray的效率要比Map高 private SparseArray<View> mViews; private View mConvertView; private int mPosition; private Context mContext; private ViewHolder(Context context, ViewGroup parent, int layoutId, int position) { this.mPosition = position; mContext=context; this.mViews = new SparseArray<>(); mConvertView = LayoutInflater.from(context).inflate(layoutId, parent, false); //設定tag mConvertView.setTag(this); } /** * 拿到一個ViewHolder物件 * * @param context 上下文 * @param convertView 快取佈局 * @param parent 父控制元件 * @param layoutId 佈局id * @param position 位置 * @return */ public static ViewHolder get(Context context, View convertView, ViewGroup parent, int layoutId, int position) { if (convertView == null) { return new ViewHolder(context, parent, layoutId, position); }else { ViewHolder holder = (ViewHolder) convertView.getTag(); //更新position holder.mPosition=position; return holder; } } /** * 通過控制元件的viewId獲取對應的控制元件，如果沒有則加入views * * @param viewId * @param <T> * @return */ public <T extends View> T getView(int viewId) { View view = mViews.get(viewId); if (view == null) { view = mConvertView.findViewById(viewId); mViews.put(viewId, view); } return (T) view; } public View getConvertView() { return mConvertView; } /** * 給TextView設定值 * @param viewId 控制元件id * @param text 值 * @return */ public ViewHolder setText(int viewId,String text){ TextView tv =getView(viewId); tv.setText(text); return this; } /** * 給TextView設定字型顏色 * @param viewId * @param textColor * @return */ public ViewHolder setTextColor(int viewId, int textColor) { TextView view = getView(viewId); view.setTextColor(textColor); return this; } /** * 給TextView設定顏色 * @param viewId * @param textColorRes 顏色id * @return */ public ViewHolder setTextColorRes(int viewId, int textColorRes) { TextView view = getView(viewId); view.setTextColor(mContext.getResources().getColor(textColorRes)); return this; } /** * 給TextView設定連結 * @param viewId * @return */ public ViewHolder linkify(int viewId) { TextView view = getView(viewId); Linkify.addLinks(view, Linkify.ALL); return this; } /** * 給ImageView設定ImageResource * @param viewId 控制元件id * @param resId 資源id * @return */ public ViewHolder setImageResource(int viewId,int resId){ ImageView iv= getView(viewId); iv.setImageResource(resId); return this; } /** * 給ImageView設定ImageResource使用Frsesco * @param uri 資源uri * @return */ public ViewHolder setImageResourcewithFresco(int viewId,Uri uri){ SimpleDraweeView draweeView=getView(viewId); draweeView.setImageURI(uri); return this; } /** * 給ImageView設定bitmap * @param viewId * @param bitmap * @return */ public ViewHolder setImageBitmap(int viewId,Bitmap bitmap){ ImageView iv= getView(viewId); iv.setImageBitmap(bitmap); return this; } /** * 載入網路圖片使用xutils * @param viewId * @param uri * @return */ public ViewHolder setImageURIWithXutils(int viewId,String uri){ ImageView iv= getView(viewId); x.image().bind(iv,uri); return this; } /** * 給ImageView設定drawable * @param viewId * @param drawable * @return */ public ViewHolder setImageDrawable(int viewId, Drawable drawable) { ImageView view = getView(viewId); view.setImageDrawable(drawable); return this; } /** * 給控制元件設定背景顏色 * @param viewId * @param color * @return */ public ViewHolder setBackgroundColor(int viewId, int color) { View view = getView(viewId); view.setBackgroundColor(color); return this; } /** * 給控制元件設定背景圖片 * @param viewId * @param backgroundRes * @return */ public ViewHolder setBackgroundRes(int viewId, int backgroundRes) { View view = getView(viewId); view.setBackgroundResource(backgroundRes); return this; } /** * 設定透明度 * @param viewId * @param value * @return */ @SuppressLint("NewApi") public ViewHolder setAlpha(int viewId, float value) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { getView(viewId).setAlpha(value); } else { // Pre-honeycomb hack to set Alpha value AlphaAnimation alpha = new AlphaAnimation(value, value); alpha.setDuration(0); alpha.setFillAfter(true); getView(viewId).startAnimation(alpha); } return this; } /** * 設定控制元件是否可見 * @param viewId * @param visible * @return */ public ViewHolder setVisible(int viewId, boolean visible) { View view = getView(viewId); view.setVisibility(visible ? View.VISIBLE : View.GONE); return this; } /** *設定字型型別 * @param typeface * @param viewIds * @return */ public ViewHolder setTypeface(Typeface typeface, int... viewIds) { for (int viewId : viewIds) { TextView view = getView(viewId); view.setTypeface(typeface); view.setPaintFlags(view.getPaintFlags() | Paint.SUBPIXEL_TEXT_FLAG); } return this; } /** *點選事件 */ public ViewHolder setOnClickListener(int viewId, View.OnClickListener listener) { View view = getView(viewId); view.setOnClickListener(listener); return this; } /** * 設定進度條 * @param viewId * @param progress * @return */ public ViewHolder setProgress(int viewId, int progress) { ProgressBar view = getView(viewId); view.setProgress(progress); return this; } /** * 設定進度條 * @param viewId * @param progress * @param max * @return */ public ViewHolder setProgress(int viewId, int progress, int max) { ProgressBar view = getView(viewId); view.setMax(max); view.setProgress(progress); return this; } public ViewHolder setMax(int viewId, int max) { ProgressBar view = getView(viewId); view.setMax(max); return this; } public ViewHolder setRating(int viewId, float rating) { RatingBar view = getView(viewId); view.setRating(rating); return this; } public ViewHolder setRating(int viewId, float rating, int max) { RatingBar view = getView(viewId); view.setMax(max); view.setRating(rating); return this; } /** * 設定標籤 * @param viewId * @param tag * @return */ public ViewHolder setTag(int viewId, Object tag) { View view = getView(viewId); view.setTag(tag); return this; } /** * 設定標籤 * @param viewId * @param key * @param tag * @return */ public ViewHolder setTag(int viewId, int key, Object tag) { View view = getView(viewId); view.setTag(key, tag); return this; } /** * 設定是否選中 * @param viewId * @param checked * @return */ public ViewHolder setChecked(int viewId, boolean checked) { Checkable view = (Checkable) getView(viewId); view.setChecked(checked); return this; } /** * 觸控事件 * @param viewId * @param listener * @return */ public ViewHolder setOnTouchListener(int viewId, View.OnTouchListener listener) { View view = getView(viewId); view.setOnTouchListener(listener); return this; } /** * 長按事件 * @param viewId * @param listener * @return */ public ViewHolder setOnLongClickListener(int viewId, View.OnLongClickListener listener) { View view = getView(viewId); view.setOnLongClickListener(listener); return this; } }