怎么在Android中實(shí)現(xiàn)一個(gè)ListView點(diǎn)擊展開收起效果?相信很多沒有經(jīng)驗(yàn)的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個(gè)問題。
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布局文件:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <!--提示框--> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="請選擇您的類型:" android:textSize="30sp" android:textColor="#ffffffff" android:paddingLeft="5dp" android:paddingTop="5dp" android:paddingBottom="5dp" android:background="#ff000000"/> <!--定義一個(gè)ExpandableListView組件--> <ExpandableListView android:id="@+id/list" android:layout_width="match_parent" android:layout_height="match_parent"> </ExpandableListView> </LinearLayout>
然后就是具體實(shí)現(xiàn):
這里主要是添加幾個(gè)必須的屬性 大多數(shù)方法不用重寫
參考我代碼中的位置稍加改動(dòng)就行
public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //創(chuàng)建一個(gè)ExpandableListAdapter對象 final ExpandableListAdapter adapter = new ExpandableListAdapter() { int[] logos = new int[]{ R.drawable.human1st, R.drawable.human1st, R.drawable.human2nd, R.drawable.human3rd }; private String[] humanTypes = new String[]{ "不是人","聰明人","普通人","我這樣的人" }; private String[][] humans = new String[][]{ {"上仙","大神","荷蘭豬"}, {"超人","一般聰明人","假的聰明人"}, {"努力的人","快樂的普通人","苦逼的普通人"}, {"天才","傻逼","蠢萌"} }; //獲得制定組的位置、指定子列表項(xiàng)處的字列表項(xiàng)數(shù)據(jù) private TextView getTextView(){ AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,164); TextView textView = new TextView(MainActivity.this); textView.setLayoutParams(layoutParams); textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT); textView.setPadding(36,0,0,0); textView.setTextSize(30); return textView; } @Override public void registerDataSetObserver(DataSetObserver observer) { } @Override public void unregisterDataSetObserver(DataSetObserver observer) { } @Override public int getGroupCount() { return humanTypes.length; } @Override public int getChildrenCount(int groupPosition) { return humans[groupPosition].length; } //獲取制定組位置處的組數(shù)據(jù) @Override public Object getGroup(int groupPosition) { return humanTypes[groupPosition]; } @Override public Object getChild(int groupPosition, int childPosition) { return humans[groupPosition][childPosition]; } @Override public long getGroupId(int groupPosition) { return groupPosition; } @Override public long getChildId(int groupPosition, int childPosition) { return childPosition; } @Override public boolean hasStableIds() { return true; } //該方法決定每個(gè)組選項(xiàng)的外觀 @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { LinearLayout linearLayout = new LinearLayout(MainActivity.this); linearLayout.setOrientation(LinearLayout.HORIZONTAL); ImageView logo = new ImageView(MainActivity.this); logo.setImageResource(logos[groupPosition]); linearLayout.addView(logo); TextView textView = getTextView(); textView.setText(getGroup(groupPosition).toString()); linearLayout.addView(textView); // linearLayout.setMinimumHeight(50); return linearLayout; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { TextView textView = getTextView(); textView.setText(getChild(groupPosition,childPosition).toString()); return textView; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } @Override public boolean areAllItemsEnabled() { return false; } @Override public boolean isEmpty() { return false; } @Override public void onGroupExpanded(int groupPosition) { } @Override public void onGroupCollapsed(int groupPosition) { } @Override public long getCombinedChildId(long groupId, long childId) { return 0; } @Override public long getCombinedGroupId(long groupId) { return 0; } }; ExpandableListView expandableListView = (ExpandableListView) findViewById(R.id.list); expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { Toast.makeText(MainActivity.this,"你是一個(gè):" + adapter.getChild(groupPosition,childPosition),Toast.LENGTH_SHORT).show(); return true; } }); expandableListView.setAdapter(adapter); } }
看完上述內(nèi)容,你們掌握怎么在Android中實(shí)現(xiàn)一個(gè)ListView點(diǎn)擊展開收起效果的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道,感謝各位的閱讀!
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