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Android ListView之setEmptyView正確使用方法_Android_腳本之家
privatevoidsetEmptyView(){ emptyTv.setText(getString(R.string.txt_no_data_refreshable)); mList.setEmptyView(empty); } 假如沒有數(shù)據(jù),運行,一切正常。 下面我們執(zhí)行一句代碼后 1 mList.setVisibility(View.VISIBLE); 我們發(fā)現(xiàn),emptyView看不到了,
www.dbjr.com.cn/article/1227...htm 2025-5-27
快速處理ListView為空的情況_Android_腳本之家
empty_listview_lv.setAdapter(newArrayAdapter<String>(this,android.R.layout.simple_list_item_1, mListStr)); empty_listview_lv.setEmptyView(findViewById(R.id.empty_imageview_iv)); } } 這樣當(dāng)我們的數(shù)據(jù)為空的時候可以把empty_listview_lv.setAdapter(null);這樣就會顯示ImageView(注:不需要把ImageView...
www.dbjr.com.cn/article/1114...htm 2025-6-7
Android源碼學(xué)習(xí)之工廠方法模式應(yīng)用及優(yōu)勢介紹_Android_腳本之家
setContentView(com.android.internal.R.layout.list_content_simple); } private AdapterView.OnItemClickListener mOnClickListener = new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View v, int position, long id) { onListItemClick((ListView)parent, v, position,...
www.dbjr.com.cn/article/330...htm 2025-6-13
android下拉刷新ListView的介紹和實現(xiàn)代碼_Android_腳本之家
this.addHeaderView(empty); LayoutInflater inflater=LayoutInflater.from(context); headerView=inflater.inflate(header_layout, null); this.addHeaderView(headerView); this.setRefreshOperation(this); this.context=context; } @Override protected void onLayout(boolean changed, int l, int t, int r, int ...
www.dbjr.com.cn/article/358...htm 2025-6-7
Android控件系列之EditText使用方法_Android_腳本之家
private Boolean isEmpty = true; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); EditText et = (EditText)this.findViewById(R.id.et); ...
www.dbjr.com.cn/article/318...htm 2025-5-30
Android實現(xiàn)搜索保存歷史記錄功能_Android_腳本之家
mOperationTv.setText(R.string.cancel); mEmptyView.hide(); clearKeywordIv.setVisibility(View.GONE); if (mHistoryKeywords.size() > 0) { mSearchHistoryLl.setVisibility(View.VISIBLE); } else { mSearchHistoryLl.setVisibility(View.GONE); } } else { mSearchHistoryLl.setVisibility(Vi...
www.dbjr.com.cn/article/1133...htm 2025-6-5
MySQL 8.0.26版本升級32版本查詢數(shù)據(jù)為空的解決方案_Mysql_腳本之家
greatsql>setoptimizer_switch='derived_condition_pushdown=on'; Query OK, 0rowsaffected (0.00 sec) greatsql>select*from(select*fromt_studentunionselect*fromt_student)tempwherename='湯姆'; Emptyset, 2 warnings (0.00 sec) greatsql>select/*+ NO_DERIVED_CONDITION_PUSHDOWN(temp) */ *from(select*...
www.dbjr.com.cn/database/3179384...htm 2025-5-26
前端實現(xiàn)(excel)xlsx文件預(yù)覽的詳細(xì)步驟_javascript技巧_腳本之家
setSheet(worksheet) // console.log(worksheet.getCell(1, 1).style); // 遍歷工作表中的所有行(包括空行) const sheetData = []; worksheet.eachRow({ includeEmpty: true }, function(row, rowNumber) { // console.log('Row ' + rowNumber + ' = ' + JSON.stringify(row.values)); // 使用...
www.dbjr.com.cn/javascript/3168009...htm 2025-6-12