我仍然對獲得微調項文本感到困惑。 因此,在Activity.class中,我想從Fragment.class獲取微調項文本,但idk如何從片段獲取微調項文本, 有人可以幫忙嗎? 片段類 最終Spinner spinner =(Spinner)rootView.findViewById(R.id.choices); spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener(){ @Override 公共無效onItemSelected(AdapterView <?>父級,視圖v, int位置,長arg3){ // TODO自動生成的方法存根 字符串SpinerValue3 = parent.getItemAtPosition(postion).toString(); 如果(SpinerValue3.equals(“ Item 1”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); = }否則,如果(SpinerValue3.equals(“ Item 2”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); }否則,如果(SpinerValue3.equals(“ Item 3”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); }否則,如果(SpinerValue3.equals(“ Item 4”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); }否則,如果(SpinerValue3.equals(“ Item 5”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); }否則,如果(SpinerValue3.equals(“ Item 6”)){ Toast.makeText(getActivity()。getBaseContext(), “嘗試選擇:” + SpinerValue3, Toast.LENGTH_SHORT).show(); } } @Override 公共無效onNothingSelected(AdapterView <?> arg0){ // TODO自動生成的方法存根 } }); 如果上面的即時消息解釋了敬酒,但如何在Activity.class上獲取文本微調項 Activity.class想要通過從Fragment獲取Spinner項目文本來更改SPINNERITEM(在下面的代碼上) 導入android.app.Dialog; 導入android.app.ProgressDialog; 導入android.os.Bundle; 導入android.support.v7.app.AppCompatActivity; 導入android.util.Log; 導入android.view.View; 導入android.widget.AdapterView; 導入android.widget.CheckBox; 導入android.widget.ListView; 導入android.widget.Spinner; 導入android.widget.TextView; 導入com.android.volley.Response; 導入com.android.volley.VolleyError; 導入com.android.volley.VolleyLog; 導入com.android.volley.toolbox.ImageLoader; 導入com.android.volley.toolbox.JsonArrayRequest; 導入com.android.volley.toolbox.NetworkImageView; 導入org.json.JSONArray; 導入org.json.JSONException; 導入org.json.JSONObject; 導入java.util.ArrayList; 導入java.util.List; 公共類RekomendasiExercise擴展了AppCompatActivity的AdapterView.OnItemClickListener { //日誌標籤 私有靜態最終字符串TAG = AbdominalFragment.class.getSimpleName(); 私有靜態最終String url =“ http://........php”; 私有ProgressDialog pDialog; 私有列表<練習> exerciseList = new ArrayList <練習>(); 私有ListView listView; 私有CustomListAdapter適配器; 公共RekomendasiExercise(){ //必需的空公共構造函數 } @Override 公共無效onCreate(捆綁保存的InstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.activity_list); 最後的ListView listView =(ListView)findViewById(R.id.list); 最終Spinner spinner =(Spinner)findViewById(R.id.choices); adapter = new CustomListAdapter(this,exerciseList); listView.setAdapter(adapter); pDialog =新的ProgressDialog(this); //在發出http請求之前顯示進度對話框 pDialog.setMessage(“ Loading ...”); pDialog.show(); if(exerciseList.isEmpty()){ //創建截擊請求obj JsonArrayRequest ExerciseReq =新的JsonArrayRequest(url, 新的Response.Listener(){ @Override 公共無效onResponse(JSONArray response){ Log.d(TAG,response.toString()); hidePDialog(); exerciseList.clear(); //解析json for(int i = 0; i 父級,查看convertView,int位置,長id){ //創建自定義對話框對象 最終Dialog對話框= new Dialog(this); //包含dialog.xml文件 dialog.setContentView(R.layout.dialog); //對話框的佈局 //設置對話框標題 dialog.setTitle(“ Detail”); //設置自定義對話框組件的值-文本,圖像和按鈕 TextView nama =(TextView)dialog.findViewById(R.id.nama); nama.setText(“ Nama =” + exerciseList.get(position).getNama()); //類似的add語句以獲取其他詳細信息 dialog.show(); } }
2020-12-20 08:20:06
我的建議是遵循Activity和Fragment的標准通信模型,其中Activity實現Fragment中定義的回調接口。 檢查此鏈接以獲取詳細信息。 在微調器的onItemSelected方法中,可以使用選定的微調器值調用“活動”的回調方法。 | 這就是您可以通過OOPS方式進行的操作 步驟1)在Activity Class中製作一個微調器Item Value變量 公共類RekomendasiExercise擴展了AppCompatActivity的AdapterView.OnItemClickListener { 私有String currentSpinnerItem; / * 設置當前微調器項目值 * / 公共無效setCurrentSpinnerItem(String itemValue) { this.currentSpinnerItem = itemValue; //用新的價值做活動中的東西 } 步驟2)現在在片段類中更新currentItemSpinner值,如下所示 @Override 公共無效onItemSelected(AdapterView <?>父級,視圖v, int位置,長arg3){ 字符串SpinerValue3 = parent.getItemAtPosition(postion).toString(); //在活動中更新微調框選擇的項目值 (((RekomendasiExercise)getActivity).setCurrentSpinnerItem(SpinerValue3); } | 你的答案 StackExchange.ifUsing(“ editor”,function(){ StackExchange.using(“ externalEditor”,function(){ StackExchange.using(“ snippets”,function(){ StackExchange.snippets.init(); }); }); },“代碼段”); StackExchange.ready(function(){ var channelOptions = { 標籤:“” .split(“”), id:“ 1” }; initTagRenderer(“”。split(“”),“” .split(“”),channelOptions); 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