Java.lang.IllegalStateException：已经附加

概述我正在尝试构建一个应用程序,粘贴前一个活动的输入(没有问题),然后从数据库中显示一些内容(按下ButtonGet时).问题是,当我尝试运行项目时,我得到了Java.lang.IllegalStateException：已经附加.我的代码出了什么问题？packagebr.exemplozxingintegration;importandroid.annotat

我正在尝试构建一个应用程序,粘贴前一个活动的输入(没有问题),然后从数据库中显示一些内容(按下buttonGet时).问题是,当我尝试运行项目时,我得到了
Java.lang.IllegalStateException：已经附加.我的代码出了什么问题？

 package br.exemplozxingintegration; import androID.annotation.Suppresslint; import androID.app.ProgressDialog; import androID.content.ClipData; import androID.content.ClipboardManager; import androID.os.Bundle; import androID.support.v7.app.AppCompatActivity; import androID.vIEw.VIEw; import androID.Widget.button; import androID.Widget.EditText; import androID.Widget.TextVIEw; import androID.Widget.Toast; import com.androID.volley.RequestQueue; import com.androID.volley.Response; import com.androID.volley.VolleyError; import com.androID.volley.toolBox.StringRequest; import com.androID.volley.toolBox.Volley; import org.Json.JsONArray; import org.Json.JsONException; import org.Json.JsONObject; public class SecondActivity extends AppCompatActivity implements VIEw.OnClickListener  {     private EditText  pastetext;     private ClipboardManager myClipboard;     private ClipData myClip;     private button btn;     private EditText textVIEw1;     private button buttonGet;     private TextVIEw textVIEwResult;     private ProgressDialog loading;           @OverrIDe           protected voID onCreate(Bundle savedInstanceState) {               super.onCreate(savedInstanceState);               setContentVIEw(R.layout.activity_second);               myClipboard = (ClipboardManager) getSystemService(CliPBOARD_SERVICE);               pastetext = (EditText) findVIEwByID(R.ID.textVIEw1);               btn = (button)findVIEwByID(R.ID.buttonPaste);               btn.performClick();               super.onCreate(savedInstanceState);               setContentVIEw(R.layout.activity_main);               textVIEw1 = (EditText) findVIEwByID(R.ID.textVIEw1);               buttonGet = (button) findVIEwByID(R.ID.buttonGet);               textVIEwResult = (TextVIEw) findVIEwByID(R.ID.textVIEwResult);               buttonGet.setonClickListener(this);           }           @Suppresslint("NewAPI")           public voID paste(VIEw vIEw) {               ClipData cp = myClipboard.getPrimaryClip();               ClipData.Item item = cp.getItemAt(0);               String text = item.getText().toString();               pastetext.setText(text);               Toast.makeText(getApplicationContext(), "Text Pasted",                       Toast.LENGTH_SHORT).show();           }     private voID getData() {         String ID = textVIEw1.getText().toString().trim();         if (ID.equals("")) {             Toast.makeText(this, "", Toast.LENGTH_LONG).show();             return;         }         loading = ProgressDialog.show(this,"Please wait...","Fetching...",false,false);         String url = Config.DATA_URL+textVIEw1.getText().toString().trim();         StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {             @OverrIDe             public voID onResponse(String response) {                 loading.dismiss();                 showJsON(response);             }         },                 new Response.ErrorListener() {                     @OverrIDe                     public voID one rrorResponse(VolleyError error) {                         Toast.makeText(SecondActivity.this,error.getMessage().toString(),Toast.LENGTH_LONG).show();                     }                 });         RequestQueue requestQueue = Volley.newRequestQueue(this);         requestQueue.add(stringRequest);     }     private voID showJsON(String response){         String name="";         String image = "";         try {             JsONObject JsonObject = new JsONObject(response);             JsONArray result = JsonObject.getJsONArray(Config.JsON_ARRAY);             JsONObject collegeData = result.getJsONObject(0);             name = collegeData.getString(Config.KEY_name);             image = collegeData.getString(Config.KEY_IMAGE);         } catch (JsONException e) {             e.printstacktrace();         }         textVIEwResult.setText("name:\t"+name+"\nImagine :\t"+ image);     }     @OverrIDe     public voID onClick(VIEw v) {         getData();     } }

解决方法:

在你的onCreate中,你两次调用super.onCreate(),并且两次调用setContentVIEw().我很确定这不是你想要做的.

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