將數據從一項活動傳遞給另一項活動的Android錯誤活性

我正在創建一個應用程序，計算總分數&百分比並在下一個名爲ResultActvity的活動中顯示結果。我使用相同的ResultActivity顯示第一年的學生成績&第二年的學生成績，當第一年的學生顯示成績時，一切正常，但當第二年的學生顯示成績時，它只顯示總分但沒有顯示％。我是Android開發新手請幫助我解決這個問題。謝謝：）。將數據從一項活動傳遞給另一項活動的Android錯誤活性

FIRSTACTIVITY



    package com.jntuhcalculator.anu.jntuhcalculator; 

     import android.app.Activity; 
     import android.content.Intent; 
     import android.graphics.Typeface; 
     import android.os.Bundle; 
     import android.util.Log; 
     import android.view.View; 
     import android.widget.Button; 
     import android.widget.EditText; 
     import android.widget.TextView; 
     import android.widget.Toast; 

     /** 
     * Created by anu on 18/9/15. 
     */ 
     public class FirstMarks extends Activity { 

      TextView tv_Subjects1, tv_Internal1, tv_External1; 
      EditText et_Int_Eng, et_Int_M1, et_Int_MM, et_Int_Phy, et_Int_Chem, et_Int_Cp, et_Int_ElcsLab, et_Int_EpLab, et_Int_ItLab, et_Int_Draw; 
      EditText et_Ext_Eng, et_Ext_M1, et_Ext_MM, et_Ext_Phy, et_Ext_Chem, et_Ext_Cp, et_Ext_ElcsLab, et_Ext_EpLab, et_Ext_ItLab, et_Ext_Draw; 
      Button btn_Cal1, btn_Ok1; 
      int IEng,IM1,IMM,IEPhy,IEChem,ICp,IEDraw,IELCS_Lab,IEP_LAB,IIT_LAB; 
      int EEng,EM1,EMM,EEPhy,EEChem,ECp,EEDraw,EELCS_Lab,EEP_LAB,EIT_LAB; 
      int ITotal1,ETotal1,Total1; 
      float Percentage1; 
      String f1; 

      @Override 
      protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.marks_1); 


       //INITIALISING VIEWS. 
       //INITIALISING TEXT VIEWS. 
       tv_Subjects1 = (TextView) findViewById(R.id.tv_Subject1); 
       tv_Internal1 = (TextView) findViewById(R.id.tv_Internal1); 
       tv_External1 = (TextView) findViewById(R.id.tv_External1); 
       //INITIALISING EDIT TEXT. 
       //INTERNAL 
       et_Int_Eng = (EditText) findViewById(R.id.et_Int_Eng); 
       et_Int_M1 = (EditText) findViewById(R.id.et_Int_M1); 
       et_Int_MM = (EditText) findViewById(R.id.et_Int_MM); 
       et_Int_Phy = (EditText) findViewById(R.id.et_Int_Phy); 
       et_Int_Chem = (EditText) findViewById(R.id.et_Int_Chem); 
       et_Int_Cp = (EditText) findViewById(R.id.et_Int_Cp); 
       et_Int_ElcsLab = (EditText) findViewById(R.id.et_Int_ElcsLab); 
       et_Int_EpLab = (EditText) findViewById(R.id.et_Int_EpLab); 
       et_Int_ItLab = (EditText) findViewById(R.id.et_Int_ItLab); 
       et_Int_Draw = (EditText) findViewById(R.id.et_Int_Draw); 
       //EXTERNAL 
       et_Ext_Eng = (EditText) findViewById(R.id.et_Ext_Eng); 
       et_Ext_M1 = (EditText) findViewById(R.id.et_Ext_M1); 
       et_Ext_MM = (EditText) findViewById(R.id.et_Ext_MM); 
       et_Ext_Phy = (EditText) findViewById(R.id.et_Ext_Phy); 
       et_Ext_Chem = (EditText) findViewById(R.id.et_Ext_Chem); 
       et_Ext_Cp = (EditText) findViewById(R.id.et_Ext_Cp); 
       et_Ext_ElcsLab = (EditText) findViewById(R.id.et_Ext_ElcsLab); 
       et_Ext_EpLab = (EditText) findViewById(R.id.et_Ext_EpLab); 
       et_Ext_ItLab = (EditText) findViewById(R.id.et_Ext_ItLab); 
       et_Ext_Draw = (EditText) findViewById(R.id.et_Ext_Draw); 
       //INITIALISING BUTTON 
       btn_Cal1 = (Button) findViewById(R.id.btn_Cal1); 
       btn_Ok1 = (Button) findViewById(R.id.btn_Ok1); 




       //WHEN SAVE BUTTON IS CLICKED. 
       btn_Ok1.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 

         //GETTING VALUES FROM EDIT TEXT. 
         //INTERNALS. 
         IEng = getIntValue(et_Int_Eng); 
         IM1 = getIntValue(et_Int_M1); 
         IMM = getIntValue(et_Int_MM); 
         IEPhy = getIntValue(et_Int_Phy); 
         IEChem = getIntValue(et_Int_Chem); 
         ICp = getIntValue(et_Int_Cp); 
         IEDraw = getIntValue(et_Int_Draw); 
         IELCS_Lab = getIntValue(et_Int_ElcsLab); 
         IEP_LAB = getIntValue(et_Int_EpLab); 
         //EXTERNALS. 
         EEng = getIntValue(et_Ext_Eng); 
         EM1 = getIntValue(et_Ext_M1); 
         EMM = getIntValue(et_Ext_MM); 
         EEPhy = getIntValue(et_Ext_Phy); 
         EEChem = getIntValue(et_Ext_Chem); 
         ECp = getIntValue(et_Ext_Cp); 
         EEDraw = getIntValue(et_Ext_Draw); 
         EELCS_Lab = getIntValue(et_Ext_ElcsLab); 
         EEP_LAB = getIntValue(et_Ext_EpLab); 
         EIT_LAB = getIntValue(et_Ext_ItLab); 

        //CALCUATIONS. 
         //INTERNAL TOTAL. 
         ITotal1 = (IEng+IM1+IMM+IEPhy+IEChem+ICp+IEDraw+IELCS_Lab+IEP_LAB+IIT_LAB); 
         //EXTERNAL TOTAL. 
         ETotal1 = (EEng+EM1+EMM+EEPhy+EEChem+ECp+EEDraw+EELCS_Lab+EEP_LAB+EIT_LAB); 
         //TOTAL. 
         Total1 = (ITotal1+ETotal1); 
         //PERCENTAGE. 
         Percentage1 = (float)(Total1/10); 
         f1 = Float.toString(Percentage1); 

         //CREATING TOAST. 
         Toast.makeText(getBaseContext(),"Press Result",Toast.LENGTH_SHORT).show(); 

        } 
       }); 

       btn_Cal1.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent i = new Intent(FirstMarks.this,FirstResult.class); 
         Bundle b = new Bundle(); 
         b.putInt("res1",Total1); 
         b.putString("per1",f1); 
         i.putExtras(b); 
         startActivity(i); 
         finish(); 
        } 
       }); 




      } 



      //SUB-FUNCTION FOR GETTING INTEGER FROM EDITTEXT. 
      private int getIntValue(EditText et) throws NumberFormatException { 
       int i =0; 
       String s; 
       try { 
        s = et.getText().toString(); 
        if(s.equals("")){ 
         Toast.makeText(getApplicationContext(),"Invalid Marks",Toast.LENGTH_SHORT).show(); 
        } 
        i = Integer.parseInt(s); 
        return i; 

       } catch (NumberFormatException e) { 
        Log.e("ERROR:", "NOT A NUMBER"); 
       } 
        return 0; 

      } 


      }

**SECONDACTIVITY**



    package com.jntuhcalculator.anu.jntuhcalculator; 

     import android.app.Activity; 
     import android.content.Intent; 
     import android.graphics.Typeface; 
     import android.os.Bundle; 
     import android.util.Log; 
     import android.view.View; 
     import android.widget.Button; 
     import android.widget.EditText; 
     import android.widget.TextView; 
     import android.widget.Toast; 

     /** 
     * Created by anu on 19/9/15. 
     */ 
     public class SecondMarks_1 extends Activity { 

      TextView tv_PS,tv_MFCS,tv_DS,tv_DLD,tv_EDC,tv_BEE,tv_EELab,tv_DSLab; 
      TextView tv_Subjects21, tv_Internal21, tv_External21; 
      EditText et_Int_PS, et_Int_MFCS, et_Int_DS, et_Int_DLD, et_Int_EDC, et_Int_BEE, et_Int_EELab, et_Int_DSLab; 
      EditText et_Ext_PS, et_Ext_MFCS, et_Ext_DS, et_Ext_DLD, et_Ext_EDC, et_Ext_BEE, et_Ext_EELab, et_Ext_DSLab; 
      Button btn_Cal21, btn_Ok21; 
      int IPS,IMFCS,IDS,IDLD,IEDC,IBEE,IEE_Lab,IDS_Lab; 
      int EPS,EMFCS,EDS,EDLD,EEDC,EBEE,EEE_Lab,EDS_Lab; 
      int ITotal21,ETotal21,Total21; 
      float Percentage21; 
      String f21; 

      @Override 
      protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
       setContentView(R.layout.secondmarks_1); 


       //INITIALISING VIEWS. 
       //INITIALISING TEXT VIEWS. 
       tv_Subjects21 = (TextView) findViewById(R.id.tv_Subject21); 
       tv_Internal21 = (TextView) findViewById(R.id.tv_Internal21); 
       tv_External21 = (TextView) findViewById(R.id.tv_External21); 
       //SUBJECT TEXT VIEWS. 
       tv_PS = (TextView) findViewById((R.id.tv_PS)); 
       tv_MFCS = (TextView) findViewById((R.id.tv_MFCS)); 
       tv_DS = (TextView) findViewById((R.id.tv_DS)); 
       tv_DLD = (TextView) findViewById((R.id.tv_DLD)); 
       tv_EDC = (TextView) findViewById((R.id.tv_EDC)); 
       tv_BEE = (TextView) findViewById((R.id.tv_BEE)); 
       tv_EELab = (TextView) findViewById((R.id.tv_EE_Lab)); 
       tv_DSLab = (TextView) findViewById((R.id.tv_DS_Lab)); 
       //INITIALISING EDIT TEXT. 
       //INTERNAL 
       et_Int_PS = (EditText) findViewById(R.id.et_Int_PS); 
       et_Int_MFCS = (EditText) findViewById(R.id.et_Int_MFCS); 
       et_Int_DS = (EditText) findViewById(R.id.et_Int_DS); 
       et_Int_DLD = (EditText) findViewById(R.id.et_Int_DLD); 
       et_Int_EDC = (EditText) findViewById(R.id.et_Int_EDC); 
       et_Int_BEE = (EditText) findViewById(R.id.et_Int_BEE); 
       et_Int_EELab = (EditText) findViewById(R.id.et_Int_EELab); 
       et_Int_DSLab = (EditText) findViewById(R.id.et_Int_DSLab); 
       //EXTERNAL 
       et_Ext_PS = (EditText) findViewById(R.id.et_Ext_PS); 
       et_Ext_MFCS = (EditText) findViewById(R.id.et_Ext_MFCS); 
       et_Ext_DS = (EditText) findViewById(R.id.et_Ext_DS); 
       et_Ext_DLD = (EditText) findViewById(R.id.et_Ext_DLD); 
       et_Ext_EDC = (EditText) findViewById(R.id.et_Ext_EDC); 
       et_Ext_BEE = (EditText) findViewById(R.id.et_Ext_BEE); 
       et_Ext_EELab = (EditText) findViewById(R.id.et_Ext_EELab); 
       et_Ext_DSLab = (EditText) findViewById(R.id.et_Ext_DSLab); 
       //INITIALISING BUTTON 
       btn_Cal21 = (Button) findViewById(R.id.btn_Cal21); 
       btn_Ok21 = (Button) findViewById(R.id.btn_Ok21); 
     //DISPLAYING SUBJECT NAMES WHEN TEXT VIEW IS CLICKED. 
       tv_PS.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         disp(tv_PS, "PS:Probabilty & Statistics"); 
        } 
       }); 
       tv_MFCS.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         disp(tv_MFCS, "MFCS:Mathematical Foundation Of Computer Science"); 

        } 
       }); 
       tv_DS.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) {disp(tv_DS, "DS:Data Structures"); 
        } 
       }); 
       tv_DLD.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         disp(tv_DLD, "DLD:Digital Logic Design"); 
        } 
       }); 
       tv_EDC.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         disp(tv_EDC, "EDC:Electronic Devices & Circuits"); 
        } 
       }); 
       tv_BEE.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { disp(tv_BEE, "BEE:Basic Electrical Engineering"); 
        } 
       }); 
       tv_EELab.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { disp(tv_EELab, "Electrical & Electronics Lab"); 
        } 
       }); 
       tv_DSLab.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) {disp(tv_DSLab, "Data Structures Lab"); 
        } 
       }); 


       //WHEN SAVE BUTTON IS CLICKED. 
       btn_Ok21.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 

         //GETTING VALUES FROM EDIT TEXT. 
         //INTERNALS. 
         IPS = getIntValue(et_Int_PS); 
         IMFCS = getIntValue(et_Int_MFCS); 
         IDS = getIntValue(et_Int_DS); 
         IDLD = getIntValue(et_Int_DLD); 
         IEDC = getIntValue(et_Int_EDC); 
         IBEE = getIntValue(et_Int_BEE); 
         IEE_Lab = getIntValue(et_Int_EELab); 
         IDS_Lab = getIntValue(et_Int_DSLab); 
         //EXTERNALS. 
         EPS = getIntValue(et_Ext_PS); 
         EMFCS = getIntValue(et_Ext_MFCS); 
         EDS = getIntValue(et_Ext_DS); 
         EDLD = getIntValue(et_Ext_DLD); 
         EEDC = getIntValue(et_Ext_EDC); 
         EBEE = getIntValue(et_Ext_BEE); 
         EEE_Lab = getIntValue(et_Ext_EELab); 
         EDS_Lab = getIntValue(et_Ext_DSLab); 

         //CALCULATIONS. 
         //INTERNAL TOTAL. 
         ITotal21 = (IPS+IMFCS+IDS+IDLD+IEDC+IBEE+IEE_Lab+IDS_Lab); 
         //EXTERNAL TOTAL. 
         ETotal21 = (EPS+EMFCS+EDS+EDLD+EEDC+EBEE+EEE_Lab+EDS_Lab); 
         //TOTAL. 
         Total21 = (ITotal21+ETotal21); 
         //PERCENTAGE. 
         Percentage21 = ((Total21/750)*100); 
         f21 = Float.toString(Percentage21); 

         //CREATING TOAST. 
         Toast.makeText(getBaseContext(),"Press Result",Toast.LENGTH_SHORT).show(); 
        } 
       }); 

        btn_Cal21.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent i = new Intent(SecondMarks_1.this,FirstResult.class); 
         Bundle b = new Bundle(); 
         b.putInt("res1",Total21); 
         b.putString("per1",f21); 
         i.putExtras(b); 
         startActivity(i); 
         finish(); 
        } 
       }); 




      } 



      //SUB-FUNCTION FOR GETTING INTEGER FROM EDITTEXT. 
      private int getIntValue(EditText et) throws NumberFormatException { 
       int i =0; 
       String s; 
       try { 
        s = et.getText().toString(); 
        if(s.equals("")){ 
         Toast.makeText(getApplicationContext(),"Invalid Marks",Toast.LENGTH_SHORT).show(); 
        } 
        i = Integer.parseInt(s); 
        return i; 

       } catch (NumberFormatException e) { 
        Log.e("ERROR:", "NOT A NUMBER"); 
       } 
       return 0; 

      } 

      private void disp(TextView tv,String s){ 
       Toast.makeText(getApplicationContext(), s, Toast.LENGTH_SHORT).show(); 
      } 

     }

**RESULTACTIVITY** 
<pre><code> 

    package com.jntuhcalculator.anu.jntuhcalculator; 

    import android.app.Activity; 
    import android.content.Intent; 
    import android.os.Bundle; 
    import android.view.View; 
    import android.widget.Button; 
    import android.widget.EditText; 

    /** 
    * Created by anu on 18/9/15. 
    */ 
    public class FirstResult extends Activity { 

     EditText et_Total1,et_Percentage1; 
     Button btn_Exit1; 
     int sres1; 
     String sper1; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.result_first); 

      //INITIALISING VIEWS. 
      et_Total1 = (EditText) findViewById(R.id.et_Total1); 
      et_Percentage1 = (EditText) findViewById(R.id.et_Percentage1); 
      btn_Exit1 = (Button) findViewById(R.id.btn_Exit1); 

      //GETTING DATA FROM PREVIOUS ACTIVITY. 
      Bundle b = getIntent().getExtras(); 
      sres1 = b.getInt("res1", 0); 
      sper1 = b.getString("per1"); 

      //Converting Float Into String. 
      //f = Float.toString(sper1); 

      //SETTING RESULTS. 
      et_Total1.setText(sres1+""); 
      et_Percentage1.setText(sper1+"%"); 

      //WHEN EXIT IS CLICKED. 
      btn_Exit1.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Intent i = new Intent(getBaseContext(), YearDetails.class); 
        i.putExtra("Total",sres1); 
        startActivity(i); 
        finish(); 
        System.exit(0); 
       } 
      }); 


     } 
    }

來源

2015-09-25 Anu

你是正確不能不同活動之間發送的價值觀，我會給你一個例子，試試吧。

的語法是這樣的

用於發送數據

String data = getIntent().getExtras().getString("keyName"); 
Intent intent = new Intent(ActivityOne.this, ActivityTwo.class); 
intent.putExtra("keyName","value");

對於在ActivityTwo

String value= getIntent().getStringExtra("keyName"); 
Intent intent = getIntent(); 
Bundle extras = intent.getExtras();

接收額外提示： -

因此，你需要在FirstActivity

編輯

btn_Cal21.setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         Intent i = new Intent(SecondMarks_1.this,FirstResult.class); 
         Bundle b = new Bundle(); 
         b.putInt("res1",Total21); 
         b.putString("per1",f21); 
         i.putExtras(b); 
         startActivity(i); 
         finish(); 
        } 
       });

同樣適用於以下活動。

還沒有得到？其實在你FirstActivity你已經把

Intent i = new Intent(FirstMarks.this,FirstResult.class); 
         Bundle b = new Bundle(); 
         b.putInt("res1",Total1); 
         b.putString("per1",f1);

而在你的第二個活動。

Intent i = new Intent(SecondMarks_1.this,FirstResult.class); 
        Bundle b = new Bundle(); 
        b.putInt("res1",Total21); 
        b.putString("per1",f21); 
        i.putExtras(b); 
        startActivity(i);

你看你用PER1串在這兩個地方，改變這種狀況，這很可能會導致應用無法得到的值（可能給一些其他的字符串）。

在這部分中，您需要添加第二個活動結果的代碼以便接收。

   Bundle b = getIntent().getExtras(); 
      sres1 = b.getInt("res1", 0); 
      sper1 = b.getString("per1");

希望有幫助。

來源

2015-09-25 16:32:59 penta

啊是的但事情是我只有一個活動顯示結果..！ – Anu

是的，它的確定，只是recevie它在接收活動，親切地upvote答案，如果它已經幫助你 – penta

感謝Alot好友.. :) – Anu

將數據從一項活動傳遞給另一項活動的Android錯誤活性

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