把Id名稱放在字符串中

得到它的工作，但它比我想成爲更長。 新的Java：把Id名稱放在字符串中

package com.example.musicbynumbers; 



import android.os.Bundle; 
import android.app.Activity; 
import android.app.ListActivity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.ListView; 

public class majorScales extends Activity implements View.OnClickListener { 
    Button aflatmaj, amaj, bflatmaj, bmaj, cmaj, dflatmaj, dmaj, eflatmaj, emaj, fmaj, fsharpmaj, gmaj; 
    ImageButton mainMenu; 
    Intent j; 
    String scaleName; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.majorscales); 
     j = new Intent(this, display.class); 
     mainMenu = (ImageButton) findViewById(R.id.imagelogo); 
     aflatmaj = (Button) findViewById(R.id.aflatmajb); 
     amaj = (Button) findViewById(R.id.amajb); 
     bflatmaj = (Button) findViewById(R.id.bflatmajb); 
     bmaj = (Button) findViewById(R.id.bmajb); 
     cmaj = (Button) findViewById(R.id.cmajb); 
     dflatmaj = (Button) findViewById(R.id.dflatmajb); 
     dmaj = (Button) findViewById(R.id.dmajb); 
     eflatmaj = (Button) findViewById(R.id.eflatmajb); 
     emaj = (Button) findViewById(R.id.emajb); 
     fmaj = (Button) findViewById(R.id.fmajb); 
     fsharpmaj = (Button) findViewById(R.id.fsharpmajb); 
     gmaj = (Button) findViewById(R.id.gmajb); 
     mainMenu.setOnClickListener(this); 
     aflatmaj.setOnClickListener(this); 
     amaj.setOnClickListener(this); 
     bflatmaj.setOnClickListener(this); 
     bmaj.setOnClickListener(this); 
     cmaj.setOnClickListener(this); 
     dflatmaj.setOnClickListener(this); 
     dmaj.setOnClickListener(this); 
     eflatmaj.setOnClickListener(this); 
     emaj.setOnClickListener(this); 
     fmaj.setOnClickListener(this); 
     fsharpmaj.setOnClickListener(this); 
     gmaj.setOnClickListener(this); 



    } 






     @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       switch(arg0.getId()){ 
       case R.id.imagelogo: 
        Intent i = new Intent(majorScales.this, MainMenu.class); 
        startActivity(i); 
        break; 
       case R.id.aflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 

        startActivity(j); 
        break; 
       case R.id.amajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.bflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.bmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.cmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.dflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.dmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.eflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.emajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.fmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.fsharpmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.gmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 




    } 

} 
} 



package com.example.musicbynumbers; 

import android.app.Activity; 
import android.content.res.Resources; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.widget.ImageButton; 
import android.widget.ImageView; 

public class display extends Activity { 
    ImageView displayScale; 
    ImageButton logoButton; 
    String gotScale; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.display); 
     Initalize(); 
     gotScale = getIntent().getStringExtra("key"); 
     ImageView displayScale = (ImageView) findViewById(R.id.displayImage); 
     int id = getResources().getIdentifier("com.example.musicbynumbers:drawable/" + gotScale, null, null); 
     displayScale.setImageResource(id); 
    } 

    private void Initalize() { 
     // TODO Auto-generated method stub 
     displayScale = (ImageView) findViewById(R.id.displayImage); 
     logoButton = (ImageButton) findViewById(R.id.imagelogo); 
     gotScale = "ic_launcher.png"; 

    } 

}

我試圖讓ID名稱，並把它放在一個字符串，然後它去到另一個活動，並打開一個資源畫面與相應的文件名

例如。

r.id.x GET X並把它放在y字符串然後將其發送到不同的活動如何獲得X並把它在字符串中？

我知道有一個簡單的答案，因爲我對編程很陌生。

package com.example.musicbynumbers; 

import android.os.Bundle; 
import android.app.Activity; 
import android.app.ListActivity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.ListView; 

public class majorScales extends Activity implements View.OnClickListener { 
    Button aflatmaj, amaj, bflatmaj, bmaj, cmaj, dflatmaj, dmaj, eflatmaj, emaj, fmaj, fsharpmaj, gmaj; 
    ImageButton mainMenu; 
    Intent j; 
    String scaleName; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.majorscales); 
     j = new Intent(this, display.class); 
     mainMenu = (ImageButton) findViewById(R.id.imagelogo); 
     aflatmaj = (Button) findViewById(R.id.aflatmajb); 
     amaj = (Button) findViewById(R.id.amajb); 
     bflatmaj = (Button) findViewById(R.id.bflatmajb); 
     bmaj = (Button) findViewById(R.id.bmajb); 
     cmaj = (Button) findViewById(R.id.cmajb); 
     dflatmaj = (Button) findViewById(R.id.dflatmajb); 
     dmaj = (Button) findViewById(R.id.dmajb); 
     eflatmaj = (Button) findViewById(R.id.eflatmajb); 
     emaj = (Button) findViewById(R.id.emajb); 
     fmaj = (Button) findViewById(R.id.fmajb); 
     fsharpmaj = (Button) findViewById(R.id.fsharpmajb); 
     gmaj = (Button) findViewById(R.id.gmajb); 
     mainMenu.setOnClickListener(this); 
     aflatmaj.setOnClickListener(this); 
     amaj.setOnClickListener(this); 
     bflatmaj.setOnClickListener(this); 
     bmaj.setOnClickListener(this); 
     cmaj.setOnClickListener(this); 
     dflatmaj.setOnClickListener(this); 
     dmaj.setOnClickListener(this); 
     eflatmaj.setOnClickListener(this); 
     emaj.setOnClickListener(this); 
     fmaj.setOnClickListener(this); 
     fsharpmaj.setOnClickListener(this); 
     gmaj.setOnClickListener(this); 



    } 




     @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       switch(arg0.getId()){ 
       case R.id.imagelogo: 
        Intent i = new Intent(majorScales.this, MainMenu.class); 
        startActivity(i); 
        break; 
       case R.id.aflatmajb: 
        scaleName = 

        startActivity(j); 
        break; 
       case R.id.amajb: 

        startActivity(j); 
        break; 
       case R.id.bflatmajb: 

        startActivity(j); 
        break; 
       case R.id.bmajb: 

        startActivity(j); 
        break; 
       case R.id.cmajb: 

        startActivity(j); 
        break; 
       case R.id.dflatmajb: 

        startActivity(j); 
        break; 
       case R.id.dmajb: 
        ; 
        startActivity(j); 
        break; 
       case R.id.eflatmajb: 
        ; 
        startActivity(j); 
        break; 
       case R.id.emajb: 
        ; 
        startActivity(j); 
        break; 
       case R.id.fmajb: 
        ; 
        startActivity(j); 
        break; 
       case R.id.fsharpmajb: 
        ; 
        startActivity(j); 
        break; 
       case R.id.gmajb: 
        ; 
        startActivity(j); 
        break; 



    } 

} 
}

例如在開關殼體爲「R.id.aflatmajb」我希望r.id.後的部分（aflatmajb）放在一個字符串中有沒有辦法做到這一點，或者我將不得不手動爲每個菜單中的每個按鈕？

來源

2012-12-16 P Molloy

你的意思是你在過渡期間在活動之間傳遞數據嗎？你會做

// This is a String, you can use a lot of data types 
String theData = "This is some data I need to send along"; 

// Create a new Intent that will start NextActivity 
Intent i = new Intent(this, NextActivity.class); 

// Add the data to the Intent using any key you want (which is how you reference the data) 
i.putExtra("key", theData); 

// Start the activity 
startActivity(i);

然後你會得到的第二個活動從Intent數據：

// getIntent() returns the Intent that was used to start the current Activity 
String theData = getIntent().getStringExtra("key");

來源

2012-12-16 00:52:38

我能做到這一點我需要的是如何從每個按鈕的ID的獲取文本，並把它們放到一個字符串，因爲有不同的菜單一百多按鈕我必須做 –

'（（Button）findViewById（R.id.btn_id））。getId（）;'？編輯：當一個按鈕被按下時，提供者添加了一個監聽器，'onClick（View v）'在監聽器上被觸發。你可以通過'v.getViewId（）'獲取被按下的按鈕的ID。編輯2：對不起，'getId（）'。 'getViewId（）'用於'ListView's。 –

謝謝我會嘗試 –

得到它的工作，但它的時間比我想要的。 新的Java：

package com.example.musicbynumbers; 



import android.os.Bundle; 
import android.app.Activity; 
import android.app.ListActivity; 
import android.content.Intent; 
import android.view.Menu; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ImageButton; 
import android.widget.ListView; 

public class majorScales extends Activity implements View.OnClickListener { 
    Button aflatmaj, amaj, bflatmaj, bmaj, cmaj, dflatmaj, dmaj, eflatmaj, emaj, fmaj, fsharpmaj, gmaj; 
    ImageButton mainMenu; 
    Intent j; 
    String scaleName; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.majorscales); 
     j = new Intent(this, display.class); 
     mainMenu = (ImageButton) findViewById(R.id.imagelogo); 
     aflatmaj = (Button) findViewById(R.id.aflatmajb); 
     amaj = (Button) findViewById(R.id.amajb); 
     bflatmaj = (Button) findViewById(R.id.bflatmajb); 
     bmaj = (Button) findViewById(R.id.bmajb); 
     cmaj = (Button) findViewById(R.id.cmajb); 
     dflatmaj = (Button) findViewById(R.id.dflatmajb); 
     dmaj = (Button) findViewById(R.id.dmajb); 
     eflatmaj = (Button) findViewById(R.id.eflatmajb); 
     emaj = (Button) findViewById(R.id.emajb); 
     fmaj = (Button) findViewById(R.id.fmajb); 
     fsharpmaj = (Button) findViewById(R.id.fsharpmajb); 
     gmaj = (Button) findViewById(R.id.gmajb); 
     mainMenu.setOnClickListener(this); 
     aflatmaj.setOnClickListener(this); 
     amaj.setOnClickListener(this); 
     bflatmaj.setOnClickListener(this); 
     bmaj.setOnClickListener(this); 
     cmaj.setOnClickListener(this); 
     dflatmaj.setOnClickListener(this); 
     dmaj.setOnClickListener(this); 
     eflatmaj.setOnClickListener(this); 
     emaj.setOnClickListener(this); 
     fmaj.setOnClickListener(this); 
     fsharpmaj.setOnClickListener(this); 
     gmaj.setOnClickListener(this); 



    } 






     @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       switch(arg0.getId()){ 
       case R.id.imagelogo: 
        Intent i = new Intent(majorScales.this, MainMenu.class); 
        startActivity(i); 
        break; 
       case R.id.aflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 

        startActivity(j); 
        break; 
       case R.id.amajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.bflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.bmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.cmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.dflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.dmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.eflatmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.emajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.fmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.fsharpmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 
       case R.id.gmajb: 
        scaleName = "aflatmaj"; 
        j.putExtra("key", scaleName); 
        startActivity(j); 
        break; 




    } 

} 
} 



package com.example.musicbynumbers; 

import android.app.Activity; 
import android.content.res.Resources; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.widget.ImageButton; 
import android.widget.ImageView; 

public class display extends Activity { 
    ImageView displayScale; 
    ImageButton logoButton; 
    String gotScale; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.display); 
     Initalize(); 
     gotScale = getIntent().getStringExtra("key"); 
     ImageView displayScale = (ImageView) findViewById(R.id.displayImage); 
     int id = getResources().getIdentifier("com.example.musicbynumbers:drawable/" + gotScale, null, null); 
     displayScale.setImageResource(id); 
    } 

    private void Initalize() { 
     // TODO Auto-generated method stub 
     displayScale = (ImageView) findViewById(R.id.displayImage); 
     logoButton = (ImageButton) findViewById(R.id.imagelogo); 
     gotScale = "ic_launcher.png"; 

    } 

}

來源

2012-12-16 17:34:14

把Id名稱放在字符串中

回答

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