i work on android apps . I now have an app that have 2 button for "user info" and "charging", when click on each button must be show itself dialog associated. content of dialogs are 2 layout designed before and set for contentView. my issue is at showing only dialog_user_info by clicking on every button. while actually must be show layout_sharzh when click btnCharge, and show layout_user_info when click btnUserInfo.How can i resolve it?
here is my codes:
 (Also I wrote   final int dialog_charge=1 , dialog_user_info=2; and   private Dialog dialog=null;, on top of activity after 
public class MainActivity extends Activity  )
btnCharge.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog(dialog_charge,null);
            }
        });
        btnUserInfo.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    showDialog(dialog_user_info,null);
                }
            });
And this is onCreateDialog method:
protected Dialog onCreateDialog(int id ) 
        {     
        switch(id)
        {           
        case dialog_charge :     
       dialog=new Dialog(this);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        LayoutInflater inflater = LayoutInflater.from(this);
        View dialogview = inflater.inflate(R.layout.layout_sharzh, null);
        // now pass dialogview to setView of Dialog
        dialog.setContentView(dialogview);
        btnSave=(Button)dialogview.findViewById(R.id.btnSave);
        btnReturn=(Button)dialogview.findViewById(R.id.btnReturn);
        btnReturn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                dialog.cancel();
            }
        });
      btnSave.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Toast.makeText(MainActivity.this,"success",Toast.LENGTH_SHORT).show();
            }
        });
        case dialog_user_info:
            dialog=new Dialog(this);
            dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
            LayoutInflater inflater1 = LayoutInflater.from(this);
            dialogview = inflater1.inflate(R.layout.layout_user_info, null);
            // now pass dialogview to setView of Dialog
            dialog.setContentView(dialogview);
            dialog.setCanceledOnTouchOutside(true); 
        }
        return dialog;
   }
