title: Android - How to disable parent activity when dialog enable
body: <p>When the user click on textEditor , dialog calculator will display, that time parent activity/screen  should be disable. </p>
  
  <p>This is my code :</p>
  
  <pre><code>txtQty.setOnFocusChangeListener(new OnFocusChangeListener() {
     public void onFocusChange(View v, boolean hasFocus) {
          if(hasFocus){
                          keyAmount = new StringBuffer();
                          if(keyAmount.length() &gt; 0){
                              keyAmount.delete(0, keyAmount.length());
                          }
  
                          int[] origin = new int[2];
                          v.getLocationOnScreen(origin);
                          final int xVal = origin[0];
                          final int yVal = origin[1] ;
  
                          dialog = new Dialog(SalesActivityGroup.group.getParent());
                          dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
  
                          View vLoad = LayoutInflater.from(SalesActivityGroup.group.getParent()).inflate(R.layout.key_pad, null);
                          dialog.setContentView(vLoad);
                          android.view.WindowManager.LayoutParams lp= dialog.getWindow().getAttributes();  
  
                          dialog.setCancelable(true);
                          dialog.setCanceledOnTouchOutside(true);  
                          lp.x = xVal;
                          lp.y = yVal;
                          lp.width = LayoutParams.WRAP_CONTENT;
                          lp.height = LayoutParams.WRAP_CONTENT;
                          lp.gravity = Gravity.TOP | Gravity.LEFT;
                          lp.dimAmount = 0;            
                          dialog.getWindow().setAttributes(lp);
                          dialog.setCancelable(true);
                          keyamDisplay  = (TextView)dialog.findViewById(R.id.keyamDisplay);
  
                          Button  txtone = (Button)dialog.findViewById(R.id.txtone);
                          txtone.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("1");
                                keyamDisplay.setText("" + keyAmount.toString());
  
                             }
                          });
  
                          Button  txttwo = (Button)dialog.findViewById(R.id.txttwo);
                          txttwo.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("2");
                                keyamDisplay.setText("" + keyAmount.toString());
  
                             }
                          });
  
                          Button  txtthree = (Button)dialog.findViewById(R.id.txtthree);
                          txtthree.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("3");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtfour = (Button)dialog.findViewById(R.id.txtfour);
                          txtfour.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("4");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtfive = (Button)dialog.findViewById(R.id.txtfive);
                          txtfive.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("5");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtsix = (Button)dialog.findViewById(R.id.txtsix);
                          txtsix.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("6");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                           });
  
                          Button  txtseven = (Button)dialog.findViewById(R.id.txtseven);
                          txtseven.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("7");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txteight = (Button)dialog.findViewById(R.id.txteight);
                          txteight.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("8");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtnine = (Button)dialog.findViewById(R.id.txtnine);
                          txtnine.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("9");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtZero = (Button)dialog.findViewById(R.id.txtZero);
                          txtZero.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                keyAmount.append("0");
                                keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          Button  txtdot = (Button)dialog.findViewById(R.id.txtdot);
                          txtdot.setOnClickListener(new OnClickListener() {
                                 public void onClick(View v) {
                                    keyAmount.append(".");
                                    keyamDisplay.setText("" + keyAmount.toString());
                                 }
                          });
  
                          Button  diaDelete = (Button)dialog.findViewById(R.id.diaDelete);
                          diaDelete.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                               if(keyAmount.length() &gt; 0){
                                  keyAmount.delete(keyAmount.length()-1, keyAmount.length());
                              }
                                  keyamDisplay.setText("" + keyAmount.toString());
                             }
                          });
  
                          ImageButton imageSmileExit = (ImageButton)dialog.findViewById(R.id.imageSmileExit);
                          imageSmileExit.setOnClickListener(new OnClickListener() {
                              public void onClick(View v) {
                                  dialog.dismiss();
                              }
                          });
  
                          Button  txtDialogOK = (Button)dialog.findViewById(R.id.txtDialogOK);
                          txtDialogOK.setOnClickListener(new OnClickListener() {
                             public void onClick(View v) {
                                 dialog.dismiss();
  </code></pre>
  
  <p>This is my screen shot :</p>
  
  <p><img src="https://i.stack.imgur.com/BdUpj.png" alt="enter image description here"></p>