利用dialog.getButton().setEnabled()实现按钮使能

来源：互联网发布：java聊斋聂小倩编辑：程序博客网时间：2024/06/06 05:45
<span style="font-family: Arial, Helvetica, sans-serif;">                       AlertDialog.Builder builder = new AlertDialog.Builder(CheckTableActivity.this);</span>                        LayoutInflater inflater = getLayoutInflater();          View view = inflater.inflate(R.layout.input_dialog, null);          dg_danger = (EditText) view.findViewById(R.id.editText1);          dg_score = (EditText) view.findViewById(R.id.editText2);          dg_spinner = (Spinner) view.findViewById(R.id.spinner1);                final int num = vp_curr>0?(vp_curr-1):0;        danger_flag = 0;        score_flag = 0;                // Inflate and set the layout for the dialog          // Pass null as the parent view because its going in the dialog layout          builder.setView(view)                  // Add action buttons                  .setPositiveButton("确认",                          new DialogInterface.OnClickListener()                          {                              @Override                              public void onClick(DialogInterface dialog, int id)                              {                              addListItem(num, dg_danger.getText().toString(), dg_score.getText().toString());                            System.out.println(dg_danger.getText().toString() + ";" + dg_score.getText().toString());                            }                          }).setNegativeButton("取消", null).setTitle("添加隐患条目");          AlertDialog ad = builder.create();        ad.setView(view);        ad.show();//show之后再获取按钮        final Button positiveButton = ad.getButton(AlertDialog.BUTTON_POSITIVE);                positiveButton.setEnabled(false);        System.out.println("setEnabled false");        //edittext文本改变监听，下同        dg_danger.addTextChangedListener(new TextWatcher()        {                    @Override                    public void afterTextChanged(Editable arg0) {                    System.out.println("danger changed");                        if(arg0.toString().trim().equals("")){                        danger_flag = 0;                            positiveButton.setEnabled(false);                            System.out.println("set enabled false");                        } else {                        danger_flag = 1;                        if(score_flag == 1)                        {                        positiveButton.setEnabled(true);                        System.out.println("set enabled true");                        }                        }                    }                    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }                    public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {}});        dg_score.addTextChangedListener(new TextWatcher()        {                    @Override                    public void afterTextChanged(Editable arg0) {                    System.out.println("score changed");                        if(arg0.toString().equals("")){                        score_flag = 0;                            positiveButton.setEnabled(false);                            System.out.println("set enabled false");                        } else {                        score_flag = 1;                        if(danger_flag == 1)                        {                        positiveButton.setEnabled(true);                        System.out.println("set enabled true");                        }                        }                    }                    public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { }                    public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {} });
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