在Android

Question

我想要禁用按钮，而不是在textview为空时单击，并在文本不为空时启用并获取单击事件。

以下是使用的代码

    txtVesselName = (TextView) findViewById(R.id.text_VesselName);
    btnPost = (Button)findViewById(R.id.button_addPost_Send);

    txtVesselName.setVisibility(View.GONE);
    etxtVesselCode = (EditText) findViewById(R.id.text_VesselCode);
    etxtVesselCode.addTextChangedListener(vesselWatcher);

 if(txtVesselName.getText().toString().isEmpty())
        {
           // btnPost.setClickable(true);
            btnPost.setEnabled(false);
            btnPost.setClickable(false);
            btnPost.setBackgroundColor(Color.GRAY);

        }
        if(txtVesselName.getText().toString().trim() != null)
        {
            btnPost.setClickable(true);
            btnPost.setEnabled(true);
        }

btnPost.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.e("Click to this", "");
        }
    });

当我使用btnPost.setEnabled(false);按钮时未禁用＆amp;可以在这种情况下点击。如何创建这样的行为。

下面是我的AddTextChangeListenerMethod()方法

private final TextWatcher vesselWatcher = new TextWatcher() {
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        public void onTextChanged(CharSequence s, int start, int before, int count) {
            txtVesselName.setVisibility(View.VISIBLE);
        }

        public void afterTextChanged(Editable s) {
            if (s.length() == 0)
            {
                txtVesselName.setVisibility(View.GONE);
            }
            else
            {

                SQLiteDatabase db = dbhelper.getWritableDatabase();
                Cursor cursor = db.rawQuery("select * from VesselList where Notation " + "= ? ", new String[]{etxtVesselCode.getText().toString().trim()});

                if (cursor.moveToFirst())
                {
                    do
                    {
                        strVesselsTypeName = cursor.getString(cursor.getColumnIndex("VesselsTypeName"));
                        Log.e("strVesselsTypeName", "=" + strVesselsTypeName);

                        SharedPreferences sp;
                        sp = getApplicationContext().getSharedPreferences(MyPREFERENCES, 0);
                        SharedPreferences.Editor e = sp.edit();
                        e.putString("xyz",etxtVesselCode.getText().toString().trim());
                        e.commit();

                    } while (cursor.moveToNext());
                }  db.close();

                txtVesselName.setText(strVesselsTypeName);
                btnPost.setEnabled(true);

                Log.e("afterTextChanged"," = "+strVesselsTypeName);
            }
        }
    };

Answer 1

在afterTextChanged（）中添加

btnPost.setClickable(true);

后，

btnPost.setEnabled(true);