Android中edittext按键事件的双时间数据插入

当用户按下done/next/enter按钮时，我正在调用db-helper的方法，但该代码执行了两次，数据在表中输入了两次

以下是编辑文本的我的按键事件：

editTextLitre.setOnKeyListener(new OnKeyListener() {

                @Override
                public boolean onKey(View v, int keyCode, KeyEvent event) {
                    // TODO Auto-generated method stub
                    switch(keyCode){
                    case KeyEvent.KEYCODE_ENTER:
                        TextView txtlitres = (TextView)findViewById(R.id.edit_text_litre);
                        TextView totalamount = (TextView)findViewById(R.id.amount);

                        RadioButton rbBuffalo = (RadioButton) findViewById(R.id.radioBuffalo);

                        RadioButton rbCow = (RadioButton) findViewById(R.id.radioCow);
                        rbBuffalo.setText(Constants.Buffalo.toString());
                        rbCow.setText(Constants.Cow.toString());
                        radioanimal= (RadioGroup)findViewById(R.id.radioCategory);
                        int selectedid = radioanimal.getCheckedRadioButtonId();

                        rb = (RadioButton)findViewById(selectedid);


                        DBHelper dh=new DBHelper(getApplicationContext());
                        // TODO Auto-generated method stub
                        boolean save = dh.insertMilkDetails(mandali,rb.getText().toString(),totalamount.getText().toString(),txtlitres.getText().toString(),dt.toString(),session.toString());

                        if(save == true)
                        {
                             Toast.makeText(getApplicationContext(), "Details Saved Successfully", Toast.LENGTH_SHORT).show();

                        }

                    return false;
                }
            });

---

我不明白为什么数据会在数据库表中插入两次。

这很简单，按键过程中每个动作都会生成按键事件（即向下键和向上键）。您的代码检查键代码类型，但不验证事件是

ACTION\u DOWN

还是

ACTION\u UP

传入的

KeyEvent

对象为您提供此信息（）；您可能只想执行向上插入操作

---

由于您正在使用

EditText

，另一个可能更好的选项是

OnEditorActionListener

（），它不需要您检查这些内容。

将代码更改为：

    editTextLitre.setOnKeyListener(new OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // TODO Auto-generated method stub
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                switch (keyCode) {
                    case KeyEvent.KEYCODE_ENTER:
                        TextView txtlitres = (TextView) findViewById(R.id.edit_text_litre);
                        TextView totalamount = (TextView) findViewById(R.id.amount);

                        RadioButton rbBuffalo = (RadioButton) findViewById(R.id.radioBuffalo);

                        RadioButton rbCow = (RadioButton) findViewById(R.id.radioCow);
                        rbBuffalo.setText(Constants.Buffalo.toString());
                        rbCow.setText(Constants.Cow.toString());
                        radioanimal = (RadioGroup) findViewById(R.id.radioCategory);
                        int selectedid = radioanimal.getCheckedRadioButtonId();

                        rb = (RadioButton) findViewById(selectedid);


                        DBHelper dh = new DBHelper(getApplicationContext());
                        // TODO Auto-generated method stub
                        boolean save = dh.insertMilkDetails(mandali, rb.getText().toString(), totalamount.getText().toString(), txtlitres.getText().toString(), dt.toString(), session.toString());

                        if (save == true) {
                            Toast.makeText(getApplicationContext(), "Details Saved Successfully", Toast.LENGTH_SHORT).show();

                        }

                        return false;
                }
            }
        });

我更改的内容：

if（event.getAction（）==KeyEvent.ACTION\u DOWN）{…

因为当您按下一个键时，

onKey

事件会发生两次：按下时一次，松开键时一次