Question

在功能delemaileditview()和delphoneeditview()中应该删除现有的Editview，但是存在未知的问题会阻止应用程序

public class MainActivity extends Activity {

    ArrayList<Contact> contact;
    Contact currentcontact;
    EditText nameArea,emailArea,phoneArea;
    int emails=0;
    int phones=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        nameArea=findViewById(R.id.name_area);
        emailArea=findViewById(R.id.e1);
        phoneArea=findViewById(R.id.p1);
        contact=new ArrayList<>();
    }
    public void buttonclick(View v){
        if(v.getId()==R.id.addemail){
            createemaileditview();
        }
        if(v.getId()==R.id.addphone){
            createphoneeditview();
        }
        if(v.getId()==R.id.save){

        }
        if(v.getId()==R.id.cancel){
        }
        if(v.getId()==R.id.delemail){
            delemaileditview();
        }
        if(v.getId()==R.id.delphone){
            delphoneeditview();

        }
    }
    protected void delemaileditview(){
        EditText v = findViewById((R.id.e1+emails));
        v.setVisibility(View.GONE);
        emails--;
    }
    protected void delphoneeditview(){
            EditText v = findViewById((R.id.p1+phones));
        ((ViewGroup)v.getParent()).removeView(v);
        phones--;
    }
    protected void createemaileditview(){
        Context context=getApplicationContext();
        EditText designation1 = new EditText(context);
        designation1.setSingleLine(true);
        designation1.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
        designation1.setPadding(14,30,14,30);
        designation1.setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.editview));
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        params.addRule(RelativeLayout.BELOW, R.id.e1+emails);
        RelativeLayout RL=findViewById(R.id.parentLayout);
        RL.addView(designation1, params);
        emails++;
        designation1.setId(R.id.e1+emails);
        designation1.setHint("email "+(emails+1));
    }
    protected void createphoneeditview(){
        Context context=getApplicationContext();
        EditText designation1 = new EditText(context);
        designation1.setPadding(14,30,14,30);
        designation1.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_CLASS_PHONE);
        designation1.setSingleLine(true);
        designation1.setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.editview));
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        params.addRule(RelativeLayout.BELOW, R.id.p1+phones);
        RelativeLayout RL=findViewById(R.id.parentLayout1);
        RL.addView(designation1, params);

        phones++;
        designation1.setId(R.id.p1+phones);
        designation1.setHint("phone no "+(phones+1));
    }


}

Answer 1

您可以使用HashMap存储要删除的视图。

例如，电子邮件视图：

HashMap<Integer, View> emailMap = new HashMap<>();
int emailIndex = 0;

protected void delEmailEditView(){
    if(emailMap.size() <= 0) return;
    View v = emailMap.remove(emailIndex);
    if(v == null) return;
    ((ViewGroup)v.getParent()).removeView(v);
    emailIndex--;

    // Get rid of any resources allocated to the view
    v = null;

    // If you just want to make it GONE
    //View view = emailMap.get(emailIndex);
    //view.setVisibility(View.GONE);
}

protected void createEmailEditView(){
    Context context=getApplicationContext();
    EditText designation1 = new EditText(context);
    designation1.setSingleLine(true);
    designation1.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);
    designation1.setPadding(14,30,14,30);
    designation1.setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.editview));
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    params.addRule(RelativeLayout.BELOW, R.id.e1+emails);
    RelativeLayout RL=findViewById(R.id.parentLayout);
    RL.addView(designation1, params);

    emailMap.put(emailIndex, designation1);
    emailIndex++;
    designation1.setHint("email " + emailIndex);
}

您可以对电话EditText视图进行模拟。

请注意，我无能为力，只能更改方法名称以更紧密地反映Java命名约定。我建议您为所有Android项目采用Java命名约定。

免责声明：

我没有测试此代码，所以如果您有任何问题，请告诉我。

单击按钮时删除一个EditView

1 个答案: