我是Android Studio的新手，我正在一个项目中，该项目需要一个带有从SQLite填充值的微调器。我需要根据用户从微调器中所做的选择来更改图像（图标）。
我尝试为自定义布局上的TextView制作android：clickable =“ false”。但这并不能解决。每当用户触摸微调框时，我还使用了spinner.setOnTouchListener来更新列表。
categoryspinner_layout.xml（自定义布局）
<TextView
android:id="@+id/category"
android:layout_width="match_parent"
android:layout_height="40dp"
android:clickable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:textAppearance="@style/TextAppearance.AppCompat.Medium">
</TextView>
</LinearLayout>
微调框布局。 （具有多个微调器，但没有自定义布局）
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ViewTransfers">
<TextView
android:id="@+id/filterDateStart"
android:layout_width="200dp"
android:layout_height="40dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:ems="10"
android:hint="Date"
android:inputType="date"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/linearLayout3" />
<Button
android:id="@+id/addFilterDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="ADD DATE"
app:layout_constraintStart_toEndOf="@+id/filterDateStart"
app:layout_constraintTop_toBottomOf="@+id/linearLayout3" />
<TextView
android:id="@+id/filterMode"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:ems="10"
android:inputType="textPersonName"
android:text="Recurring"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/mop_viewTransfer" />
<Button
android:id="@+id/viewTranfers"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="56dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:text="View Transfer"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.477"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/recurring_viewTransfer" />
<EditText
android:id="@+id/deleteCatID"
android:layout_width="124dp"
android:layout_height="66dp"
android:layout_marginStart="28dp"
android:layout_marginLeft="28dp"
android:layout_marginTop="70dp"
android:ems="10"
android:hint="Enter an ID"
android:inputType="number"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/viewTranfers" />
<Button
android:id="@+id/delTransfer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="106dp"
android:layout_marginLeft="106dp"
android:layout_marginTop="70dp"
android:layout_marginEnd="73dp"
android:layout_marginRight="73dp"
android:text="DELETE"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toEndOf="@+id/deleteCatID"
app:layout_constraintTop_toBottomOf="@+id/viewTranfers" />
<Spinner
android:id="@+id/mop_viewTransfer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="12dp"
android:layout_marginRight="12dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView4" />
<Spinner
android:id="@+id/recurring_viewTransfer"
android:layout_width="wrap_content"
android:layout_height="28dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="12dp"
android:layout_marginEnd="12dp"
android:layout_marginRight="12dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/filterMode" />
<TextView
android:id="@+id/textView4"
android:layout_width="166dp"
android:layout_height="25dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:text="Mode of payment"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/amount_filter" />
<EditText
android:id="@+id/amount_filter"
android:layout_width="142dp"
android:layout_height="42dp"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginEnd="52dp"
android:layout_marginRight="52dp"
android:ems="10"
android:hint="Amount"
android:inputType="numberDecimal"
app:layout_constraintEnd_toStartOf="@+id/currency_filter"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/addFilterDate" />
<Spinner
android:id="@+id/currency_filter"
android:layout_width="96dp"
android:layout_height="41dp"
android:layout_marginStart="52dp"
android:layout_marginLeft="52dp"
app:layout_constraintStart_toEndOf="@+id/amount_filter"
app:layout_constraintTop_toBottomOf="@+id/addFilterDate" />
<LinearLayout
android:id="@+id/linearLayout3"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_marginStart="12dp"
android:layout_marginLeft="12dp"
android:layout_marginTop="60dp"
android:layout_marginEnd="12dp"
android:layout_marginRight="12dp"
android:orientation="horizontal"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<Spinner
android:id="@+id/filterCategory"
android:layout_width="299dp"
android:layout_height="41dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_weight="1"
android:ems="10"
android:inputType="textPersonName" />
<ImageView
android:id="@+id/imageView"
android:layout_width="46dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:clickable="false"
android:focusable="false"
android:focusableInTouchMode="false"
android:src="@drawable/imageview1" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
OnItemSelected
package com.example.watch;
import android.app.DatePickerDialog;
import android.database.Cursor;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Calendar;
public class ViewTransfers extends AppCompatActivity implements DatePickerDialog.OnDateSetListener, AdapterView.OnItemSelectedListener {
EditText deleteIDs, amount;
TextView startDate;
Button view, delete , addDate;
Spinner mop_ViewTransfer,recurring_ViewTransfer,currency,category;
DatabaseHelper myDb;
DataHelper cDb;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_transfers);
myDb = new DatabaseHelper(this);
deleteIDs=(EditText) findViewById(R.id.deleteCatID);
category =(Spinner) findViewById(R.id.filterCategory);
startDate =(TextView) findViewById(R.id.filterDateStart);
amount=(EditText) findViewById(R.id.amount_filter);
currency=(Spinner) findViewById(R.id.currency_filter);
recurring_ViewTransfer=(Spinner) findViewById(R.id.recurring_viewTransfer);
mop_ViewTransfer=(Spinner) findViewById(R.id.mop_viewTransfer);
view = (Button) findViewById(R.id.viewTranfers);
delete=(Button) findViewById(R.id.delTransfer);
addDate = (Button) findViewById(R.id.addFilterDate);
implementValue();
addDate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DialogFragment datePicker=new DatePickerFrangment();
datePicker.show(getSupportFragmentManager(),"date picker");
}
});
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String categoryS , startDateS, recurrentS, modeS,amountS,currencyS;
categoryS = category.getSelectedItem().toString();
startDateS= startDate.getText().toString();
amountS=amount.getText().toString();
currencyS=currency.getSelectedItem().toString();
modeS= mop_ViewTransfer.getSelectedItem().toString();
recurrentS= recurring_ViewTransfer.getSelectedItem().toString();
if (amountS.length()!=0) amountS = amountS+" "+currencyS;
Cursor res = myDb.getFilteredData( categoryS , startDateS,amountS, modeS,recurrentS);
if (res.getCount() == 0) {
showMessage("Error", "No records found!");
return;
}
StringBuffer buffer = new StringBuffer();
while (res.moveToNext()) {
buffer.append("ID : " + res.getString(0) + "\n");
buffer.append("Category : " + res.getString(1) + "\n");
buffer.append("Date : " + res.getString(2) + "\n");
buffer.append("Amount : " + res.getString(3) + "\n");
buffer.append("Payment : " + res.getString(4) + "\n");
buffer.append("Recurring : " + res.getString(5) + "\n");
buffer.append("Comments : " + res.getString(6) + "\n \n");
}
showMessage("Money Tracker", buffer.toString());
}
});
delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String text =deleteIDs.getText().toString();
if (text.length() != 0) {
Integer IDs = Integer.parseInt(text) ;
boolean check = myDb.deleteTransfer(IDs);
if (check == true) {
Toast.makeText(ViewTransfers.this, "Data deleted!", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(ViewTransfers.this, "Something went wrong!", Toast.LENGTH_LONG).show();
}
}
else {
Toast.makeText(ViewTransfers.this,"Enter a valid ID!",Toast.LENGTH_LONG).show();
}
}
});
}
public void showMessage(String title, String Message){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setCancelable(true);
builder.setTitle(title);
builder.setMessage(Message);
builder.show();
}
@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR,year);
c.set(Calendar.MONTH,month);
c.set(Calendar.DAY_OF_MONTH,dayOfMonth);
String currentDateString= DateFormat.getDateInstance().format(c.getTime());
startDate.setText(currentDateString); }
public void implementValue(){
Spinner recurring_ViewTransfer = findViewById(R.id.recurring_viewTransfer);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.transaction, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
recurring_ViewTransfer.setAdapter(adapter);
recurring_ViewTransfer.setOnItemSelectedListener(this);
Spinner mop_ViewTransfer = findViewById(R.id.mop_viewTransfer);
ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this,
R.array.mop, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mop_ViewTransfer.setAdapter(adapter2);
mop_ViewTransfer.setOnItemSelectedListener(this);
Spinner currency = findViewById(R.id.currency_filter);
ArrayAdapter<CharSequence> adapter3 = ArrayAdapter.createFromResource(this,
R.array.currency, android.R.layout.simple_spinner_item);
adapter3.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
currency.setAdapter(adapter3);
currency.setOnItemSelectedListener(this);
categoryspin();
/* category.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
categoryspin();
return false;
}
});
*/
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (parent.getId()) {
case R.id.filterCategory : {
String category1 = category.getSelectedItem().toString();
Toast.makeText(ViewTransfers.this, category1, Toast.LENGTH_SHORT).show();
/*String category1 = category.getSelectedItem().toString();
String img = cDb.getIcon(category1);
imgIcon = (ImageView) findViewById(R.id.imageView);
int resID = getResources().getIdentifier(img, "drawable", getPackageName());
imgIcon.setImageResource(resID);*/
}
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
public void categoryspin(){
cDb = new DataHelper(this);
ArrayList<String> list = cDb.getAllCategories();
ArrayAdapter<String> adapter3 = new ArrayAdapter<>(this, R.layout.categoryspinner_layout, R.id.category, list);
category.setAdapter(adapter3);
}
}
There ain't any error message. When I open the page it gave me a toast message of the 1st entry in the spinner. After that nothing happens when I click on it.
答案 0 :(得分：0)
我检查了您的代码，您必须根据当前的代码进行这样的编码，您已经在活动上下文中实现了事件。并且您还没有为事件侦听器编写代码。
public void categoryspin(){
cDb = new DataHelper(this);
ArrayList<String> list = cDb.getAllCategories();
ArrayAdapter<String> adapter3 = new ArrayAdapter<>(this, R.layout.categoryspinner_layout, R.id.category, list);
category.setAdapter(adapter3);
/*Add this line and it will start working with your existing code to handle spinner onItemSelected
event, Happy coding...*/
category.setOnItemSelectedListener(this);
}
注意：尝试使用正确的命名约定，它将帮助您轻松地识别/查看代码并解决错误。
此外，此问题也不在于您从SQLite数据库获取的值。