如何从GridView的适配器中获取每个EditText的值？ [英] How to get the value of each EditText from an adapter from GridView?
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问题描述
我正在开发一个矩阵计算器应用程序，我无法弄清楚如何获取GridView中每个EditText的值。我需要获取这些值，以便将它们放入另一个矩阵并计算它。
如果用户想要使用3x2矩阵，则GridView看起来像这样。这是一个包含六个EditText的GridView，因为3 * 2 = 6
以上是上图中的XML：
< RelativeLayout
android：layout_width =368dp
android：layout_height =495dp
工具：layout_editor_absoluteX =8dp
工具：layout_editor_absoluteY =8dp>
TextView
android：id =@ + id / textView10
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_alignParentLeft =true
android：layout_alignParentStart =true
android：layout_alignParentTop =true
android：layout_marginLeft =15dp
android：layout_marginStart = 15dp
android：text =请在两个矩阵中输入数字。 />
TextView
android：id =@ + id / textView11
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_alignLeft =@ + id / textView10
android：layout_alignStart =@ + id / textView10
android：layout_below =@ + id / textView10
android：layout_marginTop =21dp
android：text =Matrix1：
android：textStyle =bold/>
< GridView
android：id =@ + id / grid
android：layout_width =match_parent
android：layout_height =300dp
android：layout_alignLeft =@ + id / textView11
android：layout_alignParentEnd =true
android：layout_alignParentRight =true
android：layout_alignStart =@ + id / textView11
android：layout_below =@ + id / textView11/>
TextView
android：id =@ + id / textView8
android：layout_width =wrap_content
android：layout_height =wrap_content
android：text =请填写所有字段
android：textColor =＃FF0000
android：visibility =invisible
android：layout_below =@ + id / grid
android：layout_alignLeft =@ + id / grid
android：layout_alignStart =@ + id / grid
android：layout_marginTop =15dp/>
android：id =@ + id / button4
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_alignLeft =@ + id / textView8
android：layout_alignStart =@ + id / textView8
android：layout_below =@ + id / textView8
android：layout_marginTop =11dp
android：onClick =setEmptyToZero
android：text =将Empy字段设置为零/>
android：id =@ + id / button5
android：layout_width =wrap_content
android：layout_height =wrap_content
android：layout_alignTop =@ + id / button4
android：layout_marginLeft =28dp
android：layout_marginStart =28dp
android：layout_toEndOf =@ + id / button4
android：layout_toRightOf =@ + id / button4
android：onClick =nextMatrix
android：text =Next Matrix/>
< / RelativeLayout>
以下是GridView项目的XML。我不知道如何从中获取值：
< EditText
android：id =@ + id / editText3
android：layout_width =50dp
android：layout_height =wrap_content
android：gravity =center
android：ems =10
android：inputType =numberDecimal/>
以下是GridView的MatrixAdapter：
public class MatrixAdapter extends BaseAdapter {
Context context;
列表< Matrix> matrixList;
//或创建一个int [rows] [columns]更改为此后
public MatrixAdapter（上下文上下文，列表< Matrix> matrixList）{
this.context =上下文;
this.matrixList = matrixList;
$ b @Override
public int getCount（）{
return matrixList.size（）;
}
@Override
public Object getItem（int i）{
return matrixList.get（i）;
}
@Override
public long getItemId（int i）{
return i;
}
@Override
public View getView（int i，View view，ViewGroup viewGroup）{
View v = View.inflate（context，R.layout。 grid_item，NULL）;
return v;
}
}
和Matrix类：
public class Matrix {
public int i;
public int j;
public Matrix（int i，int j）
{
this.i = i;
this.j = j;
$ b $ p $最后，这里是我所在的Java代码从GridView中的每个EditText获得值，但我不知道该怎么做：
私人MatrixAdapter适配器;
私人列表< Matrix> matrixList;
private int rows;
private int列;
@Override
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
setContentView（R.layout.activity_add_subtract_matrix_input）;
//获得矩阵的矩阵
Bundle extras = getIntent（）。getExtras（）;
rows = extras.getInt（rows）;
列= extras.getInt（列）;
// MATRIX 1 INPUT
//初始化网格
GridView grid =（GridView）findViewById（R.id.grid）;
grid.setNumColumns（columns）;
//创建一个矩阵对象列表
//或者创建一个EditText [rows] [columns]将其更改为
// Matrix [] [] matrix1 = new矩阵[行] [列];
matrixList = new ArrayList<>（）; //这仅仅适用于EDIT_TEXTS矩阵
//获取矩阵值将来自用户输入
//向每个项目添加一些内容
for（int i = 0; i
for（int j = 0; j
matrixList.add（new Matrix（i，j ））;
//创建一个适配器（矩阵适配器）
adapter = new MatrixAdapter（getApplicationContext（），matrixList）;
//连接到网格的适配器
grid.setAdapter（adapter）;
}
public void nextMatrix（View view）//按钮进入下一个矩阵
{
//它收集用户输入的内容太
//检查一个字段是否为空
//但是如何从每个EditText获取值？
}
public void setEmptyToZero（View view）//将空文本框填充为零
{
//如何使程序添加零到文本字段？
//首先遍历textField矩阵。如果一个空字段是
//找到，则向其添加零
EditText textField;
布尔型fieldIsEmpty;
for（int i = 0; i
for（int j = 0; j
//如何从EditText矩阵获取值？
解决方案我希望这段代码能帮助你，
@Override
public View getView（int position，View convertView，ViewGroup父类）{
ViewHolder viewHolder;
if（convertView == null）{
convertView = LayoutInflater.from（context）.inflate（R.layout.R.layout.grid_item，parent，false）;
viewHolder = new ViewHolder（convertView）;
convertView.setTag（viewHolder）;
} else {
viewHolder =（ViewHolder）convertView.getTag（）;
}
项目currentItem =（Item）getItem（position）;
viewHolder.itemName.setText（currentItem.getItemName（））; //如果已经在你的列表中：
return convertView;
}
私人类ViewHolder {
EditText itemName;
pre $ public ViewHolder（View view）{
itemName =（EditText）view.findViewById R.id.editText3）;
itemname.setOnClickListener（new View.OnClickListener（）{
@Override
public void onClick（View v）{
String text = itemName..getText（）。toString（） ;
}
}）;
}
}
I'm working on a Matrix Calculator app and I'm having trouble figuring out how to get a value of each EditText that are in the GridView. I need to get the values in order to put them in another matrix and calculate it.
Here is what the GridView looks like if the user wanted to use a 3x2 matrix. It's a GridView containing six EditTexts because 3*2=6
Here is the XML for that picture above:
<RelativeLayout
android:layout_width="368dp"
android:layout_height="495dp"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp">
<TextView
android:id="@+id/textView10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="15dp"
android:layout_marginStart="15dp"
android:text="Please input the numbers on both matrices." />
<TextView
android:id="@+id/textView11"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView10"
android:layout_alignStart="@+id/textView10"
android:layout_below="@+id/textView10"
android:layout_marginTop="21dp"
android:text="Matrix1: "
android:textStyle="bold" />
<GridView
android:id="@+id/grid"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_alignLeft="@+id/textView11"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_alignStart="@+id/textView11"
android:layout_below="@+id/textView11" />
<TextView
android:id="@+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Please fill in all of the fields"
android:textColor="#FF0000"
android:visibility="invisible"
android:layout_below="@+id/grid"
android:layout_alignLeft="@+id/grid"
android:layout_alignStart="@+id/grid"
android:layout_marginTop="15dp" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView8"
android:layout_alignStart="@+id/textView8"
android:layout_below="@+id/textView8"
android:layout_marginTop="11dp"
android:onClick="setEmptyToZero"
android:text="Set Empy Fields to Zero" />
<Button
android:id="@+id/button5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/button4"
android:layout_marginLeft="28dp"
android:layout_marginStart="28dp"
android:layout_toEndOf="@+id/button4"
android:layout_toRightOf="@+id/button4"
android:onClick="nextMatrix"
android:text="Next Matrix" />
</RelativeLayout>
Here is the XML for the GridView items. I don't know how to get the values from them:
<EditText
android:id="@+id/editText3"
android:layout_width="50dp"
android:layout_height="wrap_content"
android:gravity="center"
android:ems="10"
android:inputType="numberDecimal" />
Here is the MatrixAdapter for the GridView:
public class MatrixAdapter extends BaseAdapter {
Context context;
List<Matrix> matrixList;
//Or create an int[rows][columns] CHANGE INTO THAT LATER
public MatrixAdapter(Context context, List<Matrix> matrixList) {
this.context = context;
this.matrixList = matrixList;
}
@Override
public int getCount() {
return matrixList.size();
}
@Override
public Object getItem(int i) {
return matrixList.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
View v=View.inflate(context,R.layout.grid_item,null);
return v;
}
}
And the Matrix class:
public class Matrix {
public int i;
public int j;
public Matrix(int i, int j)
{
this.i = i;
this.j = j;
}
}
And finally, here is the Java code where I am going to get the values from each EditText in GridView, but I don't know how to do that:
private MatrixAdapter adapter;
private List<Matrix> matrixList;
private int rows;
private int columns;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_subtract_matrix_input);
// GET THE MATRIX DIMENSIONS FOR BOTH MATRICES
Bundle extras = getIntent().getExtras();
rows = extras.getInt("rows");
columns = extras.getInt("columns");
//MATRIX 1 INPUT
// INITIALISE THE GRID
GridView grid=(GridView)findViewById(R.id.grid);
grid.setNumColumns(columns);
// CREATE A LIST OF MATRIX OBJECTS
//Or create an EditText[rows][columns] CHANGE INTO THAT LATER
//Matrix[][] matrix1 = new Matrix[rows][columns];
matrixList = new ArrayList<>(); //THIS IS ONLY FOR THE MATRIX OF EDIT_TEXTS
//Getting the matrix values will come from the user input
// ADD SOME CONTENTS TO EACH ITEM
for (int i=0;i<rows;i++)
{
for (int j=0;j<columns;j++)
{
matrixList.add(new Matrix(i,j));
}
}
// CREATE AN ADAPTER (MATRIX ADAPTER)
adapter = new MatrixAdapter(getApplicationContext(),matrixList);
// ATTACH THE ADAPTER TO GRID
grid.setAdapter(adapter);
}
public void nextMatrix(View view) //The button goes to the next matrix
{
//It collects what the user inputted too
//Checks if one of the fields are empty
//But how to get the values from each EditText?
}
public void setEmptyToZero(View view) //Fills the empty text boxes to zero
{
//how to make the program add zeros to the text fields?
//iterate through the textField matrix first. If an empty field is
//found, add zero to it
EditText textField;
boolean fieldIsEmpty;
for (int i=0;i<rows;i++)
{
for (int j=0;j<columns;j++)
{
//How to get values from the EditText Matrix?
}
}
}
解决方案
I hope this code will help you,
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.R.layout.grid_item, parent, false);
viewHolder = new ViewHolder(convertView);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
Item currentItem = (Item) getItem(position);
viewHolder.itemName.setText(currentItem.getItemName()); // if already in your list:
return convertView;
}
private class ViewHolder { EditText itemName;
public ViewHolder(View view) {
itemName = (EditText)view.findViewById(R.id.editText3);
itemname.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String text = itemName..getText().toString();
}
});
}
}
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