Question

如何在on-click（）类中的按钮上设置文本？我需要获取sq l select语句的按钮文本

 tableLayout.addView(tableRow);
    int a = 0;
    for (Integer j = 0; j < count; j++)
    {
        Button b = new Button(getApplicationContext());
        b.setText(c.getString(c.getColumnIndex("jour")));
         b.setId(a++);

        tableRow.addView(b);
        b.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                Integer fff = v.getId();
                Toast.makeText(getApplicationContext(), fff.toString(), Toast.LENGTH_SHORT).show();


                Log.d("TAG", "The index is");
            }
        });
        c.moveToNext() ;


enter code here

Answer 1

您可以键入caste the view to按钮并将其用于getText（）。

tableLayout.addView(tableRow);
int a = 0;
for (Integer j = 0; j < count; j++)
{
    Button b = new Button(getApplicationContext());
    b.setText(c.getString(c.getColumnIndex("jour")));
     b.setId(a++);

    tableRow.addView(b);
    b.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            Integer fff = v.getId();
            Toast.makeText(getApplicationContext(), fff.toString(),                
           Toast.LENGTH_SHORT).show();

          Button b = (Button)v;
           String buttonText = b.getText().toString();
            Log.d("TAG", "The text is " + buttonText);
        }
    });
    c.moveToNext() ;

Answer 2

您正在将Button添加到表格行tableRow.addView(b);。我一开始看代码看不到它。错过了。

所以让它成为最终

 final Button b = new Button(getApplicationContext());
 // Use ActivtiyContext
 final Button b = new Button(ActivityName.this);
 // posted a link at the end read it.

匿名类无法访问其封闭范围中未声明为final或者有效最终的局部变量。

http://docs.oracle.com/javase/tutorial/java/javaOO/anonymousclasses.html#accessing

在onClick内部

 public void onClick(View v) {

        String value = b.getText().toString()
        }

同时检查

When to call activity context OR application context?

Answer 3

按照我的方式创建String Array和：

String Title = new String[count];

现在实施如下：

 for (int j = 0; j < count; j++)
{
    Button b = new Button(getApplicationContext());
    b.setText(c.getString(c.getColumnIndex("jour")));
    b.setId(j);

    Title[a] = c.getString(c.getColumnIndex("jour");

    b.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v1) {

            Toast.makeText(getApplicationContext(), "Button click on(): "+Title[v1.getId()].toString(), Toast.LENGTH_SHORT).show();

            Log.d("TAG", "The index is: "+v1.getId());
        }
    });
    tableRow.addView(b);
    c.moveToNext() ;
  }

Answer 4

首先为按钮提供onclick事件（按钮点击）。

Answer 5

试试这段代码：

    public void onClick(View v) {

    String value = (Button)v.getText().toString()
    }

以编程方式设置并获取android按钮文本

5 个答案: