onClick方法不起作用

Question

protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_play);
    gl = (GridLayout) findViewById(R.id.grid);
    array = new Button[7][6];
    Button btn;
    for(int i=0; i<7; i++)
    {
        for(int j=0; j<6; j++)
        {
            btn = new Button(this);
            btn.setId(7*i + j + 1);
            array[i][j] = btn;
            gl.addView(btn);
        }
    }
    turn = 0;
    Toast.makeText(this, "Test", Toast.LENGTH_SHORT).show();                

}

@Override
public void onClick(View v) 
{
    Toast.makeText(this, "Test1", Toast.LENGTH_SHORT).show();               
    if(v instanceof Button)
    {
        Toast.makeText(this, "Test2", Toast.LENGTH_SHORT).show();
        int[] d = GetCellByID(v.getId());
        Button b = (Button)v;
        b.setEnabled(false);
        if(turn == 0)
        {
            b.setBackgroundColor(Color.YELLOW);
            turn = 1;
        }
        else
        {
            b.setBackgroundColor(Color.RED);
            turn = 0;
        }
        array[d[0]][d[1]] = b;
    }
}

This is the code, the Toasts are for testing if what the code is running. The activity implements OnClickListener

The onClick method does not work, I used it because I have 42 buttons and I can't write 42 setOnClickListener() methods for each button.

In the code I create, in two loop, 42 buttons (7*6) and every time each button is pressed it would be disabled and change the background color of the button one time yellow next time red and again.

Answer 1

You are missing to call the following inside the nested for loop:

btn.setOnClickListener(this);

Here, this refers to Activity which implements OnClickListener

Answer 2

set the onClickListner for your button you have missed that.

for(int i=0; i<7; i++)
{
    for(int j=0; j<6; j++)
    {
        btn = new Button(this);
        btn.setId(7*i + j + 1);
        array[i][j] = btn;
        gl.addView(btn);
        btn.setOnClickListener(this);
    }
}

Answer 3

From the code snipper you've posted, I don't see anything linking the onClick method to your button(s).

Try adding

btn.setOnClickListener(this);

into the for-loop

Answer 4

onCreate（）中的调用方法

yourButton.setOnClickListener(this);

Answer 5

You must call method in your onCreate()

Try this :

yourbuttonname.setOnClickListener(this);

or

yourbuttonname.setOnClickListener(yourActivity.this);