Question

如果我想在此课程中添加一个按钮以便我可以调用onclicklistener，我应该怎么做？我还提供了我要添加此视图的活动类。

活性：

import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.RelativeLayout;

import android.content.Context;



public class NewGame extends Activity {

View view;
Context context;
RelativeLayout layout;
GameView gameview;

@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    gameview=new GameView(this);
    setContentView(gameview);
    //layout = (RelativeLayout) findViewById(R.id.relative_layout);



    //layout.addView(gameview);

}


}

视图：公共类GameView扩展View { 路径圈; 油漆cPaint; 油漆tPaint; 字符串z; int i = 65，strt，arc，leftx，topy，rightx，bottomy，maxx，maxy; boolean flag1，flag2，flag3; 双n1，n2; int n，n3 = 180，n4，n5 = 90; float f1 = 180，f2 = 90; 按钮b1; 随机r = new Random（）; RectF椭圆形;

    public GameView(Context context) {
        super(context);

        leftx = 0;
        topy = 60;
        rightx = 150;
        bottomy = 120;

        z = String.valueOf(Character.toChars(i));

        cPaint = new Paint();
        cPaint.setColor(Color.RED);

        strt = 45;
        arc = 315;

        n1 = Math.random() * 600;
        Log.d("random", z);

        if (flag2 == false)
            new DrawThread(this);

        // cPaint.setStrokeWidth(2);
        tPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        tPaint.setStyle(Paint.Style.FILL_AND_STROKE);
        tPaint.setColor(Color.BLACK);
        float scale = getResources().getDisplayMetrics().scaledDensity;
        tPaint.setTextSize(20 * scale);
    }

    public void onSizeChanged(int w,int h,int oldh,int oldw) {
        maxx = oldw;
        maxy = oldh;
    }

    //@Override
    protected void onDraw(Canvas canvas) {
        // Drawing commands go here
        oval = new RectF(leftx,topy,rightx,bottomy);
        canvas.drawArc(oval, strt, arc, true, cPaint);
        while (i < 90)  {
            canvas.drawText(String.valueOf(Character.toChars(i)),f1,f2, tPaint);
            break;
        }
    }
}

Answer 1

你可以这样做：

Button bt = new Button(this);
bt.setText("A Button");
bt.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
linerLayout.addView(bt);

然后你可以这样做

bt.setOnClickListener(new View.OnClickListener() {

//TO DO
}

我希望这可以帮到你。

Answer 2

首先，为了让您的自定义视图具有addView（View v）方法，它必须扩展ViewGroup而不是View;那么你可以使用这段代码

b1=new Button(context);
b1.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT ));
b1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

            }
        });
        this.addView(b1);

以编程方式将按钮添加到视图上

2 个答案: