Android 按钮点击覆盖 [英] Android button onclick override

问题描述

我想创建一个具有预定义 onClick 的 CustomButton.事实上，我的对象会做同样的工作

I would like to create a CustomButton which has a predefined onClick. In fact, my object would do the same job than

CustomButton mButton = getViewById(..);
mButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
  show_something()
}

有没有办法将 Listener 嵌入到继承自 Button 的 CustomButton 对象中?我想要的是在我的布局 XML 文件中创建一个 CustomButton，而不必在我的活动中提到这个按钮，这会给出:

Is there a way to embed the Listener into the CustomButton object that inherits from Button ? What I would like is to create a CustomButton in my layout XML file, and not having to mention this button in my activity, which would give:

main.xml:

<LinearLayout xmlns:"...">
     <com.mypackage.view.CustomButton
         (attributes)/>
</LinearLayout>

CustomButton.java:

CustomButton.java:

class CustomButton extends Button implements... {

@Override
OnClick (or something like that, that's the core of my question, what to put here)
}

myActivity.java

myActivity.java

public class myActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    }
}

非常感谢.

推荐答案

你们真的很亲近:

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class CustomButton extends Button implements OnClickListener{

    public CustomButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public CustomButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CustomButton(Context context) {
        super(context);
        init();
    }

    private void init(){
        setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        // Do something
    }

}

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