Android中三种onClick的实现方式与对比

button btn_tomain2 = findviewbyid(r.id.btn_tomain2);
btn_tomain2.setonclicklistener(new staticmyonclicklistener(tv_hello));

static class staticmyonclicklistener implements view.onclicklistener{
    private final textview tv_hello;

    public staticmyonclicklistener(textview tv_hello) {
        this.tv_hello = tv_hello;
    }

    @override
    public void onclick(view view) {
        tv_hello.settextcolor(0xffff0000);
    }
}

button btn_tomain3 = findviewbyid(r.id.btn_tomain3);
btn_tomain3.setonclicklistener(new myonclicklistener());

class myonclicklistener implements view.onclicklistener{
    @override
    public void onclick(view view) {
        // 可以直接访问activity成员
        tv_hello.settextcolor(0xffff0000);
    }
}

public class mainactivity extends appcompatactivity implements view.onclicklistener {
    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);
        
        button btn_tomain5 = findviewbyid(r.id.btn_tomain5);
        btn_tomain5.setonclicklistener(this);
    }

​​​​​​​    @override
    public void onclick(view view) {
        if(view.getid() == r.id.btn_tomain5){
            intent intent = new intent();
            intent.setclass(this, mainactivity5.class);
            startactivity(intent);
        }
    }
}

button.setonclicklistener(v -> {
    // 处理点击
});

button mybutton = findviewbyid(r.id.my_button);

// 点击事件
mybutton.setonclicklistener(v -> {
    if (!islongpress) { // 添加标志位判断
        log.d("buttonevent", "正常点击事件触发");
        // 点击事件处理逻辑
    }
});

// 长按事件
mybutton.setonlongclicklistener(v -> {
    log.d("buttonevent", "长按事件触发");
    islongpress = true;
    // 长按事件处理逻辑
    
    // 延迟重置标志位
    new handler().postdelayed(() -> islongpress = false, 300);
    return true; // 必须返回true表示消费事件
});

// 类成员变量
private boolean islongpress = false;

private long lasteventtime;

mybutton.setontouchlistener((v, event) -> {
    switch (event.getaction()) {
        case motionevent.action_down:
            lasteventtime = system.currenttimemillis();
            break;
        case motionevent.action_up:
            if (system.currenttimemillis() - lasteventtime < 500) {
                log.d("buttonevent", "点击事件");
            }
            break;
    }
    return false;
});

mybutton.setonlongclicklistener(v -> {
    log.d("buttonevent", "长按事件");
    return true;
});

class mygesturelistener extends gesturedetector.simpleongesturelistener {
    @override
    public boolean onsingletapconfirmed(motionevent e) {
        log.d("buttonevent", "点击事件");
        return true;
    }

    @override
    public void onlongpress(motionevent e) {
        log.d("buttonevent", "长按事件");
    }
}

// 在activity中：
gesturedetector gesturedetector = new gesturedetector(this, new mygesturelistener());

mybutton.setontouchlistener((v, event) -> {
    gesturedetector.ontouchevent(event);
    return true;
});

// 禁用按钮
mybutton.setenabled(false); 

// 启用按钮
mybutton.setenabled(true);

// 检查按钮状态
boolean isenabled = mybutton.isenabled();

<!-- res/drawable/button_state.xml -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_enabled="false" android:drawable="@drawable/btn_disabled" />
    <item android:state_enabled="true" android:drawable="@drawable/btn_enabled" />
</selector>

// 应用状态drawable
mybutton.setbackgroundresource(r.drawable.button_state);

// 同时改变文字颜色
mybutton.settextcolor(getresources().getcolorstatelist(r.color.button_text_color));

mybutton.setenabled(false);
mybutton.setalpha(0.5f); // 半透明效果

mybutton.setenabled(true);
mybutton.setalpha(1.0f); // 恢复不透明

public class buttonstatemanager {
    public static void disablebutton(button button) {
        button.setenabled(false);
        button.setalpha(0.5f);
        button.settextcolor(color.gray);
    }
    
    public static void enablebutton(button button) {
        button.setenabled(true);
        button.setalpha(1.0f);
        button.settextcolor(color.black);
    }
}

// 使用示例
buttonstatemanager.disablebutton(mybutton);

<button
    android:enabled="@{viewmodel.isbuttonenabled}"
    android:onclick="@{() -> viewmodel.onbuttonclick()}"
    android:backgroundtint="@{viewmodel.isbuttonenabled ? @color/active : @color/inactive}" />

if (!mybutton.isenabled()) {
    mybutton.settooltiptext("请先完成上一步操作");
}