java 如何更改 Android 按钮颜色 onClick？
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How to change Android button color onClick?
提问by user1871869
I wanted to change the android button color every time I click on a button. Once a user clicks a button, I want it so that the color changes. Then, when the button is pressed again, the color reverts back to what it was before. Here is my attempt:
每次单击按钮时，我都想更改 android 按钮的颜色。一旦用户单击一个按钮，我希望它改变颜色。然后，当再次按下按钮时，颜色会恢复到之前的颜色。这是我的尝试：
private void setupFollowButton(Button button, final Boolean isClicked) {
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Boolean isClickedDummy = !isClicked;
if(isClickedDummy) {
v.setBackgroundColor(Color.parseColor("#FF0000"));
} else {
v.setBackgroundColor(Color.parseColor("#FFFFFF"));
}
}
});
}
Originally I wanted it so that isClicked = !isClickedso that I would know for certain that the isClickedvariable has changed and I can change the color. However, the method I have above only changes the isClickedto false and I can't seem to change it back to true. Is there any way I can figure this out? Any help would be appreciated. Thanks!
最初我想要它，isClicked = !isClicked这样我就可以肯定地知道isClicked变量已经改变并且我可以改变颜色。但是，我上面的方法仅将 更改isClicked为 false，而我似乎无法将其更改回true. 有什么办法可以解决这个问题吗？任何帮助，将不胜感激。谢谢！
回答by Ahmad Aghazadeh
You can xml drawable :
你可以 xml drawable ：
<Button
android:id="@+id/button1"
android:background="@drawable/selector_xml_name"
android:layout_width="200dp"
android:layout_height="126dp"
android:text="Hello" />
selector_xml_name.xml
selector_xml_name.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/numpad_button_bg_selected" android:state_selected="true"></item>
<item android:drawable="@drawable/numpad_button_bg_pressed" android:state_pressed="true"></item>
<item android:drawable="@drawable/numpad_button_bg_normal"></item>
</selector
回答by Vyacheslav
Do not forget to remove BackgroundResourceof your button if you want to change the background color.
BackgroundResource如果您想更改背景颜色，请不要忘记删除您的按钮。
That is, use:
也就是说，使用：
btn.setBackgroundResource(0);
btn.setBackgroundResource(0);
After that, 'usual button layout' will disappear and I will show the changes of setBackgroundmethod.
之后，“通常的按钮布局”将消失，我将展示setBackground方法的变化。
回答by Hello World
try this:
试试这个：
isClicked = false;
private void setupFollowButton(Button button, final Boolean isClicked) {
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(isClicked) {
v.setBackgroundColor(Color.parseColor("#FF0000"));
isClicked = false;
} else {
v.setBackgroundColor(Color.parseColor("#FFFFFF"));
isClicked = true;
}
}
});
}
回答by michoprogrammer
You have to change the value of "isClickedDummy" and you have to use it as global.
您必须更改“isClickedDummy”的值，并且必须将其用作全局值。
Boolean isClickedDummy; // global after the declaration of your class
isClickedDummy = true; // in your onCreate()
private void setupFollowButton(Button button, final Boolean isClicked) {
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(isClickedDummy) {
v.setBackgroundColor(Color.parseColor("#FF0000"));
isClickedDummy = false;
} else {
v.setBackgroundColor(Color.parseColor("#FFFFFF"));
isClickedDummy = true;
}
}
});
}
