在安卓系统中防止双击按钮的最佳方法是什么?
当前回答
通用解决方案
@Override
public void onClick(View v) {
tempDisableButton(v);
//all the buttons view..
}
public void tempDisableButton(View viewBtn) {
final View button = viewBtn;
button.setEnabled(false);
button.postDelayed(new Runnable() {
@Override
public void run() {
button.setEnabled(true);
}
}, 3000);
}
其他回答
似乎设置你的点击监听器在onResume和空他们在onPause也有技巧。
如果你在onClick()中进行计算密集型工作,则禁用按钮或设置不可点击是不够的,因为单击事件可以在禁用按钮之前排队。我写了一个实现OnClickListener的抽象基类,你可以重写,通过忽略任何排队点击来修复这个问题:
/**
* This class allows a single click and prevents multiple clicks on
* the same button in rapid succession. Setting unclickable is not enough
* because click events may still be queued up.
*
* Override onOneClick() to handle single clicks. Call reset() when you want to
* accept another click.
*/
public abstract class OnOneOffClickListener implements OnClickListener {
private boolean clickable = true;
/**
* Override onOneClick() instead.
*/
@Override
public final void onClick(View v) {
if (clickable) {
clickable = false;
onOneClick(v);
//reset(); // uncomment this line to reset automatically
}
}
/**
* Override this function to handle clicks.
* reset() must be called after each click for this function to be called
* again.
* @param v
*/
public abstract void onOneClick(View v);
/**
* Allows another click.
*/
public void reset() {
clickable = true;
}
}
用法与OnClickListener相同,但重写OnOneClick()代替:
OnOneOffClickListener clickListener = new OnOneOffClickListener() {
@Override
public void onOneClick(View v) {
// Do stuff
this.reset(); // or you can reset somewhere else with clickListener.reset();
}
};
myButton.setOnClickListener(clickListener);
The Best and simple solution i found is
1. to create a boolean and set as false (default) like
private boolean itemClicked = false;
/* for a safer side you can also declare boolean false in onCreate() also. */
and at onclick() method check
2. if(!itemClicked)
{
itemClicked = true;
// rest of your coding functionality goes here of onClick method.
}
3. last step is to set boolean false in onResume()
@override
onResume()
{
super.onResume(0);
itemClicked = false;
}
具有Kotlin扩展功能:
fun View.onSingleClick(action: (v: View) -> Unit) {
setOnClickListener(object : View.OnClickListener {
override fun onClick(v: View) {
isClickable = false
action(v)
postDelayed({ isClickable = true }, 700)
}
})
}
用法:
button.onSingleClick { myAction() }
下面是一个OnClickListener代理,它可以根据qezt的答案阻止连续的单击。
import android.os.SystemClock;
import android.view.View;
public class MultiClickGuard implements View.OnClickListener {
private long mLastClickTime;
private final int mThresholdMillis;
private final View.OnClickListener mListener;
public MultiClickGuard(View.OnClickListener listener, int thresholdMillis) {
if (listener == null) {
throw new NullPointerException("Null OnClickListener");
}
if (thresholdMillis < 0) {
throw new IllegalArgumentException("Negative click threshold: " + thresholdMillis);
}
mListener = listener;
mThresholdMillis = thresholdMillis;
}
@Override
public void onClick(View v) {
// Using a time threshold to prevent successive clicks.
if (SystemClock.elapsedRealtime() - mLastClickTime < mThresholdMillis) {
return;
}
mLastClickTime = SystemClock.elapsedRealtime();
// Forward the click event to the *real* listener.
mListener.onClick(v);
}
}
用法示例
button.setOnClickListener(new MultiClickGuard(new View.OnClickListener() {
@Override
public void onClick(View v) {
// do something
}
}, 1000));
button.setOnClickListener(new MultiClickGuard(v -> {...}, 1000));
button.setOnClickListener(new MultiClickGuard(v -> doSomething(), 1000));
在试图阻止启动一个活动的多个实例的情况下,考虑指定启动模式:理解任务和返回堆栈,这是可靠的方式。
如果您试图阻止打开一个对话框片段的多个实例,您可以检查片段管理器是否已经包含了对话框,例如getSupportFragmentManager(). findfragmentbytag (tag)。
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