App中,有很大一部分场景是点击按钮,向服务端提交数据,由于网络请求需要时间,用户很可能会多次点击,造成数据重复提交,造成各种莫名其妙的问题。
因此,防止按钮多次点击,是Android开发中一个很重要的技术手段。
以前的处理方式
网上查找到的,或者你可能会想到的方法大概有这些:
1.每个按钮点击事件中,记录点击时间,判断是否超过点击时间间隔
public class ClickActivity extends AppCompatActivity {
private long mLastClickTime = 0;
public static final long TIME_INTERVAL = 1000L;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_click);
findViewById(R.id.btn_button2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
long nowTime = System.currentTimeMillis();
if (nowTime - mLastClickTime > TIME_INTERVAL) {
// do something
mLastClickTime = nowTime;
} else {
Toast.makeText(ClickActivity.this, "不要重复点击", Toast.LENGTH_SHORT).show();
}
}
});
}
}
这种方式,每个点击事件都需要写一个时间判断,重复代码很多。
2.封装一个点击事件,处理点击间隔判断
public abstract class CustomClickListener implements View.OnClickListener{
private long mLastClickTime;
private long timeInterval = 1000L;
public CustomClickListener() {
}
public CustomClickListener(long interval) {
this.timeInterval = interval;
}
@Override
public void onClick(View v) {
long nowTime = System.currentTimeMillis();
if (nowTime - mLastClickTime > timeInterval) {
// 单次点击事件
onSingleClick();
mLastClickTime = nowTime;
} else {
// 快速点击事件
onFastClick();
}
}
protected abstract void onSingleClick();
protected abstract void onFastClick();
}
使用:
findViewById(R.id.btn_button).setOnClickListener(new CustomClickListener() {
@Override
protected void onSingleClick() {
Log.d("xxx", "onSingleClick");
}
@Override
protected void onFastClick() {
Log.d("xxx", "onFastClick");
}
});
相比于第一种方式,这种方法将重复点击的判断封装在CustomClickListener内部,外部无需处理时间判断,只需要实现点击方法即可。
3.利用RxAndroid处理重复点击
RxView.clicks(view)
.throttleFirst(1, TimeUnit.SECONDS)
.subscribe(new Consumer<Object () {
@Override
public void accept(Object o) throws Exception {
// do something
}
});
响应式地处理按钮点击,利用rxjava的操作符,来防止重复点击,相较于第1,2方案来说,此方法更为优雅一些。
4、
public class ButtonUtils {
private static long lastClickTime = 0;
private static long DIFF = 1500;
private static int lastButtonId = -1;
/**
* 判断两次点击的间隔,如果小于1000,则认为是多次无效点击
*
* @return
*/
public static boolean isFastDoubleClick() {
return isFastDoubleClick(-1, DIFF);
}
/**
* 判断两次点击的间隔,如果小于1000,则认为是多次无效点击
*
* @return
*/
public static boolean isFastDoubleClick(int buttonId) {
return isFastDoubleClick(buttonId, DIFF);
}
/**
* 判断两次点击的间隔,如果小于diff,则认为是多次无效点击
*
* @param diff
* @return
*/
public static boolean isFastDoubleClick(int buttonId, long diff) {
long time = System.currentTimeMillis();
long timeD = time - lastClickTime;
if (lastButtonId == buttonId && lastClickTime > 0 && timeD < diff) {
Log.v("isFastDoubleClick", "短时间内按钮多次触发");
return true;
}
lastClickTime = time;
lastButtonId = buttonId;
return false;
}
}
使用
if (!ButtonUtils.isFastDoubleClick(R.id.login_btn)) {//多次点击
}
参考于:https://cloud.tencent.com/developer/article/1742592