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如何隱藏安卓鍵盤向下滑動?我想,如果鍵盤打開,並且用戶在屏幕上向下滑動,則鍵盤應該隱藏。我如何做到這一點?向下滑動隱藏安卓鍵盤
如何隱藏安卓鍵盤向下滑動?我想,如果鍵盤打開,並且用戶在屏幕上向下滑動,則鍵盤應該隱藏。我如何做到這一點?向下滑動隱藏安卓鍵盤
需要實現onTouchListener到您的視圖,然後向下滾動事件使鍵盤隱藏這樣
/**
* Hide Keyboard
*
* @param activity
*/
public static void hideKeyboard(Activity activity) {
// Check if no view has focus:
try {
View view = activity.getCurrentFocus();
if (view != null) {
InputMethodManager inputManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
}catch (Exception e){
}
}
OnSwipeTouchListener.java:
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector;
public OnSwipeTouchListener (Context ctx){
gestureDetector = new GestureDetector(ctx, new GestureListener());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
result = true;
}
else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
result = true;
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {
}
public void onSwipeLeft() {
}
public void onSwipeTop() {
}
public void onSwipeBottom() {
}
}
用法:
imageView.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) {
public void onSwipeTop() {
Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();
}
public void onSwipeLeft() {
Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
}
public void onSwipeBottom() {
Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
}
});
您可以使用SimpleOnGestureListener()
並覆蓋它的onFling()
方法來檢測滑動。對於向下滑動,您將Y的MotionEvent
的增量與靈敏度進行比較。
public static void hideKeyboard(Activity activity) {
// Check if no view has focus:
try {
View view = activity.getCurrentFocus();
if (view != null) {
InputMethodManager inputManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
}
}catch (Exception e){
}
}
SimpleOnGestureListener simpleOnGestureListener = new SimpleOnGestureListener() {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
float sensitivity = 50; //suit yourself
// TODO Auto-generated method stub
if((e2.getY() - e1.getY()) > sensitivity){
//swiped down, now do whatever you want.
hideKeyboard();
}
}
}
如何從上到下得到滑動事件,我將從哪裏調用HideKeyboard方法?我嘗試過使用OnTouchEvent,但它不起作用 – anand
@anand我編輯了我的答案,請檢查並讓我知道 –
感謝您的回答。現在它的工作。在Xamarin中,我們有DispatchTouchEvent,我們稱之爲獲取觸摸事件。當用戶滑動時,現在鍵盤關閉。 – anand