Android系统。 TextInputLayout。切换密码可见性事件监听器？

Question

TextInputLayout中有一个用于InputType textPassword的密码可见性切换按钮。

以某种方式可以捕捉到切换事件吗？

我找不到任何公开的方法

Answer 1

我查看了TextInputLayout的源代码，以找到切换按钮的视图类型。它的CheckableImageButton。其他一切都很简单。您需要找到迭代迭代迭代TextInputLayout视图的子项的视图。然后将setOnTouchListener作为@MikeM在评论中提出。

View togglePasswordButton = findTogglePasswordButton(mTextInputLayoutView);
if (togglePasswordButton != null) {
    togglePasswordButton.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            // implementation
            return false;
        }
    });
}

private View findTogglePasswordButton(ViewGroup viewGroup) {
    int childCount = viewGroup.getChildCount();
    for (int ind = 0; ind < childCount; ind++) {
        View child = viewGroup.getChildAt(ind);
        if (child instanceof ViewGroup) {
            View togglePasswordButton = findTogglePasswordButton((ViewGroup) child);
            if (togglePasswordButton != null) {
                return togglePasswordButton;
            }
        } else if (child instanceof CheckableImageButton) {
            return child;
        }
    }
    return null;
}

findTogglePasswordButton的替代实施

private View findTogglePasswordButton() {
    return findViewById(R.id.text_input_password_toggle);
}

@MikeM。谢谢你的身份

Answer 2

您可以使用此：

import android.annotation.SuppressLint;
import android.content.Context;
import android.support.design.widget.CheckableImageButton;
import android.support.design.widget.TextInputLayout;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

import com.ctm.core.ui.R;

import org.jetbrains.annotations.NotNull;

/**
 * Extended {@link TextInputLayout} allowing setting a listener when the user toggles the visibility
 * of the password.
 */
public class TextInputLayoutEx extends TextInputLayout {

    public TextInputLayoutEx(Context context) {
        super(context);
    }

    public TextInputLayoutEx(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TextInputLayoutEx(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public void setOnToggleShowPasswordListener(OnToggleShowPasswordListener listener) {
        if (listener != null) {
            initTogglePasswordShownListener(listener);
        }
    }

    @SuppressLint({"RestrictedApi"})
    private void initTogglePasswordShownListener(@NotNull OnToggleShowPasswordListener listener) {
        final View revealPasswordView = this.findViewById(R.id.text_input_password_toggle);
        if (revealPasswordView == null) {
            return;
        }
        if (!(revealPasswordView instanceof CheckableImageButton)) {
            return;
        }

        final CheckableImageButton revealPasswordCheckableImageButton = (CheckableImageButton) revealPasswordView;
        revealPasswordView.setOnTouchListener((view, motionEvent) -> {
            if (MotionEvent.ACTION_UP == motionEvent.getAction()) {
                listener.onToggleShowPasswordClicked(!revealPasswordCheckableImageButton.isChecked());
                return view.performClick();
            }
            return false;
        });
    }

    public interface OnToggleShowPasswordListener {
        void onToggleShowPasswordClicked(boolean isShown);
    }
}

在客户端代码中：

TextInputLayoutEx layoutPassword = (TextInputLayoutEx) findByById(...)
layoutPassword.setPasswordVisibilityToggleEnabled(true);
        layoutPassword.setOnToggleShowPasswordListener(isShown -> Toast.makeText(SignInActivity.this, "Password shown: " + isShown, Toast.LENGTH_SHORT).show());

Answer 3

使用 Layout Inspector 分析了视图层次结构后，我可以看到以下内容：

因此您可以执行以下操作：

val toggle = password.findViewById<CheckableImageButton?>(R.id.text_input_password_toggle)
toggle?.setOnClickListener {
    println("clicked on toggle")
}

或手动：

// Assuming you have AndroidKTX
val views = password.children
for (v in views) {
    if (v is FrameLayout) {
        val innerViews = v.children
        for (iv in innerViews) {
            if (iv is CheckableImageButton) {
                iv.setOnClickListener { 
                    println("clicked on toggle")
                }
            }
        }
    }
}

Answer 4

我在这里使用绑定。

这是布局的ID-regPasswordlayout 密码切换的默认ID-text_input_password_toggle

binding.regPasswordlayout.findViewById(R.id.text_input_password_toggle)
.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
              // your code goes here
         }
     });

Answer 5

自Material Components v1.1.0（科特琳）以来，您可以执行以下操作：

textInputLayout.setEndIconOnClickListener {
    // do something here
}