因此,如果用户输入“1234”,他们将在edittext字段中看到“1234”。但当那个区域失去焦点时,我希望它显示“***”
所以我实现了一个自定义的transformationmethod,它只在edittext字段没有焦点时屏蔽输入的文本。
当我输入文本“12345”时,它会显示它应该是“12345”,但当我单击其他字段时,数字永远不会被屏蔽。我想看“****”,但我仍然看到相同的“12345”
如果我旋转设备(强制它重新加载所有内容),它将正确显示“*****”。当我点击EditText字段时,它会正确地将屏蔽文本从“****”更改为“12345”,这样它在获得焦点时工作,但在失去焦点时不工作。我试过实现一个onfocuschangelister,但它似乎没有任何影响。
有什么方法可以在EditText字段失去焦点时强制它重新绘制文本吗?
设置:
editText.setTransformationMethod(CustomPasswordTransformationMethod(numUnobfuscatedDigits))
editText.setOnFocusChangeListener { view, hasFocus ->
((EditText)view).invalidate()
((EditText)view).refreshDrawableState()
自定义密码转换方法:
公共类customPasswordTransformationMethod扩展了PasswordTransformationMethod{
private int unobfuscated=1;
private boolean misfocused=false;
/**
* @param number the number of digits that will be unObfuscated at the end of the input string. Must be a positive integer or 0.
*/
public CustomPasswordTransformationMethod(int number) {
if (number < 0) {
Log.e(TAG, "Invalid parameter number =" + number + " number of un-obfuscated digits must be a positive integer or 0.");
unObfuscated = 0;
}
unObfuscated = number;
}
@Override
public CharSequence getTransformation(CharSequence source, View view) {
return new PasswordCharSequence(source);
}
@Override
public void onFocusChanged(View view, CharSequence sourceText,
boolean focused, int direction,
Rect previouslyFocusedRect) {
super.onFocusChanged(view,sourceText,focused, direction, previouslyFocusedRect);
mIsFocused = focused;
}
private class PasswordCharSequence implements CharSequence {
private CharSequence mSource;
public PasswordCharSequence(CharSequence source) {
mSource = source; // Store char sequence
}
public char charAt(int index) {
if(mIsFocused) return mSource.charAt(index);
else {
if (index < ((length()) - unObfuscated)) return '●';
return mSource.charAt(index);
}
}
public int length() {
return mSource.length(); // Return default
}
public CharSequence subSequence(int start, int end) {
return mSource.subSequence(start, end); // Return default
}
}
};
最佳答案
试试这个看看它是否能满足你的需要。
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if(hasFocus){
editText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}
else{
editText.setTransformationMethod(PasswordTransformationMethod.getInstance());
}
}
});
关于android - 如何在 View 失去焦点时屏蔽EditText中的文本。,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/46574752/