如何在视图失去焦点时在EditText中掩盖文本。
因此,如果用户输入“1234”,他们将在EditText字段中看到“1234”。但是当该字段丢失焦点时,我希望它显示“****”如何在视图失去焦点时在EditText中掩盖文本。
所以我实现了一个自定义TransformationMethod,它只会在EditText字段没有焦点时屏蔽输入的文本。
当我输入文本“12345”它显示它应该是“12345”,但当我点击不同的字段时,数字永远不会被屏蔽。我想看到“*****”,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),它会正确显示“*****”。当我点击EditText字段时,它将屏蔽的文本从“*****”正确地更改为“12345”。因此,它在获得焦点时起作用,但在失去焦点时不起作用。我试过实现一个OnFocusChangeListener,但它似乎没有任何影响。
有什么办法可以强制EditText字段重新绘制文本时,它失去了焦点?
设置:
editText.setTransformationMethod(CustomPasswordTransformationMethod(numUnobfuscatedDigits))
editText.setOnFocusChangeListener { view, hasFocus ->
((EditText)view).invalidate()
((EditText)view).refreshDrawableState()
CustomPasswordTransformationMethod: 公共类CustomPasswordTransformationMethod延伸PasswordTransformationMethod { 私人INT是非模糊= 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
}
}
};
试试这个,看看它做你需要什么。
editText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if(hasFocus){
editText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}
else{
editText.setTransformationMethod(PasswordTransformationMethod.getInstance());
}
}
});
也许你可以尽量保持简单:
String password = "";
editText.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if (hasFocus) {
editText.setText(password, TextView.BufferType.EDITABLE);
} else {
password = editText.getText().toString();
String ofuscated = "";
for (int i = 0; i < password.length(); i++){ ofuscated += "*"; }
editText.setText(ofuscated, TextView.BufferType.EDITABLE);
}
}
});
这是一个好主意,不幸的是我需要底层文本保持不变,因为每次编辑时都会将整个字符串保存到数据库中。使用密码TransformationMethod在作为可编辑传递给TextWatcher时将底层文本“12345”保留。 –
我知道我们应该避免“谢谢”意见,但认真谢谢你! –