我一直在尝试以编程方式将edittext设置为密码字段,如下所示:
方法1:
password.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
方法2:
password.setTransformationMethod(PasswordTransformationMethod.getInstance());
方法3:
password.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
方法4:
public class MyPasswordTransformationMethod extends PasswordTransformationMethod {
@Override
public CharSequence getTransformation(CharSequence source, View view) {
return new PasswordCharSequence(source);
}
private class PasswordCharSequence implements CharSequence {
private CharSequence mSource;
public PasswordCharSequence(CharSequence source) {
mSource = source; // Store char sequence
}
public char charAt(int index) {
return '*'; // This is the important part
}
public int length() {
return mSource.length(); // Return default
}
public CharSequence subSequence(int start, int end) {
return mSource.subSequence(start, end); // Return default
}
}
};
// Call the above class using this:
text.setTransformationMethod(new MyPasswordTransformationMethod());
我创建了我的edittext,如下所示:
// Create the password edittext
EditText etPwrd = new EditText(this);
// Customise the password edittext
etPwrd.setLayoutParams(etPwrdParams);
etPwrd.setBackgroundResource(R.drawable.etlogin);
etPwrd.setTextSize(18f);
etPwrd.setLongClickable(false);
etPwrd.setPadding (5,0,0,0);
etPwrd.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
etPwrd.setTransformationMethod(new MyPasswordTransformationMethod());
etPwrd.setTypeface(officialRegularFont);
//etPwrd.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
//etPwrd.setTransformationMethod(PasswordTransformationMethod.getInstance());
etPwrd.setSingleLine();
etPwrd.setHint(R.string.password_text);
etPwrd.setCustomSelectionActionModeCallback(new ActionMode.Callback() {
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return false;
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
});
我使用上述所有方法都失败了,因为当用户输入字符时,edittext仍会显示字符。
我在XML中知道如何将edittext设置为密码字段,但我需要以编程方式进行此操作。
答案 0 :(得分:5)
您无需创建其他密码转换方法,您可以这样做。
password.setTransformationMethod(PasswordTransformationMethod.getInstance());
答案 1 :(得分:4)
在onCreate()中,在创建EditText时添加这两行
et2.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD)
et2.setTransformationMethod(new MyPasswordTransformationMethod());
然后在同样的活动中创建MyPasswordTransformationMethod
类
public class MyPasswordTransformationMethod extends PasswordTransformationMethod {
@Override
public CharSequence getTransformation(CharSequence source, View view) {
return new PasswordCharSequence(source);
}
private class PasswordCharSequence implements CharSequence {
private CharSequence mSource;
public PasswordCharSequence(CharSequence source) {
mSource = source; // Store char sequence
}
public char charAt(int index) {
return '*'; // This is the important part
}
public int length() {
return mSource.length(); // Return default
}
public CharSequence subSequence(int start, int end) {
return mSource.subSequence(start, end); // Return default
}
}
};