android之密码输入框更改默认黑点图标为星号图标
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2019-05-23
11:50:55
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//
更改密码输入字符为星号
private class MyPasswordTransformationMethod extends
PasswordTransformationMethod {
@Override
public CharSequence getTransformation(CharSequence source, View view){
return new PasswordCharSequence(source);
}
private class PasswordCharSequence implements CharSequence {
private CharSequence mSource;
private PasswordCharSequence(CharSequence mSource) {
this.mSource = mSource;
}
@Override
public int length() {
return mSource.length();
}
@Override
public char charAt(int i) {
return '*';
}
@Override
public CharSequence subSequence(int start, int end) {
return mSource.subSequence(start, end);
}
}
}
TextView textView = new TextView(mContext);
//设置为密码输入模式
textView.setInputType(InputType.TYPE_NUMBER_VARIATION_PASSWORD |
InputType.TYPE_CLASS_NUMBER);
//将默认的密码字符（圆点.）更改为星号（*）
textView.setTransformationMethod(new
MyPasswordTransformationMethod());
//设置文本框的最长字符个数
textView.setFilters(new InputFilter[]{new InputFilter.LengthFilter(6)});
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