Android:edittext中的最小密码长度

    android:id="@+id/password_edittext"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textPassword"
    android:minEms="8" />

EditText passwordEditText = findViewById(R.id.password_edittext);
passwordEditText.setEms(8);

    android:id="@+id/password_edittext"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:inputType="textPassword"
    android:minEms="8"
    android:maxLength="20" />

EditText passwordEditText = findViewById(R.id.password_edittext);
passwordEditText.setFilters(new InputFilter[] {new InputFilter.LengthFilter(20)});