我在Android消息传递应用程序中有一个textview,我收到了我的android手机的消息,并在textviews中显示了它们,如果文本是波斯语,我想将layout_gravity设置为正确,那么如何检测从uri以下获得的文本语言？

Uri uri = Uri.parse("content://sms/");

解决方法:

有Bidi个班级.此类具有getBaseLevel()方法,如果您的文本从左到右,则返回0,否则返回1(如果从右到左).

例：

@Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        Bidi bidi = new Bidi(userList.get(position).getName(), Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
        if(bidi.getBaseLevel() == 0)
            convertView = myInflater.inflate(R.layout.list_add_friends_row, null);
        else
            convertView = myInflater.inflate(R.layout.list_add_friends_row_mirror, null);

还有另一种方法baseIsLeftToRight(),可能最好在if语句中使用.结果与上述相同.

Bidi bidi = new Bidi(userList.get(position).getName(), Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT);
if(bidi.baseIsLeftToRight())
                convertView = myInflater.inflate(R.layout.list_add_friends_row, null);
            else
                convertView = myInflater.inflate(R.layout.list_add_friends_row_mirror, null);

SRC：https://*.com/a/18008575/797495

public final class Bidi
extends Object

This class implements the Unicode Bidirectional Algorithm.

A Bidi object provides information on the bidirectional reordering of
the text used to create it. This is required, for example, to properly
display Arabic or Hebrew text. These languages are inherently mixed
directional, as they order numbers from left-to-right while ordering
most other text from right-to-left.

Once created, a Bidi object can be queried to see if the text it
represents is all left-to-right or all right-to-left. Such objects are
very lightweight and this text is relatively easy to process.

If there are multiple runs of text, information about the runs can be
accessed by indexing to get the start, limit, and level of a run. The
level represents both the direction and the ‘nesting level’ of a
directional run. Odd levels are right-to-left, while even levels are
left-to-right. So for example level 0 represents left-to-right text,
while level 1 represents right-to-left text, and level 2 represents
left-to-right text embedded in a right-to-left run.