反映在TextView的文字？ [英] Mirrored text in textview?

问题描述

我试着这样做，只是输出一串文字到Android的屏幕，这个问题是一个应用程序，它已被镜像（将被视为一个HUD）。

Im trying to do an application that simply outputs a bunch of text to the android screen, the problem is is that it has to be mirrored (Will be viewed as a "hud").

令人惊讶的是Android 4.0的，你可以通过简单地textview.setScaleX这样与一个TextView（-1）... 4.0之前的我找不到了。 textview.setTextScaleX（-1）不工作（实际上它还挺工作，但只有一个字符出现，虽然它镜像）。 4.0方法也适用于我的手机（Nexus S的运行CM9）。

Surprisingly, in android 4.0, you can do this with a textview by simply going textview.setScaleX(-1)... prior to 4.0 I cant find much. textview.setTextScaleX(-1) doesnt work (actually it kinda works, but only one char comes up, though it is mirrored). The 4.0 approach also works on my phone (nexus s running cm9).

我已经跨越了一些建议迷迷糊糊的，如使用AndroidCharacter.Mirror（），但没有成功，似乎IM留下了3个选项：

I've stumbled across a few suggestions, such as using AndroidCharacter.Mirror() with no success and it seems im left with 3 options:

1）写一个自定义（镜像）字体 2）学会了如何覆盖的OnDraw（按的Andr​​oid TextView的镜像（HUD）？） 3）油漆这一切到画布上。

1) Write a custom (mirrored) font 2) learn how to override onDraw (as per Android TextView mirroring (hud)?) 3) paint it all onto a canvas.

首先是合理的，我可以大概做了，但我限制在一个单一的语言（或大量的工作）。二+三林相当具有虽然林pretty的肯定，我可以计算出从几个例子我已经找到了（此例如丢失：的>图纸镜文本）。

The first is plausible and i could probably do it, but it limits me to a single language (or a lot of work). The second + third Im quite lost with though Im pretty sure I can figure it out from a few examples i've found (this for example: Drawing mirror text on canvas).

在我尝试2或3，有没有其他的选择，我也许已经不考虑？

Before I do attempt 2 or 3, is there any other options i've perhaps not considered?

推荐答案

林pretty的肯定是不可能的pre-4.0的TextView。

Im pretty sure it is not possible with the pre-4.0 TextView.

镜像定制的TextView并不难：

A mirrored custom TextView is not that hard:

package your.pkg;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.widget.TextView;

public class MirroredTextView extends TextView {

    public MirroredTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        canvas.translate(getWidth(), 0);
        canvas.scale(-1, 1);
        super.onDraw(canvas);
    }

}

和为使用：

<your.pkg.MirroredTextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World" />

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