今天紀錄一下要怎麼調整TextView每個字與字之間的間距呢？
用TextView所提供的letterSpacing即可。
letterSpacing預設為0，最多可設定到小數點第二位，如：0.05，數值越大，間隔越大，也可以設定負數，負數的話，字與字越靠近。
可以透過XML設定或程式碼直接設定
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| <TextView | |
| android:letterSpacing="0.1" | |
| ... /> |
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| textView.letterSpacing = 1f |
