Android使用者介面 UI組件–TextView及其子類(三) EditView

EditView和TextView的用法差不多，只是文字可編輯

小技巧：

設定EditText隱藏鍵盤 
(EditText)mMarket.setInputType(0);  

設定EditText不被IME遮蓋 
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);

提示錯誤框(用於驗證必填等):

setError();

如果要對常值內容在代碼中加各種效果使用SpannableString

Android系統通過SpannableString類來對指定文本進行相關處理，具體有以下功能：

1、BackgroundColorSpan 背景色 

SpannableString spanText = new SpannableString("背景文字");spanText.setSpan(new BackgroundColorSpan(Color.GREEN), 0, spanText.length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

2、ClickableSpan 文本可點擊，有點擊事件

TextView tv = findViewById(R.id.tv_click);SpannableString spStr = new SpannableString("點擊的文字");ClickSpan clickSpan = new NoLineClickSpan(vo); //設定超連結spStr.setSpan(clickSpan, 0, str.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);tv.append(spStr);tv.setMovementMethod(LinkMovementMethod.getInstance());//設定超連結為可點擊狀態tv.setMovementMethod(LinkMovementMethod.getInstance());

3、ForegroundColorSpan 文本顏色（前景色彩）

spanText = new SpannableString("顏色文字");spanText.setSpan(new ForegroundColorSpan(Color.BLUE), 6, spanText.length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

4、MaskFilterSpan 修飾效果，如模糊(BlurMaskFilter)、浮雕(EmbossMaskFilter)

spanText = new SpannableString("MaskFilterSpan ");int length = spanText.length();//模糊(BlurMaskFilter)MaskFilterSpan maskFilterSpan = new MaskFilterSpan(new BlurMaskFilter(3, Blur.OUTER));spanText.setSpan(maskFilterSpan, 0, length - 10, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);//浮雕(EmbossMaskFilter)maskFilterSpan = new MaskFilterSpan(new EmbossMaskFilter(new float[]{1,1,3}, 1.5f, 8, 3));spanText.setSpan(maskFilterSpan, length - 10, length, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

5、MetricAffectingSpan 父類，一般不用

6、RasterizerSpan 光柵效果

spanText = new SpannableString("StrikethroughSpan");spanText.setSpan(new StrikethroughSpan(), 0, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

7、StrikethroughSpan 刪除線（中劃線）

spanText = new SpannableString("StrikethroughSpan");spanText.setSpan(new StrikethroughSpan(), 0, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

8、SuggestionSpan 相當於預留位置一般用在EditText輸入框中。當雙擊此文本時，會彈出提示框選擇一些建議（推薦的）文字，選中的文本將替換此預留位置。在IME上用的較多。

9、UnderlineSpan 底線

spanText = new SpannableString("UnderlineSpan");spanText.setSpan(new UnderlineSpan(), 0, spanText.length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

10、AbsoluteSizeSpan 絕對大小（文本字型）

spanText = new SpannableString("AbsoluteSizeSpan");spanText.setSpan(new AbsoluteSizeSpan(20, true), 0, spanText.length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

11、DynamicDrawableSpan 設定圖片，基於文本基準或底部對齊。

DynamicDrawableSpan drawableSpan = new DynamicDrawableSpan(DynamicDrawableSpan.ALIGN_BASELINE) {    @Override    public Drawable getDrawable() {        Drawable d = getResources().getDrawable(R.drawable.ic_launcher);        d.setBounds(0, 0, 50, 50);        return d;    }};DynamicDrawableSpan drawableSpan2 = new DynamicDrawableSpan(DynamicDrawableSpan.ALIGN_BOTTOM) {    @Override    public Drawable getDrawable() {          Drawable d = getResources().getDrawable(R.drawable.ic_launcher);          d.setBounds(0, 0, 50, 50);                return d;            }        };spanText.setSpan(drawableSpan, 3, 4, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);spanText.setSpan(drawableSpan2, 7, 8, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

12、ImageSpan 圖片

spanText = new SpannableString("ImageSpan");Drawable d = getResources().getDrawable(R.drawable.ic_launcher);</strong>d.setBounds(0, 0, 50, 50);spanText.setSpan(new ImageSpan(d), 3, 4, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

13、RelativeSizeSpan 相對大小（文本字型）

spanText = new SpannableString("RelativeSizeSpan");//參數proportion:比例大小spanText.setSpan(new RelativeSizeSpan(2.5f), 3, 4,Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

14、ReplacementSpan 父類，一般不用

15、ScaleXSpan 基於x軸縮放

spanText = new SpannableString("hello");//參數proportion:比例大小spanText.setSpan(new ScaleXSpan(3.8f), 3, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

16、StyleSpan 字型樣式：粗體、斜體等

spanText = new SpannableString("StyleSpan ");//Typeface.BOLD_ITALIC:粗體+斜體spanText.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 3, 7,Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

17、SubscriptSpan 下標（數學公式會用到）

spanText = new SpannableString("SubscriptSpan ");spanText.setSpan(new SubscriptSpan(), 6, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

18、SuperscriptSpan 上標（數學公式會用到）

spanText = new SpannableString("SuperscriptSpan ");spanText.setSpan(new SuperscriptSpan(), 6, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

19、TextAppearanceSpan 文本外貌（包括字型、大小、樣式和顏色）

spanText = new SpannableString("TextAppearanceSpan");//若需自訂TextAppearance，可以在系統樣式上進行修改spanText.setSpan(new TextAppearanceSpan(this, android.R.style.TextAppearance_Medium), 6, 7, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

20、TypefaceSpan 文本字型

spanText = new SpannableString("TypefaceSpan ");//若需使用自訂字型，可能要重寫類TypefaceSpanspanText.setSpan(new TypefaceSpan("monospace"), 3, 10,Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);

21、URLSpan 文本超連結

spanText = new SpannableString("URLSpan ");spanText.setSpan(new URLSpan("http://orgcent.com"), 10, spanText.length(),Spannable.SPAN_INCLUSIVE_EXCLUSIVE);mTVText.append("\n");mTVText.append(spanText);//讓URLSpan可以點擊mTVText.setMovementMethod(new LinkMovementMethod());