字符串太长的 TextView

Question

我有这个layout

<ScrollView>
    <TextView android:id="@+id/textView" />
</ScrollView>

当我尝试设置过长的文本时，Textview 不会显示。

//OnCreate
//...
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("..."); //Here is a text with more than 2500
                        //chars and at least have 10 \n char
                        //(it means has at least 10 paragraph)

如何显示该文本？

编辑一个：

即使我将background 设置为TextView 并且TextView 也不会显示该背景

Answer 1

你可以设置

android:maxLines="1"
android:ellipsize="end"

到你的文本视图，所以比你的文本视图长的文本将被隐藏。

Answer 2

由于android:singleLine="true" 属性已被弃用，请为您的TextView 设置以下属性：

android:ellipsize="end"
android:maxLines="1"

然后，TextView 将仅显示适合您的 TextView 的文本，后跟省略号 ...

Answer 3

我不知道这是否会对你有所帮助，但在 developer.android 上看到了这个...

在 Android 8.0（API 级别 26）及更高版本中，您可以指示 TextView 让文本大小自动扩展或收缩，以根据 TextView 的特征和边界填充其布局。此设置可以更轻松地优化具有动态内容的不同屏幕上的文本大小。

android:autoSizeTextType="uniform"

您可以通过三种方式设置 TextView 的自动调整大小：

Default

Granularity

Preset Sizes

================================================ ==

readMore

Answer 4

使用这个：

  EditText thumbnailView = (EditText) findViewById(R.id.enterBearingNo_editText_id);
    TextView messageView = (TextView) findViewById(R.id.string2);
    String text = "LargeText";

    Display display = getWindowManager().getDefaultDisplay();
    FlowTextHelper.tryFlowText(text, thumbnailView, messageView, display);

FlowTextHelper.class

class FlowTextHelper {

    static boolean mNewClassAvailable;

    static {
        if (Integer.valueOf(Build.VERSION.SDK) >= 8) { // Froyo 2.2, API level 8
            mNewClassAvailable = true;
        }

        // Also you can use this trick if you don't know the exact version:
        /*
         * try {
         * Class.forName("android.text.style.LeadingMarginSpan$LeadingMarginSpan2"
         * ); mNewClassAvailable = true; } catch (Exception ex) {
         * mNewClassAvailable = false; }
         */
    }

    public static void tryFlowText(String text, View thumbnailView,
            TextView messageView, Display display) {
        // There is nothing I can do for older versions, so just return
        if (!mNewClassAvailable)
            return;

        // Get height and width of the image and height of the text line
        thumbnailView.measure(display.getWidth(), display.getHeight());
        int height = thumbnailView.getMeasuredHeight();
        int width = thumbnailView.getMeasuredWidth();
        float textLineHeight = messageView.getPaint().getTextSize();

        // Set the span according to the number of lines and width of the image
        int lines = (int) Math.round(height / textLineHeight);
        // For an html text you can use this line: SpannableStringBuilder ss =
        // (SpannableStringBuilder)Html.fromHtml(text);
        SpannableString ss = new SpannableString(text);
        ss.setSpan(new MyLeadingMarginSpan2(lines, width), 0, ss.length(),
                Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        messageView.setText(ss);

        // Align the text with the image by removing the rule that the text is
        // to the right of the image
        RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) messageView
                .getLayoutParams();
        int[] rules = params.getRules();
        rules[RelativeLayout.RIGHT_OF] = 0;
    }

    public static void tryFlowTextPrice(String text, TextView messageView,
            Display display) {
        // There is nothing I can do for older versions, so just return
        if (!mNewClassAvailable)
            return;

        // Get height and width of the image and height of the text line
        // thumbnailView.measure(display.getWidth(), display.getHeight());
        // int height = thumbnailView.getMeasuredHeight();
        // int width = thumbnailView.getMeasuredWidth();
        float textLineHeight = messageView.getPaint().getTextSize();

        // Set the span according to the number of lines and width of the image
        // int lines = (int) Math.round(height / textLineHeight);
        // For an html text you can use this line: SpannableStringBuilder ss =
        // (SpannableStringBuilder)Html.fromHtml(text);
        SpannableString ss = new SpannableString(text);
        // ss.setSpan(new MyLeadingMarginSpan2(lines, width), 0, ss.length(),
        // Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        messageView.setText(ss);

        // Align the text with the image by removing the rule that the text is
        // to the right of the image
        // LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)
        // messageView
        // .getLayoutParams();
        // int[] rules = params.getRules();
        // rules[RelativeLayout.RIGHT_OF] = 0;
    }

}