java - How to select a particular line in dynamic content in android

Question

I need to select a particular line within dynamic content from database. In every row of a table, few lines start with <#c>. I want to select and center the line which starts with <#c>. I am using SpannableString. I am able to remove <#c> but all texts become centered.

My problem is I am unable to select the paricular line. In the

setSpan (Object what, int start, int end, int flags)

How will I write start and end characters?

My problem is with

int start and  int end

How will I use spannableString.length() for int start and int end.

Below is like the content.

 |<#c>aaaaaaa    |
 |bbbbbbbbbb     |
 |<#c>dddddddd   |
 |cccccccccc     |
 |jjjjjjjjjj     |
 |<#c>ffffffff   |
 |rrrrrrrrr      |
 |ggggggggggg    |

I am trying below;

    TextView textView1 = ((TextView) rootView.findViewById(R.id.text2));
    String text1 = args.getString(ARG_OBJECT2);

    SpannableString spannableString;
    Object standard;
    if (text1.contains("<#c>")) {
        spannableString = new SpannableString(text1.replaceAll("<#c>", ""));
        standard = new AlignmentSpan.Standard(Layout.Alignment.ALIGN_CENTER);
        spannableString.setSpan(standard, 0, spannableString.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        textView1.setText(spannableString);

    }

I checked with the following:

System.out.println("spannableString.length : " + spannableString.length());

Result was :

I/System.out: spannableString.length : 1763
I/System.out: spannableString.length : 537
I/System.out: spannableString.length : 931

spannableString.length() is taking all the characters in the content not taking only the particular lines where <#c> contains.

How to get the length of that particular line which contains <#c>?

xml file

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/lib/com.google.ads"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/ScrlView"
        android:fillViewport="true"
        android:clickable="true"
        android:focusable="true"
        android:scrollbars="vertical">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/ll"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:width = "0dp"
                android:id="@+id/text2"
                android:textSize="20sp"
                android:textStyle="bold"
                android:textColor="@color/blue"
                android:layout_marginLeft="10dp"
                android:layout_marginRight="10dp"
                android:layout_marginTop="2dp"
                android:layout_marginBottom="5dp"/>

        </LinearLayout>

    </ScrollView>

</RelativeLayout>

With the above code All the dynamic contents in the row of the table are becoming "centered". I need to center that particular lines which start with <#c>.

标签： javaandroidstylesspannablestringspannable

Answer 1

你可以试试这个。

如果您的字符串以 <#c> 开头，那么 if 部分将执行 else 字符串将在 else 部分中按原样显示

TextView textView1 = ((TextView) rootView.findViewById(R.id.text2));
String text1 = args.getString(ARG_OBJECT2);

SpannableString spannableString;
Object standard;
if (text1.startsWith("<#c>")) {
  spannableString = new SpannableString(text1.replaceAll("<#c>", ""));
  standard = new AlignmentSpan.Standard(Layout.Alignment.ALIGN_CENTER);
  spannableString.setSpan(standard, 0, spannableString.length(), 
  Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
  textView1.setText(spannableString);
}else{
   textView1.setText(text1);
}