实现TextView内容分块处理

来源：互联网发布：linux内核内存管理浅析编辑：程序博客网时间：2024/06/14 21:34

实现效果图：

这里实现主要是用HorizontalScrollView加TextView实现的，实现布局代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.example.a550211.testactivity.MainActivity">    <Button        android:id="@+id/btn_add"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="添加" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="sdcard>" />            <HorizontalScrollView                android:id="@+id/scrollView"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:scrollbars="none">                <TextView                    android:id="@+id/tv_path"                    android:layout_width="fill_parent"                    android:layout_height="wrap_content"                    />            </HorizontalScrollView>    </LinearLayout></LinearLayout>

2、实现HorizontalScrollView初始跳转到最右边

 scrollView.post(new Runnable() {            public void run() {                scrollView.fullScroll(View.FOCUS_RIGHT);            }        });

3、完整实现代码

package com.example.a550211.testactivity;import android.app.Activity;import android.graphics.Color;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.text.Editable;import android.text.Spannable;import android.text.SpannableString;import android.text.SpannableStringBuilder;import android.text.Spanned;import android.text.TextPaint;import android.text.TextUtils;import android.text.TextWatcher;import android.text.method.LinkMovementMethod;import android.text.method.ScrollingMovementMethod;import android.text.style.CharacterStyle;import android.text.style.ClickableSpan;import android.text.style.ImageSpan;import android.util.Log;import android.view.Menu;import android.view.MenuInflater;import android.view.MenuItem;import android.view.View;import android.view.Window;import android.widget.Button;import android.widget.HorizontalScrollView;import android.widget.TextView;import android.widget.Toast;import java.util.ArrayList;import java.util.StringTokenizer;public class MainActivity extends Activity {    private TextView tv_path;    private HorizontalScrollView scrollView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        initView();        initData();    }    private void initData() {//        String[] spPath = mCurrentPath.split(Type.ALL_PATH);//        StringTokenizer tokenizer = new StringTokenizer(spPath[1],"/");//        while (tokenizer.hasMoreTokens()){//            sbBuilder.append(tokenizer.nextToken() + " > ");//        }        StringBuilder sbBuilder = new StringBuilder();        for (int i = 0; i < 10; i++) {            sbBuilder.append("username" + i + ">");        }        String likeUsers = sbBuilder.substring(0, sbBuilder.lastIndexOf(">")).toString();        tv_path.setMovementMethod(LinkMovementMethod.getInstance());        tv_path.setText(addClickablePart(likeUsers), TextView.BufferType.SPANNABLE);    }    private SpannableStringBuilder addClickablePart(String str) {        SpannableString spanStr = new SpannableString("");        SpannableStringBuilder ssb = new SpannableStringBuilder(spanStr);        ssb.append(str) ;        String[] likeUsers = str.split(">");        if (likeUsers.length > 0) {            // 最后一个            for (int i = 0; i < likeUsers.length; i++) {                final String name = likeUsers[i];                final int start = str.indexOf(name) + spanStr.length();                ssb.setSpan(new ClickableSpan() {                    @Override                    public void onClick(View widget) {                        Toast.makeText(getApplication(), name, Toast.LENGTH_SHORT).show();                    }                    @Override                    public void updateDrawState(TextPaint ds) {                        super.updateDrawState(ds);                         ds.setColor(Color.BLACK); // 设置文本颜色                        // 去掉下划线                        ds.setUnderlineText(false);                    }                    @Override                    public CharacterStyle getUnderlying() {                        return super.getUnderlying();                    }                }, start, start + name.length(), 0);            }        }        return ssb.append("");    }    private void initView() {        tv_path = (TextView)findViewById(R.id.tv_path);        scrollView = (HorizontalScrollView)findViewById(R.id.scrollView);        scrollView.post(new Runnable() {            public void run() {                scrollView.fullScroll(View.FOCUS_RIGHT);            }        });    }}

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