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UI控件之显示文本控件TextView(下)

时间:2016-06-19 06:48:16      阅读:295      评论:0      收藏:0      [点我收藏+]

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(一)带阴影的TextView
涉及到的几个属性:
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运行效果如下:
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实现代码:

 <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="194dp"
        android:text="带阴影的TextView" 
        android:shadowColor="#0CCAFF"
        android:shadowRadius="3.0"
        android:shadowDx="10.0"
        android:shadowDy="10.0"
        android:textSize="30sp"
        android:textColor="#CB0FFF"/>

(二)带边框的TextView:
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简单说下shapeDrawable资源文件的几个节点及其属性:
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运行效果:
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实现代码:
1)编写矩形边框的Drawable

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <!-- 设置一个粗细为2px的黑色边框 -->
    <stroke
        android:width="2px"
        android:color="#000000" />
    <!-- 设置渐变色 -->
    <gradient
        android:angle="270"
        android:endColor="#C0F0B0"
        android:startColor="#FCD209" />
    <!-- 设置一下边距 -->
    <padding
        android:bottom="5dp"
        android:left="5dp"
        android:right="5dp"
        android:top="5dp" />
</shape>

2)编写圆角边框的Drawable

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <!-- 设置透明背景色 -->
    <solid android:color="#52CEEB" />

    <!-- 设置一个粗细为2px的黑色边框 -->
    <stroke
        android:width="2px"
        android:color="#000000" />
    <!-- 设置4个圆角的半径 -->
    <corners
        android:bottomLeftRadius="10px"
        android:bottomRightRadius="10px"
        android:topLeftRadius="10px"
        android:topRightRadius="10px" />
    <!-- 设置一下边框 -->
    <padding
        android:bottom="5dp"
        android:left="5dp"
        android:right="5dp"
        android:top="5dp" />

</shape>

3)将TextView的backGround属性设置为这俩个Drawable

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.android_textview2.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:textSize="20sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="129dp"
        android:background="@drawable/tv_rectborder"
        android:text="矩形边框的TextView" />

    <TextView
        android:id="@+id/textView2"
        android:textSize="20sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="97dp"
        android:background="@drawable/tv_radiusborder"
        android:text="圆角边框的TextView" />

</RelativeLayout>

(三)带图片(drawableXxx)的TextView:
在实际的开发中,我们可能会遇到这种需求:
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实现思路:
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运行结果:

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o(╯□╰)o,抠图狗也是尽力了~~~~原理就是那么回事儿
实现代码:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:drawablePadding="10dp"
        android:drawableTop="@drawable/show1"
        android:gravity="center"
        android:text="微信" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignTop="@+id/textView2"
        android:layout_marginLeft="50dp"
        android:drawablePadding="10dp"
        android:drawableTop="@drawable/show4"
        android:gravity="center"
        android:text=" 我    " />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_toLeftOf="@+id/textView4"
        android:drawablePadding="10dp"
        android:drawableTop="@drawable/show2"
        android:gravity="center"
        android:text="通讯录" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginRight="30dp"
        android:layout_toLeftOf="@+id/textView2"
        android:drawablePadding="10dp"
        android:drawableTop="@drawable/show3"
        android:gravity="center"
        android:text="发现" />

</RelativeLayout>

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代码如下:

package com.example.android_textview2;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.TextView;


public class MainActivity extends Activity {

    private TextView textView5;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.we_chat);
        //获取到“微信”的ID
        textView5 = (TextView) findViewById(R.id.textView5);
        Drawable[] drawables = textView5.getCompoundDrawables();
        //数组下标0~3,依次是:左上右下
        drawables[1].setBounds(100, 0, 200, 200);
        textView5.setCompoundDrawables(drawables[0], drawables[1], drawables[2], drawables[3]);


    }
}

运行效果如下:
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代码分析:
1)Drawable[] drawables = textView5.getCompoundDrawables();
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2)drawables[1].setBounds(100, 0, 200, 200);
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3) textView5.setCompoundDrawables(drawables[0], drawables[1], drawables[2], drawables[3]);
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(四)SpannableString&SpannableStringBuilder定制文本
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运行效果:
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实现代码:

package com.example.android_textview2;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.ImageSpan;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.URLSpan;
import android.text.style.UnderlineSpan;
import android.view.ViewDebug.FlagToString;
import android.widget.TextView;


public class MainActivity2 extends Activity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.spanable_string_test);

        TextView tv1 = (TextView) findViewById(R.id.tv1);
        TextView tv2 = (TextView) findViewById(R.id.tv2);
        SpannableString span = new SpannableString("红色打电话斜体删除线绿色下划线图片:.");
        //1.设置背景色,setSpan时需要指定的
        //flag,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE(前后都不包括)
       span.setSpan(new BackgroundColorSpan(Color.YELLOW),
               0 , 2 ,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       //2.使用链接标记文本
       span.setSpan(new URLSpan("tel:12366585225"), 
               2, 5, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       //3.用样式标记文本(斜体)
       span.setSpan(new StyleSpan(Typeface.BOLD_ITALIC),
               5, 7, Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
       //4.用删除线标记文本
       span.setSpan(new StrikethroughSpan(), 
               7, 10, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       //5.使用下划线标记文本
       span.setSpan(new UnderlineSpan(), 
               10, 16, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       //6.使用颜色标记文本
       span.setSpan(new ForegroundColorSpan(Color.GREEN),
               0 , 2 ,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
       //7.获取Drawable资源
       Drawable drawable = getResources().getDrawable(R.drawable.ic_launcher);
       drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());

       //8.创建ImageSpan,然后使用ImageSpan来替换文本
       ImageSpan imageSpan = new ImageSpan(drawable, ImageSpan.ALIGN_BASELINE);
       span.setSpan(imageSpan, 
               18, 19, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
                tv1.setText(span);

    }
}

(五)实现部分可点击的TextViwe,即点击链接弹出Activity的效果;
相信这个大家很熟悉吧~~~
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下面我们来简单地实现下这个效果:

package com.example.android_textview2;



import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.SpannedString;
import android.text.TextPaint;
import android.text.style.ClickableSpan;
import android.text.style.ImageSpan;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity3 extends Activity {

    private TextView textView3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity2);
        //获取到“微信”的ID
        TextView  tv3 = (TextView) findViewById(R.id.tv3);
        StringBuilder sBuilder = new StringBuilder();
        for (int i = 0; i < 20; i++) {
            sBuilder.append("好友" + i+", ");
        }

        String  likeUsers = sBuilder.substring(0,
                sBuilder.lastIndexOf(", ")).toString();
        //tv3.setText(addClickPart(likeUsers), TextView.BufferType.SPANNABLE);
        tv3.setText(addClickPart(likeUsers), TextView.BufferType.SPANNABLE);
    }

    //定义一个点击每个部分文字的处理方法
    private SpannableStringBuilder addClickPart(String str) {
        //赞的图标
        ImageSpan imageSpan = new ImageSpan(MainActivity3.this, R.drawable.mren);
        SpannableString spanStr = new SpannableString("p.");
        spanStr.setSpan(imageSpan, 
                0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        //创建一个SpannableStringBuilder对象,连接多个字符串
        SpannableStringBuilder ssBuilder = new SpannableStringBuilder(spanStr);
        ssBuilder.append(str);
        String[] likeUsers=str.split(", ");
        if (likeUsers.length > 0) {
            for (int i = 0; i < likeUsers.length; i++) {
                final String name =likeUsers[i];
                int start = str.indexOf(name) + spanStr.length();
                ssBuilder.setSpan(new ClickableSpan() {

                    @Override
                    public void onClick(View widget) {
                        // TODO Auto-generated method stub
                        Toast.makeText(MainActivity3.this, name, Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void updateDrawState(TextPaint ds) {
                        // TODO Auto-generated method stub
                        super.updateDrawState(ds);
                        //删除下划线,设置字体颜色为蓝色
                        ds.setColor(Color.RED);
                        ds.setUnderlineText(false);
                    }

                }, start, start+name.length(), 0);
            }
        }


        return ssBuilder.append("等" + likeUsers.length+"个人觉得很赞");
    }
}

运行效果:
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(六)实现TextView跑马灯效果:
运行效果:
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实现代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/PMDTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="#FFFFFF"
        android:ellipsize="marquee"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:marqueeRepeatLimit="marquee_forever"
        android:padding="10dp"
        android:singleLine="true"
        android:textColor="#000"
        android:textSize="20dp" >
    </TextView>

</LinearLayout>

java代码:

package com.example.android_textview;

import android.app.Activity;
import android.os.Bundle;
import android.text.Html;
import android.text.method.LinkMovementMethod;
import android.widget.TextView;

public class TextViewTest_3 extends Activity {

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onCreate(savedInstanceState);
            setContentView(R.layout.text_view_test_3);
            TextView PMDTextView = (android.widget.TextView) findViewById(R.id.PMDTextView);
            String html = "中新网10月10日电 据外电报道,美国科学家罗伯特J。<a href=‘http://www.baidu.com‘>勒夫科维兹</a>(Robert J. Lefkowitz)与布莱恩·K·卡比尔卡(Brian K. Kobilka)因在G蛋白偶联受体方面的研究获得2012年诺贝尔化学奖。";
            CharSequence charSequence = Html.fromHtml(html);
            PMDTextView.setText(charSequence);
            PMDTextView.setMovementMethod(LinkMovementMethod.getInstance());
        }
}

(七)设置TextView的字间距跟行间距
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UI控件之显示文本控件TextView(下)

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原文地址:http://blog.csdn.net/makeyourchance/article/details/51708097

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