安卓开发学习之004 LinearLayout之分隔线 divider详解

本文主要介绍LinearLayout中分隔线Divider的使用方法
包括使用view/shape/图片显示分隔线
在android3.0及后面的版本在LinearLayout里增加了个分割线divider

1.使用方法

android:divider="@drawable/shape"<!--分割线图片或者样式-->
android:showDividers="middle|beginning|end|none" <!--分割线位置-->

分割线如果是图片那就直接使用图片就行，如果要使用颜色就必须使用shape来显示，直接使用颜色或Color是没有用的

2.亦可用View来显示分隔线

 <View  android:layout_width="match_parent" android:layout_height="@dimen/divider_margin" android:background="#f00"/>

3.效果图

4.布局文件

res/layout/fragment_divider.xml

<LinearLayout 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" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".DividerActivityFragment" tools:showIn="@layout/activity_divider">

    <LinearLayout  android:id="@+id/linearLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:divider="@drawable/bg_border" android:orientation="vertical" android:showDividers="middle">

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button1" />

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button2"/>

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button3"/>
    </LinearLayout>

    <RadioGroup  android:id="@+id/radioGroup" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" >

        <RadioButton  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="divider_beginning" />

        <RadioButton  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="middle"/>

        <RadioButton  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="end"/>


        <RadioButton  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="none"/>
    </RadioGroup>

    <LinearLayout  android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp" android:orientation="vertical">

        <TextView  android:layout_width="match_parent" android:layout_height="wrap_content" android:text="我是view直线"/>

        <View  android:layout_width="match_parent" android:layout_height="@dimen/divider_margin" android:background="#f00"/>
    </LinearLayout>

    <LinearLayout  android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginTop="10dp" android:divider="@mipmap/divider_line" android:orientation="vertical" android:showDividers="middle">

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button4" />

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button5"/>

        <Button  android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button6"/>

    </LinearLayout>

</LinearLayout>

5.java代码

package com.antex.divider;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.LinearLayout;
import android.widget.RadioGroup;

public class DividerActivity extends AppCompatActivity {
    //定义数组，用来表示分隔线显示位置
    private int[] dividers = {LinearLayout.SHOW_DIVIDER_BEGINNING, LinearLayout.SHOW_DIVIDER_MIDDLE, LinearLayout.SHOW_DIVIDER_END, LinearLayout.SHOW_DIVIDER_NONE};


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_divider);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });
        final LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linearLayout);
        RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
        //设置默认选中SHOW_DIVIDER_MIDDLE
        radioGroup.check(dividers[1]);
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                linearLayout.setShowDividers(dividers[checkedId-1]);

            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_divider, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

开发工具：Android Studio1.4
SDK: Android 6.0
API 23

代码下载：Divider.zip