本文主要是介绍Android DrawerLayout实现抽屉效果,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
官网:https://developer.android.com/training/implementing-navigation/nav-drawer.html
贴上主要的逻辑和布局文件:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/drawer_layout"android:layout_width="match_parent"android:layout_height="match_parent"><!-- content --><FrameLayoutandroid:id="@+id/drawer_container"android:layout_width="match_parent"android:layout_height="match_parent"/><!-- Drawer--><ListViewandroid:id="@+id/drawer_menu"android:layout_width="240dp"android:layout_height="match_parent"android:background="#FFF0F0F0"android:layout_gravity="start"/><!-- android:choiceMode 选中状态 跟onItemClick没有冲突 none 值为0,表示无选择模式; singleChoice 值为1,表示最多可以有一项被选中; multipleChoice 值为2,表示可以多项被选中。 android:layout_gravity left或right left或start right或end 表示在抽屉里的效果是从左到右还是从右到左出现 -->
</android.support.v4.widget.DrawerLayout>
这里需要注意一下:content主界面一定要定义在drawer的前面,另外,android:layout_gravity="start"(从左往右)或者android:layout_gravity="end"(从右往左),这个属性是必须要定义的,不然出现下面的异常:
MainActivity.java
package com.jackie.drawerlayoutdemo;import android.os.Bundle;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;public class MainActivity extends AppCompatActivity {private String mTitle;private DrawerLayout mDrawerLayout;private ListView mDrawerMenu;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();initData();//默认打开抽屉mDrawerLayout.openDrawer(mDrawerMenu);}private void initView() {mTitle = getResources().getString(R.string.app_name);mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);mDrawerMenu = (ListView) findViewById(R.id.drawer_menu);}private void initData() {//数组定义在xml 文件中String[] items = getResources().getStringArray(R.array.left_drawer_items);ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_expandable_list_item_1);adapter.addAll(items);mDrawerMenu.setAdapter(adapter);mDrawerMenu.setSelection(0);//设置点击item事件mDrawerMenu.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id) {mTitle = ((TextView) view).getText().toString();switchFragment();mDrawerLayout.closeDrawer(mDrawerMenu);mDrawerMenu.setSelection(position);}});}private void switchFragment() {getSupportFragmentManager().beginTransaction().replace(R.id.drawer_container, new ItemFragment(mTitle)).commit();getSupportActionBar().setTitle(mTitle);}
}
效果图如下:
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