android源代码的编译过程_易语言绘制「建议收藏」

编程小6 Android (65) 2023-09-08 09:12

Hi，大家好，我是编程小6，很荣幸遇见你，我把这些年在开发过程中遇到的问题或想法写出来，今天说一说android源代码的编译过程_易语言绘制「建议收藏」,希望能够帮助你!!!。

1.使用的注意事项

1.主内容视图一定要是DrawerLayout的第一个子视图
2.主内容视图宽度和高度需要match_parent
3.必须显示指定侧滑视图的android:layout_gravity属性 android:layout_gravity = "start"时，从左向右滑出菜单 android:layout_gravity = "end"时，从右向左滑出菜单不推荐使用left和right!!!
侧滑视图的宽度以dp为单位，不建议超过320dp(为了总能看到一些主内容视图)
设置侧滑事件：mDrawerLayout.setDrawerListener(DrawerLayout.DrawerListener);
要说一点：可以结合Actionbar使用当用户点击Actionbar上的应用图标，弹出侧滑菜单！这里就要通过ActionBarDrawerToggle，它是DrawerLayout.DrawerListener的具体实现类，我们可以重写ActionBarDrawerToggle的onDrawerOpened()和onDrawerClosed()以监听抽屉拉出或隐藏事件！但是这里我们不讲，因为5.0后我们使用的是Toolbar！有兴趣的可以自行查阅相关文档！

2.使用代码示例

示例1：单个侧滑菜单的实现

运行效果图：

android源代码的编译过程_易语言绘制「建议收藏」_https://bianchenghao6.com/blog_Android_第1张

实现关键代码：

首先是我们的主布局，注意：最外层要是DrawerLayout哦！！！！

activity_main.xml：

<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">

<FrameLayout

android:id="@+id/ly_content"

android:layout_width="match_parent"

android:layout_height="match_parent" />

<ListView

android:id="@+id/list_left_drawer"

android:layout_width="180dp"

android:layout_height="match_parent"

android:layout_gravity="start"

android:background="#080808"

android:choiceMode="singleChoice"

android:divider="#FFFFFF"

android:dividerHeight="1dp" />

</android.support.v4.widget.DrawerLayout>

接着ListView的布局代码和domain类：Item比较简单，就不给出了，直接上中间Fragment的布局以及代码吧！另外Adapter直接复用我们之前写的那个可复用的MyAdapter！

fg_content.xml：

<?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"

android:orientation="vertical">

<TextView

android:id="@+id/tv_content"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:textSize="25sp" />

</RelativeLayout>

ContentFragment.java：

/**

* Created by Jay on 2015/10/8 0008.

public class ContentFragment extends Fragment {

private TextView tv_content;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fg_content, container, false);

tv_content = (TextView) view.findViewById(R.id.tv_content);

String text = getArguments().getString("text");

tv_content.setText(text);

return view;

}

最后是我们的Activity类

MainActivity.java：

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{

private DrawerLayout drawer_layout;

private ListView list_left_drawer;

private ArrayList<Item> menuLists;

private MyAdapter<Item> myAdapter = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);

list_left_drawer = (ListView) findViewById(R.id.list_left_drawer);

menuLists = new ArrayList<Item>();

menuLists.add(new Item(R.mipmap.iv_menu_realtime,"实时信息"));

menuLists.add(new Item(R.mipmap.iv_menu_alert,"提醒通知"));

menuLists.add(new Item(R.mipmap.iv_menu_trace,"活动路线"));

menuLists.add(new Item(R.mipmap.iv_menu_settings,"相关设置"));

myAdapter = new MyAdapter<Item>(menuLists,R.layout.item_list) {

@Override

public void bindView(ViewHolder holder, Item obj) {

holder.setImageResource(R.id.img_icon,obj.getIconId());

holder.setText(R.id.txt_content, obj.getIconName());

}

};

list_left_drawer.setAdapter(myAdapter);

list_left_drawer.setOnItemClickListener(this);

}

@Override

public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

ContentFragment contentFragment = new ContentFragment();

Bundle args = new Bundle();

args.putString("text", menuLists.get(position).getIconName());

contentFragment.setArguments(args);

FragmentManager fm = getSupportFragmentManager();

fm.beginTransaction().replace(R.id.ly_content,contentFragment).commit();

drawer_layout.closeDrawer(list_left_drawer);

}

代码很简单，就不多说了~

示例2.左右两个侧滑菜单的实现

嗯，不知道你有没有发现，从上面的DrawerLayout的布局，我们大概可以猜到，DrawerLayout 最多由三个部分组成，中间的内容部分，左边的侧滑菜单部分，右边的侧滑菜单部分组成！下面我们来写一个带有两个侧滑菜单的示例！

运行效果图：

android源代码的编译过程_易语言绘制「建议收藏」_https://bianchenghao6.com/blog_Android_第2张

代码实现：

首先我们创建两个Fragment以及对应的布局，他们分别是左右侧滑菜单！

左边Fragment：

布局：fg_left.xml，这里就用了一个图片而以，点击后弹出一个新的Activity；当然你可以根据自己的需求进行扩展！

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical" android:layout_width="match_parent"

android:layout_height="match_parent">

<ImageView

android:id="@+id/img_bg"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@mipmap/bg_menu_left"/>

</LinearLayout>

对应的LeftFragment.java：

/**

* Created by Jay on 2015/10/9 0009.

public class LeftFragment extends Fragment{

private DrawerLayout drawer_layout;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fg_left, container, false);

ImageView img_bg = (ImageView) view.findViewById(R.id.img_bg);

img_bg.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

getActivity().startActivity(new Intent(getActivity(),OtherActivity.class));

drawer_layout.closeDrawer(Gravity.START);

}

});

return view;

}

//暴露给Activity，用于传入DrawerLayout，因为点击后想关掉DrawerLayout

public void setDrawerLayout(DrawerLayout drawer_layout){

this.drawer_layout = drawer_layout;

}

右面的Fragment：

布局就三个按钮，点击后替换中间部分的Fragment，布局fg_right.xml代码如下：

<?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:background="#2F9AF2"

android:gravity="center"

android:orientation="vertical">

<Button

android:id="@+id/btn_one"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="菜单项一" />

<Button

android:id="@+id/btn_two"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="菜单项二" />

<Button

android:id="@+id/btn_three"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="菜单项三" />

</LinearLayout>

然后对应的是RightFragment.java：

/**

* Created by Jay on 2015/10/9 0009.

public class RightFragment extends Fragment implements View.OnClickListener{

private DrawerLayout drawer_layout;

private FragmentManager fManager;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fg_right, container, false);

view.findViewById(R.id.btn_one).setOnClickListener(this);

view.findViewById(R.id.btn_two).setOnClickListener(this);

view.findViewById(R.id.btn_three).setOnClickListener(this);

fManager = getActivity().getSupportFragmentManager();

return view;

}

@Override

public void onClick(View v) {

switch (v.getId()){

case R.id.btn_one:

ContentFragment cFragment1 = new ContentFragment("1.点击了右侧菜单项一",R.color.blue);

fManager.beginTransaction().replace(R.id.fly_content,cFragment1).commit();

drawer_layout.closeDrawer(Gravity.END);

break;

case R.id.btn_two:

ContentFragment cFragment2 = new ContentFragment("2.点击了右侧菜单项二",R.color.red);

fManager.beginTransaction().replace(R.id.fly_content,cFragment2).commit();

drawer_layout.closeDrawer(Gravity.END);

break;

case R.id.btn_three:

ContentFragment cFragment3 = new ContentFragment("3.点击了右侧菜单项三",R.color.yellow);

fManager.beginTransaction().replace(R.id.fly_content,cFragment3).commit();

drawer_layout.closeDrawer(Gravity.END);

break;

}

public void setDrawerLayout(DrawerLayout drawer_layout){

this.drawer_layout = drawer_layout;

}

另外还有一个中间部分填充的ContentFragment，布局：fg_content.xml如下：

<?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"

android:orientation="vertical">

<TextView

android:id="@+id/tv_content"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:textSize="25sp" />

</RelativeLayout>

ContentFragment.java：

public class ContentFragment extends Fragment {

private TextView tv_content;

private String strContent;

private int bgColor;

public ContentFragment(String strContent,int bgColor) {

this.strContent = strContent;

this.bgColor = bgColor;

}

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fg_content, container, false);

view.setBackgroundColor(getResources().getColor(bgColor));

tv_content = (TextView) view.findViewById(R.id.tv_content);

tv_content.setText(strContent);

return view;

}

编写好以后，就到我们的Activity的布局了以及Activity的代码了：在此之前我们还需要些一个顶部条形栏的布局：

view_topbar.xml：

<?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="wrap_content"

android:background="#DCDEDB">

<Button

android:id="@+id/btn_right"

android:layout_width="40dp"

android:layout_height="40dp"

android:layout_centerVertical="true"

android:layout_alignParentRight="true"

android:background="@drawable/btn_selctor"/>

</RelativeLayout>

然后是activity_main.xml：

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/drawer_layout"

android:layout_width="match_parent"

android:layout_height="match_parent">

<LinearLayout

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<include

android:id="@+id/topbar"

layout="@layout/view_topbar"

android:layout_width="wrap_content"

android:layout_height="48dp" />

<FrameLayout

android:id="@+id/fly_content"

android:layout_width="match_parent"

android:layout_height="match_parent" />

</LinearLayout>

<fragment

android:id="@+id/fg_left_menu"

android:name="jay.com.drawerlayoutdemo2.LeftFragment"

android:layout_width="300dp"

android:layout_height="match_parent"

android:layout_gravity="start"

android:tag="LEFT"

tools:layout="@layout/fg_left" />

<fragment

android:id="@+id/fg_right_menu"

android:name="jay.com.drawerlayoutdemo2.RightFragment"

android:layout_width="100dp"

android:layout_height="match_parent"

android:layout_gravity="end"

android:tag="RIGHT"

tools:layout="@layout/fg_right" />

</android.support.v4.widget.DrawerLayout>

最后是MainActivity.java：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private DrawerLayout drawer_layout;

private FrameLayout fly_content;

private View topbar;

private Button btn_right;

private RightFragment fg_right_menu;

private LeftFragment fg_left_menu;

private FragmentManager fManager;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

fManager = getSupportFragmentManager();

fg_right_menu = (RightFragment) fManager.findFragmentById(R.id.fg_right_menu);

fg_left_menu = (LeftFragment) fManager.findFragmentById(R.id.fg_left_menu);

initViews();

}

private void initViews() {

drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);

fly_content = (FrameLayout) findViewById(R.id.fly_content);

topbar = findViewById(R.id.topbar);

btn_right = (Button) topbar.findViewById(R.id.btn_right);

btn_right.setOnClickListener(this);

//设置右面的侧滑菜单只能通过编程来打开

drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED,

Gravity.END);

drawer_layout.setDrawerListener(new DrawerLayout.DrawerListener() {

@Override

public void onDrawerSlide(View view, float v) {

}

@Override

public void onDrawerOpened(View view) {

}

@Override

public void onDrawerClosed(View view) {

drawer_layout.setDrawerLockMode(

DrawerLayout.LOCK_MODE_LOCKED_CLOSED, Gravity.END);

}

@Override

public void onDrawerStateChanged(int i) {

}

});

fg_right_menu.setDrawerLayout(drawer_layout);

fg_left_menu.setDrawerLayout(drawer_layout);

}

@Override

public void onClick(View v) {

drawer_layout.openDrawer(Gravity.RIGHT);

drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED,

Gravity.END); //解除锁定

}

好的，至此就大功告成了~，呼呼，下面说下看代码时可能会有的疑惑：

1. drawer_layout.openDrawer(Gravity.END);
这句是设置打开的哪个菜单START代表左边，END代表右边
2. drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED,Gravity.END); 锁定右面的侧滑菜单，不能通过手势关闭或者打开，只能通过代码打开！即调用openDrawer方法！接着 drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED,Gravity.END); 解除锁定状态，即可以通过手势关闭侧滑菜单最后在drawer关闭的时候调用： drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, Gravity.END); 再次锁定右边的侧滑菜单！
3. 布局代码中的Tag属性的作用？答：这里没用到，在重写DrawerListener的onDrawerSlide方法时，我们可以通过他的第一个参数drawerView，调用drawerView.getTag().equals("START")判断触发菜单事件的是哪个菜单！然后可以进行对应的操作！

3.代码示例下载

DrawerLayoutDemo.zip

DrawerLayoutDemo2.zip

本节小结：