将导航中的菜单项对齐到 android 中的右侧
Align menu item at Navigation to the right side in android
我在 android 应用程序中制作了导航抽屉，并使所有内容正确显示在右侧，但只有一个问题是菜单项与右侧对齐，但我做不到，我该怎么做？
图片显示左侧带有菜单项的导航
这是main_activity布局代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
这是 activity_main_drawer 菜单项 xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single" >
<item
android:id="@+id/nav_camera"
android:icon="@drawable/ic_menu_camera"
android:title="Camera" />
<item
android:id="@+id/nav_gallery"
android:icon="@drawable/ic_menu_gallery"
android:title="Gallery" />
<item
android:id="@+id/nav_slideshow"
android:icon="@drawable/ic_menu_slideshow"
android:title="Slideshow" />
<item
android:id="@+id/nav_manage"
android:icon="@drawable/ic_menu_manage"
android:title="Tools" />
</group>
<item android:title="Communicate">
<menu>
<item
android:id="@+id/nav_share"
android:icon="@drawable/ic_menu_share"
android:title="Share" />
<item
android:id="@+id/nav_send"
android:icon="@drawable/ic_menu_send"
android:title="Send" />
</menu>
</item>
这些项目中的问题我需要将其显示在右侧而不是左侧，因为我的导航是从右到左打开的
MainActivity 代码：
public class ParentMainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_parent);
/*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, "You have chosen mail option", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ImageButton menuRight = (ImageButton) findViewById(R.id.menuRight);
menuRight.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (drawer.isDrawerOpen(GravityCompat.END)) {
drawer.closeDrawer(GravityCompat.END);
} else {
drawer.openDrawer(GravityCompat.END);
}
}
});
/*ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();*/
NavigationView navigationView1 = (NavigationView) findViewById(R.id.nav_view);
navigationView1.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.END)) {
drawer.closeDrawer(GravityCompat.END);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, 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);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
String text = "";
if (id == R.id.nav_camera) {
text = "camera";
} else if (id == R.id.nav_gallery) {
text = "gallery";
} else if (id == R.id.nav_slideshow) {
text = "slideshow";
} else if (id == R.id.nav_manage) {
text = "tools";
} else if (id == R.id.nav_share) {
text = "share";
} else if (id == R.id.nav_send) {
text = "send";
Toast.makeText(this, "You have chosen " + text, Toast.LENGTH_LONG).show();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.END);
return true;
}
}
如果您的项目使用 API 17 级或更高级别，您可以将 android:supportsRtl 添加到 manifest.
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
...
</application>
此属性声明您的应用程序是否愿意支持从右到左 (RTL) 布局。如果设置为 true 并且 targetSdkVersion 设置为 17 或更高，系统将激活和使用各种 RTL API，以便您的应用程序可以显示 RTL 布局。如果设置为 false 或者如果 targetSdkVersion 设置为 16 或更低，RTL APIs 将被忽略或无效，并且无论与用户的区域设置相关联的布局方向（您的布局将始终从左到右）。
编辑：
此 post 中的答案表明存在一种强制 RTL 模式（如果可用）的方法。在 onCreate() 方法中调用 forceRTLIfSupported().
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private void forceRTLIfSupported() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
}
}
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:fitsSystemWindows="true"
android:layoutDirection="rtl" // set layoutDirection to 'rtl
app:itemIconTint="@drawable/drawer_selectcolor_imagecolor"
app:itemTextColor="@drawable/drawer_selectcolor_textcolor"
app:menu="@menu/nav_menu"/>
我在 android 应用程序中制作了导航抽屉，并使所有内容正确显示在右侧，但只有一个问题是菜单项与右侧对齐，但我做不到，我该怎么做？
图片显示左侧带有菜单项的导航
这是main_activity布局代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
这是 activity_main_drawer 菜单项 xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single" >
<item
android:id="@+id/nav_camera"
android:icon="@drawable/ic_menu_camera"
android:title="Camera" />
<item
android:id="@+id/nav_gallery"
android:icon="@drawable/ic_menu_gallery"
android:title="Gallery" />
<item
android:id="@+id/nav_slideshow"
android:icon="@drawable/ic_menu_slideshow"
android:title="Slideshow" />
<item
android:id="@+id/nav_manage"
android:icon="@drawable/ic_menu_manage"
android:title="Tools" />
</group>
<item android:title="Communicate">
<menu>
<item
android:id="@+id/nav_share"
android:icon="@drawable/ic_menu_share"
android:title="Share" />
<item
android:id="@+id/nav_send"
android:icon="@drawable/ic_menu_send"
android:title="Send" />
</menu>
</item>
这些项目中的问题我需要将其显示在右侧而不是左侧，因为我的导航是从右到左打开的
MainActivity 代码：
public class ParentMainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_parent);
/*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, "You have chosen mail option", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ImageButton menuRight = (ImageButton) findViewById(R.id.menuRight);
menuRight.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (drawer.isDrawerOpen(GravityCompat.END)) {
drawer.closeDrawer(GravityCompat.END);
} else {
drawer.openDrawer(GravityCompat.END);
}
}
});
/*ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();*/
NavigationView navigationView1 = (NavigationView) findViewById(R.id.nav_view);
navigationView1.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.END)) {
drawer.closeDrawer(GravityCompat.END);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, 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);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
String text = "";
if (id == R.id.nav_camera) {
text = "camera";
} else if (id == R.id.nav_gallery) {
text = "gallery";
} else if (id == R.id.nav_slideshow) {
text = "slideshow";
} else if (id == R.id.nav_manage) {
text = "tools";
} else if (id == R.id.nav_share) {
text = "share";
} else if (id == R.id.nav_send) {
text = "send";
Toast.makeText(this, "You have chosen " + text, Toast.LENGTH_LONG).show();
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.END);
return true;
}
}
如果您的项目使用 API 17 级或更高级别，您可以将 android:supportsRtl 添加到 manifest.
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
...
</application>
此属性声明您的应用程序是否愿意支持从右到左 (RTL) 布局。如果设置为 true 并且 targetSdkVersion 设置为 17 或更高，系统将激活和使用各种 RTL API，以便您的应用程序可以显示 RTL 布局。如果设置为 false 或者如果 targetSdkVersion 设置为 16 或更低，RTL APIs 将被忽略或无效，并且无论与用户的区域设置相关联的布局方向（您的布局将始终从左到右）。
编辑： 此 post 中的答案表明存在一种强制 RTL 模式（如果可用）的方法。在 onCreate() 方法中调用 forceRTLIfSupported().
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
private void forceRTLIfSupported() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
getWindow().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
}
}
<com.google.android.material.navigation.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="end"
android:fitsSystemWindows="true"
android:layoutDirection="rtl" // set layoutDirection to 'rtl
app:itemIconTint="@drawable/drawer_selectcolor_imagecolor"
app:itemTextColor="@drawable/drawer_selectcolor_textcolor"
app:menu="@menu/nav_menu"/>