[英]How to add navigation drawer on pre built app?
我是android开发的新手。 我已经构建了没有导航抽屉的应用程序。 现在,我想添加导航抽屉,该抽屉在我的应用程序中的所有活动中都相同。 帮助我解决这个问题。
假设您的原始活动正在扩展“ AppCompatActivity”,请像下面那样进行基本活动,并将所有其他活动扩展到“ BaseActivity”。 BaseActivity布局将包含DrawaerLayout和一个framelayout。 在BaseActivity ovveride setcontentview方法内部,并在framelayout内部扩大活动布局。
BaseActivity.Java
public class BaseActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {
private FrameLayout baseLayout;
public ActionBarDrawerToggle drawerToggle;
public Toolbar toolbar;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.base_layout);
toolbar = (Toolbar) findViewById( R.id.toolbar);
setSupportActionBar(toolbar);
baseLayout = (FrameLayout) findViewById(R.id.base_view);
NavigationView navigationView = (NavigationView) findViewById(R.id.navigation_view);
DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView.setNavigationItemSelectedListener(this);
drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, 0, 0);
drawerLayout.addDrawerListener(drawerToggle);
}
@Override
public void setContentView(View view) {
if (baseLayout != null) {
ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
baseLayout.addView(view, params);
}
}
@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
if (baseLayout != null) {
baseLayout.addView(view, params);
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
//TODO
return false;
}
}
base_layout.xml
<?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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.design.widget.AppBarLayout
style="@style/Widget.MyApp.Toolbar.Solid"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:id="@+id/base_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation_view"
android:layout_width="280sp"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/base_header"
app:menu="@menu/drawer" />
</android.support.v4.widget.DrawerLayout>
base_header.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="@dimen/nav_header_height"
android:background="@drawable/blank"
android:orientation="vertical">
<ImageView
android:id="@+id/nav_header_icon"
android:layout_width="50sp"
android:layout_height="50sp"
android:layout_marginBottom="8dp"
android:layout_marginStart="16sp"
android:contentDescription="@null"
android:src="@mipmap/ic_launcher"
app:layout_constraintBottom_toTopOf="@+id/nav_header_title"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/nav_header_title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16sp"
android:layout_marginStart="16sp"
android:fontFamily="sans-serif-medium"
android:text="@string/app_name"
app:layout_constraintBottom_toTopOf="@+id/nav_header_subtitle"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/nav_header_subtitle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="16sp"
android:layout_marginStart="16sp"
android:fontFamily="sans-serif"
android:text="@string/app_name"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>
在资源中的“ menu”文件夹中添加抽屉。
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
android:checkableBehavior="single">
<item
android:id="@+id/nav_home"
android:icon="@drawable/icon_home"
android:title="Home" />
</menu>
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