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我看到了带有以下链接的视频：ParallaxHeaderViewPager Github：StowableHeaderViewPager我非常喜欢背景图片可以随动画效果移动的视差效果。我想将此功能添加到我的项目中。Android - 如何将视差效果添加到导航背景图片
这里是我的代码： nav_header_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="match_parent"
android:background="@android:color/white">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="190dp"
android:background="@drawable/background_material_red"
android:id="@+id/header_bgdimage"
android:orientation="vertical">
<de.hdodenhof.circleimageview.CircleImageView
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/profile_image"
android:layout_width="70dp"
android:layout_height="70dp"
android:src="@mipmap/ic_profile"
app:border_color="#FF000000"
android:layout_marginLeft="24dp"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginStart="24dp" />
<!--set default name-->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Wang Jian"
android:textSize="14sp"
android:textColor="#FFF"
android:textStyle="bold"
android:gravity="left"
android:paddingBottom="4dp"
android:id="@+id/username"
android:layout_above="@+id/email"
android:layout_alignLeft="@+id/profile_image"
android:layout_alignStart="@+id/profile_image" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="[email protected]"
android:id="@+id/email"
android:gravity="left"
android:layout_marginBottom="8dp"
android:textSize="14sp"
android:textColor="#fff"
android:layout_alignParentBottom="true"
android:layout_alignLeft="@+id/username"
android:layout_alignStart="@+id/username" />
</RelativeLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/nav_tabs"
android:layout_below="@+id/header_bgdimage"
android:elevation="6dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_centerHorizontal="true"
android:minHeight="?attr/actionBarSize"
android:fillViewport="false">
<Button
android:id="@+id/me"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:drawableTop="@drawable/ic_action_user"
android:text="我的"
android:fontFamily="@string/font_fontFamily_medium"
android:textColor="#FFFFFF"
android:background="#0F1E2D" />
<Button
android:id="@+id/redeem"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:drawableTop="@drawable/ic_action_mustache"
android:text="特权"
android:fontFamily="@string/font_fontFamily_medium"
android:textColor="#FFFFFF"
android:background="#0F1E2D"/>
<Button
android:id="@+id/topic"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:drawableTop="@drawable/ic_action_dialog"
android:text="话题"
android:textColor="#FFFFFF"
android:fontFamily="@string/font_fontFamily_medium"
android:background="#0F1E2D" />
<Button
android:id="@+id/favorite"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:drawableTop="@drawable/ic_action_heart"
android:text="收藏"
android:fontFamily="@string/font_fontFamily_medium"
android:textColor="#FFFFFF"
android:background="#0F1E2D"/>
</LinearLayout>
</RelativeLayout>
现在我想我的导航背景图片android:background="@drawable/background_material_red"可以有视差效果。
这里是我的Java代码：NavigationActivity
public class NavigationActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
NavigationView navigationView = null;
Toolbar toolbar = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Set the fragment initially
PersonalFragment fragment = new PersonalFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.commit();
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
navigationView = (NavigationView) findViewById(R.id.nav_view);
//How to change elements in the header programmatically
View headerView = navigationView.getHeaderView(0);
TextView ProfileText = (TextView) headerView.findViewById(R.id.email);
ProfileText.setText("马来西亚第一");
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} 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.tools_bar, 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;
}
if(id == R.id.action_search){
Toast.makeText(getApplicationContext(), "Search action is selected!", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_profile) {
PersonalFragment fragment = new PersonalFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.commit();
setTitle(R.string.title_home);
} else if (id == R.id.nav_award) {
AwardFragment fragment = new AwardFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.commit();
setTitle(R.string.title_award);
} else if (id == R.id.nav_others) {
OthersFragment fragment = new OthersFragment();
android.support.v4.app.FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragment_container, fragment);
fragmentTransaction.commit();
setTitle(R.string.title_others);
} else if (id == R.id.nav_manage) {
setTitle(R.string.title_tools);
} else if (id == R.id.nav_setting) {
setTitle(R.string.title_setting);
} else if (id == R.id.nav_about) {
setTitle(R.string.title_about);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}`
我在这个东西，所以任何帮助将不胜感激一个新手。提前致谢！
感谢您的回复其实我想让背景图像可以像YouTube视频节目般的蜗牛。 –