应用程序:showAsAction
在菜单项中
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/nav_about"
android:icon="@drawable/ic_dashboard_black_24dp"
app:showAsAction="ifRoom"
android:title="@string/title_about" />
<item
android:id="@+id/nav_location"
android:icon="@drawable/nav_location"
app:showAsAction="ifRoom"
android:title="@string/title_location"
/>
<item
android:id="@+id/nav_phone"
android:icon="@drawable/nav_call"
app:showAsAction="ifRoom"
android:title="@string/title_phone"
/>
<item
android:id="@+id/nav_home"
android:icon="@drawable/ic_home_black_24dp"
app:showAsAction="ifRoom"
android:title="@string/title_home"
/>
</menu>
如果您的问题没有解决,请更换这个
之后,您可以使用此方法
禁用移位菜单
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
item.setShiftingMode(false);
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
更新菜单。java:`包数据站点。通用域名格式。konnex;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.internal.BottomNavigationItemView;
import android.support.design.internal.BottomNavigationMenuView;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.widget.TextViewCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;
import java.lang.reflect.Field;
public class Menu extends AppCompatActivity {
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.nav_about:
return true;
case R.id.nav_location:
return true;
case R.id.nav_phone:
return true;
case R.id.nav_home:
return true;
}
return false;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
disableShiftMode((BottomNavigationView)findViewById(R.id.navigation))
FrameLayout fml = (FrameLayout) findViewById(R.id.fm_cases);
fml.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(Menu.this, Cases.class);
startActivity(i);
}
});
}
public static void disableShiftMode(BottomNavigationView view) {
BottomNavigationMenuView menuView = (BottomNavigationMenuView) view.getChildAt(0);
try {
Field shiftingMode = menuView.getClass().getDeclaredField("mShiftingMode");
shiftingMode.setAccessible(true);
shiftingMode.setBoolean(menuView, false);
shiftingMode.setAccessible(false);
for (int i = 0; i < menuView.getChildCount(); i++) {
BottomNavigationItemView item = (BottomNavigationItemView) menuView.getChildAt(i);
item.setShiftingMode(false);
item.setChecked(item.getItemData().isChecked());
}
} catch (NoSuchFieldException e) {
Log.e("BNVHelper", "Unable to get shift mode field", e);
} catch (IllegalAccessException e) {
Log.e("BNVHelper", "Unable to change value of shift mode", e);
}
}
}
`<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/nav_about"
android:icon="@drawable/ic_dashboard_black_24dp"
android:title="@string/title_about"
app:showAsAction="always|withText"/>
<item
android:id="@+id/nav_location"
android:icon="@drawable/nav_location"
android:title="@string/title_location"
app:showAsAction="always|withText" />
<item
android:id="@+id/nav_phone"
android:icon="@drawable/nav_call"
android:title="@string/title_phone"
app:showAsAction="always|withText"/>
<item
android:id="@+id/nav_home"
android:icon="@drawable/ic_home_black_24dp"
android:title="@string/title_home"
app:showAsAction="always|withText" />
</menu>
`