![enter image description here](https://istack.dev59.com/fnCXr.webp)
package com.aaron.waller.mrpolitik;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private TextView mTextMessage;
private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
= new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.navigation_home:
mTextMessage.setText(R.string.title_home);
case R.id.navigation_dashboard:
mTextMessage.setText(R.string.title_dashboard);
case R.id.navigation_notifications:
mTextMessage.setText(R.string.title_notifications);
}
return true;
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextMessage = (TextView) findViewById(R.id.message);
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
}
}
如何使用底部导航栏切换到新的Fragment? 例如,我有3个Fragment: Fragment1 Fragment2和 Fragment3 我想用底部导航栏上的3个按钮切换到它们。 此外,我希望能够通过左右滑动手指来切换Fragments,我该如何做到这一点?