直接上代码
把加载fragment写在监听里可是程序一运行就已经显示了
package com.example.bmvod.fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private GalleryAdapter mAdapter;
private List mDatas;
private FirstFragment firstFragment;
private SecondFragment secondFragment;
// private ThirdFragment thirdFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initDatas();
mRecyclerView = (RecyclerView) findViewById(R.id.recid1);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
mRecyclerView.setLayoutManager(linearLayoutManager);
mAdapter = new GalleryAdapter(this, mDatas);
mAdapter.setOnItemClickLitener(new GalleryAdapter.OnItemClickLitener() {
@Override
public void onItemClick(View view, int position) {
FragmentManager fm = getFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
switch (position) {
case 0:
firstFragment = new FirstFragment();
transaction.add(R.id.fragment, firstFragment);
hideAllFragments(transaction);
transaction.show(firstFragment);
break;
case 1:
secondFragment = new SecondFragment();
transaction.add(R.id.fragment, secondFragment);
hideAllFragments(transaction);
transaction.show(secondFragment);
break;
}
transaction.commit();
}
});
mRecyclerView.setAdapter(mAdapter);
}
private void hideAllFragments(FragmentTransaction ft) {
if (firstFragment != null) {
ft.hide(firstFragment);
}
if (secondFragment != null) {
ft.hide(secondFragment);
}
}
private void initDatas() {
mDatas = new ArrayList<Integer>(Arrays.asList(R.drawable.bottom1,
R.drawable.bottom2, R.drawable.bottom3, R.drawable.bottom4, R.drawable.bottom5,
R.drawable.bottom1, R.drawable.bottom2, R.drawable.bottom3, R.drawable.bottom4));
}
private void setDefaultFragment() {
FragmentManager fm = getFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
firstFragment = new FirstFragment();
transaction.replace(R.id.fragment, firstFragment);
transaction.commit();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.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);
}
}
package com.example.bmvod.fragment;
import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
-
Created by bmvod on 2016/6/29.
*/
public class FirstFragment extends Fragment {private RecyclerView mRecyclerView;
private GalleryAdapter2 mAdapter;
private List mDatas;@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.firstfragmentlayout, container, false);
initDatas2();
mRecyclerView = (RecyclerView) view.findViewById(R.id.fragmengrecv1);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());
linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
mRecyclerView.setLayoutManager(linearLayoutManager);
mAdapter = new GalleryAdapter2(getActivity(), mDatas);
mRecyclerView.setAdapter(mAdapter);
return view;
}private void initDatas2() {
mDatas = new ArrayList(Arrays.asList(R.drawable.smalltop1,
R.drawable.smalltop2, R.drawable.smalltop3, R.drawable.smalltop4, R.drawable.smalltop5,
R.drawable.smalltop1, R.drawable.smalltop2, R.drawable.smalltop3, R.drawable.smalltop4));
}
}