大致效果如下
在viewPager中有5个fragment,在第二个fragment中有一个切换按钮,可以将自己切换为fragment6,之后点击fragment6中的按钮可以切换回来。。。。参考:
http://blog.csdn.net/z13759561330/article/details/40737381/
具体代码如下
FragmentActivity.class
package com.lsp.otherandroidtest.fragment_test;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.ViewGroup;import com.lsp.otherandroidtest.R;
import java.util.ArrayList;
import java.util.List;/**
Created by lsp on 2016/8/5.
*/
public class FragmentViewPagerTest extends AppCompatActivity {
private ViewPager viewPager;
private FragmentPagerAdapter adapter;
private ListfragmentList; private TestFragment testFragment1;
private TestFragment testFragment2;
private TestFragment testFragment3;
private TestFragment testFragment4;
private TestFragment testFragment5;private TestFragment testFragment6;
private boolean fragmentsUpdateFlag[] = {false, false, false, false, false};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fragment_test);initViewPager();
}
private void initViewPager() {
viewPager = (ViewPager) findViewById(R.id.id_vp); testFragment1 = TestFragment.getFragment("1"); testFragment2 = TestFragment.getFragment("2"); testFragment3 = TestFragment.getFragment("3"); testFragment4 = TestFragment.getFragment("4"); testFragment5 = TestFragment.getFragment("5"); testFragment6 = TestFragment.getFragment("6"); fragmentList = new ArrayList<>(); fragmentList.add(testFragment1); fragmentList.add(testFragment2); fragmentList.add(testFragment3); fragmentList.add(testFragment4); fragmentList.add(testFragment5); adapter = new MyAdapter(getSupportFragmentManager()); viewPager.setOffscreenPageLimit(5); viewPager.setAdapter(adapter); testFragment2.setTransListener(new TestFragment.onTranslateClick() { @Override public void onClick(String msg) { //点击切换按钮 //设置fragment2的tag为true fragmentsUpdateFlag[1] = true; //替换fragment fragmentList.set(1, testFragment6); adapter.notifyDataSetChanged(); } }); testFragment6.setTransListener(new TestFragment.onTranslateClick() { @Override public void onClick(String msg) { //点击切换按钮 //设置fragment2的tag为true fragmentsUpdateFlag[1] = true; //替换fragment fragmentList.set(1, testFragment6); //刷新 adapter.notifyDataSetChanged(); } });
}
public class MyAdapter extends FragmentPagerAdapter { private FragmentManager fm; public MyAdapter(FragmentManager fm) { super(fm); this.fm = fm; } @Override public Fragment getItem(int position) { return fragmentList.get(position % fragmentList.size()); } @Override public int getCount() { return fragmentList.size(); } @Override public int getItemPosition(Object object) { return POSITION_NONE; } @Override public Object instantiateItem(ViewGroup container, int position) { //得到缓存的fragment Fragment fragment = (Fragment) super.instantiateItem(container, position); //得到tag String fragmentTag = fragment.getTag(); if (fragmentsUpdateFlag[position % fragmentsUpdateFlag.length]) { //如果这个fragment需要更新 FragmentTransaction ft = fm.beginTransaction(); //移除旧的fragment ft.remove(fragment); //换成新的fragment fragment = fragmentList.get(position % fragmentList.size()); //添加新fragment时必须用前面获得的tag ❶ ft.add(container.getId(), fragment, fragmentTag); ft.attach(fragment); ft.commit(); //复位更新标志 fragmentsUpdateFlag[position % fragmentsUpdateFlag.length] = false; } return fragment; } }
}
FragmentActivity.XML
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
android:id="@+id/id_vp"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
TestFragment.class
package com.lsp.otherandroidtest.fragment_test;import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;import com.lsp.otherandroidtest.R;
/**
- Created by lsp on 2016/8/5.
*/
public class TestFragment extends Fragment {
private View view;
private String msg;
private onTranslateClick transListener;@Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { view = inflater.inflate(R.layout.fragment_test,null); msg = getArguments().getString("msg"); ((TextView)view.findViewById(R.id.id_tv)).setText(msg); if("2".equals(msg)||"6".equals(msg)) (view.findViewById(R.id.id_btn)).setVisibility(View.VISIBLE); (view.findViewById(R.id.id_btn)).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { transListener.onClick(msg); } }); return view; } public void setTransListener(onTranslateClick listener){ this.transListener = listener; } public interface onTranslateClick{ void onClick(String msg); } public static TestFragment getFragment(String msg){ TestFragment testFragment= new TestFragment(); Bundle bundle = new Bundle(); bundle.putString("msg",msg); testFragment.setArguments(bundle); return testFragment; }
}
TestFragment.xml
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
这里用来表示要替换的Fragment
在TestFragment中为按钮做了回调,当点击Fragment的按钮时,在FragmentActivity中处理,
这里是点击fragment中的回调处理,
最主要的处理部分在instantiateItem方法中..