Fragment - 用法+demo - android

Fragment参考

好的博客，时内容太多：

Fragment理解上 Fragment理解下

Fragment详解1 Fragment详解2

小demo：

需求：

MainActivity作为Fragment的载体，点击下面的首页、理财和账户切换自己的Fragment。

图：

代码：

MainActivity代码：这里使用了FragmentManager的hide和show方法，没有使用replace

package baofu.wallet;import android.app.FragmentManager;import android.app.FragmentTransaction;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.LinearLayout;import baofu.wallet.widget.ui.fragment.IndexFragment;import baofu.wallet.widget.ui.fragment.LiCaiFragment;import baofu.wallet.widget.ui.fragment.MineFragment;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private LinearLayout ll_index;    private LinearLayout ll_licai;    private LinearLayout ll_mine;    private IndexFragment indexFragment;    private LiCaiFragment liCaiFragment;    private MineFragment mineFragment;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ll_index = (LinearLayout) findViewById(R.id.ll_index);        ll_licai = (LinearLayout) findViewById(R.id.ll_licai);        ll_mine = (LinearLayout) findViewById(R.id.ll_mine);        indexFragment = new IndexFragment();        liCaiFragment = new LiCaiFragment();        mineFragment = new MineFragment();        FragmentManager fm = getFragmentManager();        FragmentTransaction ft = fm.beginTransaction();        ft.add(R.id.fl_top, indexFragment, "index");        ft.add(R.id.fl_top, liCaiFragment, "licai");        ft.add(R.id.fl_top, mineFragment, "mine");        ft.show(indexFragment);        ft.commit();        setClickListener();    }    //注册点击监听    private void setClickListener() {        ll_index.setOnClickListener(this);        ll_licai.setOnClickListener(this);        ll_mine.setOnClickListener(this);    }    @Override    public void onClick(View v) {        FragmentManager fm = getFragmentManager();        FragmentTransaction ft = fm.beginTransaction();        switch (v.getId()) {            case R.id.ll_index:                indexFragment = (IndexFragment) fm.findFragmentByTag("index");                ft.hide(liCaiFragment);                ft.hide(mineFragment);                ft.show(indexFragment).commit();                break;            case R.id.ll_licai:                liCaiFragment = (LiCaiFragment) fm.findFragmentByTag("licai");                ft.hide(indexFragment);                ft.hide(mineFragment);                ft.show(liCaiFragment).commit();                break;            case R.id.ll_mine:                mineFragment = (MineFragment) fm.findFragmentByTag("mine");                ft.hide(indexFragment);                ft.hide(liCaiFragment);                ft.show(mineFragment).commit();                break;        }    }}

activity_main.xml 这里使用FragmentLayout来存放三个Fragment

<?xml version="1.0" encoding="utf-8"?>

Fragment，这里只列出了MineFragment，其它两个雷同

MineFragment代码：

package baofu.wallet.widget.ui.fragment;import android.app.Fragment;import android.os.Bundle;import android.support.annotation.Nullable;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import baofu.wallet.R;/** * 我的 * Created by zst on 2017/3/2. */public class MineFragment extends Fragment {    private List> dataSourceList = new ArrayList>();    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        View view = inflater.inflate(R.layout.fragment_mine, container, false);        return view;    }}

fragment_mine.xml

<?xml version="1.0" encoding="utf-8"?>

简单实现完成。

Fragment - 用法+demo

Fragment参考

小demo：

需求：

代码：

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