fragment

最新推荐文章于 2024-06-25 10:30:00 发布

guoliangzhao

最新推荐文章于 2024-06-25 10:30:00 发布

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本文链接：https://blog.youkuaiyun.com/guoliangzhao/article/details/100124241

版权

本文介绍了一个使用RelativeLayout和Fragment实现的底部导航栏布局示例。通过按钮点击事件，切换不同的Fragment，展示视频列表、选择界面和用户信息。文章详细介绍了XML布局代码和Java逻辑处理，包括Fragment的显示和隐藏，以及防止快速连续点击的处理。

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布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:layout_width="match_parent"
       android:layout_height="match_parent">

    <FrameLayout
        android:id="@+id/contentPanel"
        android:layout_above="@+id/fl_tab"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <RelativeLayout
        android:id="@+id/fl_tab"
        android:layout_width="match_parent"
        android:layout_height="44dp"
        android:layout_alignParentBottom="true"
        android:background="#1f2531">
        
        <Button
            android:id="@+id/btn_home_select"
            android:layout_width="58dp"
            android:layout_height="36dp"
            android:layout_centerInParent="true"
            android:background="@drawable/tab_home_select"/>

        <Button
            android:id="@+id/btn_home_left"
            android:layout_toLeftOf="@id/btn_home_select"
            android:layout_marginRight="67dp"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:layout_centerVertical="true"
            android:background="@drawable/ic_home_video_selected"/>

        <Button
            android:id="@+id/btn_home_right"
            android:layout_toRightOf="@id/btn_home_select"
            android:layout_marginLeft="67dp"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:layout_centerVertical="true"
            android:background="@drawable/ic_user_normal"/>

    </RelativeLayout>

    <!--<android.support.v4.app.FragmentTabHost-->
        <!--android:id="@android:id/tabhost"-->
        <!--android:layout_width="match_parent"-->
        <!--android:layout_height="wrap_content"-->
        <!--android:layout_gravity="bottom"-->
        <!--android:background="#1f2531"/>-->

</RelativeLayout>

Java代码：

public class TCMainActivity extends FragmentActivity implements View.OnClickListener {
    private static final String TAG = "TCMainActivity";

    private Button mBtnVideo, mBtnSelect, mBtnUser;
    private Fragment mCurrentFragment;
    private Fragment mTCLiveListFragment, mTCUserInfoFragment;

    private long mLastClickPubTS = 0;

    private ShortVideoDialog mShortVideoDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

     

        setContentView(R.layout.activity_main);

        initView();
//显示第一个fragment
        showVideoFragment();

   
    }

    

    
    

    private void initView() {
        mShortVideoDialog = new ShortVideoDialog();

        mBtnVideo = (Button) findViewById(R.id.btn_home_left);
        mBtnSelect = (Button) findViewById(R.id.btn_home_select);
        mBtnUser = (Button) findViewById(R.id.btn_home_right);

        mBtnUser.setOnClickListener(this);
        mBtnVideo.setOnClickListener(this);
        mBtnSelect.setOnClickListener(this);
    }

  

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_home_left:
                showVideoFragment();
                break;
            case R.id.btn_home_select:
                showSelect();
                break;
            case R.id.btn_home_right:
                showUserFragment();
                break;
        }
    }

    private void showSelect() {
        if (!TCUserMgr.getInstance().hasUser()) {
            Intent intent = new Intent(TCMainActivity.this, TCLoginActivity.class);
            startActivity(intent);
        } else {
            // 防止多次点击
            if (System.currentTimeMillis() - mLastClickPubTS > 1000) {
                mLastClickPubTS = System.currentTimeMillis();
                if (mShortVideoDialog.isAdded())
                    mShortVideoDialog.dismiss();
                else
                    mShortVideoDialog.show(getFragmentManager(), "");
            }
        }
    }

    private void showUserFragment() {
        mBtnVideo.setBackgroundResource(R.drawable.ic_home_video_normal);
        mBtnUser.setBackgroundResource(R.drawable.ic_user_selected);
        if (mTCUserInfoFragment == null) {
            mTCUserInfoFragment = new TCUserInfoFragment();
        }
        showFragment(mTCUserInfoFragment, "user_fragment");
    }

    private void showVideoFragment() {
        mBtnVideo.setBackgroundResource(R.drawable.ic_home_video_selected);
        mBtnUser.setBackgroundResource(R.drawable.ic_user_normal);
        if (mTCLiveListFragment == null) {
            mTCLiveListFragment = new TCLiveListFragment();
        }
        showFragment(mTCLiveListFragment, "live_list_fragment");
    }
//显示fragment，添加tag防止fragment重叠
    private void showFragment(Fragment fragment, String tag) {
        if (fragment == mCurrentFragment) return;
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        if (mCurrentFragment != null) {
            transaction.hide(mCurrentFragment);
        }
        if (!fragment.isAdded()) {
            transaction.add(R.id.contentPanel, fragment, tag);
        } else {
            transaction.show(fragment);
        }
        mCurrentFragment = fragment;
        transaction.commit();
    }

}