Android 底部导航 UI框架

此版本在“一个不错的UI框架”基础上修改了首次启动底部导航没有选中Tab的情况

运行效果图如下：

1、TabView.java 这里修改的是mState=-1

/*******************************************************************************
 *
 * Copyright (c) Weaver Info Tech Co. Ltd
 *
 * TabView
 *
 * app.ui.widget.TabView.java
 * TODO: File description or class description.
 *
 * @author: Administrator
 * @since:  2014-4-22
 * @version: 1.0.0
 *
 * @changeLogs:
 *     1.0.0: First created this class.
 *
 ******************************************************************************/
package app.ui.widget;

import mobi.kuaidian.qunakao.R;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;

/**
 * @author Administrator
 *
 */
public class TabView extends LinearLayout implements OnClickListener {

    private OnTabChangeListener mOnTabChangedListener;

    private int mState = -1;

    private final Button mStateButton1;
    private final Button mStateButton2;
    private final Button mStateButton3;
    private final Button mStateButton4;

    public TabView(Context context) {
        this(context, null);
    }

    public TabView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    /**
     * @param context
     * @param attrs
     * @param defStyle
     */
    public TabView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        inflate(context, R.layout.view_tab, this);
        mStateButton1 = (Button) findViewById(R.id.button_state1);
        mStateButton2 = (Button) findViewById(R.id.button_state2);
        mStateButton3 = (Button) findViewById(R.id.button_state3);
        mStateButton4 = (Button) findViewById(R.id.button_state4);

        mStateButton1.setOnClickListener(this);
        mStateButton2.setOnClickListener(this);
        mStateButton3.setOnClickListener(this);
        mStateButton4.setOnClickListener(this);
    }

    public void setOnTabChangeListener(OnTabChangeListener listener) {
        mOnTabChangedListener = listener;
    }

    public void setCurrentTab(int index) {
        switchState(index);
    }

    private void switchState(int state) {
        if (mState == state) {
            return;
        } // else continue

        mState = state;
        mStateButton1.setSelected(false);
        mStateButton2.setSelected(false);
        mStateButton3.setSelected(false);
        mStateButton4.setSelected(false);

        Object tag = null;

        switch (mState) {
            case 0:
                mStateButton1.setSelected(true);
                tag = mStateButton1.getTag();
                break;

            case 1:
                mStateButton2.setSelected(true);
                tag = mStateButton2.getTag();
                break;

            case 2:
                mStateButton3.setSelected(true);
                tag = mStateButton3.getTag();
                break;

            case 3:
                mStateButton4.setSelected(true);
                tag = mStateButton4.getTag();
                break;

            default:
                break;
        }

        if (mOnTabChangedListener != null) {
            if (tag != null && mOnTabChangedListener != null) {
                mOnTabChangedListener.onTabChange(tag.toString());
            } else {
                mOnTabChangedListener.onTabChange(null);
            }
        } // else ignored
    }


    /* (non-Javadoc)
     * @see android.view.View.OnClickListener#onClick(android.view.View)
     */
    @Override
    public void onClick(View v) {

        // TODO Auto-generated method stub
        switch (v.getId()) {
            case R.id.button_state1:
                switchState(0);
                break;

            case R.id.button_state2:
                switchState(1);
                break;

            case R.id.button_state3:
                switchState(2);
                break;

            case R.id.button_state4:
                switchState(3);
                break;

            default:
                break;
        }
    }

    public static interface OnTabChangeListener {
        public void onTabChange(String tag);
    }
}

2、StartActivity.java 将mTabView.setCurrentTab(0); 移动到setupViews();之后

package app.ui.activity;

import mobi.kuaidian.qunakao.R;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import android.view.KeyEvent;
import android.widget.TextView;

import app.ui.FragmentCallback;
import app.ui.fragment.ProfileFragment;
import app.ui.fragment.ServiceFragment;
import app.ui.fragment.SessionFragment;
import app.ui.fragment.SettingFragment;
import app.ui.widget.TabView;
import app.ui.widget.TabView.OnTabChangeListener;
import app.util.DialogUtils;
import app.util.FragmentUtils;

public class StartActivity extends FragmentActivity implements OnTabChangeListener, FragmentCallback {

    private FragmentManager mFragmentManager;
    private Fragment mCurrentFragment;
    private TabView mTabView;
    private TextView mTitleTextView;

    /** 上一次的状态 */
    private int mPreviousTabIndex = 1;
    /** 当前状态 */
    private int mCurrentTabIndex = 1;

    /** 再按一次退出程序*/
    private long exitTime = 0;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mFragmentManager = getSupportFragmentManager();
        mCurrentTabIndex = 1;
        mPreviousTabIndex = 1;
        setupViews();
        
        mTabView.setCurrentTab(0);
    }
    private void setupViews()
    {
        setContentView(R.layout.activity_start);
        mTitleTextView = (TextView) findViewById(R.id.text_title);
        mTabView = (TabView) findViewById(R.id.view_tab);
        mTabView.setOnTabChangeListener(this);
//        mTabView.setCurrentTab(mCurrentTabIndex);
        mCurrentFragment = new ServiceFragment();
        FragmentUtils.replaceFragment(mFragmentManager, R.id.layout_content,ServiceFragment.class, null, false);
    }
    /* (non-Javadoc)
     * @see android.support.v4.app.FragmentActivity#onActivityResult(int, int, android.content.Intent)
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode) {/*
            case BaseActivity.REQUEST_OK_LOGIN:
                if (resultCode == RESULT_OK) {
                    ApplicationUtils.showToast(this, R.string.text_loginsuccess);
                    mTitleTextView.setText(R.string.text_tab_profile);
                    final ProfileFragment profileFragment =
                            (ProfileFragment) mFragmentManager.findFragmentByTag(ProfileFragment.class.getSimpleName());
                    if (profileFragment != null) {
                        Log.d(TAG, "ProfileFragment is refreshing.");
                        profileFragment.refreshViews();
                    } else {
                        Log.e(TAG, "ProfileFragment is null.");
                    }
                } else {
                    // 返回原来的页面
                    mTabView.setCurrentTab(mPreviousTabIndex);
                    ApplicationUtils.showToast(this, R.string.toast_login_failed);
                }
                break;

            default:
                break;
        */}
    }


    /* (non-Javadoc)
     * @see app.ui.FragmentCallback#onFragmentCallback(android.support.v4.app.Fragment, int, android.os.Bundle)
     */
    @Override
    public void onFragmentCallback(Fragment fragment, int id, Bundle args) {
        mTabView.setCurrentTab(1);
    }
    /* (non-Javadoc)
     * @see app.ui.widget.TabView.OnTabChangeListener#onTabChange(java.lang.String)
     */
    @Override
    public void onTabChange(String tag) {

        Log.e("tag", "onTabchange tag:" + tag);
        if (tag != null) {
            if (tag.equals("message")) {
                mPreviousTabIndex = mCurrentTabIndex;
                mCurrentTabIndex = 0;
                mTitleTextView.setText(R.string.text_tab_message);
                replaceFragment(SessionFragment.class);
                // 检查，如果没有登录则跳转到登录界面
              /*  final UserConfigManager manager = UserConfigManager.getInstance();
                if (manager.getId() <= 0) {
                    startActivityForResult(new Intent(this, LoginActivity.class),
                            BaseActivity.REQUEST_OK_LOGIN);
                }*/
            }else if ("service".equals(tag)) {
                mPreviousTabIndex = mCurrentTabIndex;
                mCurrentTabIndex = 1;
                mTitleTextView.setText(R.string.text_tab_service);
                replaceFragment(ServiceFragment.class);
            } else if (tag.equals("personal")) {
                mPreviousTabIndex = mCurrentTabIndex;
                mCurrentTabIndex = 2;
                mTitleTextView.setText(R.string.text_tab_profile);
                replaceFragment(ProfileFragment.class);
                // 检查，如果没有登录则跳转到登录界面
              /*  final UserConfigManager manager = UserConfigManager.getInstance();
                if (manager.getId() <= 0) {
                    startActivityForResult(new Intent(this, LoginActivity.class),
                            BaseActivity.REQUEST_OK_LOGIN);
                }*/
            } else if (tag.equals("settings")) {
                mPreviousTabIndex = mCurrentTabIndex;
                mCurrentTabIndex = 3;
                mTitleTextView.setText(R.string.text_tab_setting);
                replaceFragment(SettingFragment.class);
                // 检查，如果没有登录则跳转到登录界面
               /* final UserConfigManager manager = UserConfigManager.getInstance();
                if (manager.getId() <= 0) {
                    startActivityForResult(new Intent(this, LoginActivity.class),
                            BaseActivity.REQUEST_OK_LOGIN);
                }*/
            }
        }
    }

    private void replaceFragment(Class<? extends Fragment> newFragment) {

        mCurrentFragment = FragmentUtils.switchFragment(mFragmentManager,
                R.id.layout_content, mCurrentFragment,
                newFragment, null, false);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN) {
            if ((System.currentTimeMillis() - exitTime) > 2000) {
                DialogUtils.showToast(this, "再按一次退出程序");
                exitTime = System.currentTimeMillis();
            } else {
                finish();
                System.exit(0);
            }
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
}

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