<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <RelativeLayout android:id="@+id/rl_main" android:layout_width="match_parent" android:layout_height="match_parent" > <!-- 顶部 --> <RelativeLayout android:id="@+id/top_tab" android:layout_width="match_parent" android:layout_height="50dip" android:background="@color/topbar_bg" > <ImageView android:id="@+id/iv_logo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:focusable="false" android:src="@drawable/zhidao_logo" android:contentDescription="@null" /> </RelativeLayout> <!-- 底部tab --> <LinearLayout android:id="@+id/ll_bottom_tab" android:layout_width="match_parent" android:layout_height="54dp" android:layout_alignParentBottom="true" android:gravity="center_vertical" android:orientation="horizontal" android:baselineAligned="true"> <RelativeLayout android:id="@+id/rl_know" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1.0" > <ImageView android:id="@+id/iv_know" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:src="@drawable/btn_know_nor" android:contentDescription="@null"/> <TextView android:id="@+id/tv_know" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/iv_know" android:layout_centerHorizontal="true" android:text="@string/bottom_tab_know" android:textColor="@color/bottomtab_normal" android:textSize="12sp" /> </RelativeLayout> <RelativeLayout android:id="@+id/rl_want_know" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1.0" > <ImageView android:id="@+id/iv_i_want_know" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:src="@drawable/btn_wantknow_nor" android:contentDescription="@null" /> <TextView android:id="@+id/tv_i_want_know" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/iv_i_want_know" android:layout_centerHorizontal="true" android:text="@string/bottom_tab_wantknow" android:textColor="@color/bottomtab_normal" android:textSize="12sp" /> </RelativeLayout> <RelativeLayout android:id="@+id/rl_me" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1.0" > <ImageView android:id="@+id/iv_me" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:src="@drawable/btn_my_nor" android:contentDescription="@null" /> <TextView android:id="@+id/tv_me" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/iv_me" android:layout_centerHorizontal="true" android:text="@string/bottom_tab_my" android:textColor="@color/bottomtab_normal" android:textSize="12sp" /> </RelativeLayout> </LinearLayout> <!-- 内容部分, fragment切换 --> <LinearLayout android:id="@+id/content_layout" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_above="@+id/line" android:layout_below="@+id/top_tab" android:orientation="vertical" > </LinearLayout> <View android:id="@+id/line" android:layout_width="match_parent" android:layout_height="1dp" android:layout_above="@id/ll_bottom_tab" android:background="@color/line" /> </RelativeLayout> </FrameLayout>以上是布局代码,下面就介绍如何通过点击标签切换Fragment:
/** * 添加或者显示碎片 * * @param transaction * @param fragment */ private void addOrShowFragment(FragmentTransaction transaction, Fragment fragment) { if (currentFragment == fragment) return; if (!fragment.isAdded()) { // 如果当前fragment未被添加,则添加到Fragment管理器中 transaction.hide(currentFragment) .add(R.id.content_layout, fragment).commit(); } else { transaction.hide(currentFragment).show(fragment).commit(); } currentFragment = fragment; }
package com.xiaowu.bottomtab.demo; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentTransaction; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageView; import android.widget.RelativeLayout; import android.widget.TextView; /** * 主Activity * * @author wwj_748 * */ public class MainActivity extends FragmentActivity implements OnClickListener { // 三个tab布局 private RelativeLayout knowLayout, iWantKnowLayout, meLayout; // 底部标签切换的Fragment private Fragment knowFragment, iWantKnowFragment, meFragment, currentFragment; // 底部标签图片 private ImageView knowImg, iWantKnowImg, meImg; // 底部标签的文本 private TextView knowTv, iWantKnowTv, meTv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initUI(); initTab(); } /** * 初始化UI */ private void initUI() { knowLayout = (RelativeLayout) findViewById(R.id.rl_know); iWantKnowLayout = (RelativeLayout) findViewById(R.id.rl_want_know); meLayout = (RelativeLayout) findViewById(R.id.rl_me); knowLayout.setOnClickListener(this); iWantKnowLayout.setOnClickListener(this); meLayout.setOnClickListener(this); knowImg = (ImageView) findViewById(R.id.iv_know); iWantKnowImg = (ImageView) findViewById(R.id.iv_i_want_know); meImg = (ImageView) findViewById(R.id.iv_me); knowTv = (TextView) findViewById(R.id.tv_know); iWantKnowTv = (TextView) findViewById(R.id.tv_i_want_know); meTv = (TextView) findViewById(R.id.tv_me); } /** * 初始化底部标签 */ private void initTab() { if (knowFragment == null) { knowFragment = new ZhidaoFragment(); } if (!knowFragment.isAdded()) { // 提交事务 getSupportFragmentManager().beginTransaction() .add(R.id.content_layout, knowFragment).commit(); // 记录当前Fragment currentFragment = knowFragment; // 设置图片文本的变化 knowImg.setImageResource(R.drawable.btn_know_pre); knowTv.setTextColor(getResources() .getColor(R.color.bottomtab_press)); iWantKnowImg.setImageResource(R.drawable.btn_wantknow_nor); iWantKnowTv.setTextColor(getResources().getColor( R.color.bottomtab_normal)); meImg.setImageResource(R.drawable.btn_my_nor); meTv.setTextColor(getResources().getColor(R.color.bottomtab_normal)); } } @Override public void onClick(View view) { switch (view.getId()) { case R.id.rl_know: // 知道 clickTab1Layout(); break; case R.id.rl_want_know: // 我想知道 clickTab2Layout(); break; case R.id.rl_me: // 我的 clickTab3Layout(); break; default: break; } } /** * 点击第一个tab */ private void clickTab1Layout() { if (knowFragment == null) { knowFragment = new ZhidaoFragment(); } addOrShowFragment(getSupportFragmentManager().beginTransaction(), knowFragment); // 设置底部tab变化 knowImg.setImageResource(R.drawable.btn_know_pre); knowTv.setTextColor(getResources().getColor(R.color.bottomtab_press)); iWantKnowImg.setImageResource(R.drawable.btn_wantknow_nor); iWantKnowTv.setTextColor(getResources().getColor( R.color.bottomtab_normal)); meImg.setImageResource(R.drawable.btn_my_nor); meTv.setTextColor(getResources().getColor(R.color.bottomtab_normal)); } /** * 点击第二个tab */ private void clickTab2Layout() { if (iWantKnowFragment == null) { iWantKnowFragment = new IWantKnowFragment(); } addOrShowFragment(getSupportFragmentManager().beginTransaction(), iWantKnowFragment); knowImg.setImageResource(R.drawable.btn_know_nor); knowTv.setTextColor(getResources().getColor(R.color.bottomtab_normal)); iWantKnowImg.setImageResource(R.drawable.btn_wantknow_pre); iWantKnowTv.setTextColor(getResources().getColor( R.color.bottomtab_press)); meImg.setImageResource(R.drawable.btn_my_nor); meTv.setTextColor(getResources().getColor(R.color.bottomtab_normal)); } /** * 点击第三个tab */ private void clickTab3Layout() { if (meFragment == null) { meFragment = new MeFragment(); } addOrShowFragment(getSupportFragmentManager().beginTransaction(), meFragment); knowImg.setImageResource(R.drawable.btn_know_nor); knowTv.setTextColor(getResources().getColor(R.color.bottomtab_normal)); iWantKnowImg.setImageResource(R.drawable.btn_wantknow_nor); iWantKnowTv.setTextColor(getResources().getColor( R.color.bottomtab_normal)); meImg.setImageResource(R.drawable.btn_my_pre); meTv.setTextColor(getResources().getColor(R.color.bottomtab_press)); } /** * 添加或者显示碎片 * * @param transaction * @param fragment */ private void addOrShowFragment(FragmentTransaction transaction, Fragment fragment) { if (currentFragment == fragment) return; if (!fragment.isAdded()) { // 如果当前fragment未被添加,则添加到Fragment管理器中 transaction.hide(currentFragment) .add(R.id.content_layout, fragment).commit(); } else { transaction.hide(currentFragment).show(fragment).commit(); } currentFragment = fragment; } }
原文地址:http://blog.csdn.net/wwj_748/article/details/44224945