android主菜单界面编写,Android tab主界面的一种实现方式

使用Fragment+FragmentManage实现tab主界面(不可滑动)

优点：

简单、易懂

代码整洁

注意：Fragment的hide和show不走任何的生命周期，hide和show的时候走

@Override

public void onHiddenChanged(boolean hidden) {

super.onHiddenChanged(hidden);

if (hidden){//相当于调用了onPause();

}else {//类似于调用了onResume(与onResume区别：第一次创建Fragment的时候没走这个方法)

}

}

效果图：

image

@Route(path = "/main/main")

public class MainActivity extends BaseActivity {

@BindView(R2.id.fl)

FrameLayout fl;

@BindView(R2.id.ll_bottom)

LinearLayout llBottom;

private Fragment mCurrentFragment;

private List fragmentList = new ArrayList<>();

@Override

protected int getLayoutResID() {

return R.layout.main_activity_main;

}

@Override

protected void init(Bundle savedInstanceState) {

for (int i = 0; i < llBottom.getChildCount(); i++) {

//fragmentList初始化

fragmentList.add(null);

final int finalI = i;

//顺便设置子View的点击事件

llBottom.getChildAt(i).setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

setTab(finalI);

}

});

}

/**

* 要写在fragmentList初始化之后

*/

setTab(0);

}

@Override

protected void initEvent() {

}

private void setTab(int pos) {

Fragment fragment = getFragment(pos);

if (fragment != null && mCurrentFragment != fragment) {

Fragment oldFragment = mCurrentFragment;

FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

if (oldFragment != null) {

transaction.hide(oldFragment);

}

if (fragment.isAdded()) {

transaction.show(fragment);

} else {

transaction.add(R.id.fl, fragment);

}

transaction.commit();

mCurrentFragment = fragment;

}

}

public Fragment getFragment(int pos) {

//使用fragmentList存储Fragment，不至于产生多个成员变量的fragment影响代码整洁度

if (fragmentList.get(pos) != null) {

return fragmentList.get(pos);

}

Fragment fragment = null;

//根据tab数量自行加减fragment

switch (pos) {

case 0:

fragment = new FirstFragment();

break;

case 1:

fragment = (Fragment) ARouter.getInstance().build(ARouterConstants.FRAGMENT_USER_USER).navigation();

break;

case 2:

fragment = (Fragment) ARouter.getInstance().build(ARouterConstants.FRAGMENT_DESIGN_DESIGN).navigation();

break;

}

fragmentList.set(pos, fragment);

return fragment;

}

}

xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

tools:context="hjt.com.module.main.activity.MainActivity">

android:id="@+id/fl"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_weight="1"/>

android:id="@+id/ll_bottom"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="horizontal">

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_weight="1"

android:background="#2a7e2a"

android:gravity="center"

android:padding="10dp"

android:text="module_main"

android:textColor="@color/white"

/>

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_weight="1"

android:background="#1cbaad"

android:gravity="center"

android:padding="10dp"

android:text="module_user"

android:textColor="@color/white"/>

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_weight="1"

android:background="#831f81"

android:gravity="center"

android:maxLines="1"

android:padding="10dp"

android:text="module_design"

android:textColor="@color/white"/>

自己新建几个Fragment添加进去就OK了