android FragmentTabHost的简单使用

在一篇博客里看到一个demo，多多少少有点问题，就拿来自己修改了下，做备份。

东西比较简单，一个Acitvity，一个layout。下面上代码。

1. FragmentTabHostActivity

package com.test.other;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.test.myapplication.R;

import java.util.List;

public class FragmentTabHostActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.layout_fragment_tab_host);

final FragmentTabHost mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);
mTabHost.addTab(mTabHost.newTabSpec("0").setIndicator("新闻"), NewsFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("1").setIndicator("音乐"), LifeFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("2").setIndicator("人生"), NewsFragment.class, null);

((Button)findViewById(R.id.btn)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List<Fragment> fragments=getSupportFragmentManager ().getFragments();
Fragment fragment=fragments.get(mTabHost.getCurrentTab());
String str=((TextView)fragment.getView().findViewById(android.R.id.button1)).getText().toString();
Toast.makeText(FragmentTabHostActivity.this,str,Toast.LENGTH_LONG).show();
}
});
}

public static class NewsFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
TextView textView = new TextView(getActivity());
textView.setId(android.R.id.button1);
textView.setText("NewsFragment");
return textView;
}
}

public static class LifeFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
TextView textView = new TextView(getActivity());
textView.setId(android.R.id.button1);
textView.setText("LifeFragment");
return textView;
}
}

}

2.layout_fragment_tab_host.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<android.support.v4.app.FragmentTabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:background="#abc123"
>

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#555aec"
android:orientation="horizontal" />

<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#ffaa476d"
/>
</LinearLayout>
</android.support.v4.app.FragmentTabHost>

<Button
android:id="@+id/btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="click" />
</LinearLayout>