android-tabs - 使用支持库 v7 :21 with Toolbar in Android Developer Tools for existing project 添加滑动标签

Question

我已经阅读了此链接中的信息:Use Tab with new ToolBar (AppCompat v7-21)并对此进行了大量研究。

但问题是 SlidingTabLayout 项目正在使用 Gradle 构建文件和结构。我想使用 eclipse 添加选项卡布局。我该怎么做呢？

不过，我确实在 Android Studio 中运行了 SlidingTabLayout 项目。但是如何在 v7:21 中将选项卡添加到工具栏？

笔记:
所有这些都需要在现有项目中完成，该项目已设置所有内容并警告我 API 21 中已弃用的 API，如 ActionBar.setNavigationMode 等

Answer 1

1 .从 https://developer.android.com/samples/SlidingTabsColors/src/com.example.android.common/view/SlidingTabLayout.html 复制 SlidingTabLayout.java并将其粘贴到您的包裹中。

主事件.java

package com.example.mysliding;

import com.example.android.common.view.SlidingTabLayout;
import com.example.mysliding.SlidingTabsBasicFragment.SamplePagerAdapter;

import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

static final String LOG_TAG = "SlidingTabsBasicFragment";
private SlidingTabLayout mSlidingTabLayout;
private ViewPager mViewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment_sample);
    Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);

    mViewPager = (ViewPager) findViewById(R.id.viewpager);
    mViewPager.setAdapter(new SamplePagerAdapter());
    mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
    mSlidingTabLayout.setViewPager(mViewPager);

    /*
     * FragmentTransaction transaction =
     * getSupportFragmentManager().beginTransaction();
     * SlidingTabsBasicFragment fragment = new SlidingTabsBasicFragment();
     * transaction.replace(R.id.sample_content_fragment, fragment);
     * transaction.commit();
     */

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

class SamplePagerAdapter extends PagerAdapter {

    /**
     * @return the number of pages to display
     */
    @Override
    public int getCount() {
        return 5;
    }

    /**
     * @return true if the value returned from
     *         {@link #instantiateItem(ViewGroup, int)} is the same object
     *         as the {@link View} added to the {@link ViewPager}.
     */
    @Override
    public boolean isViewFromObject(View view, Object o) {
        return o == view;
    }

    // BEGIN_INCLUDE (pageradapter_getpagetitle)
    /**
     * Return the title of the item at {@code position}. This is important
     * as what this method returns is what is displayed in the
     * {@link SlidingTabLayout}.
     * <p>
     * Here we construct one using the position value, but for real
     * application the title should refer to the item's contents.
     */
    @Override
    public CharSequence getPageTitle(int position) {
        return "Item " + (position + 1);
    }

    // END_INCLUDE (pageradapter_getpagetitle)

    /**
     * Instantiate the {@link View} which should be displayed at
     * {@code position}. Here we inflate a layout from the apps resources
     * and then change the text view to signify the position.
     */
    @Override
    public Object instantiateItem(ViewGroup container, int position) {
        // Inflate a new layout from our resources

        View view = getLayoutInflater().inflate(R.layout.pager_item,
                container, false);
        // Add the newly created View to the ViewPager
        container.addView(view);

        // Retrieve a TextView from the inflated View, and update it's text
        TextView title = (TextView) view.findViewById(R.id.item_title);
        title.setText(String.valueOf(position + 1));

        Log.i(LOG_TAG, "instantiateItem() [position: " + position + "]");

        // Return the View
        return view;
    }

    /**
     * Destroy the item from the {@link ViewPager}. In our case this is
     * simply removing the {@link View}.
     */
    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
        Log.i(LOG_TAG, "destroyItem() [position: " + position + "]");
    }

}

}

fragment_sample.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.v7.widget.Toolbar
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/my_awesome_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" 
        android:minHeight="?attr/actionBarSize"

        app:theme="@style/ThemeOverlay.AppCompat.ActionBar">

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

            <com.example.android.common.view.SlidingTabLayout
                android:id="@+id/sliding_tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
        </LinearLayout>
    </android.support.v7.widget.Toolbar>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="0px"
        android:layout_weight="1"
        android:background="@android:color/white" />

</LinearLayout>

Pager_item.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:gravity="center">

    <TextView
          android:id="@+id/item_subtitle"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:textAppearance="?android:attr/textAppearanceLarge"
          android:text="Page:"/>

    <TextView
          android:id="@+id/item_title"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:textSize="80sp" />

</LinearLayout>