Android viewPager 图片从右向左滑动

Question

我想添加图片幻灯片。但不能让它从右向左滑动。（对于阿拉伯语或希伯来语等语言）

我检查了Whosebug中的几乎所有回复，但找不到明确的解决方案。

我把整个代码写在这里。

请写清楚，我不是专业人士

主要活动；

package com.manishkpr.viewpagerimagegallery;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;

public class MainActivity extends Activity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
    ImageAdapter adapter = new ImageAdapter(this);
    viewPager.setAdapter(adapter);


  }


}

这里是这 ImageAdapter.java;

package com.manishkpr.viewpagerimagegallery;

import android.content.Context;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

public class ImageAdapter extends PagerAdapter {
    Context context;
    private int[] GalImages = new int[] {
        R.drawable.one,
        R.drawable.two,
        R.drawable.three
    };
    ImageAdapter(Context context){
        this.context=context;
    }
    @Override
    public int getCount() {
      return GalImages.length;
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
      return view == ((ImageView) object);
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {
      ImageView imageView = new ImageView(context);
      int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_medium);
      imageView.setPadding(padding, padding, padding, padding);
      imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
      imageView.setImageResource(GalImages[position]);
      ((ViewPager) container).addView(imageView, 0);


      return imageView;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
      ((ViewPager) container).removeView((ImageView) object);
    }
  }

这是布局文件；

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

          <android.support.v4.view.ViewPager
          android:id="@+id/view_pager"
          android:layout_width="match_parent"
          android:layout_height="match_parent" />

</RelativeLayout>

Answer 1

创建布局文件pager_item.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/imageView" />
</LinearLayout>

像这样更改您的 PagerAdapter：

public class ImageAdapter extends PagerAdapter {
Context context;
private int[] GalImages = new int[] {
    R.drawable.one,
    R.drawable.two,
    R.drawable.three
};

LayoutInflater mLayoutInflater;

ImageAdapter(Context context){
    this.context=context;
    mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
  return GalImages.length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
  return view == ((LinearLayout) object);
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    View itemView = mLayoutInflater.inflate(R.layout.pager_item, container, false);

    ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);
    imageView.setImageResource(GalImages[position]);

    container.addView(itemView);

    return itemView;
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
  container.removeView((LinearLayout)object);
}
}

编辑 1：

A trick :

public class MainActivity extends Activity {


@Override
  public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(this);
viewPager.setAdapter(adapter);
viewPager.setCurrentItem(adapter.getCount()-1);

}

希望对您有所帮助:)

Answer 2

ViewPager 不支持 RTL。

对于阿拉伯语和其他语言，您必须创建自定义 ViewPager 以便从右向左滑动。

如果您不想编写代码，那么有很多可用的库，您可以使用其中之一。

1. RtlViewPager

2. RtlViewPager

Answer 3

我建议您使用 SwipeDeck 而不是使用 ViewPager，因为正如 Niranj Patel 所说，ViewPager 不支持从右到左。

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

    <com.daprlabs.cardstack.SwipeDeck
        android:id="@+id/swipe_deck"
        android:layout_width="match_parent"
        android:layout_height="480dp"
        android:padding="20dp"
        swipedeck:card_spacing="10dp"
        swipedeck:max_visible="3"
        swipedeck:render_above="true"
        swipedeck:rotation_degrees="15" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:text="Button" />

</com.daprlabs.cardstack.SwipeFrameLayout>

Answer 4

只是简单的解决方案，但并不专业

为 ViewPager

在 xml 中写入

 android:rotationY="180"

还有 veiw_item

           android:rotationY="180".

Answer 5

ViewPager2 支持 RTL 分页。来自文档：

RTL paging is enabled automatically where appropriate based on locale, but you can also manually enable RTL paging for a ViewPager2 element by setting its android:layoutDirection attribute:

<androidx.viewpager2.widget.ViewPager2
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layoutDirection="rtl" />

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