问题描述
我将图像从内部存储器加载到RecyclerView，开始时我成功地在另一个活动中加载了RecyclerView图像。
我想使用ViewPager，以便可以从一个图像滑动到另一个图像。我已经检查了许多有关如何执行此操作的教程，但是它们都涉及如何通过将图像保存在drawable文件夹中并创建这些图像的数组来进行操作，就像在this教程中一样。
我还检查了this，这在某种程度上是相关的，但是活动显示空白而不是某些图像。我需要有关操作方法或任何教程链接的指导。
以下是到目前为止的代码：
activity_image.XML
`<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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:background="@color/black"
tools:context=".activities.ImageActivity">
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/images_View_pager"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
/>
</RelativeLayout>`
sliding_images.XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/black">
<ImageView
android:id="@+id/image_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:scaleType="centerCrop"
/>
</RelativeLayout>
ImageActivity.java
`package com.marke.statussaver2in1.activities;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;
import androidx.viewpager2.widget.ViewPager2;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.StrictMode;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.marke.statussaver2in1.R;
import com.marke.statussaver2in1.adapters.ImageSwiperAdapter2;
import com.marke.statussaver2in1.model.StatusModel;
import com.marke.statussaver2in1.utils.MyConstants;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
public class ImageActivity extends AppCompatActivity {
ImageView imageView,saveBtn,repostBtn,shareBtn;
String image_path = "",path = "",package_name = "";
private ViewPager2 viewPager;
private ArrayList<StatusModel> list;
private ImageSwiperAdapter2 adapter2;
Intent intent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_image);
viewPager = findViewById(R.id.images_View_pager);
list = new ArrayList<>();
adapter2 = new ImageSwiperAdapter2(list,this);
viewPager.setAdapter(adapter2);
intent = getIntent();
final int pos = getIntent().getIntExtra("pos",0);
viewPager.setCurrentItem(pos);
//imageView = findViewById(R.id.imageView);
saveBtn = findViewById(R.id.btn_save);
repostBtn = findViewById(R.id.btn_repost);
shareBtn = findViewById(R.id.btn_share);
path = MyConstants.APP_DIRECTORY;
package_name = "com.whatsapp";
//Ignore URI Exposure
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
/*how I loaded it prevIoUsly
if (intent != null) {
image_path = intent.getStringExtra("image");
if (image_path != null) {
Glide.with(this).load(image_path)
.into(imageView);
}
}*/
}
`
StatusModel.java
package com.marke.statussaver2in1.model;
import android.graphics.Bitmap;
import java.io.File;
public class StatusModel {
private static final String MP4 = ".mp4";
private final File file;
private Bitmap thumbnail;
private final String title,path;
private boolean isVideo;
public StatusModel(File file,String title,String path) {
this.file = file;
this.title = title;
this.path = path;
this.isVideo = file.getName().endsWith(MP4);
}
public File getFile() {
return file;
}
public Bitmap getThumbnail() {
return thumbnail;
}
public void setThumbnail(Bitmap thumbnail) {
this.thumbnail = thumbnail;
}
public String getTitle() {
return title;
}
public String getPath() {
return path;
}
public boolean isVideo() {
return isVideo;
}
public void setVideo(boolean video) {
isVideo = video;
}
}
<br>***ImageSwiperAdapter.java***<br>
package com.marke.statussaver2in1.adapters;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import com.marke.statussaver2in1.R;
import com.marke.statussaver2in1.model.StatusModel;
import java.util.ArrayList;
public class ImageSwiperAdapter extends RecyclerView.Adapter<ImageSwiperAdapter.ImageSwiper> {
private ArrayList<StatusModel> list;
private Context context;
public ImageSwiperAdapter(ArrayList<StatusModel> list,Context context) {
this.list = list;
this.context = context;
}
@NonNull
@Override
public ImageSwiper onCreateViewHolder(@NonNull ViewGroup parent,int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.sliding_images,parent,false);
return new ImageSwiper(view);
}
@Override
public void onBindViewHolder(@NonNull ImageSwiper holder,int position) {
Glide.with(context.getApplicationContext())
.load(list.get(position).getPath())
.into(holder.imageView);
}
@Override
public int getItemCount() {
return list.size();
}
public class ImageSwiper extends RecyclerView.ViewHolder {
private ImageView imageView;
public ImageSwiper(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.image_view);
}
}
}
解决方法
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