如何从网格视图将 url 图像显示到 Android Studion 中的 ViewPager 中

Question

我想将图像 URL 到网格视图中 我已经成功完成了此操作，但我无法在其上应用视图寻呼机 这是我的代码，请帮助

这是我将图像显示到 gridView 的主要活动代码

主要活动代码

package com.hazim.gallerytestapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;

import java.lang.reflect.Array;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;

public class MainActivity extends AppCompatActivity {
    GridView gridView;
    String u1;
    String u2;
    String u3;

    {
        try {
            u1 = String.valueOf(new URL("https://i.pinimg.com/originals/85/33/24/85332400fcf4cbb1ef1c526591781188.jpg"));
            u2 = String.valueOf(new URL("https://www.newhairs.net/wp-content/uploads/2020/07/ben-affleck-cool-celebrity-hairstyles.jpg"));
            u3 = String.valueOf(new URL("https://i.pinimg.com/originals/d0/63/19/d063194b4c126e16c00b014f48ae250c.jpg"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    ArrayList<String> images=new ArrayList<>(Arrays.asList(
            u1,u2,u3
    ));

    //String[] images = {u1, u2, u3};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView=findViewById(R.id.gridview);
        Image_Adapter image_adapter=new Image_Adapter(images,this);
        gridView.setAdapter(image_adapter);
        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                Intent i=new Intent(MainActivity.this, fullscreen_activity.class);
                i.putExtra("images",String.valueOf(images));
                i.putExtra("id",position);
                startActivity(i);

            }
        });

    }
}

这是用于图像片段适配器

Image_Fragment_Adapter Code


package com.hazim.gallerytestapplication;
import android.os.Bundle;
import android.util.Size;
import androidx.annotation.NonNull;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentStatePagerAdapter;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class Image_Fragments_Adapter  extends FragmentStatePagerAdapter {

    List<String> images;

    public Image_Fragments_Adapter(@NonNull FragmentManager fm, List<String> images) {
        super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
        this.images=images;
    }

    @NonNull
    @Override
    public Fragment getItem(int position) {
        image_fragment image_fragment =new image_fragment();
        Bundle b=new Bundle();
        b.putInt("image", Integer.parseInt(images.get(position)));
        image_fragment.setArguments(b) ;
        return image_fragment;
    }

    @Override
    public int getCount() {
        return images.size();
    }
}

这是用于将 gridView 图像显示为片段的图像片段

image_fragment


package com.hazim.gallerytestapplication;
import android.os.Bundle;
import androidx.fragment.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.github.chrisbanes.photoview.PhotoView;

public class image_fragment extends Fragment {

    public image_fragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View v= inflater.inflate(R.layout.image_fragment, container, false);
        PhotoView photoView=v.findViewById(R.id.photoview);
        //ImageView imageView=v.findViewById(R.id.imageView);
        Integer ImageSrc= (getArguments().getInt("image"));
        //imageView.setImageResource(ImageSrc);
        photoView.setImageResource(ImageSrc);
        return v;
    }
}

这是用于查看寻呼机图像的图像适配器代码

Image_Adapter Class Code


package com.hazim.gallerytestapplication;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

import com.squareup.picasso.Picasso;

import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class Image_Adapter extends BaseAdapter {

    List<String> ImageIds;
    Context mContext;

    public Image_Adapter(ArrayList<String> imageIds, Context mContext) {
        ImageIds = imageIds;
        this.mContext = mContext;
    }

    @Override
    public int getCount() {
        return ImageIds.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        ImageView imageView= (ImageView) convertView;
        if(imageView==null){
            imageView =new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(230,200));
            imageView.setScaleType(ImageView.ScaleType.FIT_XY);

        }
        Picasso.with(mContext).load(String.valueOf(ImageIds.get(position))).into(imageView);
        return imageView;
    }
}

这是将图像显示到 viewpager 中的片段代码

fullscreen_activity code



package com.hazim.gallerytestapplication;

import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;

import android.os.Bundle;

import java.net.URL;
import java.util.Collections;
import java.util.List;

public class fullscreen_activity extends AppCompatActivity {

    ViewPager mpager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fullscreen_activity);

        mpager=findViewById(R.id.viewpager);
        List<Integer> images=getIntent().getExtras().getIntegerArrayList("images");
        int currentImage=getIntent().getExtras().getInt("id");
        Image_Fragments_Adapter adapter=new Image_Fragments_Adapter(getSupportFragmentManager(), Collections.singletonList(String.valueOf(images)));
        mpager.setAdapter(adapter);
        mpager.setCurrentItem(currentImage);
    }
}

This Issue I am facing when i click on Grid Vie Images it Shows me This error

2021-06-21 01:00:21.065 3670-3670/com.hazim.gallerytestapplication D/AndroidRuntime: Shutting down VM
2021-06-21 01:00:21.076 3670-3670/com.hazim.gallerytestapplication E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.hazim.gallerytestapplication, PID: 3670
    java.lang.NumberFormatException: For input string: "null"
        at java.lang.Integer.parseInt(Integer.java:608)
        at java.lang.Integer.parseInt(Integer.java:643)
        at **

com.hazim.gallerytestapplication.Image_Fragments_Adapter.getItem(Image_Fragments_Adapter.java:29)

**
        at androidx.fragment.app.FragmentStatePagerAdapter.instantiateItem(FragmentStatePagerAdapter.java:179)
        at androidx.viewpager.widget.ViewPager.addNewItem(ViewPager.java:1010)
        at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1158)
        at androidx.viewpager.widget.ViewPager.populate(ViewPager.java:1092)
        at androidx.viewpager.widget.ViewPager.onMeasure(ViewPager.java:1622)
        at android.view.View.measure(View.java:22414)
        at androidx.constraintlayout.widget.ConstraintLayout$Measurer.measure(ConstraintLayout.java:792)
        at androidx.constraintlayout.solver.widgets.analyzer.BasicMeasure.measure(BasicMeasure.java:480)
        at androidx.constraintlayout.solver.widgets.analyzer.BasicMeasure.measureChildren(BasicMeasure.java:134)
        at androidx.constraintlayout.solver.widgets.analyzer.BasicMeasure.solverMeasure(BasicMeasure.java:277)
        at androidx.constraintlayout.solver.widgets.ConstraintWidgetContainer.measure(ConstraintWidgetContainer.java:119)
        at androidx.constraintlayout.widget.ConstraintLayout.resolveSystem(ConstraintLayout.java:1578)
        at androidx.constraintlayout.widget.ConstraintLayout.onMeasure(ConstraintLayout.java:1690)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6842)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:146)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6842)
        at androidx.appcompat.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:490)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6842)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6842)
        at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1514)
        at android.widget.LinearLayout.measureVertical(LinearLayout.java:806)
        at android.widget.LinearLayout.onMeasure(LinearLayout.java:685)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6842)
        at android.widget.FrameLayout.onMeasure(FrameLayout.java:185)
        at com.android.internal.policy.DecorView.onMeasure(DecorView.java:909)
        at android.view.View.measure(View.java:22414)
        at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2599)
        at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1616)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1889)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1498)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7200)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:981)
        at android.view.Choreographer.doCallbacks(Choreographer.java:793)
        at android.view.Choreographer.doFrame(Choreographer.java:723)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:967)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:192)
        at android.app.ActivityThread.main(ActivityThread.java:6892)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:556)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:875)