java - Android java - 为2个或更多viewpagers制作1个ImageAdapter(当前为2个viewpagers制作2个适配器)

Question

我制作了一个 ImageAdapter 类，其中包含图像和一个包含 2 个按钮的 Activity ，单击每个按钮都会打开一个带有 viewpager 的新 Activity 。两个viewpager有不同的图像，这就是我缺乏经验的地方。

我采取了简单的方法，复制了 ImageAdapter(将其命名为 ImageAdapter2)并将其链接到第二个 View 页面。 visual representation

它工作得很好，但我想做的是清理它并通过 1 个适配器和 1 个 viewpager 来完成这一切。我尝试通过 Intent getStringExtra 来完成此操作，但它无法识别 Intent 方法。这是我的类(class):

ImageAdapter(ImageAdapter2 是相同的，只是 sliderImageId 中的图像不同):

    package hr.cnzd.prepoznajmoenasilje;

    import android.content.Context;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.ImageView;
    import android.widget.LinearLayout;

    import androidx.viewpager.widget.PagerAdapter;
    import androidx.viewpager.widget.ViewPager;


    public class ImageAdapter extends PagerAdapter {

        Context mContext;

        ImageAdapter(Context context){
            this.mContext = context;
        }

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

        private int[] sliderImageId = new int[]{
                R.drawable.djeca01, R.drawable.djeca02, R.drawable.djeca03, R.drawable.djeca04, R.drawable.djeca05, R.drawable.djeca06, R.drawable.djeca07, R.drawable.djeca08
        };

        @Override
        public Object instantiateItem(ViewGroup viewGroup, int position){
            ImageView imageView = new ImageView(mContext);
            imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
                imageView.setImageResource(sliderImageId[position]);
            ((ViewPager) viewGroup).addView(imageView, 0);
            return imageView;
        }


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

        @Override
        public int getCount(){
            return  sliderImageId.length;
        }

    }

带有按钮的 Activity :

package hr.cnzd.prepoznajmoenasilje;

import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import androidx.appcompat.app.AppCompatActivity;
public class MA_Savjeti extends AppCompatActivity {
    private ImageButton imageButtonDjeca;
    private ImageButton imageButtonOdrasli;

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

        imageButtonDjeca = findViewById(R.id.imgBtnDjeca);
        imageButtonDjeca.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                openActivitySavjetiDjeca();
            }
        });

        imageButtonOdrasli = findViewById(R.id.imgBtnOdrasli);
        imageButtonOdrasli.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                openActivitySavjetiOdrasli();
            }
        });
    }

    public void openActivitySavjetiDjeca() {
        Intent intent = new Intent(this, Savjeti_Djeca.class);
        intent.putExtra("savjeti", "djeca");
        startActivity(intent);
    }

    public void openActivitySavjetiOdrasli() {
        Intent intent = new Intent(this, Savjeti_Odrasli.class);
        intent.putExtra("savjeti", "odrasli");
        startActivity(intent);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                finish();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
    public boolean onCreateOptionsMenu(Menu menu) {
        return true;
    }
}

使用viewpager的 Activity (使用viewpager的其他 Activity 具有相同的代码，只是调用ImageAdapter2)

package hr.cnzd.prepoznajmoenasilje;

import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;

public class Savjeti_Djeca extends AppCompatActivity {

    ViewPager viewPager;
    ImageAdapter imageAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.savjeti_djeca);
        viewPager = findViewById(R.id.viewpager);
        imageAdapter = new ImageAdapter(this);
        viewPager.setAdapter(imageAdapter);
    }

}

TLDR:我有 2 个 ImageAdapter 和 2 个 Viewpager，但我想通过 1 个 ImageAdapter 和 1 个 Viewpager 来实现(之前 Activity 中的 2 个按钮决定在 viewpager 上显示哪组图像)

Answer 1

使用ViewPager2而不是这种方式解决了它。