将数据从Fragment中的RecyclerView传递到带Glide的Activity时，应用程序崩溃

问题描述 投票：0回答：4

您好我正在尝试将数据从Fragment中的RecyclerView传递给我的活动。但应用程序崩溃了。当我尝试打开另一个活动时代码有效，所以我猜测错误是在我的Gallery.java活动中。我尝试将.asBitMap放在Gallery.java Activit中的Glide中，但它标记为错误这是我的Gallery.java

package co.quindio.sena.navigationdrawerejemplo;

import android.nfc.Tag;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;

public class Gallery extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gallery);
        getIncomingIntent();
    }
    private void getIncomingIntent(){
       if(getIntent().hasExtra("image_url")){
           String imageUrl = getIntent().getStringExtra("image_url");
           String imageName = getIntent().getStringExtra("image_name");
           setImage(imageUrl,imageName);
        }
    }
    private void setImage(String imageUrl, String imageName){
        TextView name= (TextView) findViewById(R.id.idInfo);
        ImageView image= (ImageView) findViewById(R.id.idImagen);
        Glide.with(this)


                .load(imageUrl)
                .into(image);


    }
}

这是我的适配器类

package co.quindio.sena.navigationdrawerejemplo.adapters;

import android.content.Context;
import android.content.Intent;
import android.os.Parcelable;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.HashMap;

import co.quindio.sena.navigationdrawerejemplo.Gallery;
import co.quindio.sena.navigationdrawerejemplo.R;
import co.quindio.sena.navigationdrawerejemplo.clases.PersonajeVo;
import de.hdodenhof.circleimageview.CircleImageView;

/**
 * Created by CHENAO on 13/07/2017.
 */

public class PersonajesAdapter extends RecyclerView.Adapter<PersonajesAdapter.PersonajeViewHolder>{

    ArrayList<PersonajeVo> listaPersonaje;
    private Context mContext;

    public PersonajesAdapter(Context context,ArrayList<PersonajeVo> listaPersonaje) {
        this.listaPersonaje=listaPersonaje;
        this.mContext=context;
        ArrayList<String> mImages = new ArrayList<>();
        ArrayList<String>mImageNames = new ArrayList<>();
    }

    @Override
    public PersonajeViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list,null,false);
        return new PersonajeViewHolder(view);
    }

    @Override
    public void onBindViewHolder(PersonajeViewHolder holder, final int position) {
        holder.txtNombre.setText(listaPersonaje.get(position).getNombre());
        holder.txtInformacion.setText(listaPersonaje.get(position).getInfo());
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, Gallery.class);


                intent.putExtra("image_url", (Parcelable) listaPersonaje.get(position));
                intent.putExtra("image_name", (Parcelable) listaPersonaje.get(position));
                mContext.startActivity(intent);
            }
        });
    }

    @Override
    public int getItemCount() {
        return listaPersonaje.size();
    }

    public class PersonajeViewHolder extends RecyclerView.ViewHolder {
        TextView txtNombre,txtInformacion;
        ImageView foto;

        public PersonajeViewHolder(View itemView) {
            super(itemView);
            txtNombre= (TextView) itemView.findViewById(R.id.idNombre);
            txtInformacion= (TextView) itemView.findViewById(R.id.idInfo);
            foto= (ImageView) itemView.findViewById(R.id.idImagen);
        }
    }
}
android android-recyclerview fragment android-glide
4个回答
1
投票

问题是：

你发送一个Parcelable：

intent.putExtra("image_url", (Parcelable) listaPersonaje.get(position));
                intent.putExtra("image_name", (Parcelable) listaPersonaje.get(position));

但是把它作为String

String imageUrl = getIntent().getStringExtra("image_url");
           String imageName = getIntent().getStringExtra("image_name");

所以请使用getIntent().getParcelableExtra("image_url")和getIntent().getParcelableExtra("image_name")

或发送一个字符串

intent.putExtra("image_url", listaPersonaje.get(position).getImageUrl());
                intent.putExtra("image_name",listaPersonaje.get(position).getImageName());

假设listaPersonaje项目有getImageName()和getImageUrl()方法得到"image_url"和"image_name"值

更新1如果要发送drawable，首先将其转换为字节数组

Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.your_resource);     
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos); 
byte[] b = baos.toByteArray();

并通过意图额外传递，发送：

intent.putExtra("image_url", b);

和接收者：

byte[] b = getIntent().getByteArray("image_url");

最后，用它来进行图像查看

Bitmap bmp = BitmapFactory.decodeByteArray(b, 0, b.length);

更新2如果我们有drawable，我们需要将其转换为位图

public static Bitmap drawableToBitmap (Drawable drawable) {
    Bitmap bitmap = null;

    if (drawable instanceof BitmapDrawable) {
        BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
        if(bitmapDrawable.getBitmap() != null) {
            return bitmapDrawable.getBitmap();
        }
    }

    if(drawable.getIntrinsicWidth() <= 0 || drawable.getIntrinsicHeight() <= 0) {
        bitmap = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888); // Single color bitmap will be created of 1x1 pixel
    } else {
        bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    }

    Canvas canvas = new Canvas(bitmap);
    drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    drawable.draw(canvas);
    return bitmap;
}

更新3，最后，使用上述两种方式，我们有一种方法来解决您通过意图传递drawable时的问题

   Drawable drawable = listaPersonaje.get(position).getImageUrl()
        // convert drawable to byte array
        Bitmap bitmap = drawableToBitmap(drawable);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
        byte[] b = baos.toByteArray();
        // send it
        intent.putExtra("image_url", b);
        <!----------------------------------------------->
        // receiver
        byte[] b = getIntent().getByteArray("image_url");
        // and using glide to show it 
        Glide.with(this)
                .load(b)
                .asBitmap()
                .into(imageview);
0
投票

如果您只传递image_url和image_name，则无需传递Parcelable.you只传递intent中唯一的字符串。

 Intent intent = new Intent(mContext, Gallery.class);
                intent.putExtra("image_url",listaPersonaje.get(position));
                intent.putExtra("image_name", listaPersonaje.get(position));
                mContext.startActivity(intent);

And fetch data in Gallery Activity


String imageUrl = getIntent().getStringExtra("image_url");
           String imageName = getIntent().getStringExtra("image_name");


I hope its help you.
0
投票

除了@gianhtran的回答之外，我还会在这里添加更多信息。

在bindviewholder方法中，您将通过listaPersonaje.get（position）获取PersonajeVo对象。

@Override
    public void onBindViewHolder(PersonajeViewHolder holder, final int position) {
        final PersonajeVo personajeVo = listaPersonaje.get(position);
        holder.txtNombre.setText(personajeVo.getNombre());
        holder.txtInformacion.setText(personajeVo.getInfo());
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(mContext, Gallery.class);
                intent.putExtra("image_url", personajeVo.getImageUrl());
                intent.putExtra("image_name", personajeVo.getImageName());
                mContext.startActivity(intent);
            }
        });
    }

其次，如果你想要PersonajeVo对象的所有细节，那么你可以这样说，

    Intent intent = new Intent();
    intent.putExtra("personaje_obj",personajeVo); //make sure personjeVo model class is parcelable or cast it as (Parcelable)personajeVo
    mContext.startActivity(intent);)

并将其恢复到另一个活动中，如下所示，

Intent mIntent = getIntent();
if(mIntent!=null && mIntent.hasExtra("personaje_obj"))
{
PersonajeVo personajeVo = mIntent.getParcelableExtra("personaje_obj");
}
0
投票

实际上没有必要在onBindViewHolder内部。这样做吧

 public class PersonajeViewHolder extends RecyclerView.ViewHolder {
    TextView txtNombre,txtInformacion;
    ImageView foto;
    itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
        int get = AdatperPosition();
   if(pos != RecyclerView.NO_POSITION){
   Item clickDataItem = listaPersonaje.get(position); 
   Intent intent = new Intent(mContext, Gallery.class);
   intent.putExtra("image_url", listaPersonaje.get(position));
   intent.putExtra("image_name",  listaPersonaje.get(position));
   mContext.startActivity(intent);
        }
    });
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