java - 内存不足错误 - 优化？

Question

当我尝试导航到其他 Activity 时，我的应用程序崩溃了。我相信这是由于我的绘图中的图片数量和我的应用程序设置所致。我设置了 ListView 和 ArrayAdapter，所以我不确定为什么它使用这么多内存。有什么想法吗？

10-29 20:56:52.287 18391-18391/? E/AndroidRuntime:致命异常:main进程:com.example.android.tourguide，PID:18391java.lang.OutOfMemoryError:无法分配具有 16777216 可用字节和 24MB 的 366378124 字节分配，直到 OOM

这是我的代码:

Main Activity

package com.example.android.tourguide;

import android.support.design.widget.TabLayout;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Set the content of the activity to use the activity_main.xml layout file
    setContentView(R.layout.activity_main);

    ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
    CategoryAdapter adapter = new CategoryAdapter(this, getSupportFragmentManager());
    viewPager.setAdapter(adapter);

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);
}

}

fragment

package com.example.android.tourguide;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.RatingBar;

import java.util.ArrayList;


/**
 * A simple {@link Fragment} subclass.
 */
public class RestaurantsFragment extends Fragment {


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


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment

    View rootView = inflater.inflate(R.layout.word_list, container, false);

    final ArrayList<Information> words = new ArrayList<Information>();

    words.add(new Information(R.drawable.restaurant_1, "Rashid's House",     "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_2, "Moo Moo Cow", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_3, "Burger 7", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_4, "Mini Horse", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_5, "Prime Prime!", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_6, "Halal Cart 96", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_7, "Half Moon", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_8, "Mourice's Steakhouse", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_9, "The Rudeboy", "Description", R.drawable.five_star_rating));
    words.add(new Information(R.drawable.restaurant_10, "Meowth's Lair", "Description", R.drawable.five_star_rating));

    InformationAdapter itemsAdapter = new InformationAdapter(getActivity(), words);
    ListView listView = (ListView) rootView.findViewById(R.id.list);
    listView.setAdapter(itemsAdapter);

    return rootView;
}

}

信息 Activity

package com.example.android.tourguide;

import static android.R.attr.description;
import static com.example.android.tourguide.R.id.place;

/**
 * Created by msanli on 10/27/2016.
 */

public class Information {

private int mImageResourceId;
private String mPlace;
private String mDescription;
private int mRatingBarResourceId;

public Information(int imageResourceId, String place, String description, int ratingBarResourceId ){
    mImageResourceId = imageResourceId;
    mPlace = place;
    mDescription = description;
    mRatingBarResourceId = ratingBarResourceId;

}

public int getImageResourceId() {
    return mImageResourceId;
}

public String getPlace(){
    return mPlace;
}

public String getDescription(){
    return mDescription;
}

public int getRatingBarResourceId(){
    return mRatingBarResourceId;
}

}

信息适配器

package com.example.android.tourguide;

import android.app.Activity;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.RatingBar;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by msanli on 10/27/2016.
 */

public class InformationAdapter extends ArrayAdapter<Information> {



public InformationAdapter(Activity context, ArrayList<Information> words){
    super(context, 0, words);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View listItemView = convertView;
    if(listItemView == null) {
        listItemView = LayoutInflater.from(getContext()).inflate(
                R.layout.list_item, parent, false);
    }

    // Get the {@link Word} object located at this position in the list
    Information currentInformation = getItem(position);

    ImageView imageImageView = (ImageView) listItemView.findViewById(R.id.image_place);
    imageImageView.setImageResource(currentInformation.getImageResourceId());
    // Find the TextView in the list_item.xml layout with the ID version_name
    TextView nameTextView = (TextView) listItemView.findViewById(R.id.place);
    // Get the version name from the current Word object and
    // set this text on the name TextView
    nameTextView.setText(currentInformation.getPlace());

    // Find the TextView in the list_item.xml layout with the ID version_number
    TextView descriptionTextView = (TextView) listItemView.findViewById(R.id.description);
    // Get the version number from the current Word object and
    // set this text on the name TextView
    descriptionTextView.setText(currentInformation.getDescription());

    ImageView ratingBarImageView = (ImageView) listItemView.findViewById(R.id.ratings_bar);
    ratingBarImageView.setImageResource(currentInformation.getRatingBarResourceId());

    View textContainer = listItemView.findViewById(R.id.text_container);

    return listItemView;

}
}

类别适配器

package com.example.android.tourguide;

import android.content.Context;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

/**
 * Created by msanli on 10/29/2016.
 */

public class CategoryAdapter extends FragmentPagerAdapter {
private Context mContext;

public CategoryAdapter(Context context, FragmentManager fm){
    super(fm);
    mContext = context;
}

@Override
public Fragment getItem(int position) {
    if (position == 0) {
        return new RestaurantsFragment();
    } else if (position == 1) {
        return new ParksFragment();
    } else if (position == 2) {
        return new EntertainmentFragment();
    } else {
        return new AttractionsFragment();
    }
}

@Override
public int getCount() {
    return 4;
}

@Override
public CharSequence getPageTitle(int position) {
    if (position == 0) {
        return mContext.getString(R.string.category_restaurants);
    }else if (position == 1){
        return mContext.getString(R.string.category_parks);
    }else if (position == 2){
        return mContext.getString(R.string.category_entertainment);
    }else{
        return mContext.getString(R.string.category_attractions);
    }

}
}

Answer 1

尝试一下，在您的drawable文件夹所在的位置(app->src->main->main->res)，创建一个名为drawable-nodpi的文件夹，把你所有的图片放在那里。让我知道它是否适合您