Question

我使用this教程制作了自定义微调器，但现在我遇到了java.lang.OutOfMemoryError: Failed to allocate a 95976012 byte allocation with 16777120 free bytes and 31MB until OOM错误。我知道我应该使用位图我只是不知道如何将bitmapFactory包含在我的CustomAdapter中。我已经将我的图像压缩到小于16kb的大小并将它们放在mipmap文件夹中，因为它们是图标。我也已经尝试了

    <application
            android:largeHeap="true"
</application>

这是我的代码：

MainActivity.java

    package com.kathure.flags;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

import static android.R.attr.id;
import static android.graphics.BitmapFactory.*;
import static java.security.AccessController.getContext;

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

    String[] countryNames= {
            "Kenya" , "Malawi", "Nigeria", "Rwanda", "Tanzania", "Uganda"
    };


    int [] flags = {
            R.mipmap.kenyamin,R.mipmap.malawimin, R.mipmap.nigeriamin, R.mipmap.rwandamin, R.mipmap.tanzaniamin, R.mipmap.ugandamin
    };



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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);



        //Getting the instance of Spinner and applying OnItemSelectedListener on it
        Spinner spin = (Spinner) findViewById(R.id.simpleSpinner);
        spin.setOnItemSelectedListener(this);

        CustomAdapter customAdapter=new CustomAdapter(getApplicationContext(),flags,countryNames);
        spin.setAdapter(customAdapter);
    }


    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
        Toast.makeText(getApplicationContext(), countryNames[i], Toast.LENGTH_LONG).show();
    }

    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {

    }
}

CustomAdapter.java

package com.kathure.flags;

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

/**
 * Created by kathure on 28/09/16.
 */

public class CustomAdapter extends BaseAdapter {
    Context context;
    int flags[];
    String[] countryNames;
    LayoutInflater inflter;

    public CustomAdapter(Context applicationContext, int[] flags, String[] countryNames) {
        this.context = applicationContext;
        this.flags = flags;
        this.countryNames = countryNames;
        inflter = (LayoutInflater.from(applicationContext));
    }

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

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

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

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        view = inflter.inflate(R.layout.custom_spinner_items, null);
        ImageView icon = (ImageView) view.findViewById(R.id.imageView);
        TextView names = (TextView) view.findViewById(R.id.textView);
        icon.setImageResource(flags[i]);
        names.setText(countryNames[i]);
        return view;
    }
}

使用自定义微调器的位图

0 个答案: