Question

我正在编写代码来从库中选择图像，然后在网格视图中显示它们。我完成了代码，直到允许用户从图库中选择图像。现在我需要帮助来进一步移动它并在单独的网格视图中显示所选图像。在这里，我将我的代码附加到我所做的事情之前。谢谢。

MultiPhotoSelectActivity.java

package com.mamakar.gridviewimplementation;

import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;

import java.util.ArrayList;

/**
 * @author Paresh Mayani (@pareshmayani)
 */
public class MultiPhotoSelectActivity extends BaseActivity {

private ArrayList<String> imageUrls;
private DisplayImageOptions options;
private ImageAdapter imageAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ac_image_grid);

        //Bundle bundle = getIntent().getExtras();
        //imageUrls = bundle.getStringArray(Extra.IMAGES);

        final String[] columns = { MediaStore.Images.Media.DATA,  MediaStore.Images.Media._ID };
        final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
        Cursor imagecursor = managedQuery(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
                null, orderBy + " DESC");
    //MultiPhotoSelectActivity.imageLoader.init(ImageLoaderConfiguration.createDefault(getBaseCont‌ext()));

    ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(MultiPhotoSelectActivity.this));
    this.imageUrls = new ArrayList<String>();

    for (int i = 0; i < imagecursor.getCount(); i++) {
        imagecursor.moveToPosition(i);
        int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
        imageUrls.add(imagecursor.getString(dataColumnIndex));

        System.out.println("=====> Array path => "+imageUrls.get(i));
    }


    options = new DisplayImageOptions.Builder()
        .showStubImage(R.drawable.stub_image)
        .showImageForEmptyUri(R.drawable.image_for_empty_url)
        .cacheInMemory()
        .cacheOnDisc()
        .build();

    imageAdapter = new ImageAdapter(this, imageUrls);

    GridView gridView = (GridView) findViewById(R.id.gridview);
    gridView.setAdapter(imageAdapter);
    /*gridView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            startImageGalleryActivity(position);
        }
    });*/
}

@Override
protected void onStop() {
    imageLoader.stop();
    super.onStop();
}

public void btnChoosePhotosClick(View v){

    ArrayList<String> selectedItems = imageAdapter.getCheckedItems();
    Toast.makeText(MultiPhotoSelectActivity.this, "Total photos selected: "+selectedItems.size(), Toast.LENGTH_SHORT).show();
    Log.d(MultiPhotoSelectActivity.class.getSimpleName(), "Selected Items: " + selectedItems.toString());
}

/*private void startImageGalleryActivity(int position) {
    Intent intent = new Intent(this, ImagePagerActivity.class);
    intent.putExtra(Extra.IMAGES, imageUrls);
    intent.putExtra(Extra.IMAGE_POSITION, position);
    startActivity(intent);
}*/

public class ImageAdapter extends BaseAdapter {

    ArrayList<String> mList;
    LayoutInflater mInflater;
    Context mContext;
    SparseBooleanArray mSparseBooleanArray;

    public ImageAdapter(Context context, ArrayList<String> imageList) {
        // TODO Auto-generated constructor stub
        mContext = context;
        mInflater = LayoutInflater.from(mContext);
        mSparseBooleanArray = new SparseBooleanArray();
        mList = new ArrayList<String>();
        this.mList = imageList;

    }

    public ArrayList<String> getCheckedItems() {
        ArrayList<String> mTempArry = new ArrayList<String>();

        for(int i=0;i<mList.size();i++) {
            if(mSparseBooleanArray.get(i)) {
                mTempArry.add(mList.get(i));
            }
        }

        return mTempArry;
    }

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

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

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

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

        if(convertView == null) {
            convertView = mInflater.inflate(R.layout.row_multiphoto_item, null);
        }

        CheckBox mCheckBox = (CheckBox) convertView.findViewById(R.id.checkBox1);
        final ImageView imageView = (ImageView) convertView.findViewById(R.id.imageView1);

        imageLoader.displayImage("file://"+imageUrls.get(position), imageView, options, new SimpleImageLoadingListener() {
            @Override
            public void onLoadingComplete(Bitmap loadedImage) {
                Animation anim = AnimationUtils.loadAnimation(MultiPhotoSelectActivity.this, R.anim.fade_in);
                imageView.setAnimation(anim);
                anim.start();
            }
        });

        mCheckBox.setTag(position);
        mCheckBox.setChecked(mSparseBooleanArray.get(position));
        mCheckBox.setOnCheckedChangeListener(mCheckedChangeListener);

        return convertView;
    }

    OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            // TODO Auto-generated method stub
            mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
        }
    };
}


}

BaseActivity.java

package com.mamakar.gridviewimplementation;

import android.app.Activity;

import com.nostra13.universalimageloader.core.ImageLoader;

/**
 * @author Paresh Mayani (@pareshmayani)
 */
public abstract class BaseActivity extends Activity {

    protected ImageLoader imageLoader = ImageLoader.getInstance();

}

UILApplication.java

package com.mamakar.gridviewimplementation;

import android.app.Application;

import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

/**
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public class UILApplication extends Application {

@Override
public void onCreate() {
    super.onCreate();

    // This configuration tuning is custom. You can tune every option, you may tune some of them, 
    // or you can create default configuration by
    //  ImageLoaderConfiguration.createDefault(this);
    // method.
    ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext())
        .threadPoolSize(3)
        .threadPriority(Thread.NORM_PRIORITY - 2)
        .memoryCacheSize(1500000) // 1.5 Mb
        .denyCacheImageMultipleSizesInMemory()
        .discCacheFileNameGenerator(new Md5FileNameGenerator())
        .enableLogging() // Not necessary in common
        .build();
    // Initialize ImageLoader with configuration.
    ImageLoader.getInstance().init(config);
//  BaseActivity.imageLoader.init(ImageLoaderConfiguration.createDefault(getBaseCont‌ext()));
}
}

ac_image_grid.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <GridView
        android:id="@+id/gridview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:columnWidth="100dip"
        android:gravity="center"
        android:horizontalSpacing="4dip"
        android:numColumns="auto_fit"
        android:stretchMode="columnWidth"
        android:layout_above="@+id/button1"
        android:verticalSpacing="2dip" />

    <Button
        android:id="@+id/button1"
        android:layout_alignParentBottom="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:onClick="btnChoosePhotosClick"
        android:text="Select Photos" />

</RelativeLayout>

row_multiphoto_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:src="@mipmap/ic_launcher" />

<CheckBox
    android:id="@+id/checkBox1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/imageView1"
    android:layout_centerVertical="true"/>

Answer 1

您可以获取所选的图像路径，并且可以在包含ImageView的自定义gridView中显示。并设置图像路径。我想，这个回购会帮助你。这就是你想要的。 https://github.com/Cutta/MultipleImagePicker

从库中选择后，在网格视图中显示图像

1 个答案: