Android用GridView排列相册，实现微信选择图片效果

许多项目都必须用到上传图片的功能，有了图片会更加精彩，最近我的项目也需要选择图片的功能，所以把我写的代码共享出来，也算是笔记吧！好，废话少说，下面看看效果图：

效果还可以，代码主要就是两个Activity剩下的都是一些辅助类，适配器什么的，首先先给大家看一下这个界面的代码

package com.example.choosephotos;

import java.io.Serializable;
import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;

public class ChoosePhotosActivity extends Activity {
	List<ImageBucket> dataList;
	GridView gridView;
	ImageBucketAdapter adapter;// 自定义的适配器
	AlbumHelper helper;
	public static final String EXTRA_IMAGE_LIST = "imagelist";
	public static Bitmap bimap;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.act_image_bucket);
		helper = AlbumHelper.getHelper();
		helper.init(getApplicationContext());
		initData();
		initView();
	}

	/**
	 * 初始化数据
	 */
	private void initData() {
		dataList = helper.getImagesBucketList(false);
		bimap=BitmapFactory.decodeResource(
				getResources(),
				R.drawable.icon_addpic_unfocused);
	}

	/**
	 * 初始化view视图
	 */
	private void initView() {
		gridView = (GridView) findViewById(R.id.gridview);
		adapter = new ImageBucketAdapter(ChoosePhotosActivity.this, dataList);
		gridView.setAdapter(adapter);

		gridView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				Intent intent = new Intent(ChoosePhotosActivity.this,
						ImageGridActivity.class);
				intent.putExtra(ChoosePhotosActivity.EXTRA_IMAGE_LIST,
						(Serializable) dataList.get(position).imageList);
				startActivityForResult(intent, 100);
				finish();
			}

		});
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if(resultCode!=Activity.RESULT_OK){
			return;
		}

		switch (requestCode) {

		case 100:
			setResult(Activity.RESULT_OK);
			finish();
			break;

		default:
			break;
		}
	}
}

下面在看看另一界面的效果：

在大家看看这个页面的代码：

package com.example.choosephotos;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import com.example.choosephotos.ImageGridAdapter.TextCallback;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;

public class ImageGridActivity extends Activity {
	public static final String EXTRA_IMAGE_LIST = "imagelist";

	List<ImageItem> dataList;
	GridView gridView;
	ImageGridAdapter adapter;
	AlbumHelper helper;
	Button bt;

	Handler mHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case 0:
				Toast.makeText(ImageGridActivity.this, "最多选择9张图片", 400).show();
				break;

			default:
				break;
			}
		}
	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.act_image_grid);
		helper = AlbumHelper.getHelper();
		helper.init(getApplicationContext());

		dataList = (List<ImageItem>) getIntent().getSerializableExtra(
				EXTRA_IMAGE_LIST);

		initView();
		bt = (Button) findViewById(R.id.bt);
		bt.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				ArrayList<String> list = new ArrayList<String>();
				Collection<String> c = adapter.map.values();
				Iterator<String> it = c.iterator();
				for (; it.hasNext();) {
					list.add(it.next());
				}

				if (Bimp.act_bool) {
					setResult(Activity.RESULT_OK);
					Bimp.act_bool = false;
				}
				for (int i = 0; i < list.size(); i++) {
					if (Bimp.bmp.size() < 9) {
						try {
							Bitmap bm=Bimp.revitionImageSize(list.get(i));
							Bimp.bmp.add(bm);

						} catch (IOException e) {
							e.printStackTrace();
						}
					}
				}

				finish();
			}

		});
	}
	private void initView() {
		gridView = (GridView) findViewById(R.id.gridview);
		gridView.setSelector(new ColorDrawable(Color.TRANSPARENT));
		adapter = new ImageGridAdapter(ImageGridActivity.this, dataList,
				mHandler);
		gridView.setAdapter(adapter);
		adapter.setTextCallback(new TextCallback() {
			public void onListen(int count) {
				bt.setText("完成" + "(" + count + ")");
			}
		});

		gridView.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				adapter.notifyDataSetChanged();
			}

		});

	}
}

这里我们判读Bimp.bmp的大小，只能让他选择9张

好了，效果实现完了，下面是源码的下载地址：

对了别忘记加权限：

 <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

源码下载