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​​