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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
Android用GridView排列相册,实现微信选择图片效果
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