android写一个图片选择.doc

android写一个图片选择 可以达到的效果 第一个图片的位置放照相机，点击打开照相机 其余的是显示全部存储的图片，点击一次是查看大图，长按则是每张图片出现一个checkBox，可以进行选择 下面是实例效果图 MainActivity 类 public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener, AdapterView.OnItemLongClickListener, ImageAdapter.OnImageCheckListener, View.OnClickListener { private static final int CAMERA_CODE = 12; ListFile fileList = new ArrayList(); ImageAdapter adapter; GridView gvImage; TextView tvFinish; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); //弹出对话框，加载数据 loadData(); } private void initView() { gvImage = (GridView) findViewById(R.id.gv_image); tvFinish = (TextView) findViewById(R.id.tv_finish); adapter = new ImageAdapter(this, fileList); adapter.setOnImageCheckListener(this); gvImage.setAdapter(adapter); gvImage.setOnItemClickListener(this); gvImage.setOnItemLongClickListener(this); tvFinish.setOnClickListener(this); } private ProgressDialog showProgressDialog() { //弹出对话框 ProgressDialog dialog = new ProgressDialog(this); dialog.setTitle(提示); dialog.setMessage(正在加载图片，请稍等。。。); dialog.show(); return dialog; } private void loadData() { final ProgressDialog dialog = showProgressDialog(); //开启线程 new Thread() { @Override public void run() { super.run(); //递归 //从sd卡中获取所有图片 getFile(Environment.getExternalStorageDirectory()); runOnUiThread(new Runnable() { @Override public void run() { dialog.dismiss(); adapter.notifyDataSetChanged(); } });