学习例子，包括用CursorLoader与SimpleCursorAdapter结合加载本地照片 还有模仿微店的界面 package com.cntysoft.alllocalimage;
import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.provider.MediaStore; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.view.View; import android.widget.GridView; import android.widget.ImageView;
public class MainActivity extends FragmentActivity implements LoaderManager.LoaderCallbacks{
private GridView gridView= null; private SimpleCursorAdapter simpleCursorAdapter = null; private static final String[] STORE_IMAGES ={MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID }; @Override protected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); gridView =(GridView)findViewById(R.id.gridView1); simpleCursorAdapter = new SimpleCursorAdapter(this, R.layout.griditem_addpic, null, STORE_IMAGES, new int[]{R.id.imageView1}, 0 ); simpleCursorAdapter.setViewBinder(new ImageBinder()); gridView.setAdapter(simpleCursorAdapter); getSupportLoaderManager().initLoader(0,null,this)} @Override public Loader<Cursor> onCreateLoader(int id, Bundle args){CursorLoader cursorLoader = new CursorLoader( MainActivity.this, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, STORE_IMAGES, null, null, null ); return cursorLoader} @Override public void onLoadFinished(Loader<Cursor> loader, Cursor data){simpleCursorAdapter.swapCursor(data)} @Override public void onLoaderReset(Loader<Cursor> loader){simpleCursorAdapter.swapCursor(null)} private class ImageBinder implements SimpleCursorAdapter.ViewBinder{@Override public boolean setViewValue(View view, Cursor cursor, int columnIndex){String pathImage = cursor.getString(columnIndex); Bitmap bitmap= BitmapFactory.decodeFile(pathImage); ((ImageView)view).setImageBitmap(bitmap); return true} } }