OpenLocalImage

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;
    }
}

}