获取系统中的图片资源

public class Main extends Activity {
	private final String TAG = "org.fighter.image";
	
	private final int LOAD_IMAGE = 101;
	private Button btnLoadPicture;
	private ImageView imgView;

	private OnClickListener btnListener;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.mian);

		this.initWidget();
		this.initParam();
		this.initBtnListener();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.mian, menu);
		return true;
	}

	/*
	 * 当应用使用了startActivityForResult(Intent,int) 方法时, 执行完Intent后，回调
	 * onActivityResult 方法
	 */
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		// 如果用户选择的条件为是,则有数据返回...
		if (RESULT_OK == resultCode && requestCode == LOAD_IMAGE
				&& null != data) {
			Uri selectedImageUri = data.getData();
			Log.i(TAG, "选择图片的路径为:" + selectedImageUri.toString());
			// 列表
			String[] filePathColumn = {MediaStore.Images.Media.DATA };
			// 使用游标 指定了列表,可以加快效率
			Cursor imageData = getContentResolver().query(selectedImageUri, filePathColumn, null, null, null);
			// 将游标指向第一行
			imageData.moveToFirst();
			
			{
				// 获取列表的条数
				int rows = imageData.getCount();
				for (int i = 0; i < rows; i++) {
					Log.i(TAG,"游标中的数据" + imageData.getString(i));
				}
			}
			// 获取当前游标在的列的数据
			int columnIndex = imageData.getColumnIndex(filePathColumn[0]);
			
			String imagePath = imageData.getString(columnIndex);
			Bitmap selectedImage = BitmapFactory.decodeFile(imagePath);
			this.imgView.setImageBitmap(selectedImage);
		}
	}

	/* 初始化部件 */
	private void initWidget() {
		this.btnLoadPicture = (Button) findViewById(R.id.btnLoadPicture);
		this.imgView = (ImageView) findViewById(R.id.imgView);
	}

	/* 初始化变量 */
	private void initParam() {
		this.btnListener = new BtnOnClickListenerImpl();
	}

	private void initBtnListener() {
		this.btnLoadPicture.setOnClickListener(this.btnListener);
	}

	class BtnOnClickListenerImpl implements OnClickListener {

		@Override
		public void onClick(View v) {
			switch (v.getId()) {
			case R.id.btnLoadPicture:
				btnLoadPicture((Button) v);
				break;

			default:
				break;
			}
		}

		/*
		 * 打开图片选择器,最后选择后图片返回
		 */
		private void btnLoadPicture(Button btn) {
			Intent intent = new Intent(
					Intent.ACTION_PICK,
					android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
			startActivityForResult(intent, LOAD_IMAGE);
		}

	}
}