获取本地图片后，通过保存路径的方式重新加载图片的问题

private Button bt_add;

	private ImageView iv_local;

	

	private SharedPreferences sp;

	

	@Override

	public void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		

		iv_local = (ImageView) findViewById(R.id.iv_loacl);

		

		sp = getSharedPreferences("imagepath", MODE_PRIVATE);

		String path = sp.getString("path", "");

		if ("".equals(path) == false) {

			System.out.println("保存的图片路径为:"+ path);

			  try {

				ContentResolver resolver = getContentResolver();

				Uri uri = Uri.parse(path);

				Bitmap bitmap = BitmapFactory.decodeStream(resolver.openInputStream(uri));

				iv_local.setImageBitmap(bitmap);

			} catch (Exception e) {

				// TODO Auto-generated catch block

				Toast.makeText(this, "图片未找到！", Toast.LENGTH_SHORT).show();

			}

		}

		

		bt_add = (Button) findViewById(R.id.bt_add);

		bt_add.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

				Intent intent = new Intent();

				/* 开启Pictures画面Type设定为image */

				intent.setType("image/*");

				/* 使用Intent.ACTION_GET_CONTENT这个Action */

				intent.setAction(Intent.ACTION_GET_CONTENT);

				/* 取得相片后返回本画面 */

				startActivityForResult(intent, 1);

			}



		});

	}



	@Override

	protected void onActivityResult(int requestCode, int resultCode, Intent data) {

		if (resultCode == RESULT_OK) {

			//用户点击所需的图片后，返回一个uri

			Uri uri = data.getData();

			Log.e("uri", uri.toString());



			try {

				ContentResolver resolver = this.getContentResolver();

				Bitmap bitmap = BitmapFactory.decodeStream(resolver.openInputStream(uri));

				iv_local.setImageBitmap(bitmap);

	            //将得到的图片的路径保存在SharedPreferences中

				sp = getSharedPreferences("imagepath", MODE_PRIVATE);

				Editor editor = sp.edit();

				editor.putString("path", uri.toString());

				editor.commit();

				

	        }catch (IOException e) {

				Log.e("Exception", e.getMessage(), e);

			}

		}

		super.onActivityResult(requestCode, resultCode, data);

	}