利用intent打开图片库

package net.viralpatel.android.imagegalleray;

02   

03import android.app.Activity;

04import android.content.Intent;

05import android.database.Cursor;

06import android.graphics.BitmapFactory;

07import android.net.Uri;

08import android.os.Bundle;

09import android.provider.MediaStore;

10import android.view.View;

11import android.widget.Button;

12import android.widget.ImageView;

13   

14public class ImageGalleryDemoActivity extends Activity {

15   

16    private static int RESULT_LOAD_IMAGE = 1;

17   

18    @Override

19    public void onCreate(Bundle savedInstanceState) {

20        super.onCreate(savedInstanceState);

21        setContentView(R.layout.main);

22   

23        Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);

24        buttonLoadImage.setOnClickListener(new View.OnClickListener() {

25   

26            @Override

27            public void onClick(View arg0) {

28   

29                Intent i = new Intent(

30                        Intent.ACTION_PICK,

31                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

32   

33                startActivityForResult(i, RESULT_LOAD_IMAGE);

34            }

35        });

36    }

37   

38    @Override

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

40        super.onActivityResult(requestCode, resultCode, data);

41   

42        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {

43            Uri selectedImage = data.getData();

44            String[] filePathColumn = { MediaStore.Images.Media.DATA };

45   

46            Cursor cursor = getContentResolver().query(selectedImage,

47                    filePathColumn, null, null, null);

48            cursor.moveToFirst();

49   

50            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);

51            String picturePath = cursor.getString(columnIndex);

52            cursor.close();

53   

54            ImageView imageView = (ImageView) findViewById(R.id.imgView);

55            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

56   

57        }

58   

59    }

60}