安卓开发调用系统图片库
移动开发
2018-05-13 10:44:40
阅读次数: 2
在android中,如何从图库gallary中挑选图片呢,其实很简单,步骤如下
1) 设计一个imageview,用来显示图库选出来的图片
Java代码
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <ImageView
- android:id="@+id/imgView"
- android:layout_width="fill_parent"
- android:layout_weight="1" android:layout_height="wrap_content"></ImageView>
- <Button
- android:layout_height="wrap_content"
- android:text="Load Picture"
- android:layout_width="wrap_content"
- android:id="@+id/buttonLoadPicture"
- android:layout_weight="0"
- android:layout_gravity="center"></Button>
- </LinearLayout>
-
-
复制代码
2) 学习如何在按键中调出gallary,其实也就是intent了,如下
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(i, RESULT_LOAD_IMAGE);
3) 然后在onActivityResult中对调出图库后,选定好的图片,我们要重新显示在页面的imageview中,因此代码如下:
Java代码
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- super.onActivityResult(requestCode, resultCode, data);
-
- if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
- Uri selectedImage = data.getData();
- String[] filePathColumn = { MediaStore.Images.Media.DATA };
-
- Cursor cursor = getContentResolver().query(selectedImage,
- filePathColumn, null, null, null);
- cursor.moveToFirst();
-
- int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
- String picturePath = cursor.getString(columnIndex);
- cursor.close();
-
- ImageView imageView = (ImageView) findViewById(R.id.imgView);
- imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
-
- }
-
复制代码
其中就是Uri selectedImage = data.getData();获得了图库中的图片所有数据了。
|
转载自546945802-qq-com.iteye.com/blog/1846783