How can I set image view which stored in file system according to path in database?
I have three questions:
If I choose to store
image.png
in file system where should I store itres/drawable/image_1.png
orres/drawable/images/image_1.png
And I'm going to store path of image in database. What should I put in
image_path
field ex.image_1
orimages/image_1
or etc.How can I get path of image from database and set image to view follow my code in the bottom? Could you guys change it for me?
I already have answer
- in case storing image file in file system in
assets/images/pic_1.png
- In database, "image_path field" , you will put
images/pic_1.png
in it. - To get and set image: according to Trim's answer.
AND I have fixed the following code according to Trim's answer.
Thanks so much
placeListActivity.class
public class placeListActivity extends ListActivity {
private static MyDB mDbHelper;
String[] from = new String[] { Constants.COL_TITLE};
int[] to = new int[] {R.id.list_place_title};
private Cursor c;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDbHelper = new MyDB(this);
mDbHelper.createDatabase();
mDbHelper.open();
c = mDbHelper.getAllPlaces();
setListAdapter(new SimpleCursorAdapter(this,
R.layout.list_place, c,
from, to));
final ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
Intent i = new Intent(view.getContext(), Place.class);
i.putExtra(Constants.KEY_ID, id);
i.putExtra(Constants.COL_TITLE, c.getString(
c.getColumnIndexOrThrow(Constants.COL_TITLE)));
i.putExtra(Constants.COL_CONTENT, c.getString(
c.getColumnIndexOrThrow(Constants.COL_CONTENT)));
i.putExtra(Constants.COL_IMAGE, c.getString(
c.getColumnIndexOrThrow(Constants.COL_IMAGE)));
startActivity(i);
}
});
}
}
Place.class
public class Place extends Activity {
private TextView title;
private TextView content;
private ImageView placeImage;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.detail_place);
title = (TextView) findViewById(R.id.place_title);
content = (TextView) findViewById(R.id.place_content);
placeImage = (ImageView) findViewById(R.id.place_image);
Bundle extras = getIntent().getExtras();
if (extras != null) {
// reference XML defined views that we will touch in code
String stringTitle = extras.getString(Constants.COL_TITLE);
String stringContent = extras.getString(Constants.COL_CONTENT);
String imageID = extras.getString(Constants.COL_IMAGE);
if (title != null) {
title.setText(stringTitle);
}
if (content != null) {
content.setText(stringContent);
}
/*if (placeImage != null) {
placeImage.setImageDrawable(Drawable.createFromPath(imageID));
}*/
if (placeImage != null) {
try {
InputStream path = getAssets().open(imagePath);
Bitmap bit = BitmapFactory.decodeStream(path);
place开发者_运维知识库Image.setImageBitmap(bit);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
You can put your images under "assets/images" directory. In this case, the path that you will use in getAssets().open(String path)
will be like "images/pic_1.png".
You can call getAssets()
anywhere in your activity.
There is also a setImageBitmap(Bitmap bm)
method.
You can create bitmap from path via BitmapFactory.decodeFile(String path)
.
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