我有三个问题:
如果我选择将image.png
存储在文件系统中,我应该将其存储在哪里res/drawable/image_1.png
或res/drawable/images/image_1.png
我要在数据库中存储图像路径。我应该把image_path
字段放在哪里。 image_1
或images/image_1
或等等。
如何从数据库获取图像路径并设置图像以查看底部的代码?你能帮我换一下吗?
assets/images/pic_1.png
images/pic_1.png
放入其中。我根据Trim的回答修正了以下代码。
非常感谢
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);
placeImage.setImageBitmap(bit);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
答案 0 :(得分:5)
您可以将图片放在“assets / images”目录下。在这种情况下,您在getAssets().open(String path)
中使用的路径将类似于“images / pic_1.png”。
您可以在活动的任何位置致电getAssets()
。
还有setImageBitmap(Bitmap bm)
方法。
您可以通过BitmapFactory.decodeFile(String path)
从路径创建位图。