我想显示来自列＆＃39;图像的图像＆＃39;在＆＃39; penyakit＆＃39;来自sqlite数据库的表。该图像通过TabGambar.java显示。
我的朋友告诉我，我可以将图像的地址放在数据库中并将该图像保存为可绘制的。但我不明白它是如何运作的。我曾尝试使用字符串uri drawable但它只能显示一个图像。
以前，我一直在寻找谷歌的参考资料，并找到这么多的教程。但我仍然不知道应该添加或更改哪个部分。有人能解决我的问题吗？
这是我的作品。
TabGambar.java
public class TabGambar extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater
.inflate(R.layout.tabgambar, container, false);
configureTextView(view);
return view;
}
private void configureTextView(View view) {
// TODO Auto-generated method stub
TextView namapenyakit = (TextView) view.findViewById(R.id.namapenyakit);
ImageView gambarpenyakit = (ImageView) view.findViewById(R.id.gambarpenyakit);
Bundle b = getActivity().getIntent().getExtras();
if (b != null)
{
namapenyakit.setText(b.getString("nama_penyakit"));
String uri = "@drawable/ayam1";
int imageResource = getResources().getIdentifier(uri, null, getActivity().getPackageName());
Drawable res = getResources().getDrawable(imageResource);
gambarpenyakit.setImageDrawable(res);
}
}
}
DBAdapter.java
public class DBAdapter extends SQLiteAssetHelper {
//nama database, versi, dan nama tabel yang akan dibuat.
private static final String DATABASE_NAME = "pakarayam";
private static final int DATABASE_VERSION = 1;
private static final String tabel_gejala = "gejala";
public static final String kd_gejala = "kode_gejala";
public static final String nm_gejala = "nama_gejala";
private static final String tabel_penyakit = "penyakit";
public static final String kd_penyakit = "kode_penyakit";
public static final String nm_penyakit = "nama_penyakit";
public static final String deskripsi = "deskripsi";
public static final String solusi = "solusi";
public static final String gambar = "gambar";
private static final String tabel_rule = "rule";
public static final String kd_rule = "kode_rule";
public static final String ko_gejala = "kode_gejala";
public static final String ko_penyakit = "kode_penyakit";
public static final String nilai_mb = "nilai_mb";
public static final String nilai_md = "nilai_md";
private static DBAdapter dbInstance;
private static SQLiteDatabase db;
private DBAdapter(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public static DBAdapter getInstance(Context context)
{
if (dbInstance == null)
{
dbInstance = new DBAdapter(context);
db = dbInstance.getWritableDatabase();
}
return dbInstance;
}
@Override
public synchronized void close()
{
super.close();
if (dbInstance != null)
{
dbInstance.close();
}
}
public ArrayList<Gejala> getAllGejala()
{
ArrayList<Gejala> listGejala = new ArrayList<Gejala>();
Cursor cursor = db.query(tabel_gejala, new String[] {kd_gejala, nm_gejala
}, null, null, null, null, nm_gejala);
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
Gejala gejala = new Gejala();
gejala.setNama_gejala(cursor.getString(cursor
.getColumnIndexOrThrow(nm_gejala)));
gejala.setKode_gejala(cursor.getString(cursor
.getColumnIndexOrThrow(kd_gejala)));
listGejala.add(gejala);
} while (cursor.moveToNext());
}
return listGejala;
}
public List<Gejala> Search(String Nama_gejala)
{
List<Gejala> listGejala = new ArrayList<Gejala>();
Cursor cursor = db.query(tabel_gejala, new String[] {
kd_gejala,
nm_gejala },
nm_gejala + " like ?", new String[] {"%"+ Nama_gejala +"%"}, null, null, null, null);
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
Gejala gejala = new Gejala();
gejala.setNama_gejala(cursor.getString(cursor
.getColumnIndexOrThrow(nm_gejala)));
listGejala.add(gejala);
} while (cursor.moveToNext());
}
return listGejala;
}
public List<Penyakit> getAllPenyakit()
{
List<Penyakit> listPenyakit = new ArrayList<Penyakit>();
Cursor cursor = db.query(tabel_penyakit, new String[] {kd_penyakit, nm_penyakit, deskripsi, solusi, gambar
}, null, null, null, null, nm_penyakit);
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
Penyakit penyakit = new Penyakit();
penyakit.setNama_penyakit(cursor.getString(cursor
.getColumnIndexOrThrow(nm_penyakit)));
penyakit.setDeskripsi(cursor.getString(cursor
.getColumnIndexOrThrow(deskripsi)));
penyakit.setSolusi(cursor.getString(cursor
.getColumnIndexOrThrow(solusi)));
penyakit.setGambar(cursor.getString(cursor
.getColumnIndexOrThrow(gambar)));
listPenyakit.add(penyakit);
} while (cursor.moveToNext());
}
return listPenyakit;
}
public List<Penyakit> Searching (String Nama_penyakit)
{
List<Penyakit> listPenyakit = new ArrayList<Penyakit>();
Cursor cursor = db.query(tabel_penyakit, new String[] {
kd_penyakit,
nm_penyakit,
deskripsi,
solusi,
gambar},
nm_penyakit + " like ?", new String[] {"%"+ Nama_penyakit +"%"}, null, null, null, null);
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
Penyakit penyakit = new Penyakit();
penyakit.setNama_penyakit(cursor.getString(cursor
.getColumnIndexOrThrow(nm_penyakit)));
penyakit.setDeskripsi(cursor.getString(cursor
.getColumnIndexOrThrow(deskripsi)));
penyakit.setSolusi(cursor.getString(cursor
.getColumnIndexOrThrow(solusi)));
penyakit.setGambar(cursor.getString(cursor
.getColumnIndexOrThrow(gambar)));
listPenyakit.add(penyakit);
} while (cursor.moveToNext());
}
return listPenyakit;
}
public double getMB(/*int kode_rule,*/ String kode_gejala)
{
/*
Cursor cursor = db.query(tabel_rule, new String[]
{kd_rule, ko_gejala, ko_penyakit, nilai_mb, nilai_md
}, ko_gejala + " like ?", new String[] {"%"+ kode_gejala +"%"},
null, null, null, null);
double mb = 0;
cursor.moveToFirst();
mb = cursor.getDouble(cursor.getColumnIndexOrThrow(nilai_mb));
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
mb = cursor.getDouble(cursor.getColumnIndexOrThrow(nilai_mb));
} while (cursor.moveToNext());
}
*/
Cursor cursor = db.query(tabel_rule, new String[] {
kd_rule,
ko_gejala,
ko_penyakit,
nilai_mb,
nilai_md
}, ko_gejala + " = '"+kode_gejala+"'", null, null, null, null, null);
double mb = 0;
if(cursor != null){
cursor.moveToFirst();
while(!cursor.isAfterLast()){
mb = cursor.getDouble(3);
}
}
return mb;
}
public double getMD(/*int kode_rule,*/ String kode_gejala)
{
Cursor cursor = db.query(tabel_rule, new String[] {
kd_rule,
ko_gejala,
ko_penyakit,
nilai_mb,
nilai_md
}, ko_gejala + " = '"+kode_gejala+"'", null, null, null, null, null);
double md = 0;
// cursor.moveToFirst();
// md = cursor.getDouble(cursor.getColumnIndexOrThrow(nilai_md));
/*
if (cursor.getCount() >= 1)
{
cursor.moveToFirst();
do
{
md = cursor.getDouble(cursor.getColumnIndexOrThrow(nilai_md));
} while (cursor.moveToNext());
}
*/
if(cursor != null){
cursor.moveToFirst();
md = cursor.getDouble(cursor.getColumnIndexOrThrow(nilai_md));
System.out.print(nilai_md);
}
return md;
}
}
答案 0 :(得分：0)
我不确定这里的具体细节，但基本上，如果你想在你的数据库中存储图像，你必须将信息存储为字节的'blob'。
当您从DB和位图读取时，您需要在字节和位图之间进行转换，当您想要写入数据库时，需要在字节之间进行转换。
URI通常用于来自设备存储的文件或服务器/网站上的某个文件等。
如果这是您正在寻找的，并且您想要更详细的帮助，请告诉我，我可以提供更多信息。