Question

如何将图标存储到Blob中？
有人请帮我解决这个问题

Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
Blob b;

我试过这个::

 button1 = (Button)findViewById(R.id.button1);
       try{
       ImageView iv = (ImageView) findViewById(R.id.splashImageView);
       ImageView iv2 = (ImageView)findViewById(R.id.imageView1);

        Drawable d =iv.getBackground();
        BitmapDrawable bitDw = ((BitmapDrawable) d);
        Bitmap bitmap = bitDw.getBitmap();
        System.out.println(".....d....."+d);
        System.out.println("...bitDw...."+bitDw);
        System.out.println("....bitmap...."+bitmap);
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);

        byte[] imageInByte = stream.toByteArray();
        System.out.println("imageInByte"+imageInByte);

        String s = imageInByte.toString();
        byte[] imageInByte2 = s.getBytes();
         Bitmap btmp = convertByteArrayToBitmap(imageInByte2);
        /*iv.setImageResource(R.drawable.icon);*/

        iv2.setImageBitmap(btmp);





       }catch (Exception e) {
           e.printStackTrace();
    }



        //   i1.insertDataUser("tableName",3,"appname","pname", "versionName", 2,"s", 2121);
       /* int  a = i1.GetUserData(getApplicationContext(), "tablename",1);

        System.out.println("a is "+a);

        System.out.println(" i1.app_id"+i1.app_name);
        System.out.println(" i1.app_id"+i1.pname);
        System.out.println(" i1.app_id"+i1.version_name);
        System.out.println(" i1.app_id"+i1.versionCode);
        System.out.println(" i1.app_id"+i1.date);
        System.out.println(" i1.app_id"+i1.icon);*/




}
public static Bitmap convertByteArrayToBitmap(
        byte[] byteArrayToBeCOnvertedIntoBitMap) {

    Bitmap bitMapImage = BitmapFactory.decodeByteArray(
            byteArrayToBeCOnvertedIntoBitMap, 0,
            byteArrayToBeCOnvertedIntoBitMap.length);
    return bitMapImage;
}

Answer 1

无论如何，我看到你从Drawable转换为Bitmap，所以你可以使用它：

import android.util.Base64;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import java.io.ByteArrayOutputStream;

//use this method
private byte[] getBase64Bytes(Bitmap bitmap) {
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutputStream);
    byte[] byteArray = byteArrayOutputStream.toByteArray();
    return Base64.encode(byteArray, Base64.DEFAULT);
}

从Bitmap转换为byteArray。您可以将其作为blob存储在数据库中：

Bitmap myBitmap; //should be initialized to some value
byte[] byteArray = getBase64Bytes(myBitmap);

为了完整起见，如何再次从byteArray转换为Bitmap

 public Bitmap getImageFromBase64Blob(byte[] blob){
        byte[] byteArray = Base64.decode(blob, Base64.DEFAULT);
        Bitmap bitmap= BitmapFactory.decodeByteArray(byteArray , 0, byteArray.length);
        return bitmap;
 }

在Android中转换Blob

1 个答案: