SQLite的ImageView和TextView的SimpleCursorAdapter

Question

I want to do an Phonebook, "name" Save names, "sname" Save phone, "img" to store pictures, But, the name and telephone can be displayed,iamge is stored using BASE64,Picture how to deal with?

---

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_menu);
    tv=(TextView)findViewById(R.id.textView1);
    tv1=(TextView)findViewById(R.id.textView2);
    Typeface face = Typeface.createFromAsset(getAssets(),"fonts/aaq.otf");
    tv.setTypeface(face);
    edt1=(EditText)findViewById(R.id.editText1);    
    lv = (ListView)findViewById(R.id.listView1);

    Toast a=Toast.makeText(getApplicationContext(),"Message Toast!", Toast.LENGTH_LONG);
    a.setGravity(Gravity.CENTER , 0, 0);
    a.show();
    db = openOrCreateDatabase(DB_NAME,  Context.MODE_PRIVATE, null);
    try {
        db.execSQL("DROP TABLE hotlist");
    } catch (Exception e) {
        // TODO: handle exception
    }

    cur=db.rawQuery("SELECT * FROM "+ TB_NAME, null); 
  adapter=new SimpleCursorAdapter(this, 
            R.layout.mylayout, cur, 
            FROM, 
            new int[] {R.id.textView11,R.id.textView22,R.id.imageView11}, 0);
    adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
        public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
          if (view.getId() == R.id.imageView11)
            {
            String cc=cur.getString(cur.getColumnIndexOrThrow("img"));
            byte[] aa=cc.getBytes();
            Bitmap bb=BitmapFactory.decodeByteArray(aa, 0,aa.length);
              ((ImageView)view).setImageBitmap(bb);
                    return true;}

          return false;}
    });



}

---

11-01 22:17:50.051: E/AndroidRuntime(4766): FATAL EXCEPTION: main 11-01 22:17:50.051: E/AndroidRuntime(4766): Process: com.example.electronicard, PID: 4766 11-01 22:17:50.051: E/AndroidRuntime(4766): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.electronicard/com.example.electronicard.Menu}: java.lang.IllegalArgumentException: column 'img' does not exist 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2596) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2653) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread.access$800(ActivityThread.java:156) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.os.Handler.dispatchMessage(Handler.java:102) 11-01 22:17:50.051: E/AndroidRuntime(4766 ): at android.os.Looper.loop(Looper.java:157) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread.main(ActivityThread.java:5883) 11-01 22:17:50.051: E/AndroidRuntime(4766): at java.lang.reflect.Method.invokeNative(Native Method) 11-01 22:17:50.051: E/AndroidRuntime(4766): at java.lang.reflect.Method.invoke(Method.java:515) 11-01 22:17:50.051: E/AndroidRuntime(4766): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871) 11-01 22:17:50.051: E/AndroidRuntime(4766): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:687) 11-01 22:17:50.051: E/AndroidRuntime(4766): at dalvik.system.NativeStart.main(Native Method) 11-01 22:17:50.051: E/AndroidRuntime(4766): Caused by: java.lang.IllegalArgumentException: column 'img' does not exist 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:309) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.support.v4.widget.SimpleC ursorAdapter.findColumns(SimpleCursorAdapter.java:317) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.support.v4.widget.SimpleCursorAdapter.(SimpleCursorAdapter.java:92) 11-01 22:17:50.051: E/AndroidRuntime(4766): at com.example.electronicard.Menu.onCreate(Menu.java:59) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.Activity.performCreate(Activity.java:5312) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1111) 11-01 22:17:50.051: E/AndroidRuntime(4766): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2552) 11-01 22:17:50.051: E/AndroidRuntime(4766): ... 11 more

Answer 1

Your database stores image data BASE64 encoded, you have to decode it into the equivalent byte[] data before BitmapFactory can use it. BASE64 decoding is not the same as cc.getBytes() - that just gives you the byte values of the characters in the string.

byte[] aa = Base64.decode(cc, Base64.DEFAULT);

is the correct way (maybe with a different flag ).

I would not do that every time you access the image data, storing it as already decoded binary BLOB in the database (or if data is > 100kB as actual file on SD) is far more efficient with regards to space and speed. http://androidsurya.blogspot.de/2012/11/insert-and-retrieve-image-from-sqlite.html looks like a usable example.