这个程序应该做什么，当它启动时，当点击活动栏上的摄像头图标时，将打开一个摄像头，如果用户拍照并保存它，图片将被保存在数据库中，照片将在相机实例消失后立即在主页面上显示为ListView中的缩略图。
但是到目前为止，我一直在收到SQLiteException，说“未知错误（代码0）：nativeGetBlob中的INTEGER数据”。
每次在我进行一些调试之后运行我的代码之前，我会完全删除我的数据库，所以它会有一个新的开始。在我的数据库中实际上存储过程显然是正常的，因为我使用adb来检查我的数据库，我的命令提示符显示该表有两列，第一列是_id，第二列是images列，图片存储在.PNG的形式。 as byte []，并且id是自动增量的。
我成功获得了一个测试图像，显示为一个简单的ImageView（使用相同的SQLite存储代码）但是当我尝试在ListView上显示它时，使用ViewBinder和SimpleCursorAdapter我得到了SQLiteException。我在这里已经阅读了很多其他问题并且已经尝试了一整天的解决方案，但仍然卡住了。有谁知道如何调试我的程序？
到目前为止，这是我的代码：
MainActivity.java：
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.provider.MediaStore;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import java.io.ByteArrayOutputStream;
public class MainActivity extends ActionBarActivity {
static final int REQUEST_IMAGE_CAPTURE = 1;
SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
db = this.openOrCreateDatabase("images.db", Context.MODE_PRIVATE, null);
db.execSQL("create table if not exists tb ( _id INTEGER PRIMARY KEY AUTOINCREMENT, image blob)");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
//dispatchTakePictureIntent();
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
//Calling dispatchTakePictureIntent to start the camera activity
dispatchTakePictureIntent();
return true;
}
return super.onOptionsItemSelected(item);
}
private void dispatchTakePictureIntent() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
/*Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
ImageView thumb1 = (ImageView) findViewById(R.id.thumb1);
thumb1.setImageBitmap(imageBitmap);*/
////////////////////////////////////////////////////////////////////////
Bundle extras = data.getExtras();
Bitmap imageTaken = (Bitmap) extras.get("data");
ContentValues values = new ContentValues();
//calculate how many bytes our image consists of.
/* int bytes = imageTaken.getByteCount();
//or we can calculate bytes this way. Use a different value than 4 if you don't use 32bit images.
//int bytes = b.getWidth()*b.getHeight()*4;
ByteBuffer buffer = ByteBuffer.allocate(bytes); //Create a new buffer
imageTaken.copyPixelsToBuffer(buffer); //Move the byte data to the buffer
byte[] toValuesPut = buffer.array(); //Get the underlying array containing the data.
*/
byte[] toValuesPut = this.getBytes(imageTaken);
values.put("image", toValuesPut);
db.insert("tb", null, values);
getImage();
///////////////////////////////////////////////////////////////
db.close();
}
}
protected void getImage(){
Cursor c = db.rawQuery("select * from tb", null);
if (c.moveToNext()){
//byte[] image = c.getBlob(0);
//Bitmap bmp = BitmapFactory.decodeByteArray(image, 0, image.length);
//ImageView thumb1 = (ImageView) findViewById(R.id.thumb1);
// thumb1.setImageBitmap(bmp);
ListView listView = (ListView) findViewById(R.id.sampleListView);
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
R.layout.photos, c, new String[] { "_id", "image" }, new int[]{R.id.col1, R.id.col2});
SimpleCursorAdapter.ViewBinder viewBinder = new SimpleCursorAdapter.ViewBinder() {
public boolean setViewValue(View view, Cursor cursor,
int columnIndex) {
ImageView image = (ImageView) view;
byte[] byteArr = cursor.getBlob(columnIndex);
image.setImageBitmap(BitmapFactory.decodeByteArray(byteArr, 0, byteArr.length));
return true;
}
};
ImageView image = (ImageView) findViewById(R.id.editimage);
viewBinder.setViewValue(image, c, c.getColumnIndex("_id"));
adapter.setViewBinder(viewBinder);
listView.setAdapter(adapter);
}
}
public static byte[] getBytes(Bitmap bitmap) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 0, stream);
return stream.toByteArray();
}
}
activity_main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:weightSum="1">
<TableRow
android:id="@+id/tableRow1"
android:layout_width="793dp"
android:layout_height="wrap_content"
android:layout_weight="0.23" >
<TextView android:id="@+id/col1"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="50dp"
android:textSize="18sp"
/>
<TextView android:id="@+id/col2"
android:layout_height="fill_parent"
android:layout_width="wrap_content"
android:width="150dp"
android:textSize="18sp"
/>
<ImageView android:id="@+id/editimage"
android:clickable="true"
android:onClick="ClickHandlerForEditImage"
android:layout_width="35dp"
android:layout_height="35dp"/>
</TableRow>
</LinearLayout>
menu_main.xml：
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context=".MainActivity">
<item android:id="@+id/action_settings"
android:title="@string/action_settings"
android:icon="@drawable/camera"
android:orderInCategory="100"
app:showAsAction="ifRoom" />
</menu>
listview.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<ListView
android:id="@+id/sampleListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="10dp"
android:layout_marginTop="5dp"
android:background="@android:color/transparent"
android:cacheColorHint="@android:color/transparent"
android:divider="#CCCCCC"
android:dividerHeight="1dp"
android:paddingLeft="2dp" >
</ListView>
</LinearLayout>
photos.xml：
<?xml version="1.0" encoding="utf-8"?>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/thumb2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="24sp"/>
logcat的：
Caused by: android.database.sqlite.SQLiteException: unknown error (code 0): INTEGER data in nativeGetBlob
at android.database.CursorWindow.nativeGetBlob(Native Method)
at android.database.CursorWindow.getBlob(CursorWindow.java:403)
at android.database.AbstractWindowedCursor.getBlob(AbstractWindowedCursor.java:45)
at hiew1.is2.byuh.edu.mydailyselfie.MainActivity$1.setViewValue(MainActivity.java:133)
at hiew1.is2.byuh.edu.mydailyselfie.MainActivity.getImage(MainActivity.java:139)
at hiew1.is2.byuh.edu.mydailyselfie.MainActivity.onActivityResult(MainActivity.java:108)
at android.app.Activity.dispatchActivityResult(Activity.java:6192)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3573)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3620)
at android.app.ActivityThread.access$1300(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1352)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5257)
非常感谢
答案 0 :(得分：0)
也许您可以尝试使用此示例，而不使用ViewBinder和SimpleCursorAdapter。只需使用方法bindblob（）和Cursor：