以下是我的错误的日志：
03-08 13:20:36.193: E/AndroidRuntime(9486): FATAL EXCEPTION: main
03-08 13:20:36.193: E/AndroidRuntime(9486): java.lang.RuntimeException: Unable to resume activity {com.example.camtest1/com.example.camtest1.MainActivity}: android.database.StaleDataException: Attempted to access a cursor after it has been closed.
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2639)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2667)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1279)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.os.Handler.dispatchMessage(Handler.java:99)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.os.Looper.loop(Looper.java:137)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.main(ActivityThread.java:4935)
03-08 13:20:36.193: E/AndroidRuntime(9486): at java.lang.reflect.Method.invokeNative(Native Method)
03-08 13:20:36.193: E/AndroidRuntime(9486): at java.lang.reflect.Method.invoke(Method.java:511)
03-08 13:20:36.193: E/AndroidRuntime(9486): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
03-08 13:20:36.193: E/AndroidRuntime(9486): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
03-08 13:20:36.193: E/AndroidRuntime(9486): at dalvik.system.NativeStart.main(Native Method)
03-08 13:20:36.193: E/AndroidRuntime(9486): Caused by: android.database.StaleDataException: Attempted to access a cursor after it has been closed.
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.BulkCursorToCursorAdaptor.throwIfCursorIsClosed(BulkCursorToCursorAdaptor.java:64)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.BulkCursorToCursorAdaptor.requery(BulkCursorToCursorAdaptor.java:133)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.CursorWrapper.requery(CursorWrapper.java:186)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.Activity.performRestart(Activity.java:5246)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.Activity.performResume(Activity.java:5272)
03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2629)
03-08 13:20:36.193: E/AndroidRuntime(9486): ... 10 more
我无法确定代码出错的地方。以下是我尝试从三维处理完成后从Gallery中捕获或选择图片的代码：
import java.io.ByteArrayOutputStream;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
String picturePath;
private static int RESULT_LOAD_IMAGE = 1;
private static final int PICK_FROM_GALLERY = 2;
int CAMERA_PIC_REQUEST = 1337;
Bitmap thumbnail = null;
private static final int OG=4;
private static final int CAMERA_IMAGE_CAPTURE = 0;
Uri u;
ImageView imgview;
//int z=0;
String z=null;
byte b[];
String largeImagePath = "";
Uri uriLargeImage;
Uri uriThumbnailImage;
Cursor myCursor;
public void imageCam(Bitmap thumbnail){
Bitmap photo = thumbnail;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 70, bos);
b = bos.toByteArray();
ImageView imageview = (ImageView)findViewById(R.id.imageView1);
// Bitmap bt=Bitmap.createScaledBitmap(photo, 200, 400, false);
imageview.setImageBitmap(photo);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button)findViewById(R.id.button1);
bt.setOnClickListener(onBTN);
if( savedInstanceState != null ) {
//if()
Bitmap Zatang;
String B1 = savedInstanceState .getString("message");
Toast.makeText(this, "SavedYeah"+B1, Toast.LENGTH_LONG).show();
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inSampleSize = OG;
// thumbnail = (BitmapFactory.decodeFile(picturePath));
Zatang = BitmapFactory.decodeFile((B1), opts);
System.gc();
if(Zatang != null){
Toast.makeText(this, "Success Zatang"+B1, Toast.LENGTH_LONG).show();
imageCam(Zatang);
}
String B12 = savedInstanceState .getString("Gallerymessage");
if(B12 != null){
Toast.makeText(this, "Recreated on Gallery", Toast.LENGTH_LONG).show();
BitmapFactory.Options opts1 = new BitmapFactory.Options();
opts.inSampleSize = OG;
// thumbnail = (BitmapFactory.decodeFile(picturePath));
thumbnail = BitmapFactory.decodeFile((B12), opts1);
System.gc();
imageCam(thumbnail);
}
}
}
private View.OnClickListener onBTN = new View.OnClickListener(){
public void onClick(View v){
openNewGameDialog();
}
};
String []B = {"Camera", "Gallery"};
private void openNewGameDialog(){
new AlertDialog.Builder(this).setItems(B,new DialogInterface.OnClickListener(){
public void onClick(DialogInterface dialoginterface,int i){
if(i==0){
String BX1 = android.os.Build.MANUFACTURER;
if(BX1.equalsIgnoreCase("samsung")){
Toast.makeText(getApplicationContext(), "Device man"+BX1, Toast.LENGTH_LONG).show();
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_IMAGE_CAPTURE);
}
else {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);
}
}
else if (i==1){
// Intent in = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
// startActivityForResult(in, RESULT_LOAD_IMAGE);
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, RESULT_LOAD_IMAGE);
}
}
})
.show();
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==CAMERA_IMAGE_CAPTURE && resultCode==Activity.RESULT_OK){
// Describe the columns you'd like to have returned. Selecting from the Thumbnails location gives you both the Thumbnail Image ID, as well as the original image ID
String[] projection = {
MediaStore.Images.Thumbnails._ID, // The columns we want
MediaStore.Images.Thumbnails.IMAGE_ID,
MediaStore.Images.Thumbnails.KIND,
MediaStore.Images.Thumbnails.DATA};
String selection = MediaStore.Images.Thumbnails.KIND + "=" + // Select only mini's
MediaStore.Images.Thumbnails.MINI_KIND;
String sort = MediaStore.Images.Thumbnails._ID + " DESC";
//At the moment, this is a bit of a hack, as I'm returning ALL images, and just taking the latest one. There is a better way to narrow this down I think with a WHERE clause which is currently the selection variable
myCursor = this.managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projection, selection, null, sort);
long imageId = 0l;
long thumbnailImageId = 0l;
String thumbnailPath = "";
try{
myCursor.moveToFirst();
imageId = myCursor.getLong(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.IMAGE_ID));
thumbnailImageId = myCursor.getLong(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID));
thumbnailPath = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA));
}
finally{
myCursor.close();
}
//Create new Cursor to obtain the file Path for the large image
String[] largeFileProjection = {
MediaStore.Images.ImageColumns._ID,
MediaStore.Images.ImageColumns.DATA
};
String largeFileSort = MediaStore.Images.ImageColumns._ID + " DESC";
myCursor = this.managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, largeFileProjection, null, null, largeFileSort);
largeImagePath = "";
try{
myCursor.moveToFirst();
//This will actually give yo uthe file path location of the image.
largeImagePath = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA));
}
finally{myCursor.close();}
// These are the two URI's you'll be interested in. They give you a handle to the actual images
uriLargeImage = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(imageId));
uriThumbnailImage = Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, String.valueOf(thumbnailImageId));
// I've left out the remaining code, as all I do is assign the URI's to my own objects anyways...
// Toast.makeText(this, ""+largeImagePath, Toast.LENGTH_LONG).show();
// Toast.makeText(this, ""+uriLargeImage, Toast.LENGTH_LONG).show();
// Toast.makeText(this, ""+uriThumbnailImage, Toast.LENGTH_LONG).show();
if(largeImagePath != null ){
Toast.makeText(this, "LARGE YES"+largeImagePath, Toast.LENGTH_LONG).show();
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inSampleSize = OG;
// thumbnail = (BitmapFactory.decodeFile(picturePath));
thumbnail = BitmapFactory.decodeFile((largeImagePath), opts);
System.gc();
if(thumbnail != null){
Toast.makeText(this, "Try Without Saved Instance", Toast.LENGTH_LONG).show();
imageCam(thumbnail);
}
}if(uriLargeImage != null){
Toast.makeText(this, ""+uriLargeImage, Toast.LENGTH_LONG).show();
}if(uriThumbnailImage != null){
Toast.makeText(this, ""+uriThumbnailImage, Toast.LENGTH_LONG).show();
}
}
if( requestCode == 1337 && resultCode== RESULT_OK){
Bundle extras = data.getExtras();
// if (extras!=null){
if (extras.keySet().contains("data") ){
BitmapFactory.Options options = new BitmapFactory.Options();
// options.inSampleSize = 1;
// options.inPurgeable = true;
// options.inInputShareable = true;
thumbnail = (Bitmap) extras.get("data");
// image(thumbnail);
if (thumbnail != null){
Toast.makeText(this, "YES Thumbnail", Toast.LENGTH_LONG).show();
BitmapFactory.Options opt = new BitmapFactory.Options();
// options.inSampleSize = 1;
// options.inPurgeable = true;
// options.inInputShareable = true;
thumbnail = (Bitmap) extras.get("data");
imageCam(thumbnail);
}
}else{
Uri imageURI = getIntent().getData();
ImageView imageview = (ImageView)findViewById(R.id.imageView1);
imageview.setImageURI(imageURI);
if(imageURI != null){
Toast.makeText(this, "YES Image Uri", Toast.LENGTH_LONG).show();
}
// Toast.makeText(CreateProfile.this, "Picture NOt taken", Toast.LENGTH_LONG).show();
}
super.onActivityResult(requestCode, resultCode, data);
}
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data){
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inSampleSize = OG;
// thumbnail = (BitmapFactory.decodeFile(picturePath));
thumbnail = BitmapFactory.decodeFile((picturePath), opts);
System.gc();
imageCam(thumbnail);
}
else
{
// imgview.setBackgroundResource(R.drawable.bbtb);
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString("message",largeImagePath );
outState.putString("Gallerymessage",picturePath );
}
}
答案 0 :(得分：0)
我遇到了同样的问题，并且发现在使用相机意图的某些设备/ API级别上，正在调用onDestroy（）。在我的onDestroy中，我正如你通常那样关闭游标和数据库。
您可以通过检查数据库是否为.open和cursor == null来解决此问题： onActivityResult或onResume然后在需要时重新打开和更新游标。
if (!database.isOpen() || database==null) {
patternsdb helper = new patternsdb(main.this);
database = helper.getWritableDatabase();
}