我想我有内存泄漏。 我有一个使用相机的列表活动....现在只在拍照... 但我猜一些列表膨胀会导致一些内存泄漏...... 我想我错过了一些资源释放（猜测图像......）
我找不到它。
真的需要一些帮助。
以下是课程： 列表活动
package org.BJ.Food4All.Activities.NewRecipe;
import org.BJ.Food4All.R;
import org.BJ.Food4All.Recipe;
import org.BJ.Food4All.Recipe.Instruction;
import org.BJ.Food4All.Activities.RecipeBook.RecipeInstructionsListViewAdapter;
import org.BJ.Food4All.Activities.RecipeBook.SharedData;
import org.BJ.Food4All.utils.CameraUtil;
import org.BJ.Food4All.utils.ImageUploadItem;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.EditText;
public class Instructions extends ListActivity implements OnClickListener
{
private final static String mTAG = "Instructions";
private EditText mInstructionEditText = null;
private RecipeInstructionsListViewAdapter mListViewAdapter = null;
private Recipe mEditRecipe = PrivateResources.GetRecipe();
private CameraUtil mCameraUtil = new CameraUtil( this );
private int mSelectedEntryIndex = -1;
@Override
protected void onCreate( Bundle savedInstanceState )
{
super.onCreate(savedInstanceState);
setContentView( R.layout.new_recipe_instruction_tab );
mInstructionEditText = (EditText)findViewById(R.id.newRecipeInstructionEditTextId);
View addInstructionButton = findViewById( R.id.naddInstructionButtonId );
// Sanity check
if( mInstructionEditText == null ||
addInstructionButton == null )
{
Log.e( mTAG, "NULL pointers");
// secure exit
finish();
}
// Set up click listeners for all the buttons
addInstructionButton.setOnClickListener( this );
mListViewAdapter = new RecipeInstructionsListViewAdapter( this,
R.layout.recipes_instruction_list_single_view_entry,
mEditRecipe.GetInstructions() );
setListAdapter( mListViewAdapter );
registerForContextMenu( getListView() );
}
public void onClick( View v )
{
switch( v.getId() )
{
case R.id.naddInstructionButtonId:
AddInstructionToRecipe( v );
break;
default:
Log.e( mTAG, "Invalid ID:" + v.getId() );
// secure exit
finish();
}
}
private void AddInstructionToRecipe( View v )
{
String instructionText = mInstructionEditText.getText().toString();
if( instructionText == null )
{
return;
}
Instruction newInstruction = new Instruction( mEditRecipe.GetInstructions().size() + 1, // Index
instructionText, // The instruction
null,
true );
if( mEditRecipe.AddInstruction( newInstruction ) != true )
{
// TODO - ERROR
}
else
{
mListViewAdapter.notifyDataSetChanged();
}
}
/*
* (non-Javadoc)
* @see android.app.Activity#onCreateContextMenu(android.view.ContextMenu, android.view.View, android.view.ContextMenu.ContextMenuInfo)
*/
@Override
public void onCreateContextMenu( ContextMenu menu,
View v,
ContextMenuInfo menuInfo)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.instructions_ctx_menu, menu);
super.onCreateContextMenu( menu,
v,
menuInfo );
}
/*
* (non-Javadoc)
* @see android.app.Activity#onContextItemSelected(android.view.MenuItem)
*/
@Override
public boolean onContextItemSelected(MenuItem item)
{
super.onContextItemSelected(item);
AdapterView.AdapterContextMenuInfo menuInfo;
menuInfo = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
mSelectedEntryIndex = menuInfo.position;
switch( item.getItemId() )
{
case R.id.deleteId:
mEditRecipe.RemoveInstruction( mSelectedEntryIndex );
mListViewAdapter.notifyDataSetChanged();
return true;
case R.id.takePictureId:
mCameraUtil.TakePicture();
return true;
}
return false;
}
/*
* (non-Javadoc)
* @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
*/
@Override
protected void onActivityResult( int requestCode,
int resultCode,
Intent data )
{
String imageLocation = mCameraUtil.onActivityResult( requestCode,
resultCode,
data );
// TODO - switch to parameter passed in the intent!!!! like TakePicture( index );
mEditRecipe.GetInstructions().get( mSelectedEntryIndex ).SetInstructionImageLocation( imageLocation );
mSelectedEntryIndex = -1;
// Update the listviewitem with the picture
mListViewAdapter.notifyDataSetChanged();
}
}
适配器：
package org.BJ.Food4All.Activities.RecipeBook;
import java.util.ArrayList;
import org.BJ.Food4All.R;
import org.BJ.Food4All.Recipe.Instruction;
import org.BJ.Food4All.utils.GlobalDefs;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.net.Uri;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
public class RecipeInstructionsListViewAdapter extends ArrayAdapter<Instruction>
{
private Context mContext;
private ArrayList<Instruction> mItems;
private LayoutInflater mInflater;
public RecipeInstructionsListViewAdapter( Context context,
int textViewResourceId,
ArrayList<Instruction> items)
{
super( context,
textViewResourceId,
items );
mContext = context;
mItems = items;
mInflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView( int position,
View convertView,
ViewGroup parent )
{
ViewHolder holder = new ViewHolder();
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.recipes_instruction_list_single_view_entry, null);
}
if( super.getItem(position) != null )
{
holder.instructionIndex = (TextView) convertView.findViewById( R.id.listUp_RecipeInstructionNumberTextBoxId );
holder.instructionText = (TextView) convertView.findViewById( R.id.listUp_RecipeInstructioTextTextBoxId );
holder.instructionImage = (ImageView)convertView.findViewById( R.id.listUp_RecipeInstructionImageViewId );
Typeface tf = Typeface.createFromAsset(mContext.getAssets(), "Eras_Bold.ttf");
holder.instructionIndex.setTypeface(tf);
holder.instructionIndex.setTextSize(30);
holder.instructionIndex.setTextColor( GlobalDefs.GetHeadlineColor() );
holder.instructionIndex.setText( Integer.toString(mItems.get(position).getIndex() ) );
tf = Typeface.createFromAsset(mContext.getAssets(), "Arial.ttf");
holder.instructionText.setTypeface(tf);
holder.instructionText.setTextSize(14);
holder.instructionText.setTextColor( Color.BLACK );
holder.instructionText.setText( mItems.get(position).getText() );
String imageLocation = mItems.get(position).GetInstructionImageLocation();
if( imageLocation != null )
{
holder.instructionImage.setImageURI( Uri.parse( imageLocation ) );
holder.instructionImage.setVisibility( View.VISIBLE );
}
else
{
holder.instructionImage.setVisibility( View.GONE );
}
convertView.setTag(holder);
convertView.setLayoutParams( new ListView.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
}
else
{
}
return convertView;
}
@Override
public boolean isEnabled(int position)
{
return true;
}
static class ViewHolder
{
TextView instructionIndex;
TextView instructionText;
ImageView instructionImage;
}
}
相机工具：
package org.BJ.Food4All.utils;
import java.io.File;
import org.BJ.Food4All.DB.DBManager;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
//import android.widget.ImageView;
import android.widget.Toast;
public class CameraUtil
{
private static final String mTAG = "CameraUtil";
private static final int PICK_IMAGE = 1;
private static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 2;
private Activity mParentActivity = null;
private String mFileName = null; // Storage filename
// private Uri mImageUri = null; // mImageUri is the current activity attribute, define and save it for later usage (also in onSaveInstanceState)
private Bitmap mBitmap = null;
// private ImageView mImageView = null;
private DBManager mDBManager = null;
public CameraUtil( Activity parentActivity )
{
mParentActivity = parentActivity;
mDBManager = new DBManager( parentActivity );
}
/**
* Used by the camera button - for taking a new picture
*/
public void TakePicture()
{
mFileName = mDBManager.GetCurrentImageFilename() + ".jpg";
ContentValues contentValues = new ContentValues();
contentValues.put( MediaStore.Images.Media.TITLE, mFileName );
contentValues.put( MediaStore.Images.Media.DESCRIPTION, "Image capture by camera" ); // TODO- update description for recipe name description
// mImageUri = mParentActivity.getContentResolver().insert(
// MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
// contentValues );
//create new Camera Intent
Intent intent = new Intent( MediaStore.ACTION_IMAGE_CAPTURE );
intent.putExtra( MediaStore.EXTRA_OUTPUT, Uri.fromFile(getImageFile( mFileName )));//mImageUri );
intent.putExtra( MediaStore.EXTRA_VIDEO_QUALITY, 1 );
try
{
mParentActivity.startActivityForResult( intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE );
}
catch( Exception e )
{
Toast.makeText( mParentActivity.getApplicationContext(),
"Error while starting Camera!",
Toast.LENGTH_LONG ).show();
Log.e( mTAG, "Failed to start camera" );
Log.e( mTAG, e.getMessage(), e );
}
}
/**
*
* @param requestCode
* @param resultCode
* @param data
*/
public String onActivityResult(int requestCode, int resultCode, Intent data)
{
String fileManagerString = null;
String selectedImagePath = null;
switch( requestCode )
{
case PICK_IMAGE:
// Used if we want to choose a picture from the gallery
if( resultCode == Activity.RESULT_OK )
{
Uri selectedImageUri = data.getData();
String filePath = null;
try
{
// OI FILE Manager
fileManagerString = selectedImageUri.getPath();
// MEDIA GALLERY
selectedImagePath = getPath( selectedImageUri );
if( selectedImagePath != null )
{
filePath = selectedImagePath;
}
else if( fileManagerString != null )
{
filePath = fileManagerString;
}
else
{
Toast.makeText( mParentActivity.getApplicationContext(),
"Unknown path",
Toast.LENGTH_LONG ).show();
Log.e( mTAG, "Unknown image path");
}
if( filePath != null )
{
DecodeFile( filePath );
}
else
{
mBitmap = null;
}
}
catch( Exception e )
{
Toast.makeText( mParentActivity.getApplicationContext(),
"Internal error",
Toast.LENGTH_LONG ).show();
Log.e( mTAG, e.getMessage(), e);
}
}
break;
case CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE:
if( resultCode == Activity.RESULT_OK )
{
// Uri selectedImageUri = mImageUri;
String filePath = null;
try
{
// OI FILE Manager
fileManagerString = mFileName;//selectedImageUri.getPath();
// MEDIA GALLERY
// selectedImagePath = mFileName;//getPath( selectedImageUri );
//GlobalData.setUploadedImagePath(selectedImagePath);
// TODO - for uploading the image
// Add image to the recipe images
// ImageUploadItem uploadItem = new ImageUploadItem( selectedImagePath );
// GlobalData.imageUploads.add(uploadItem);
// Get image path on the image
// if( selectedImagePath != null )
// {
// filePath = selectedImagePath;
// }
// else if( fileManagerString != null )
// {
filePath = fileManagerString;
// }
// else
// {
//
// Toast.makeText( mParentActivity.getApplicationContext(),
// "Unknown path",
// Toast.LENGTH_LONG ).show();
//
// Log.e( mTAG, "Unknown image path" );
// }
if( filePath != null )
{
String p = getImageFile( mFileName ).getPath();
DecodeFile( p );//filePath );
}
else
{
mBitmap = null;
}
}
catch( Exception e )
{
Toast.makeText( mParentActivity.getApplicationContext(),
"Internal error",
Toast.LENGTH_LONG ).show();
Log.e( mTAG, e.getMessage(), e);
}
}
break;
default:
return null;
}
// TODO Here is where the image is received from either the camera or the gallery and is in the async task
// TODO to go the next activity
return getImageFile( mFileName ).getPath();//mFileName;//selectedImagePath;
}
/**
*
* @param uri
* @return
*/
private String getPath( Uri uri )
{
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = mParentActivity.managedQuery( uri,
projection,
null,
null,
null );
if( cursor != null )
{
// HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
// THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
int column_index = cursor.getColumnIndexOrThrow( MediaStore.Images.Media.DATA );
cursor.moveToFirst();
return cursor.getString( column_index );
}
else
{
return null;
}
}
/**
*
* @param filePath
*/
private void DecodeFile( String filePath )
{
// Decode image size
BitmapFactory.Options bitmapOptions = new BitmapFactory.Options();
bitmapOptions.inJustDecodeBounds = true;
BitmapFactory.decodeFile( filePath, bitmapOptions );
// The new size we want to scale to
final int REQUIRED_SIZE = 1024;
// Find the correct scale value. It should be the power of 2.
int width_tmp = bitmapOptions.outWidth;
int height_tmp = bitmapOptions.outHeight;
int scale = 1;
while( true )
{
if( width_tmp < REQUIRED_SIZE &&
height_tmp < REQUIRED_SIZE )
{
break;
}
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options newBitmapOptions = new BitmapFactory.Options();
newBitmapOptions.inSampleSize = scale;
mBitmap = BitmapFactory.decodeFile( filePath, newBitmapOptions );
}
/**
* Gets the picture taken by the camera - to be used in ImageView
*
* @return
*/
public Bitmap GetTakenPictureBitmap()
{
return mBitmap;
}
/**
* Get the image FILE to be used for the picture taken by the camera - from filename String
*
* @param filename - the filename String
* @return The File representing the image file
*/
private File getImageFile( final String filename )
{
//it will return /sdcard/image.tmp
final File path = new File( Environment.getExternalStorageDirectory(),
mParentActivity.getPackageName() );
if( !path.exists() )
{
path.mkdir();
}
return new File( path, filename );
}
}
答案 0 :(得分：1)
你有可能持续引用Bitmap个对象，和/或不recycle() - 在完成这些对象后立即使用它们。这导致99％的此类错误。
答案 1 :(得分：0)
由于图像太大，您无法直接为位图分配空间并且需要 减小尺寸。这样做是通过在创建位图对象之前不获取位图的数据来实现的。