我知道这里有很多问题，但我似乎无法理解，因为我对这个记忆问题不熟悉。我有一个应用程序，允许用户从图库中选择图片或拍照，然后让他们添加评论。在一个页面中我想要至少有10张图片，但此时我只能有3张。有人可以帮我这个。我需要一步一步的代码来帮助我减少内存不足。请参阅下面的代码。
用户点击添加图片的按钮。
private void imgoption() {
// TODO Auto-generated method stub
CharSequence[] names = { "From Gallery", "From Camera" };
new AlertDialog.Builder(context)
.setTitle("Select an option for updating your Profile Picture")
.setItems(names, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int pos) {
// TODO Auto-generated method stub
if (pos == 0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, GET_GAL_IMG);
} else {
Intent i = new Intent(
android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(i, GET_CAM_IMG);
}}}
)
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).create().show();
}
之后，这就是我在这里，用户从图库或相机中选择图片，然后这是从转换URI到位图然后调整位图大小的方式。我尝试过使用ByteArrayOutStram但它似乎没有效果（主要是因为我不确定它是如何工作的）。从其他帖子我听说最好使用inSample大小，但我没有正确的方法来实现（不知道在哪里包含该代码或如何）
@Override
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
switch (requestCode) {
case 2://Camera
Log.d("take","pic");
if (resultCode == -1) {
String encodedImageString = null;
Uri selectimage=intent.getData();
String selectedImagepath = getPath(selectimage);
//Changing URI to Bitmap
Bitmap bmp = null;
try {
bmp = BitmapFactory.decodeStream(getContentResolver().openInputStream(selectimage));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//Reducing Memory
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (bmp.compress(Bitmap.CompressFormat.JPEG, 50, baos)) {
byte[] image = baos.toByteArray();
encodedImageString = Base64.encodeToString(image,
Base64.DEFAULT);
} else {
System.out.println("Compression returned false");
Log.d("Compress", "Compression returned false");
}
//Resizing Bitmap
Bitmap resizedBitmap = Bitmap.createScaledBitmap(bmp, 550, 488, false);
if(bmp!=resizedBitmap){
bmp.recycle();
bmp=null;}
//Getting INT to find out which IMG button is pressed
Intent start=getIntent();
pic=(int) start.getIntExtra("pic",pic);
if(pic==1){
Log.d("CAMERAPIC","1");
tableRow8.setVisibility(View.GONE);
tableRow9.setVisibility(View.GONE);
tableRow10.setVisibility(View.GONE);
tableRow12.setVisibility(View.GONE);
tableRow13.setVisibility(View.GONE);
tableRow14.setVisibility(View.GONE);
add2.setVisibility(View.GONE);
ImageView img1=(ImageView)findViewById(R.id.img1);
img1.setImageBitmap(resizedBitmap);
}
else if (pic==2){
Log.d("CAMERAPIC","2");
Button add1=(Button)findViewById(R.id.add1);
add1.setVisibility(View.GONE);
img2=(ImageView)findViewById(R.id.img2);
img2.setImageBitmap(resizedBitmap);
}
else if (pic==3){
Log.d("CAMERAPIC","3");
Button add2;
add2=(Button)findViewById(R.id.add2);
add1.setVisibility(View.GONE);
add2.setVisibility(View.GONE);
img3=(ImageView)findViewById(R.id.img3);
img3.setImageBitmap(resizedBitmap);
}
break;}
case 1://Selecting from Gallery
Log.d("view","pic");
if (resultCode == -1) {
String encodedImageString = null;
Uri selectimage = intent.getData();
String selectedImagepath = getPath(selectimage);
//Changing URI to Bitmap
Bitmap bmp = null;
try {
bmp =BitmapFactory.decodeStream(getContentResolver().openInputStream(selectimage));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//Reducing Memory
ByteArrayOutputStream baos = new ByteArrayOutputStream();
if (bmp.compress(Bitmap.CompressFormat.JPEG, 50, baos)) {
byte[] image = baos.toByteArray();
encodedImageString = Base64.encodeToString(image,
Base64.DEFAULT);
} else {
System.out.println("Compression returned false");
Log.d("Compress", "Compression returned false");
}
//Resizing Bitmap
Bitmap resizedBitmap = Bitmap.createScaledBitmap(bmp, 550, 488, false);
if(bmp!=resizedBitmap){
bmp.recycle();
bmp=null;}
Log.d("view","picture");
Intent start=getIntent();
pic=(int) start.getIntExtra("pic",pic);
if(pic==1){
Log.d("Gallery","1");
ImageView img1=(ImageView)findViewById(R.id.img1);
img1.setImageBitmap(resizedBitmap);
}
else if (pic==2){
Log.d("Gallery","2");
Button add1;
add1=(Button)findViewById(R.id.add1);
add1.setVisibility(View.GONE);
img2=(ImageView)findViewById(R.id.img2);
img2.setImageBitmap(resizedBitmap);
}
else if (pic==3){
Log.d("Gallery","3");
Button add2;
add2=(Button)findViewById(R.id.add2);
add2.setVisibility(View.GONE);
img3=(ImageView)findViewById(R.id.img3);
img3.setImageBitmap(resizedBitmap);
}
break;}
}
}
private String getPath(Uri selectedImage) {
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = context.getContentResolver().query(
selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
//sharedPreference is called userprofile = getting sharedpreference from filename
(see above)
SharedPreferences userprofile = getSharedPreferences(filename,0);
//SHaredPreference Class ->calling Editor --> naming Editor-->
accessing the sharedpreference name to call the sharedpreference file
SharedPreferences.Editor editor = userprofile.edit();
Intent start=getIntent();
pic=(int) start.getIntExtra("pic",pic);
if(pic==1){
//Editor->put text of edittext(variable) to save it
editor.putString("picpath1", filePath);
}else if
(pic==2){
editor.putString("picpath2", filePath);
}else if
(pic==3){
editor.putString("picpath3", filePath);
}
Log.d("saved","done");
editor.commit();
return null;
}
请帮我解决这个问题。我现在搜索这个答案超过一个月了，找不到它。因为我是新手，所以会非常欣赏一步一步的指导。谢谢你
答案 0 :(得分：0)
内存泄漏的一个原因可能是您的流处理：
你正在打开很多流，但我现在看到了关闭它们的代码。
bmp = BitmapFactory.decodeStream(
getContentResolver().openInputStream(selectimage));
ByteArrayOutputStream baos = new ByteArrayOutputStream();