我试图从Feed中提取图片，但是我发现此错误可以帮助我解决这个问题。
错误：
java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:623)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:696)
at com.ultrait.cobat.FindPropertyActivity.DownloadImage(FindPropertyActivity.java:140)
at com.ultrait.cobat._09_LatestDetailed$7.run(_09_LatestDetailed.java:262)
at java.lang.Thread.run(Thread.java:841)
我的代码：
<!-- public class _06_Photos extends Activity implements ViewFactory {
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
//GUI Components
TextView tv_counter;
ImageSwitcher imageSwitcher;
Button b_play;
Button b_next;
Button b_previous;
Button b_more;
FrameLayout topFrame, bottomFrame;
//Images and Stuff
String [] str_imageURLs;
Bitmap [] bm_images;
String propertyid;
int picNum = 0;
boolean play;
boolean stop;
Handler handler;
Thread playThread;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.xl_06_photos);
handler = new Handler();
propertyid = "";
playThread = new Thread(Play);
play = false;
stop = false;
playThread.start();
str_imageURLs = new String[10];
for(int i=0; i<10;++i)
str_imageURLs[i] = "";
bm_images = new Bitmap[10];
for(int i=0; i<10;++i)
bm_images[i] = BitmapFactory.decodeResource(getResources(), R.drawable.downloading);
InitView();
Bundle extras = getIntent().getExtras();
if (extras != null) {
str_imageURLs[0] = extras.getString("img1");
str_imageURLs[1] = extras.getString("img2");
str_imageURLs[2] = extras.getString("img3");
str_imageURLs[3] = extras.getString("img4");
str_imageURLs[4] = extras.getString("img5");
str_imageURLs[5] = extras.getString("img6");
str_imageURLs[6] = extras.getString("img7");
str_imageURLs[7] = extras.getString("img8");
str_imageURLs[8] = extras.getString("img9");
str_imageURLs[9] = extras.getString("img10");
}
for(int i=0; i<9; i++)
System.out.println(str_imageURLs[i]);
new Thread(new Runnable() {
public void run() {
for(int i=0; i<9; ++i)
{
try{
bm_images[i] = FindPropertyActivity.DownloadImage(str_imageURLs[i]);
}
catch(Exception e){
System.out.println("Image" + i + " not downloaded - " + e);
}
try{
if(bm_images[i] == null){
System.out.println("Bitmap " + i + " is null");
bm_images[i] = BitmapFactory.decodeResource(getResources(), R.drawable.download_error);
}
if(picNum == i)
handler.post(SetPic);
}
catch(Exception e){
System.out.println("PicNum null/visiablity" + i + " not setCorrectly - " + e);
}
}
System.gc();
}
}).start();
}
private void InitView(){
handler.post(SetPic);
tv_counter = (TextView)findViewById(R.id.photo_tv_counter);
imageSwitcher = (ImageSwitcher)findViewById(R.id.photo_imageSwitcher);
imageSwitcher.setFactory(this);
topFrame = (FrameLayout)findViewById(R.id.photo_topFrame);
bottomFrame = (FrameLayout)findViewById(R.id.photo_bottomFrame);
final GestureDetector gestureDetector = new GestureDetector(new MyGestureDetector());
imageSwitcher.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
gestureDetector.onTouchEvent(event);
return true;
}
});
b_play = (Button)findViewById(R.id.photo_b_play);
if(play){
b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_pause));
topFrame.setVisibility(View.INVISIBLE);
bottomFrame.setVisibility(View.INVISIBLE);
}
else{
b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_play));
}
b_play.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Drawable background = v.getBackground();
background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
v.setBackgroundDrawable(background);
} else if (event.getAction() == MotionEvent.ACTION_UP) {
Drawable background = v.getBackground();
background.setColorFilter(null);
v.setBackgroundDrawable(background);
if(play){
play = false;
b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_play));
}
else{
play = true;
b_play.setBackgroundDrawable(getResources().getDrawable(R.drawable.button_pause));
topFrame.setVisibility(View.INVISIBLE);
bottomFrame.setVisibility(View.INVISIBLE);
}
}
return false;
}
});
b_previous = (Button)findViewById(R.id.photo_b_previous);
b_previous.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Drawable background = v.getBackground();
background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
v.setBackgroundDrawable(background);
} else if (event.getAction() == MotionEvent.ACTION_UP) {
Drawable background = v.getBackground();
background.setColorFilter(null);
v.setBackgroundDrawable(background);
PreviousPic();
}
return false;
}
});
b_next = (Button)findViewById(R.id.photo_b_next);
b_next.setOnTouchListener(new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN) {
Drawable background = v.getBackground();
background.setColorFilter(0xFF7A7A7A, PorterDuff.Mode.MULTIPLY);
v.setBackgroundDrawable(background);
} else if (event.getAction() == MotionEvent.ACTION_UP) {
Drawable background = v.getBackground();
background.setColorFilter(null);
v.setBackgroundDrawable(background);
NextPic();
}
return false;
}
});
}
public void onDestroy(){
super.onDestroy();
stop = true;
}
private final Runnable SetPic = new Runnable() {
public void run() {
//iv_activity.setVisibility(View.INVISIBLE);
Drawable d =new BitmapDrawable(bm_images[picNum]);
imageSwitcher.setImageDrawable(d);
System.out.println("Pic Set");
tv_counter.setText("" + (picNum+1) + "/5");
}
};
private final Runnable Play = new Runnable() {
public void run() {
while(!stop){
try{
Thread.sleep(3000);
handler.post(new Runnable() {
public void run() {
if(play)
NextPic();
}
});
}
catch(Exception e){
System.out.println("Play Error - " + e);
}
}
}
};
protected void NextPic(){
try{
picNum++;
if(picNum > 9)
picNum = 0;
tv_counter.setText("" + (picNum+1) + "/10");
imageSwitcher.setInAnimation(this, R.anim.slide_in_left ); // added
imageSwitcher.setOutAnimation(this, R.anim.slide_out_left); // added
Drawable d =new BitmapDrawable(bm_images[picNum]);
imageSwitcher.setImageDrawable(d);
System.out.println("Next Pic");
}
catch(Exception e){
System.out.println("Next Fail " + e);
//imageSwitcher.setImageResource(R.drawable.download_error);
imageSwitcher.setImageDrawable(null);
}
}
protected void PreviousPic(){
picNum--;
if(picNum < 0)
picNum = 9;
tv_counter.setText("" + (picNum+1) + "/10");
try{
imageSwitcher.setInAnimation(this, R.anim.slide_in_right ); // added
imageSwitcher.setOutAnimation(this, R.anim.slide_out_right); // added
Drawable d =new BitmapDrawable(bm_images[picNum]);
imageSwitcher.setImageDrawable(d);
System.out.println("Previous Pic");
}
catch(Exception e){
System.out.println("Previous Fail " + e);
//imageSwitcher.setImageResource(R.drawable.download_error);
imageSwitcher.setImageDrawable(null);
}
}
protected void ChangeBarVisibles(){
if(topFrame.isShown()){
topFrame.setVisibility(View.INVISIBLE);
bottomFrame.setVisibility(View.INVISIBLE);
}
else{
topFrame.setVisibility(View.VISIBLE);
bottomFrame.setVisibility(View.VISIBLE);
}
}
public View makeView()
{
ImageView imageView = new ImageView(this);
imageView.setBackgroundColor(0xFF000000);
imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);
imageView.setLayoutParams(new
ImageSwitcher.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT));
return imageView;
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
try {
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//Toast.makeText(SelectFilterActivity.this, "Left Swipe", Toast.LENGTH_SHORT).show();
NextPic();
//return true;
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//Toast.makeText(SelectFilterActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
PreviousPic();
//return true;
}
} catch (Exception e) {
// nothing
}
return true;
}
public boolean onSingleTapUp(MotionEvent e){
if(e.getAction() == MotionEvent.ACTION_UP){
ChangeBarVisibles();
}
return true;
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
setContentView(R.layout.xl_06_photos);
InitView();
}
} -->
FindPropertyActivity：
//从互联网上下载图像的公共静态方法
public static Bitmap DownloadImage(String URL){
Bitmap bmImg = null;
URL myFileUrl =null;
try {
myFileUrl= new URL(URL);
} catch (Exception e) {
//e.printStackTrace();
System.out.println(e);
}
try {
HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bmImg = BitmapFactory.decodeStream(is);
}
catch(Exception e){
System.out.println(e);
}
return bmImg;
}
public static Bitmap DownloadImage2(String URL){
Bitmap bmImg = null;
URL myFileUrl =null;
try {
myFileUrl= new URL(URL);
} catch (Exception e) {
//e.printStackTrace();
System.out.println(e);
}
try {
HttpURLConnection conn= (HttpURLConnection)myFileUrl.openConnection();
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
BitmapFactory.Options options=new BitmapFactory.Options();
options.inSampleSize = 7;
bmImg=BitmapFactory.decodeStream(is,null,options);
//bmImg = BitmapFactory.decodeStream(is);
}
catch(Exception e){
System.out.println(e);
}
return bmImg;
}
答案 0 :(得分：1)
位图确实使用了大量的RAM，OOM很常见。除了以上所有建议的解决方案，你应该添加android：largeHeap =＆＃34; true＆＃34;在AndroidManifest.xml中的标记内。使用此标记，Android可为您的应用程序提供更多内存并修复一些最常见的问题。这是一种解决方法，而不是最佳解决方案，如果可能的话，更好的选择是如何修复实施。
答案 1 :(得分：0)
您要解码的图像必须很重。通常，当位图被解码到内存中而不小心忽略它们的大小时，会抛出此错误。 在解码时，您需要指定位图选项（解码参数高度，宽度等）。
请找到解决方案。 http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
答案 2 :(得分：0)
我个人使用杰克沃顿的毕加索图书馆。这是一个很好的方法，可以在一行中加载您的图像并管理缓存，转换，下载等。
以下是下载图书馆的链接：http://square.github.io/picasso/
您需要的所有代码是：
Picasso.with(context).load("http://yourimage.jpg").into(yourImageView);
你应该尝试一下，我希望它可以帮助你：）