我的 ImageLoader 类-------->
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=Wall.width;
final int REQUIRED_SIZE1=Wall.height;
// final int REQUIRED_SIZE=250;
//
int width_tmp=o.outWidth, height_tmp=o.outHeight;
int scale=1;
// while(o.outWidth/scale/2>=REQUIRED_SIZE && o.outHeight/scale/2>=REQUIRED_SIZE)
//// scale*=2;
while(true){
if((width_tmp/2<REQUIRED_SIZE)||(height_tmp/2<REQUIRED_SIZE1))
break;
width_tmp/=2;
height_tmp/=2;
scale*=2;
}
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
o2.inSampleSize=scale;
o2.inJustDecodeBounds = false;
// o2.inSampleSize=2;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
我想使用图形 api 在我的应用程序中显示 facebook 墙流。
墙流包含以下内容 1) 个人资料图片 2) 名称、发布的消息、发布的图像 3) 喜欢、评论选项 我从 facebook graph api https://graph.facebook.com/me/home?access_token= "+访问令牌；
在这个我得到了 page1 的数据，我使用“分页”来获取第二页的数据，同样用于获取第三页。
但是当我尝试显示第一页时，因为我得到了更多的图像
Bitmap size exceeds VM Budget error:Out of Memory error
我想知道，其他 facebook 应用程序如何管理这个问题，我观察到他们一次只加载较少数量的记录。如果我以分页方式获取数据，如何做这些事情？
public class Wall extends Activity {
private Button btnSettings,btnLogout,btnUpdate,btnWall,btnCheckin,btnPubfinder,btnCamera;
public String accesstoken,wallres,str_likevariable="",webserv,currentweb;
protected static JSONArray jsonArray;
JSONObject jsonObject = null;
MyProgressDialog dialog;
private PullToRefreshListView listView;
ArrayList<String> msg=new ArrayList<String>();
ArrayList<String> name=new ArrayList<String>();
ArrayList<String> id=new ArrayList<String>();
ArrayList<String> objid=new ArrayList<String>();
ArrayList<String> profimg=new ArrayList<String>();
ArrayList<String> img=new ArrayList<String>();
ArrayList<String> pic=new ArrayList<String>();
ArrayList<String> comment=new ArrayList<String>();
ArrayList<String> likes=new ArrayList<String>();
ArrayList<String> weburl=new ArrayList<String>();
ArrayList<String> like_or_unlike=new ArrayList<String>();
ArrayList<String> date=new ArrayList<String>();
ImageLoader imageLoader;
Handler mHandler;
View footerView;
private int previousTotal = 0,j=0;
public static int width,height;
public boolean loading = true,isScrolling,scroll=true,boolisLoad=true,boolDialog=true,addFooter=false;
MySimpleArrayAdapter adapter;
static {
StrictMode.setThreadPolicy( new StrictMode.ThreadPolicy.Builder().permitAll().build());
}
//onCreate
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.wall);
//To get device dimensions
android.view.WindowManager w = getWindowManager();
Display d = w.getDefaultDisplay();
width = d.getWidth();
height = d.getHeight();
System.out.println(width);
System.out.println(height);
btnSettings=(Button)findViewById(R.id.settings);
btnLogout=(Button)findViewById(R.id.logout);
btnCamera=(Button)findViewById(R.id.camera);
btnUpdate=(Button)findViewById(R.id.update);
btnWall=(Button)findViewById(R.id.wall);
btnCheckin=(Button)findViewById(R.id.checkin);
btnPubfinder=(Button)findViewById(R.id.pubfinder);
ButtonListener listener=new ButtonListener();
btnSettings.setOnClickListener(listener);
btnLogout.setOnClickListener(listener);
btnUpdate.setOnClickListener(listener);
btnWall.setOnClickListener(listener);
btnCheckin.setOnClickListener(listener);
btnPubfinder.setOnClickListener(listener);
btnCamera.setOnClickListener(listener);
//access token
accesstoken=Login.mFacebook.getAccessToken();
Log.e("accesstoken",accesstoken);
//first page webservice
webserv="https://graph.facebook.com/me/home?access_token="+accesstoken;
Log.e("firstweb",webserv);
//pullToRefresh Listview
listView= (PullToRefreshListView ) findViewById(R.id.walldata);
listView.setDivider(null);
//footer view
footerView = ((LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.listfooter, null, false);
// this.mHandler = new Handler();
listView.addFooterView(footerView);
//
// this.mHandler.postDelayed(m_Runnable,5000);
SessionStore.restore(Login.mFacebook, Wall.this);
SessionEvents.removeAllAuthListener();
listView.setOnRefreshListener(new OnRefreshListener() {
// @Override
public void onRefresh() {
// Your code to refresh the list contents goes here
scroll=true; //to keep the scroll at position where it has hits the load more data
pic.clear();
id.clear();
name.clear();
msg.clear();
img.clear();
profimg.clear();
objid.clear();
comment.clear();
weburl.clear();
adapter.clear();
likes.clear();
like_or_unlike.clear();
date.clear();
addFooter=true; // to add the footer view again after removing in pullToRefresh
previousTotal = 0;
loading = true;
listView.removeFooterView(footerView);
listView.setAdapter(null);
j=0;
webserv="https://graph.facebook.com/me/home?access_token="+accesstoken;
Log.e("inpull",webserv);
System.out.println(listView.getCount());
doInBack dob=new doInBack();
dob.execute();
System.out.println(listView.getCount());
Log.e("hi","doback called");
}
});
//
listView.setOnScrollListener(new OnScrollListener() {
private int threshold = 0;
//
public void onScrollStateChanged(AbsListView view, int scrollState) {
////
if (scrollState != 0) {
isScrolling = true;
}
else {
isScrolling = false; //To load the data when the scroll is in offstate
adapter.notifyDataSetChanged();
}
}
public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount)
{
// TODO Auto-generated method stub
if (loading) {
if (totalItemCount > previousTotal) {
Log.e("in loading","in load");
loading = false;
previousTotal = totalItemCount;
}
}
if (!loading && (firstVisibleItem + visibleItemCount+2) == totalItemCount+1){
System.out.println(firstVisibleItem);
System.out.println(visibleItemCount);
System.out.println(totalItemCount);
scroll=false;
Log.v("in gridview loading more","grid load");
//
doInBack dob=new doInBack();
dob.execute();
adapter.notifyDataSetChanged();
// doback(webserv);
loading = true;
}
}
// }
});
doInBack dob=new doInBack();
dob.execute();
// doback(webserv);
Log.e("hi","doback called");
}
/
private class ButtonListener implements View.OnClickListener{
public void onClick(View v) {
if(v.equals( btnSettings)){
Intent myintent=new Intent(Wall.this,Settings.class);
startActivity(myintent);
finish();
}
else if(v.equals(btnLogout)){
try {
String res=Login.mFacebook.logout(Wall.this);
Log.e("response",res);
System.out.println(res);
System.out.println(Login.mFacebook.isSessionValid());
//if(res.equals("true"))
//{
Intent in=new Intent(Wall.this,Login.class);
startActivity(in);
finish();
//}
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else if(v.equals(btnUpdate)){
Update.i=0;
Intent myintent=new Intent(Wall.this,Update.class);
startActivity(myintent);
finish();
}
else if(v.equals(btnCamera)){
Intent myintent=new Intent(Wall.this,CameraActivity.class);
startActivity(myintent);
finish();
}
else if(v.equals(btnWall)){
// Intent myintent=new Intent(Wall.this,Wall.class);
// startActivity(myintent);
// finish();
}
else if(v.equals(btnCheckin)){
Intent myintent=new Intent(Wall.this,Checkin.class);
startActivity(myintent);
finish();
}
else if(v.equals(btnPubfinder)){
Intent myintent=new Intent(Wall.this,PubFinder.class);
startActivity(myintent);
finish();
}
}
}
class doInBack extends AsyncTask<URL, Integer, Long>
{
protected void onPreExecute()
{ if(boolDialog){
dialog=MyProgressDialog.show(Wall.this, null,null);
}
}
// currentweb= webserv;
@Override
protected Long doInBackground(URL... arg0) {
currentweb=webserv;
//
Log.e("hi","doback parsing");
try
{
// if(urlval>0){
wallres=UrltoValue.getValuefromUrl(currentweb);
Log.e("wallrespages",wallres);
}
JSONObject jobj1=new JSONObject(wallres);
JSONObject jobj2=jobj1.getJSONObject("paging");
webserv= jobj2.getString( "next");
jsonArray = jobj1.getJSONArray("data");
for(int i=0;i<jsonArray.length();i++){
jsonObject = jsonArray.getJSONObject(i);
if(jsonObject.has("message")||jsonObject.has("picture")) {
try{
// msg[j]=jsonObject.getString("message");
if(jsonObject.has("message"))
{
msg.add(jsonObject.getString("message"));
}
else{
msg.add("");
}
}
catch(Exception e){
e.printStackTrace();
}
try{
// msg[j]=jsonObject.getString("message");
if(jsonObject.has("picture"))
{
String firstpicture=jsonObject.getString("picture");
String secondpicture=firstpicture.replaceAll("_s.jpg", "_n.jpg");
Log.e("picurl",secondpicture);
pic.add(secondpicture);
}
else{
pic.add("");
}
}
catch(Exception e){
e.printStackTrace();
}
objid.add(jsonObject.getString("id"));
JSONObject jobj=jsonObject.getJSONObject("from");
name.add(jobj.getString("name"));
id.add(jobj.getString("id"));
if(jsonObject.getString("type").equals("checkin")){
name.set(i,jobj.getString("name")+" "+"is at"+" "+jsonObject.getString("name"));
}
Log.e("id",id[j]);
profimg.add("http://graph.facebook.com/"+id.get(j)+"/picture?type=square");
JSONObject commentjobj=jsonObject.getJSONObject("comments");
comment.add(commentjobj.getString("count"));
if(jsonObject.has("likes")) {
Log.e("likeornot","likre");
JSONObject likesjobj=jsonObject.getJSONObject("likes");
likes.add(likesjobj.getString("count"));
String postid=jsonObject.getString("id");
// graph_or_fql = "fql";
String query = "SELECT likes.user_likes FROM stream WHERE post_id = \'" + postid + "'";
// Log.d("finalThreadID", finalThreadID);
Bundle params = new Bundle();
params.putString("method", "fql.query");
params.putString("query", query);
// Utility.mAsyncRunner.request(null, params, new LikesListener());
String fqlResponse = Login.mFacebook.request(params);
System.out.println(fqlResponse);
JSONArray JOLikeresponse=new JSONArray(fqlResponse);
if(JOLikeresponse.length()!=0){
JSONObject JOLikeObject = JOLikeresponse.getJSONObject(0);
if ( JOLikeObject.has("likes")) {
String optlike,optlikesarray;
JSONObject optLikes=JOLikeObject;
JSONArray optLikesArray;
try{
optLikes = JOLikeObject.getJSONObject("likes");
optlike="like";
}
catch(Exception e){
optlike="unlike";
}
//
if(optlike.equals("like")){
if (optLikes.has("user_likes")) {
String getUserLikes = optLikes.getString("user_likes");
if (getUserLikes.equals("true")) {
like_or_unlike.add("Unlike");
} else if (getUserLikes.equals("false")) {
like_or_unlike.add("Like");
}
}
else {
like_or_unlike.add("Like");
}
} else {
like_or_unlike.add("Like");
}
}
//if likes object is not there in like response
else {
like_or_unlike.add("Like");
}
}
//if the like response Array length is zero
else {
like_or_unlike.add("Like");
}//FQL query object
}
//If likes are not there
else{
likes.add("0");
like_or_unlike.add("Like");
}
weburl.add(currentweb);
Log.e("comment", comment.get(j));
String getCreatedTime = jsonObject.getString("created_time");
SimpleDateFormat formatter = getDateFormat();
ParsePosition pos = new ParsePosition(0);
long then = formatter.parse(getCreatedTime, pos).getTime();
long now = new Date().getTime();
long seconds = (now - then)/1000;
long minutes = seconds/60;
long hours = minutes/60;
long days = hours/24;
String friendly = null;
long num = 0;
if (days > 0) {
num = days;
friendly = days + " day";
} else if (hours > 0) {
num = hours;
friendly = hours + " hour";
} else if (minutes > 0) {
num = minutes;
friendly = minutes + " minute";
} else if(seconds>0) {
num = seconds;
friendly = seconds + " second";
}
else{
friendly = "few seconds";
}
if (num > 1) {
friendly += "s";
}
String postTimeStamp = friendly.toLowerCase() + " ago";
Log.e("date",postTimeStamp );
date.add(postTimeStamp);
j++;
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
return null;
}
protected void onPostExecute(Long result) {
try
{ if(addFooter){
listView.addFooterView(footerView);
}
addFooter=false;
System.out.println(scroll);
if(scroll){
adapter=new MySimpleArrayAdapter(Wall.this,R.layout.wall,pic,name,msg,id,profimg,comment,objid,weburl,likes, like_or_unlike,date);
listView.setAdapter(adapter);
listView.postDelayed(new Runnable() {
// @Override
public void run() {
listView.onRefreshComplete();
}
}, 2000);
if(boolDialog){
dialog.dismiss();
}
}
else{
// adapter=new MySimpleArrayAdapter(Wall.this,R.layout.wall,pic,name,msg,id,profimg,bitmap,comment,objid,weburl);
adapter.notifyDataSetChanged();
listView.postDelayed(new Runnable() {
// @Override
public void run() {
listView.onRefreshComplete();
}
}, 2000);
}
if(boolDialog){
dialog.dismiss();
}
}
catch(Exception e)
{
e.printStackTrace();
if(boolDialog){
dialog.dismiss();
}
}
boolDialog=false;
}
}
private static SimpleDateFormat getDateFormat() {
return new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ssZ");
}
public class MySimpleArrayAdapter extends ArrayAdapter<String> {
private Activity context;
ArrayList<String> namear,msgar,idar,profimage,postimage,commentsnum,objectid,urlString,likescount,like_or_ulike,datesofpost;
TextView name1, message1,comments,commentsnumber, likesnumber,likes,dateofpost;
ImageView profimg,postimg;
ImageLoader imageLoader;
Bitmap[] bitdata;
// ViewHolder holder ;
// View rowView;
public MySimpleArrayAdapter(Activity c,int i,ArrayList<String> postpic, ArrayList<String> names,ArrayList<String> msg,ArrayList<String> id,ArrayList<String> proimg,ArrayList<String> comment,ArrayList<String> objid,ArrayList<String> web,ArrayList<String> likecount,ArrayList<String> unlike_or_like,ArrayList<String> dates) {
super(c, i, names);
Log.e("adapter","adap");
this.context = c;
this.namear = names;
this.msgar = msg;
this.idar = id;
this.profimage=proimg;
this.postimage=postpic;
// this.bitdata=bit;
this.commentsnum=comment;
this.objectid=objid;
this.urlString=web;
this.likescount=likecount;
this.like_or_ulike=unlike_or_like;
this.datesofpost=dates;
this.imageLoader = new ImageLoader(context);
}
// public View getView(final int position, View convertView, ViewGroup parent) {
//// View view;
// TextView title1,id,name1,dispdate,loc;
// ImageView image,delete,arrow;
// View view = convertView;
//// view = inflater.inflate(R.layout.myfav_row, parent, false);
// LayoutInflater inflator = context.getLayoutInflater();
// view = inflator.inflate(R.layout.myfav_row, null);
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// code to load images
View rowView=convertView ;
LayoutInflater inflator = getLayoutInflater();
rowView = inflator.inflate(R.layout.walldata, null);
name1 = (TextView) rowView.findViewById(R.id.name);
message1 = (TextView) rowView.findViewById(R.id.msg);
profimg= (ImageView) rowView.findViewById(R.id.profile_pic);
postimg= (ImageView) rowView.findViewById(R.id.picpost);
comments = (TextView) rowView.findViewById(R.id.comment);
likes = (TextView) rowView.findViewById(R.id.like);
commentsnumber = (TextView) rowView.findViewById(R.id.commentnumber);
likesnumber = (TextView) rowView.findViewById(R.id.likesnumber);
dateofpost = (TextView) rowView.findViewById(R.id.datepost);
// rowView.setTag(holder);
Log.e("user",idar.get(position));
Log.e("adapter","adap");
name1.setText(namear.get(position));
if(msgar.get(position)!=""){
message1.setText(msgar.get(position));
}
else
{
message1.setVisibility(View.GONE);
}
if(!isScrolling){
if(!postimage.get(position).equals(""))
{try{
imageLoader.DisplayImage(postimage.get(position).replace(" ", "%20"), postimg) ;
// Bitmap b= imageLoader.getBitmap(postimage.get(position));
// postimg.setImageBitmap(b);
}
catch(Exception e){
e.printStackTrace();
}
}
else
{
postimg.setVisibility(View.GONE);
}
}
try{
imageLoader.DisplayImage(profimage.get(position).replace(" ", "%20"), profimg) ;
}
catch(Exception e){
e.printStackTrace();
}
dateofpost.setText(datesofpost.get(position));
commentsnumber.setText(commentsnum.get(position));
likesnumber.setText(likescount.get(position));
likes.setText(like_or_ulike.get(position));
likes.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// if(likes.getText().toString().equals("Like")){
TextView t=(TextView)v;
TextView likescountmodify = null;
View parent = (View) t.getParent();
if (parent != null) {
likescountmodify = (TextView)parent.findViewById(R.id.likesnumber);
}
int i= Integer.parseInt(likescount.get(position));
if(like_or_ulike.get(position).equals("Like")){
Log.e("inlike","like");
like_or_ulike.set(position, "Unlike");
t.setText(like_or_ulike.get(position));
UrltoValue.getValuefromUrl("https://graph.facebook.com/"+objectid.get(position)+"/likes?access_token="+accesstoken+"&method="+"post");
// listView.getAdapter().getItemAt(position);
j=i+1;
String s=Integer.toString(j);
likescount.set(position, s);
likescountmodify.setText(likescount.get(position));
}
else{
Log.e("unlike","unlike");
like_or_ulike.set(position, "Like");
t.setText(like_or_ulike.get(position));
UrltoValue.getValuefromUrl("https://graph.facebook.com/"+objectid.get(position)+"/likes?access_token="+accesstoken+"&method="+"DELETE");
j=i-1;
String s=Integer.toString(j);
likescount.set(position, s);
likescountmodify.setText(likescount.get(position));
}
}
});
comments.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent myintent=new Intent(Wall.this,Comments.class);
myintent.putExtra("name", namear.get(position));
myintent.putExtra("profimg", profimage.get(position));
myintent.putExtra("message", msgar.get(position));
myintent.putExtra("postpic", postimage.get(position));
myintent.putExtra("objectid", objectid.get(position));
myintent.putExtra("commentsnum",commentsnum.get(position));
myintent.putExtra("webservice", urlString.get(position));
startActivity(myintent);
finish();
}
});
return rowView;
}
}
请帮忙
提前致谢