我在我的应用程序中使用xml解析来解析rss feed。我在我的应用程序中集成了facebook。我的要求是，当我点击分享按钮时，它与图像标题和单个描述共享我的内容。
我存储解析数据的主要活动。
SplashActivity.java
package com.example.shareslab;
import java.util.ArrayList;
import java.util.List;
import com.example.shareslab.R;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Html;
import android.text.Spanned;
import android.text.Html.ImageGetter;
import android.util.Log;
import android.view.Gravity;
import android.view.ViewGroup.LayoutParams;
import android.widget.Toast;
public class SplashActivity extends Activity {
/** Called when the activity is first created. */
ProgressDialog progress;
private List<com.example.shareslab.Message> messages;
public static String singleDescription;
public static String title;
static List<String>imageURLAmit;
static List<String> titles;
static List<String> description,link;
public static String[][] arrays;
public static ArrayList<String> galleryImages;
public static int position=0;
//Handle user current location
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash_activity);
// Register the listener with the Location Manager to receive location updates
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
Log.d("net status ", "show "+info);
if (info != null && info.isAvailable()) {
Log.d("net connected", "show "+info);
System.out.println("Connection OKK");
new DownloadCities().execute();
}
else{
Log.d("net not connected", "show "+info);
Toast.makeText(SplashActivity.this, "Check Internet connection. And try again.", Toast.LENGTH_LONG).show();
}
}
private class DownloadCities extends AsyncTask<String, Void, String> {
private String ResultString = "";
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
if(progress.isShowing()){
System.out.println("IN POST EXE");
progress.dismiss();
startActivity(new Intent(SplashActivity.this,MessageList.class));
}
super.onPostExecute(result);
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
progress = ProgressDialog.show(SplashActivity.this, "","Loading....");
progress.setIndeterminate(true);
progress.getWindow().setGravity(Gravity.BOTTOM);;
super.onPreExecute();
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
try {
System.out.println("Going to call getCitiesFromServer()");
loadFeed();
}
catch (Exception e) { // <-- Use the correct exception type
ResultString = "Some error message";
}
return null;
}
}
private void loadFeed(){
position=0;
try{
BaseFeedParser parser = new BaseFeedParser();
messages = parser.parse();
titles = new ArrayList<String>(messages.size());
description = new ArrayList<String>(messages.size());
link = new ArrayList<String>(messages.size());
arrays=new String[messages.size()][];
final List<String> imageURL=new ArrayList<String>(1);
imageURLAmit=new ArrayList<String>(messages.size());
for (com.example.shareslab.Message msg : messages){
Spanned title=Html.fromHtml(msg.getTitle());
titles.add(title.toString());
link.add(msg.getLink().toString());
Spanned data=Html.fromHtml(msg.getDescription(),new ImageGetter() {
public Drawable getDrawable(String source) {
// TODO Auto-generated method stub
imageURL.add(source);
return null;
}
},null);
if(imageURL.size()!=0){
imageURLAmit.add(imageURL.get(0));
}else{
imageURLAmit.add("http://blog.kevinlearynet.netdna-cdn.com/files/applausemeter-300x200.jpg");
}
System.out.println("Position b4 loop : "+position);
int j;
arrays[position]=imageURL.toArray(new String[imageURL.size()]);
System.out.println("2D array colomn length : "+arrays[position].length);
position++;
System.out.println("Position afeter loop : "+position);
imageURL.clear();
description.add( data.toString());
System.out.println("End addition");
}
System.out.println("Final Image URL lenght : "+imageURL.size());
} catch (Throwable t){
Log.e("AndroidNews",t.getMessage(),t);
}
}
}`
这里是Facebook共享的Facebookc.java类。
Facebookc.java
package com.example.shareslab;
import com.example.shareslabfb.DialogError;
import com.example.shareslabfb.Facebook;
import com.example.shareslabfb.Facebook.DialogListener;
import com.example.shareslabfb.FacebookError;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.Toast;
public class Facebookc extends Activity{
private static final String APP_ID = "392939617444978";
private static final String[] PERMISSIONS = new String[] {"publish_stream"};
private static final String TOKEN = "access_token";
private static final String EXPIRES = "expires_in";
private static final String KEY = "facebook-credentials";
private Facebook facebook;
private String messageToPost;
public boolean saveCredentials(Facebook facebook) {
Editor editor = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE).edit();
editor.putString(TOKEN, facebook.getAccessToken());
editor.putLong(EXPIRES, facebook.getAccessExpires());
return editor.commit();
}
public boolean restoreCredentials(Facebook facebook) {
SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences(KEY, Context.MODE_PRIVATE);
facebook.setAccessToken(sharedPreferences.getString(TOKEN, null));
facebook.setAccessExpires(sharedPreferences.getLong(EXPIRES, 0));
return facebook.isSessionValid();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
facebook = new Facebook(APP_ID);
restoreCredentials(facebook);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.facebook_dialog);
String facebookMessage = getIntent().getStringExtra("facebookMessage");
if (facebookMessage == null){
facebookMessage = "";
}
messageToPost = facebookMessage;
}
public void doNotShare(View button){
finish();
}
public void share(View button){
if (! facebook.isSessionValid()) {
loginAndPostToWall();
}
else {
postToWall(messageToPost);
}
}
public void loginAndPostToWall(){
facebook.authorize(this, PERMISSIONS, Facebook.FORCE_DIALOG_AUTH, new LoginDialogListener());
}
public void postToWall(String message){
Bundle parameters = new Bundle();
parameters.putString("message", message);
parameters.putString("name", "titles.get(position)");
parameters.putString("caption","shareslab.com");
parameters.putString("link", "http://www.shareslab.com");
parameters.putString("picture", "imageURLAmit.get(position)");
parameters.putString("description","description.get(position)");
try {
facebook.request("me");
String response = facebook.request("me/feed", parameters, "POST");
Log.d("Tests", "got response: " + response);
if (response == null || response.equals("") ||
response.equals("false")) {
showToast("Blank response.");
}
else {
showToast("Message posted to your facebook wall!");
}
finish();
} catch (Exception e) {
showToast("Failed to post to wall!");
e.printStackTrace();
finish();
}
}
class LoginDialogListener implements DialogListener {
public void onComplete(Bundle values) {
saveCredentials(facebook);
if (messageToPost != null){
postToWall(messageToPost);
}
}
public void onFacebookError(FacebookError error) {
showToast("Authentication with Facebook failed!");
finish();
}
public void onError(DialogError error) {
showToast("Authentication with Facebook failed!");
finish();
}
public void onCancel() {
showToast("Authentication with Facebook cancelled!");
finish();
}
}
private void showToast(String message){
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
}
答案 0 :(得分：1)
如果您的图像保存在SD卡中，则可以在获取图像后使用以下代码： -
在代码中，uri of image被声明为imageUri。
public void performPostToWall(Uri imageUri){
byte[] data = null;
ContentResolver cr = context.getContentResolver();
InputStream in = null;
try {
in = cr.openInputStream(imageUri);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 1;
Bitmap thumb = BitmapFactory.decodeStream(in, null, options);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
thumb.compress(Bitmap.CompressFormat.JPEG, 100, baos);
data = baos.toByteArray();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (Exception e) {
Toast.makeText(context, "Unable to upload image", Toast.LENGTH_LONG).show();
}
Bundle params = new Bundle();
params.putByteArray("picture", data);
if (!(captionText == null || captionText.equals("")))
params.putString("caption", captionText);
Request req = new Request(session, "me/photos", params, HttpMethod.POST, new Request.Callback() {
@Override
public void onCompleted(Response response) {
context.onPostToMyWallWithImageResponse(response);
}
});
req.executeAsync();
}
答案 1 :(得分：0)
这段代码
public void postToWall(String message){
try {
String response=facebook.request("me");
Bundle parameters = new Bundle();
parameters.putString("message", _id);
parameters.putString("caption", " message.");
parameters.putString("description", "A secret message is waiting for you.");
parameters.putString("name", "A Secret Message For You");
parameters.putString("picture", "http://sheokhanda.files.wordpress.com/2010/06/spring-colors.jpg");
parameters.putString("link", "http://www.google.com" );
response = facebook.request("me/feed", parameters, "POST");
Log.d("Tests", "got response: " + response);
if (response == null || response.equals("") || response.equals("false")) {
Log.i(TAG, "Blank Response...");
}
else {
Log.i(TAG, "Message posted to your facebook wall!..");
}
} catch (Exception e) {
e.printStackTrace();
}
}
它需要此权限publish_stream