Android Facebook Graph API 更新状态

Question

我尝试使用 Android 的 Facebook graph API 来更新状态 http://developers .facebook.com/docs/reference/api/status/ 所以，我的问题是您是否可以给我一些示例代码来使用此 API 更新状态。

Answer 1

这是我使用 Graph API 的完整解决方案

如果您只想更新用户状态，则只需获得“publish_stream”权限。
来自developers.facebook.com...
“publish_stream”：使您的应用能够将内容、评论和点赞发布到用户的流以及用户朋友的流中。拥有此权限后，您可以随时将内容发布到用户的 Feed，无需离线访问。但请注意，Facebook 推荐用户发起的共享模式。

这很重要，因为这意味着您不需要每次尝试更新状态时都重新授权。诀窍是保存密钥/令牌并将其与任何更新请求一起发送。

需要注意的是：我在 Facebook.java 类中将“Facebook.DEFAULT_AUTH_ACTIVITY_CODE”从私有更改为公共。

我的代码有两个按钮，一个用于检查已保存的令牌，另一个仅发送空白令牌，以便我可以测试令牌由于某种原因失败时会发生什么。如果失败，并且 API 返回带有“OAuthException”的字符串，则此代码将重新尝试授权，然后再次尝试更新状态。

FBTest.java

package com.test.FBTest;

import java.io.IOException;
import java.net.MalformedURLException;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.facebook.android.DialogError;
import com.facebook.android.Facebook;
import com.facebook.android.FacebookError;
import com.facebook.android.Facebook.DialogListener;

public class FBTest extends Activity {

Facebook facebook = new Facebook("199064386804603");
EditText et1;
TextView tv1;
Button button1;
Button button2;

private int mAuthAttempts = 0;
private String mFacebookToken;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    button1 = (Button)findViewById(R.id.Button1);
    button2 = (Button)findViewById(R.id.Button2);
    tv1 = (TextView)findViewById(R.id.TextView1);
    et1 = (EditText)findViewById(R.id.EditText1);

    button1.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View v) {
            b1Click();
        }

    });

    button2.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View v) {
            b2Click();
        }

    });
}

private void saveFBToken(String token, long tokenExpires){
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    prefs.edit().putString("FacebookToken", token).commit();
}

private void fbAuthAndPost(final String message){

    facebook.authorize(this, new String[]{"publish_stream"}, new DialogListener() {

        @Override
        public void onComplete(Bundle values) {
            Log.d(this.getClass().getName(),"Facebook.authorize Complete: ");
            saveFBToken(facebook.getAccessToken(), facebook.getAccessExpires());
            updateStatus(values.getString(Facebook.TOKEN), message);
        }

        @Override
        public void onFacebookError(FacebookError error) {
            Log.d(this.getClass().getName(),"Facebook.authorize Error: "+error.toString());
        }

        @Override
        public void onError(DialogError e) {
            Log.d(this.getClass().getName(),"Facebook.authorize DialogError: "+e.toString());
        }

        @Override
        public void onCancel() {
            Log.d(this.getClass().getName(),"Facebook authorization canceled");
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode,Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    switch (requestCode){
    case Facebook.DEFAULT_AUTH_ACTIVITY_CODE:
        facebook.authorizeCallback(requestCode, resultCode, data);
    }
}

private void b1Click(){

    mAuthAttempts = 0;

    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    mFacebookToken = prefs.getString("FacebookToken", "");

    if(mFacebookToken.equals("")){
        fbAuthAndPost(et1.getText().toString());
    }else{
        updateStatus(mFacebookToken,et1.getText().toString());
    }

}

private void b2Click(){
    mAuthAttempts = 0;
    updateStatus("",et1.getText().toString());
}

public void updateStatus(String accessToken, String message){  

    try {         
        Bundle bundle = new Bundle();
        bundle.putString("message", message);         
        bundle.putString(Facebook.TOKEN,accessToken);         
        String response = facebook.request("me/feed",bundle,"POST");         
        Log.d("UPDATE RESPONSE",""+response);
        showToast("Update process complete. Respose:"+response);
        if(response.indexOf("OAuthException") > -1){
            if(mAuthAttempts==0){
                mAuthAttempts++;
                fbAuthAndPost(message);
            }else{
                showToast("OAuthException:");
            }
        }
    } catch (MalformedURLException e) {         
        Log.e("MALFORMED URL",""+e.getMessage());
        showToast("MalformedURLException:"+e.getMessage());
    } catch (IOException e) {         
        Log.e("IOEX",""+e.getMessage());
        showToast("IOException:"+e.getMessage());
    }

    String s = facebook.getAccessToken()+"\n";
    s += String.valueOf(facebook.getAccessExpires())+"\n";
    s += "Now:"+String.valueOf(System.currentTimeMillis())+"\n";
    tv1.setText(s);

} 

private void showToast(String message){
    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
}
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <EditText
    android:id="@+id/EditText1"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
    <Button
    android:id="@+id/Button1"
    android:text="Test: With Auth"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
    <Button
    android:id="@+id/Button2"
    android:text="Test: Without Auth"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    />
    <TextView  
    android:id="@+id/TextView1"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
</LinearLayout>

Answer 2

好吧，这可能不是一个完美的代码，但它现在可以工作。您必须修改调用方式和时间以获得更好的用户体验：

//Implementing SSO
    facebook.authorize(this, new String[]{"publish_stream"}, new DialogListener(){

        @Override
        public void onComplete(Bundle values) {
            updateStatus(values.getString(Facebook.TOKEN));
        }

        @Override
        public void onFacebookError(FacebookError e) {
            Log.d("FACEBOOK ERROR","FB ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
        }

        @Override
        public void onError(DialogError e) {
            Log.e("ERROR","AUTH ERROR. MSG: "+e.getMessage()+", CAUSE: "+e.getCause());
        }

        @Override
        public void onCancel() {
            Log.d("CANCELLED","AUTH CANCELLED");
        }
    });

这是更新的函数：

//updating Status
public void updateStatus(String accessToken){
    try {
        Bundle bundle = new Bundle();
        bundle.putString("message", "test update");
        bundle.putString(Facebook.TOKEN,accessToken);
        String response = facebook.request("me/feed",bundle,"POST");
        Log.d("UPDATE RESPONSE",""+response);
    } catch (MalformedURLException e) {
        Log.e("MALFORMED URL",""+e.getMessage());
    } catch (IOException e) {
        Log.e("IOEX",""+e.getMessage());
    }
}

我希望它有所帮助。