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Example.java
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Example.java
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/*
* Copyright 2010 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.facebook.android;
import org.json.JSONException;
import org.json.JSONObject;
import com.facebook.android.BaseRequestListener;
import com.facebook.android.BaseDialogListener;
import com.facebook.android.SessionEvents.AuthListener;
import com.facebook.android.SessionEvents.LogoutListener;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class Example extends Activity {
// Your Facebook Application ID must be set before running this example
// See http://www.facebook.com/developers/createapp.php
public static final String APP_ID = null;
private static final String[] PERMISSIONS =
new String[] {"publish_stream", "read_stream", "offline_access"};
private LoginButton mLoginButton;
private TextView mText;
private Button mRequestButton;
private Button mPostButton;
private Button mDeleteButton;
private Facebook mFacebook;
private AsyncFacebookRunner mAsyncRunner;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (APP_ID == null) {
Util.showAlert(this, "Warning", "Facebook Applicaton ID must be " +
"specified before running this example: see Example.java");
}
setContentView(R.layout.main);
mLoginButton = (LoginButton) findViewById(R.id.login);
mText = (TextView) Example.this.findViewById(R.id.txt);
mRequestButton = (Button) findViewById(R.id.requestButton);
mPostButton = (Button) findViewById(R.id.postButton);
mDeleteButton = (Button) findViewById(R.id.deletePostButton);
mFacebook = new Facebook();
mAsyncRunner = new AsyncFacebookRunner(mFacebook);
SessionStore.restore(mFacebook, this);
SessionEvents.addAuthListener(new SampleAuthListener());
SessionEvents.addLogoutListener(new SampleLogoutListener());
mLoginButton.init(mFacebook, PERMISSIONS);
mRequestButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mAsyncRunner.request("me", new SampleRequestListener());
}
});
mRequestButton.setVisibility(mFacebook.isSessionValid() ?
View.VISIBLE :
View.INVISIBLE);
mPostButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mFacebook.dialog(Example.this, "stream.publish",
new SampleDialogListener());
}
});
mPostButton.setVisibility(mFacebook.isSessionValid() ?
View.VISIBLE :
View.INVISIBLE);
}
public class SampleAuthListener implements AuthListener {
public void onAuthSucceed() {
mText.setText("You have logged in! ");
mRequestButton.setVisibility(View.VISIBLE);
mPostButton.setVisibility(View.VISIBLE);
}
public void onAuthFail(String error) {
mText.setText("Login Failed: " + error);
}
}
public class SampleLogoutListener implements LogoutListener {
public void onLogoutBegin() {
mText.setText("Logging out...");
}
public void onLogoutFinish() {
mText.setText("You have logged out! ");
mRequestButton.setVisibility(View.INVISIBLE);
mPostButton.setVisibility(View.INVISIBLE);
}
}
public class SampleRequestListener extends BaseRequestListener {
public void onComplete(final String response) {
try {
// process the response here: executed in background thread
Log.d("Facebook-Example", "Response: " + response.toString());
JSONObject json = Util.parseJson(response);
final String name = json.getString("name");
// then post the processed result back to the UI thread
// if we do not do this, an runtime exception will be generated
// e.g. "CalledFromWrongThreadException: Only the original
// thread that created a view hierarchy can touch its views."
Example.this.runOnUiThread(new Runnable() {
public void run() {
mText.setText("Hello there, " + name + "!");
}
});
} catch (JSONException e) {
Log.w("Facebook-Example", "JSON Error in response");
} catch (FacebookError e) {
Log.w("Facebook-Example", "Facebook Error: " + e.getMessage());
}
}
}
public class WallPostRequestListener extends BaseRequestListener {
public void onComplete(final String response) {
Log.d("Facebook-Example", "Got response: " + response);
String message = "<empty>";
try {
JSONObject json = Util.parseJson(response);
message = json.getString("message");
} catch (JSONException e) {
Log.w("Facebook-Example", "JSON Error in response");
} catch (FacebookError e) {
Log.w("Facebook-Example", "Facebook Error: " + e.getMessage());
}
final String text = "Your Wall Post: " + message;
Example.this.runOnUiThread(new Runnable() {
public void run() {
mText.setText(text);
}
});
}
}
public class WallPostDeleteListener extends BaseRequestListener {
public void onComplete(final String response) {
if (response.equals("true")) {
Log.d("Facebook-Example", "Successfully deleted wall post");
Example.this.runOnUiThread(new Runnable() {
public void run() {
mDeleteButton.setVisibility(View.INVISIBLE);
mText.setText("Deleted Wall Post");
}
});
} else {
Log.d("Facebook-Example", "Could not delete wall post");
}
}
}
public class SampleDialogListener extends BaseDialogListener {
public void onComplete(Bundle values) {
final String postId = values.getString("post_id");
if (postId != null) {
Log.d("Facebook-Example", "Dialog Success! post_id=" + postId);
mAsyncRunner.request(postId, new WallPostRequestListener());
mDeleteButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
mAsyncRunner.request(postId, new Bundle(), "DELETE",
new WallPostDeleteListener());
}
});
mDeleteButton.setVisibility(View.VISIBLE);
} else {
Log.d("Facebook-Example", "No wall post made");
}
}
}
}