Java tutorial
/** * Copyright 2010-present Facebook. * * 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; /* * The me, delete and back_parent buttons are downloaded from http://icongal.com/ */ import android.app.Activity; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.text.TextUtils; import android.text.util.Linkify; import android.text.util.Linkify.TransformFilter; import android.view.View; import android.view.View.OnClickListener; import android.view.inputmethod.InputMethodManager; import android.widget.*; import org.json.JSONException; import org.json.JSONObject; import java.util.Iterator; import java.util.Vector; import java.util.regex.Matcher; import java.util.regex.Pattern; @SuppressWarnings("deprecation") public class GraphExplorer extends Activity { private Button mSubmitButton, mViewURLButton; private Button mGetPermissionsButton; private Button mTextDeleteButton, mMeButton; private Button mFieldsConnectionsButton, mBackParentButton; private TextView mOutput; private EditText mInputId; private Bundle params; private String url, mParentObjectId; private ProgressDialog dialog; private String rootString; private ScrollView mScrollView; private Handler mHandler; private final static String BASE_GRAPH_URL = "https://graph.facebook.com"; private JSONObject metadataObject; /* * Layout the Graph Explorer */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mHandler = new Handler(); setContentView(R.layout.graph_explorer); url = BASE_GRAPH_URL; // Base URL mInputId = (EditText) findViewById(R.id.inputId); mOutput = (TextView) findViewById(R.id.output); mSubmitButton = (Button) findViewById(R.id.submitButton); mViewURLButton = (Button) findViewById(R.id.viewURLButton); mGetPermissionsButton = (Button) findViewById(R.id.accessTokenButton); mFieldsConnectionsButton = (Button) findViewById(R.id.fieldsAndConnectionsButton); mBackParentButton = (Button) findViewById(R.id.backParentButton); mScrollView = (ScrollView) findViewById(R.id.ScrollView01); mTextDeleteButton = (Button) findViewById(R.id.textDeleteButton); mMeButton = (Button) findViewById(R.id.meButton); if (Utility.mFacebook.isSessionValid()) { mMeButton.setVisibility(View.VISIBLE); } params = new Bundle(); mSubmitButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ((InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE)) .hideSoftInputFromWindow(mInputId.getWindowToken(), 0); // Prepare the URL to be shown on 'View URL' click action. This // is not used by the SDK url = BASE_GRAPH_URL; // Base URL /* * Source Tag: graph_explorer */ rootString = mInputId.getText().toString(); if (!TextUtils.isEmpty(rootString)) { dialog = ProgressDialog.show(GraphExplorer.this, "", getString(R.string.please_wait), true, true); params.putString("metadata", "1"); Utility.mAsyncRunner.request(rootString, params, new graphApiRequestListener()); url += "/" + rootString; // Relative Path provided by you } } }); mViewURLButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setText(url); Linkify.addLinks(mOutput, Linkify.WEB_URLS); } }); mGetPermissionsButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (Utility.mFacebook.isSessionValid()) { dialog = ProgressDialog.show(GraphExplorer.this, "", getString(R.string.fetching_current_permissions), true, true); Bundle params = new Bundle(); params.putString("access_token", Utility.mFacebook.getAccessToken()); Utility.mAsyncRunner.request("me/permissions", params, new permissionsRequestListener()); } else { new PermissionsDialog(GraphExplorer.this).show(); } } }); mFieldsConnectionsButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (metadataObject == null) { makeToast("No fields, connections availalbe for this object."); } else { new FieldsConnectionsDialog(GraphExplorer.this, metadataObject).show(); } } }); mTextDeleteButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { url = BASE_GRAPH_URL; // Base URL mParentObjectId = ""; mInputId.setText(""); params.clear(); metadataObject = null; setText(""); mBackParentButton.setVisibility(View.INVISIBLE); } }); mMeButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mInputId.setText("me"); mSubmitButton.performClick(); } }); mBackParentButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mInputId.setText(mParentObjectId); mParentObjectId = ""; mSubmitButton.performClick(); } }); } @Override public void onResume() { super.onResume(); if (Utility.mFacebook.isSessionValid()) { mMeButton.setVisibility(View.VISIBLE); } if (Utility.objectID != null) { mInputId.setText(Utility.objectID); Utility.objectID = null; mSubmitButton.performClick(); } } protected void processIntent(Intent incomingIntent) { Uri intentUri = incomingIntent.getData(); if (intentUri == null) { return; } String objectID = intentUri.getHost(); mInputId.setText(objectID); mSubmitButton.performClick(); } public void getConnection(String connection) { mInputId.setText(rootString + "/" + connection); mParentObjectId = rootString; mSubmitButton.performClick(); } public void getFields(Vector<String> fieldsVector) { String fields = ""; int count = 0; for (String field : fieldsVector) { fields += field; if (++count < fieldsVector.size()) { fields += ","; } } params.putString("fields", fields); mSubmitButton.performClick(); } /* * Callback for the permission OAuth Dialog */ public class permissionsRequestListener extends BaseRequestListener { @Override public void onComplete(final String response, final Object state) { dialog.dismiss(); /* * Clear the current permission list and repopulate with new * permissions. This is used to mark assigned permission green and * unclickable. */ Utility.currentPermissions.clear(); try { JSONObject jsonObject = new JSONObject(response).getJSONArray("data").getJSONObject(0); Iterator<?> iterator = jsonObject.keys(); String permission; while (iterator.hasNext()) { permission = (String) iterator.next(); Utility.currentPermissions.put(permission, String.valueOf(jsonObject.getInt(permission))); } } catch (JSONException e) { makeToast("Permissions could not be fetched, none will be selected by default."); } mHandler.post(new Runnable() { @Override public void run() { new PermissionsDialog(GraphExplorer.this).show(); } }); } public void onFacebookError(FacebookError error) { dialog.dismiss(); makeToast("Permissions could not be fetched, none will be selected by default."); mHandler.post(new Runnable() { @Override public void run() { new PermissionsDialog(GraphExplorer.this).show(); } }); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { Utility.mFacebook.authorizeCallback(requestCode, resultCode, data); } /* * Callback after a given Graph API request is executed Get the response and * show it. */ public class graphApiRequestListener extends BaseRequestListener { @Override public void onComplete(final String response, final Object state) { dialog.dismiss(); // access token is appended by Facebook object, hence params are // added here after request is complete if (!params.isEmpty()) { url += "?" + Util.encodeUrl(params); // Params } metadataObject = null; params.clear(); try { JSONObject json = Util.parseJson(response); if (json.has("metadata")) { metadataObject = json.getJSONObject("metadata"); json.remove("metadata"); } else { metadataObject = null; } setText(json.toString(2)); } catch (JSONException e) { setText(e.getMessage()); e.printStackTrace(); } catch (FacebookError e) { setText(e.getMessage()); e.printStackTrace(); } } public void onFacebookError(FacebookError error) { dialog.dismiss(); setText(error.getMessage()); params.clear(); metadataObject = null; } } public void setText(final String txt) { mHandler.post(new Runnable() { /* * A transform filter that simply returns just the text captured by * the first regular expression group. */ TransformFilter idFilter = new TransformFilter() { @Override public final String transformUrl(final Matcher match, String url) { return match.group(1); } }; @Override public void run() { mViewURLButton.setVisibility(TextUtils.isEmpty(txt) ? View.INVISIBLE : View.VISIBLE); mFieldsConnectionsButton.setVisibility(TextUtils.isEmpty(txt) ? View.INVISIBLE : View.VISIBLE); mOutput.setVisibility(TextUtils.isEmpty(txt) ? View.INVISIBLE : View.VISIBLE); mBackParentButton.setVisibility(TextUtils.isEmpty(mParentObjectId) ? View.INVISIBLE : View.VISIBLE); String convertedTxt = txt.replace("\\/", "/"); mOutput.setText(convertedTxt); mScrollView.scrollTo(0, 0); Linkify.addLinks(mOutput, Linkify.WEB_URLS); /* * Linkify the object ids so they can be clicked. match pattern: * "id" : "objectid" (objectid can be int or int_int) */ Pattern pattern = Pattern.compile("\"id\": \"(\\d*_?\\d*)\""); String scheme = "fbGraphEx://"; Linkify.addLinks(mOutput, pattern, scheme, null, idFilter); } }); } private void makeToast(final String msg) { mHandler.post(new Runnable() { @Override public void run() { Toast.makeText(GraphExplorer.this, msg, Toast.LENGTH_SHORT).show(); } }); } }