ConnectButton.java

/*
 * Copyright 2010 Renren, 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.renren.api.connect.android.view;

import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

import com.renren.api.connect.android.R;
import com.renren.api.connect.android.Renren;
import com.renren.api.connect.android.exception.RenrenAuthError;
import com.renren.api.connect.android.view.ConnectButtonListenerHelper.DefaultConnectButtonListener;

/**
 * 自定义的View组件，封装了对登录、登出等的处理。
 * 
 * @author yong.li@opi-corp.com
 * 
 */
public class ConnectButton extends ImageButton implements OnClickListener {

    private Renren renren;

    private ConnectButtonListener connectButtonListener = new DefaultConnectButtonListener();

    private int loginResourceId;

    private int logoutResourceId;

    private Activity activity;

    public ConnectButton(Context context) {
        super(context);
    }

    public ConnectButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.initImageResourceId(attrs);
    }

    public ConnectButton(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        this.initImageResourceId(attrs);
    }

    private void initImageResourceId(AttributeSet attrs) {
        this.logoutResourceId = attrs.getAttributeResourceValue(null, "renren_logout_resource",
                R.drawable.renren_sdk_logout_button);
        this.loginResourceId = attrs.getAttributeResourceValue(null, "renren_login_resource",
                R.drawable.renren_sdk_login_button);
        setImageResource(this.loginResourceId);
    }

    /**
     * 必须初始化后才能使用
     * 
     * @param renren
     * @param activity
     */
    public void init(final Renren renren, Activity activity) {
        this.renren = renren;
        this.activity = activity;
        this.updateButtonImage();
        setBackgroundColor(Color.TRANSPARENT);
        setAdjustViewBounds(true);
        drawableStateChanged();
        setOnClickListener(this);
    }

    @Override
    public void onClick(View arg0) {
        if (renren.isSessionKeyValid()) {
            //AsyncRenren asyncRunner = new AsyncRenren(renren);
            renren.logout(getContext());
            uiThreadUpdateButtonImage();
            connectButtonListener.onLogouted();
        } else {
            renren.authorize(this.activity, new LoginListener());
        }
    }

    /**
     * 设置Listener。
     * 
     * @param connectButtonListener
     */
    public void setConnectButtonListener(ConnectButtonListener connectButtonListener) {
        this.connectButtonListener = connectButtonListener;
    }

    /**
     * 更新按钮图片；必须在UI线程中调用。
     */
    public void updateButtonImage() {
        setImageResource(renren.isSessionKeyValid() ? this.logoutResourceId : this.loginResourceId);
    }

    private void uiThreadUpdateButtonImage() {
        this.post(new Runnable() {

            @Override
            public void run() {
                updateButtonImage();
            }
        });
    }

    private final class LoginListener implements RenrenAuthListener {

        @Override
        public void onComplete(Bundle values) {
            uiThreadUpdateButtonImage();
            connectButtonListener.onLogined(values);
        }

        @Override
        public void onCancelLogin() {
            connectButtonListener.onCancelLogin();
        }

        @Override
        public void onCancelAuth(Bundle values) {
            connectButtonListener.onCancelAuth(values);

        }

        @Override
        public void onRenrenAuthError(RenrenAuthError renrenAuthError) {
            connectButtonListener.onRenrenAuthError(renrenAuthError);
        }
    };
}