WeiboDialog.java

package com.ztspeech.weibo.sdk.android;

import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.http.SslError;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.Window;
import android.webkit.SslErrorHandler;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

import com.ztspeech.simutalk2.R;
import com.ztspeech.weibo.sdk.android.util.Utility;

/**
 * 用来显示用户认证界面的dialog，封装了一个webview，通过redirect地址中的参数来获取accesstoken
 * 
 * @author xiaowei6@staff.sina.com.cn
 * 
 */
public class WeiboDialog extends Dialog {

	private static final float[] DIMENSIONS_LANDSCAPE = { 460, 260 };
	private static final float[] DIMENSIONS_PORTRAIT = { 280, 420 };
	private static final String DIALOG_LOADING = "正在载入...";
	private final static String TAG = "Weibo-WebView";
	private String mUrl;
	private WeiboAuthListener mListener;
	private ProgressDialog mProgress;
	private WebView mWebView;
	private LinearLayout mContent;

	public WeiboDialog(Context context, String url, WeiboAuthListener listener) {
		super(context);
		mUrl = url;
		mListener = listener;

	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		mProgress = new ProgressDialog(getContext(), R.style.mydialog);
		mProgress.requestWindowFeature(Window.FEATURE_NO_TITLE);
		mProgress.setMessage(DIALOG_LOADING);
		mProgress.setCanceledOnTouchOutside(false);
		mContent = new LinearLayout(getContext());
		mContent.setOrientation(LinearLayout.VERTICAL);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setUpWebView();

		Display display = getWindow().getWindowManager().getDefaultDisplay();
		float scale = getContext().getResources().getDisplayMetrics().density;
		float[] dimensions = display.getWidth() < display.getHeight() ? DIMENSIONS_PORTRAIT : DIMENSIONS_LANDSCAPE;
		addContentView(mContent, new FrameLayout.LayoutParams((int) (dimensions[0] * scale + 0.5f),
				(int) (dimensions[1] * scale + 0.5f)));
	}

	private void setUpWebView() {
		mWebView = new WebView(getContext());
		mWebView.setVerticalScrollBarEnabled(false);
		mWebView.setHorizontalScrollBarEnabled(false);
		mWebView.setWebViewClient(new WeiboDialog.WeiboWebViewClient());
		mWebView.getSettings().setJavaScriptEnabled(true);
		mWebView.loadUrl(mUrl);
		mWebView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				v.requestFocus();
				return false;
			}
		});
		mWebView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				v.requestFocus();
				return false;
			}
		});
		FrameLayout.LayoutParams fill = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
				ViewGroup.LayoutParams.FILL_PARENT);
		mWebView.setLayoutParams(fill);
		mContent.addView(mWebView);
	}

	protected void onBack() {
		try {
			mProgress.dismiss();
			if (null != mWebView) {
				mWebView.stopLoading();
				mWebView.destroy();
			}
		} catch (Exception e) {
		}
		dismiss();
	}

	private void handleRedirectUrl(WebView view, String url) {
		Bundle values = Utility.parseUrl(url);

		String error = values.getString("error");
		String error_code = values.getString("error_code");

		if (error == null && error_code == null) {
			mListener.onComplete(values);
		} else if (error.equals("access_denied")) {
			// 用户或授权服务器拒绝授予数据访问权限
			mListener.onCancel();
		} else {
			if (error_code == null) {
				mListener.onWeiboException(new WeiboException(error, 0));
			} else {
				mListener.onWeiboException(new WeiboException(error, Integer.parseInt(error_code)));
			}

		}
	}

	private class WeiboWebViewClient extends WebViewClient {

		@Override
		public boolean shouldOverrideUrlLoading(WebView view, String url) {
			if (url.startsWith("sms:")) { // 针对webview里的短信注册流程，需要在此单独处理sms协议
				Intent sendIntent = new Intent(Intent.ACTION_VIEW);
				sendIntent.putExtra("address", url.replace("sms:", ""));
				sendIntent.setType("vnd.android-dir/mms-sms");
				WeiboDialog.this.getContext().startActivity(sendIntent);
				return true;
			}
			return super.shouldOverrideUrlLoading(view, url);
		}

		@Override
		public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
			super.onReceivedError(view, errorCode, description, failingUrl);
			mListener.onError(new WeiboDialogError(description, errorCode, failingUrl));
			WeiboDialog.this.dismiss();
		}

		@Override
		public void onPageStarted(WebView view, String url, Bitmap favicon) {
			Log.d(TAG, "onPageStarted URL: " + url);
			if (url.startsWith(Weibo.redirecturl)) {
				handleRedirectUrl(view, url);
				view.stopLoading();
				WeiboDialog.this.dismiss();
				return;
			}
			super.onPageStarted(view, url, favicon);
			mProgress.show();
		}

		@Override
		public void onPageFinished(WebView view, String url) {
			Log.d(TAG, "onPageFinished URL: " + url);
			super.onPageFinished(view, url);
			if (mProgress.isShowing()) {
				mProgress.dismiss();
			}
			mWebView.setVisibility(View.VISIBLE);
		}

		public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
			handler.proceed();
		}

	}
}