android1.5---2.1实现js调摄像头，调Java代码

package com.iame.mybrowser;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.webkit.JsPromptResult;
import android.webkit.JsResult;
import android.webkit.URLUtil;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MyBrowser extends Activity {
    private static final String DEBUG_TAG ="MyBrowser" ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //用title bar做进度条
        getWindow().requestFeature(Window.FEATURE_PROGRESS);
        setContentView(R.layout.main);
        //获取WebView
        final WebView webView=(WebView)findViewById(R.id.browser);
        //获取URL,也就是http://www.baidu.com这方面的地址
        final EditText text=(EditText)findViewById(R.id.url);
        //确定按钮
        Button go=(Button)findViewById(R.id.go);
        //设置支持javaScript
        webView.getSettings().setJavaScriptEnabled(true);


        //WebViewClient负责帮助WebView处理各种通知、请求事件等。想相当于程序嵌套了一个浏览器.浏览器里面的按钮支持事件，就需要WebView。
        webView.setWebViewClient(new WebViewClient(){
            //页面加载完成时要做的事件
            @Override
            public void onPageFinished(WebView view, String url) {


                super.onPageFinished(view, url);
            }
            //页面加载时要做的事件
            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                text.setText(url);

                super.onPageStarted(view, url, favicon);
            }
        });

        //WebChromeClient负责帮助WebView处理Javascript的对话框，网站图标，网站title，加载进度等。
        webView.setWebChromeClient(new WebChromeClient(){

            //1 .弹出的对话框
            @Override
            public boolean onJsAlert(WebView view, String url, String message,final JsResult result) {

                AlertDialog.Builder b2 = new AlertDialog.Builder(MyBrowser.this);
                b2.setTitle(R.string.tite1);
                b2.setMessage(message);
                b2.setPositiveButton(R.string.ok,new AlertDialog.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                //按确定后腰执行的代码,这句很重要
                                result.confirm();
                                //MyBrowser.this.finish();

                            }
                        });

                //设置对话框是否取消，默认是可以取消的。
                //这种方式按还回键，齐作用
                //b.setCancelable(true);
                //这种方式按还回键，不齐作用
                b2.setCancelable(false);
                //创建对话框，才能显示
                b2.create();
                b2.show();
                //如果还回的是flase将会多弹出窗口，不是我们想要的结果
                return true;
            };
            //2 .对话框
            @Override
            public boolean onJsConfirm(WebView view, String url, String message,
                    final JsResult result) {
                AlertDialog.Builder b3 = new AlertDialog.Builder(MyBrowser.this);
                b3.setTitle(R.string.tite2);
                b3.setMessage(message);
                b3.setPositiveButton(R.string.ok,
                        new AlertDialog.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {

                                result.confirm();

                            }
                        });
                b3.setNegativeButton(R.string.no,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                //按取消做的事件

                                result.cancel();

                            }
                        });
                b3.setCancelable(false);
                b3.create();
                b3.show();
                return true;
            };

            //3 .输入对话框
            @Override
            public boolean onJsPrompt(WebView view, String url, String message,
                    String defaultValue, final JsPromptResult result) {
                //获得环境参数
                final LayoutInflater factory = LayoutInflater.from(MyBrowser.this);
                //导入预先设置的输入设置
                final View v = factory.inflate(R.layout.javascript_prompt_dialog, null);
                //获得输入框标题并设置输入框标题
                ((TextView) v.findViewById(R.id.prompt_message_text)).setText(message);
                //获得输入框平设置默认值
                ((EditText) v.findViewById(R.id.prompt_input_field)).setText(defaultValue);

                AlertDialog.Builder b4 = new AlertDialog.Builder(MyBrowser.this);
                b4.setTitle(R.string.tite3);
                b4.setView(v);
                b4.setPositiveButton(R.string.ok,
                        new AlertDialog.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                String value = ((EditText) v.findViewById(R.id.prompt_input_field)).getText().toString();
                                result.confirm(value);
                            }
                        });
                b4.setNegativeButton(R.string.no,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int which) {
                                result.cancel();
                            }
                        });
                b4.setOnCancelListener(new DialogInterface.OnCancelListener() {
                            public void onCancel(DialogInterface dialog) {
                                result.cancel();
                            }
                        });

                b4.show();
                return true;
            };

            //设置网页加载的进度条
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                MyBrowser.this.getWindow().setFeatureInt(Window.FEATURE_PROGRESS, newProgress * 100 );

                super.onProgressChanged(view, newProgress);
            }
            //设置应用程序的标题title
            @Override
            public void onReceivedTitle(WebView view, String title) {
                MyBrowser.this.setTitle(title);
                super.onReceivedTitle(view, title);
            }
        });



        //确定搜索按钮

        go.setOnClickListener(new OnClickListener(){
            public void onClick(View v)
            {
                try
                {
                    //取得编辑框中我们输入的内容
                    String url = text.getText().toString();
                    //判断输入的内容是不是网址
                    if ( URLUtil.isNetworkUrl(url) )
                    {
                        //装载网址
                        webView.loadUrl(url);
                    }
                    else
                    {
                        text.setText("输入网址错误，请重新输入" );
                    }
                }
                catch (Exception e)
                {
                    Log.e(DEBUG_TAG, e.toString());
                }
            }
        });

        webView.loadUrl("file:///android_asset/index.html" );
    }


   //返回上一页
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        WebView mWebView=(WebView)findViewById(R.id.browser);
        if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
            mWebView.goBack();
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
}

package com.iame.mybrowser;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.webkit.JsPromptResult;
import android.webkit.JsResult;
import android.webkit.URLUtil;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MyBrowser extends Activity {
    private static final String DEBUG_TAG ="MyBrowser";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//用title bar做进度条
		getWindow().requestFeature(Window.FEATURE_PROGRESS);
		setContentView(R.layout.main);
		//获取WebView
		final WebView webView=(WebView)findViewById(R.id.browser);
		//获取URL,也就是http://www.baidu.com这方面的地址
		final EditText text=(EditText)findViewById(R.id.url);
		//确定按钮
		Button go=(Button)findViewById(R.id.go);
		//设置支持javaScript
		webView.getSettings().setJavaScriptEnabled(true);
		
		
		//WebViewClient负责帮助WebView处理各种通知、请求事件等。想相当于程序嵌套了一个浏览器.浏览器里面的按钮支持事件，就需要WebView。
		webView.setWebViewClient(new WebViewClient(){
			//页面加载完成时要做的事件
			@Override
			public void onPageFinished(WebView view, String url) {
				
				
				super.onPageFinished(view, url);
			}
			//页面加载时要做的事件
			@Override
			public void onPageStarted(WebView view, String url, Bitmap favicon) {
				text.setText(url);
				
				super.onPageStarted(view, url, favicon);
			}
		});
		
		//WebChromeClient负责帮助WebView处理Javascript的对话框，网站图标，网站title，加载进度等。
		webView.setWebChromeClient(new WebChromeClient(){
			
			//1.弹出的对话框
			@Override
			public boolean onJsAlert(WebView view, String url, String message,final JsResult result) {
				
				AlertDialog.Builder b2 = new AlertDialog.Builder(MyBrowser.this);
				b2.setTitle(R.string.tite1);
				b2.setMessage(message);
				b2.setPositiveButton(R.string.ok,new AlertDialog.OnClickListener() {
							public void onClick(DialogInterface dialog, int which) {
								//按确定后腰执行的代码,这句很重要
								result.confirm();
								//MyBrowser.this.finish();
								
							}
						});
				
				//设置对话框是否取消，默认是可以取消的。
				//这种方式按还回键，齐作用
				//b.setCancelable(true);
				//这种方式按还回键，不齐作用
				b2.setCancelable(false);
				//创建对话框，才能显示
				b2.create();
				b2.show();
				//如果还回的是flase将会多弹出窗口，不是我们想要的结果
				return true;
			};
			//2.对话框
			@Override
			public boolean onJsConfirm(WebView view, String url, String message,
					final JsResult result) {
				AlertDialog.Builder b3 = new AlertDialog.Builder(MyBrowser.this);
				b3.setTitle(R.string.tite2);
				b3.setMessage(message);
				b3.setPositiveButton(R.string.ok,
						new AlertDialog.OnClickListener() {
							public void onClick(DialogInterface dialog, int which) {
								
								result.confirm();
								
							}
						});
				b3.setNegativeButton(R.string.no,
						new DialogInterface.OnClickListener() {
							public void onClick(DialogInterface dialog, int which) {
								//按取消做的事件
								
								result.cancel();
								
							}
						});
				b3.setCancelable(false);
				b3.create();
				b3.show();
				return true;
			};
			
			//3.输入对话框
			@Override
			public boolean onJsPrompt(WebView view, String url, String message,
					String defaultValue, final JsPromptResult result) {
				//获得环境参数
				final LayoutInflater factory = LayoutInflater.from(MyBrowser.this);
				//导入预先设置的输入设置
				final View v = factory.inflate(R.layout.javascript_prompt_dialog, null);
				//获得输入框标题并设置输入框标题
				((TextView) v.findViewById(R.id.prompt_message_text)).setText(message);
				//获得输入框平设置默认值
				((EditText) v.findViewById(R.id.prompt_input_field)).setText(defaultValue);

				AlertDialog.Builder b4 = new AlertDialog.Builder(MyBrowser.this);
				b4.setTitle(R.string.tite3);
				b4.setView(v);
				b4.setPositiveButton(R.string.ok,
						new AlertDialog.OnClickListener() {
							public void onClick(DialogInterface dialog, int which) {
								String value = ((EditText) v.findViewById(R.id.prompt_input_field)).getText().toString();
								result.confirm(value);
							}
						});
				b4.setNegativeButton(R.string.no,
						new DialogInterface.OnClickListener() {
							public void onClick(DialogInterface dialog, int which) {
								result.cancel();
							}
						});
				b4.setOnCancelListener(new DialogInterface.OnCancelListener() {
							public void onCancel(DialogInterface dialog) {
								result.cancel();
							}
						});
				
				b4.show();
				return true;
			};

			//设置网页加载的进度条
			@Override
			public void onProgressChanged(WebView view, int newProgress) {
				MyBrowser.this.getWindow().setFeatureInt(Window.FEATURE_PROGRESS, newProgress * 100);
				
				super.onProgressChanged(view, newProgress);
			}
			//设置应用程序的标题title
			@Override
			public void onReceivedTitle(WebView view, String title) {
				MyBrowser.this.setTitle(title);
				super.onReceivedTitle(view, title);
			}
		});
	
		
		
		//确定搜索按钮
		
		go.setOnClickListener(new OnClickListener(){
			public void onClick(View v)
			{
				try 
				{
					//取得编辑框中我们输入的内容
			    	String url = text.getText().toString();
			    	//判断输入的内容是不是网址
			    	if ( URLUtil.isNetworkUrl(url) )
					{  
			    		//装载网址
			    		webView.loadUrl(url);
					}
			    	else
			    	{
			    		text.setText("输入网址错误，请重新输入");
					}
				}
				catch (Exception e) 
				{
					Log.e(DEBUG_TAG, e.toString());
				}
			}
		});
		
		webView.loadUrl("file:///android_asset/index.html");
	}
	
	
   //返回上一页
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		WebView mWebView=(WebView)findViewById(R.id.browser);
		if ((keyCode == KeyEvent.KEYCODE_BACK) && mWebView.canGoBack()) {
			mWebView.goBack();
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}
}

intdex.html

<html xmlns="http://www.w3.org/1999/xhtml">
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">

function onAlert(){
alert("This is a alert sample");
}
function onCamera(){
//var personaldata = window.PersonalData.getPersonalData();
var b=confirm("are you sure go to Camera?");
//alert("your choice is "+b);
}
function onPrompt33(){
var b1=prompt("please input your password","yangguangfu");
alert("your input is "+b1);
}


</script>
<pre>
<input type="button" value="Yang_Alert" onclick="onAlert()"/>
<input type="button" id="Personaldata" value="打开相机" onclick="onCamera()"/>
<input type="button" value="Yang_prompt" onclick="onPrompt33()"/>

<a href="http://www.google.com" />Google</a>
</pre>
</html>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.iame.mybrowser" android:versionCode="1"
android:versionName="1.0.0">
<uses-permission android:name="android.permission.INTERNET" />
<application android:icon="@drawable/icon" android:label="MyBroswer">

<activity android:label="MyBrowser" android:name="MyBrowser">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

</application>
<uses-sdk android:minSdkVersion="3" /><!-- 版本标识 -->
<uses-permission android:name="android.permission.INTERNET"/><!-- 访问网络权限 -->
<!-- 在SDCard中创建与删除文件权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<!-- 往SDCard写入数据权限 -->
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<!-- 调用相机权限 -->
<uses-permission android:name="android.permission.CAMERA"/>
</manifest>