最近在接触移动项目,为了能以后可以管理移动项目开发,得学点皮毛,自己也倒弄下android。

由于技术选型使用phoneGap+原生插件,前面学习使用phoneGap,总感觉以后会依赖phoneGap太深,毕竟phoneGap还是一个新的项目,很多效果还是原生的好,最后项目选择了完全原生开发,组里也进入了几个nb级别的人,但是看到他们做一些复杂应用的界面,还是很多界面细节需要程序员自己调整,费时费力,特别是前端界面改动频繁更是痛苦至极,故而又想到了HTML5做界面,毕竟HTML5来的快,前端就可以一条龙完成,但是又不想用phoneGap,从而有了自己这个demo的方案。

这个demo的界面不要挑剔瑕疵,我不会设计界面,只是自己的一点想法,结合原生和html5实现的。

大体目标是,通讯和算法,全部放于原生层,而主体界面展示交给HTML5。通过js互调完成数据交换。这样可以统一通讯接口,便于集成。

每个页面都会生成一个activity,过度效果都是原生界面,但是不需要开发很多Activity,而是一个或者几个就足够了,如下代码:

Activity:webview.xml
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical"  > 
    <WebView 
        android:id="@+id/webView" 
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent" 
        android:scrollbarStyle="insideOverlay" > 
    </WebView> 
</LinearLayout>

统一的Activity代码:

public class AccountActivity extends BaseWebViewActivitiy { 
    @Override 
    /** Called when the activity is first created. */ 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        thisActivity = this; 
        setContentView(R.layout.webview); 
        initWebView(R.id.webView);        Intent myIntent = getIntent(); 
        String page =  myIntent.getStringExtra("page"); 
        setupWebView(page); 
    }    private void setupWebView(String page) { 
        webView.addJavascriptInterface(new JavaScriptInterface(), "caller"); 
        if("regist".equals(page)){ 
            loadurl(webView,"file:///android_asset/account/regist.html"); 
        }else if("forgetpassword".equals(page)){ 
            loadurl(webView,"file:///android_asset/account/forgetpassword.html"); 
        }else { 
            isRoot = true; 
            loadurl(webView,"file:///android_asset/account/login.html"); 
        } 
        
    } 
    private class JavaScriptInterface{ 
        @SuppressWarnings("unused") 
        public void regist(){ 
            Intent myIntent = new Intent(AccountActivity.this, AccountActivity.class); 
            myIntent.putExtra("page", "regist"); 
            AccountActivity.this.startActivity(myIntent); 
        } 
        @SuppressWarnings("unused") 
        public void forgetPassword(){ 
            Intent myIntent = new Intent(thisActivity, AccountActivity.class); 
            myIntent.putExtra("page", "forgetpassword"); 
            AccountActivity.this.startActivity(myIntent); 
            //Toast.makeText(activityThis, tip, Toast.LENGTH_SHORT).show();   
        } 
        @SuppressWarnings("unused") 
        public void returnlast(){ 
            AccountActivity.this.finish(); 
        } 
        @SuppressWarnings("unused") 
        public void login(){ 
            UserStatus.getInst().setProfile(new UserProfile()); 
            Intent myIntent = new Intent(AccountActivity.this, UserActivity.class); 
            //myIntent.putExtra("page", "home"); 
            AccountActivity.this.setResult(RESULT_OK); 
            AccountActivity.this.finish (); 
        } 
    } 
}

基类Activity:

public class BaseWebViewActivitiy extends Activity { 
    protected WebView webView = null; 
    protected Handler mHandler = new Handler(); 
    protected Activity thisActivity; 
    private ProgressDialog pd; 
    protected boolean isRoot = false; 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        requestWindowFeature(Window.FEATURE_NO_TITLE); 
        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
    }    protected void initWebView(int webview){ 
        webView = (WebView) findViewById(webview); 
        mHandler=new Handler(){ 
            public void handleMessage(Message msg) 
            {//定义一个Handler,用于处理下载线程与UI间通讯 
              if (!Thread.currentThread().isInterrupted()) 
              { 
                switch (msg.what) 
                { 
                case 0: 
                    pd.show();//显示进度对话框            
                    break; 
                case 1: 
                    pd.hide();//隐藏进度对话框,不可使用dismiss()、cancel(),否则再次调用show()时,显示的对话框小圆圈不会动。 
                    break; 
                } 
              } 
              super.handleMessage(msg); 
            } 
        }; 
        webView.getSettings().setJavaScriptEnabled(true); 
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY); 
        webView.setWebViewClient(new WebViewClient(){   
            public boolean shouldOverrideUrlLoading(final WebView view, final String url) { 
                loadurl(view,url);//载入网页 
                return true;   
            }//重写点击动作,用webview载入 
  
        });        webView.setWebChromeClient(new WebChromeClient(){ 
            public void onProgressChanged(WebView view,int progress){//载入进度改变而触发 
                 if(progress==100){ 
                    mHandler.sendEmptyMessage(1);//如果全部载入,隐藏进度对话框 
                }   
                super.onProgressChanged(view, progress);   
            }   
        }); 
        pd=new ProgressDialog(thisActivity); 
        pd.setProgressStyle(ProgressDialog.STYLE_SPINNER); 
        pd.setMessage("数据载入中,请稍候!"); 
        
    }    public boolean onKeyDown(int keyCode, KeyEvent event) {//捕捉返回键 
        if ((keyCode == KeyEvent.KEYCODE_BACK) && webView.canGoBack()) {   
            webView.goBack();   
            return true;   
        }else if(keyCode == KeyEvent.KEYCODE_BACK){ 
            ConfirmExit();//按了返回键,但已经不能返回,则执行退出确认 
            return true; 
        }   
        return super.onKeyDown(keyCode, event);   
    } 
    private void ConfirmExit(){//退出确认 
        if(!isRoot){ 
            thisActivity.finish();//关闭activity 
        }else{ 
            AlertDialog.Builder ad=new AlertDialog.Builder(thisActivity); 
            ad.setTitle("退出"); 
            ad.setMessage("是否退出软件?"); 
            ad.setPositiveButton("是", new DialogInterface.OnClickListener() {//退出按钮 
                public void onClick(DialogInterface dialog, int i) { 
                    thisActivity.finish();//关闭activity 
                } 
            }); 
            ad.setNegativeButton("否",new DialogInterface.OnClickListener() { 
                public void onClick(DialogInterface dialog, int i) { 
                    //不退出不用执行任何操作 
                } 
            }); 
            ad.show();//显示对话框 
        } 
    } 
    protected void loadurl(final WebView view,final String url){ 
        new Thread(){ 
            public void run(){ 
                mHandler.sendEmptyMessage(0); 
                view.loadUrl(url);//载入网页 
            } 
        }.start(); 
    } 
}javaScript交互代码:
// JavaScript Document 
$(function(){ 
    $("#btnReturnLogin").bind("click",function(){ 
        if($.os.android){ 
            window.caller.returnlast(); 
        //}else if($.os.ios){ 
        }else{ 
            window.open("login.html","_self"); 
        } 
    }); 
    $("#btnRegist").bind("click",function(){ 
        if($.os.android){ 
            window.caller.regist(); 
        //}else if($.os.ios){ 
        }else{ 
            window.open("regist.html","_self"); 
        } 
    }); 
    $("#btnForget").bind("click",function(){ 
        if($.os.android){ 
            window.caller.forgetPassword(); 
        //}else if($.os.ios){ 
        }else{ 
            window.open("forgetpassword.html","_self"); 
        } 
    }); 
    $("#btnLogin").bind("click",function(){ 
        if($.os.android){ 
            window.caller.login(); 
        //}else if($.os.ios){ 
        }else{ 
            window.open("../user/payout.html","_self"); 
        } 
    }); 
});