网络的时候，并不是每次都能连接到网络，因此在程序启动中需要对网络的状态进行判断，如果没有网络则提醒用户进行设置

 

Android连接首先，要判断网络状态，需要有相应的权限，下面为权限代码（AndroidManifest.xml）：

复制代码 代码如下:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<uses-permission android:name="android.permission.INTERNET"/>

然后，检测网络状态是否可用

复制代码 代码如下:

/**

 * 对网络连接状态进行判断

 * @return  true, 可用； false， 不可用

 */ 

private boolean isOpenNetwork() { 

    ConnectivityManager connManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); 

    if(connManager.getActiveNetworkInfo() != null) { 

        return connManager.getActiveNetworkInfo().isAvailable(); 

    } 

    return false; 

} 

最后，不可用则打开网络设置

复制代码 代码如下:

/**

 * 访问百度主页，网络不可用则需设置

 */ 

private void initMoreGames() { 

    String URL_MOREGAMES = "http://www.baidu.com"; 

    mWebView = (WebView) findViewById(R.id.view_gamesort); 

    if (mWebView != null) { 

        mWebView.requestFocus(); 

        WebSettings webSettings = mWebView.getSettings(); 

        if (webSettings != null) { 

            webSettings.setJavaScriptEnabled(true); 

            webSettings.setCacheMode(MODE_PRIVATE); 

            webSettings.setDefaultTextEncodingName("utf-8"); 

        } 

        // 判断网络是否可用 

        if(isOpenNetwork() == true) { 

            mWebView.loadUrl(URL_MOREGAMES); 

        } else { 

            AlertDialog.Builder builder = new AlertDialog.Builder(MoreGamesActivity.this); 

            builder.setTitle("没有可用的网络").setMessage("是否对网络进行设置?"); 

            builder.setPositiveButton("是", new DialogInterface.OnClickListener() { 

                @Override 

                public void onClick(DialogInterface dialog, int which) { 

                    Intent intent = null; 

                    try { 

                        String sdkVersion = android.os.Build.VERSION.SDK; 

                        if(Integer.valueOf(sdkVersion) > 10) { 

                            intent = new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS); 

                        }else { 

                            intent = new Intent(); 

                            ComponentName comp = new ComponentName("com.android.settings", "com.android.settings.WirelessSettings"); 

                            intent.setComponent(comp); 

                            intent.setAction("android.intent.action.VIEW"); 

                        } 

                        MoreGamesActivity.this.startActivity(intent); 

                    } catch (Exception e) { 

                        Log.w(TAG, "open network settings failed, please check..."); 

                        e.printStackTrace(); 

                    } 

                } 

            }).setNegativeButton("否", new DialogInterface.OnClickListener() { 

                @Override 

                public void onClick(DialogInterface dialog, int which) { 

                    dialog.cancel();         

                    finish(); 

                } 

            }).show(); 

        } 

    } else { 

        Log.w(TAG, "mWebView is null, please check..."); 

    } 

}