Android之检查网络是否可用（跳转网络设置页面）

    private boolean NetWorkStatus() {
        ConnectivityManager cwjManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        // cwjManager.getActiveNetworkInfo();
        boolean netSataus = true;
        if (cwjManager.getActiveNetworkInfo() != null) {
            netSataus = cwjManager.getActiveNetworkInfo().isAvailable();
            Toast.makeText(this, "网络已经打开", Toast.LENGTH_LONG).show();
        } else {

            Builder b = new AlertDialog.Builder(this).setTitle("没有可用的网络")
                    .setMessage("是否对网络进行设置？");
            b.setPositiveButton("是", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                    Intent mIntent = new Intent("/");
                    ComponentName comp = new ComponentName(
                            "com.android.settings",
                            "com.android.settings.WirelessSettings");
                    mIntent.setComponent(comp);
                    mIntent.setAction("android.intent.action.VIEW");
                    // 如果在设置完成后需要再次进行操作，可以重写操作代码，在这里不再重写
                    startActivityForResult(mIntent, 0);
                }
            }).setNeutralButton("否", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                    dialog.cancel();
                }
            }).show();
        }

        return netSataus;
    }

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