短视频APP源码，检查网络状况相关的代码

public boolean checkNetworkInfo() {
        ConnectivityManager conMan = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        // mobile 3G Data Network
        State mobile = conMan.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
                .getState();
        // wifi
        State wifi = conMan.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
                .getState();
        // 如果3G网络和wifi网络都未连接，且不是处于正在连接状态 则进入Network Setting界面 由用户配置网络连接
        if (mobile == State.CONNECTED || mobile == State.CONNECTING)
            return true;
        if (wifi == State.CONNECTED || wifi == State.CONNECTING)
            return true;
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage(getResources().getString(R.string.no_network))
                .setCancelable(false)
                .setPositiveButton(
                        getResources().getString(R.string.configuration),
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {

                                // 进入无线网络配置界面
                                startActivity(new Intent(
                                        Settings.ACTION_WIRELESS_SETTINGS));
                                MainActivity.this.finish();
                            }
                        })
                .setNegativeButton(getResources().getString(R.string.quit),
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int id) {
                                MainActivity.this.finish();
                            }
                        });
        builder.show();
        return false;
    }

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