Dialog的使用

以Fragment作为对话框载体：

eg:

LufyDialogFragment.class：

import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.view.LayoutInflater;
import io.githubs.grooters.luffy.R;

public class LufyDialogFragment extends DialogFragment {
    private static final String TAG=LufyDialogFragment.class.getSimpleName();
    private InfoFromDialog infoFromDialog=null;
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        return new AlertDialog.Builder(getActivity())
                .setTitle(R.string.alertDialog_title)
                .setView(LayoutInflater.from(getActivity()).inflate(R.layout.view_dialog,null))
                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        Log.i(TAG,"onClick");
                        if(infoFromDialog!=null){
                            Log.i(TAG,"infoFromDialog");
                            infoFromDialog.getDialogInfo("a","b");
                        }
                    }
                })
                .create();
    }
    public interface InfoFromDialog{
        void getDialogInfo(String a,String b);
    }
    public void setInfoFromDialog(InfoFromDialog infoFromDialog){
        this.infoFromDialog=infoFromDialog;
    }
}

MainActivity,class：

FragmentManager manager=getFragmentManager();
LufyDialogFragment dialogFragment=new LufyDialogFragment();
dialogFragment.setInfoFromDialog(this);
dialogFragment.show(manager,"I am FragmentDialog");

@Override
public void getDialogInfo(String a,String b) {
    Log.i(TAG,a+" "+b);
}

new AlertDialog.Builder(getActivity()).setView方法用来自定义对话框视图

InfoFromDialog是用于传递数据给MainActivity的接口，该接口在MainActivity中重写，故在MainActivity中可以通过接口方法参数拿到LufyDialogFragment中的数据，setInfoFromDialog方法用来给LufyDialogFragment提供MainActivity的上下文，使LufyDialogFragment能调用经MainActivity重写过的接口方法。

注意：

作为对话框的布局视图，线性布局的match_parent是无效的，需要用相对布局