在Android開發中我們也會常用到Dialog，我們發現，系統的Dialog很多時候不能夠滿足我們的要求，比如有預設的title等等，還有的有邊框，很難看，我們只需要載入顯示我們的佈局的樣子。那麼需要如何設定，再次記錄一下。程式碼比較簡單，高手請略過。效果圖

1.設定Style

    <style name="Dialog_FullScreen">
        <item name="android:windowFullscreen">true</item>
        <item name="android:windowNoTitle"
 
>true</item>
        <item name="android:windowIsFloating">true</item>
        <item name="android:windowFrame">@null</item>
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowAnimationStyle"
 
>@android:style/Animation.Dialog</item>
        <item name="android:backgroundDimEnabled">true</item>
    </style>

2.設定Dialog的window寬度

   private void showDialog() {
        Dialog dialog=new Dialog(this,R.style.Dialog_FullScreen);
        dialog.setContentView(R.layout.my_dialog);
        dialog.getWindow().setGravity(Gravity.CENTER);
        dialog.setCanceledOnTouchOutside(true
 
);
        dialog.setCancelable(true);
        WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        dialog.getWindow().setAttributes(lp);
        dialog.show();
    }

3.另一種方法：DialogFragment

• 重寫DialogFragment

package cn.bluemobi.dylan.fullscreendialog;

import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.support.v7.app.AlertDialog;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;

/**
 * Created by cookie on 2016/8/22.
 */
public class FullScreenDialog extends DialogFragment {

    private View view;
    private Context context;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        this.context = context;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context, R.style.Dialog_FullScreen);
        if (null == view) {
            view = LayoutInflater.from(context).inflate(R.layout.dialog_default, null);
        }
        builder.setView(view);
        return builder.create();
    }

    public void setContentView(View view) {
        this.view = view;
    }

    public View getContentView() {
        return view;
    }

    private int gravity = Gravity.CENTER;

    public void setGravity(int gravity) {
        this.gravity = gravity;
    }

    @Override
    public void onResume() {
        super.onResume();
        Window mWindow = getDialog().getWindow();
        WindowManager.LayoutParams mLayoutParams = mWindow.getAttributes();
        mLayoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT;
        mLayoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
        mLayoutParams.gravity =gravity;
        mWindow.setAttributes(mLayoutParams);
    }
}

• 用法

    /**
     * 顯示全屏寬度對話方塊
     */
    private void showFullScreenDialog() {
        FullScreenDialog bottomDialog = new FullScreenDialog();
        View dialogView = LayoutInflater.from(MainActivity.this).inflate(R.layout.my_dialog, null);
        bottomDialog.setGravity(Gravity.BOTTOM);
        bottomDialog.setContentView(dialogView);
        bottomDialog.show(getSupportFragmentManager(), "testdialog");
    }