一个简单的弹出框，布局随意设置

这是我的弹出框的样式，样式可以随便更改，且更改方便



/**
 * 显示打印弹窗
 *
 * @param activity
 * @return
 */
public AlertDialog showClear(final Activity activity) {
    AlertDialog.Builder builder = new AlertDialog.Builder(activity);
    View view = View.inflate(activity, R.layout.dialog_main_print, null);
    TextView txt_cancel = view.findViewById(R.id.txt_cancel);
    TextView txt_sure = view.findViewById(R.id.txt_sure);
    builder.setView(view);
    builder.setCancelable(true);
    final AlertDialog dialog = builder.create();
    txt_cancel.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            dialog.dismiss();
        }
    });
    txt_sure.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
          startActivity(new Intent(MainActivity.this,SettingsActivity.class));
            dialog.dismiss();
        }
    });

    dialog.show();
    return dialog;

}

这样一个简单的弹窗就实现了，但是又一个小bug，显示的时候会有周围会有一个黑色的空白。

改成下边这样就可消除黑色空白。

new AlertDialog.Builder(new ContextThemeWrapper(this, R.style.Theme_Transparent))

这是style的代码

<style name="Theme_Transparent" parent="@android:style/Theme.DeviceDefault.Light.Dialog">
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowNoTitle">true</item>
</style>

还可以设置Dialog的显示位置等其他属性：

//获取当前Activity所在的窗体
        Window dialogWindow = dialog.getWindow();
        //设置Dialog从窗体底部弹出
        dialogWindow.setGravity(Gravity.BOTTOM);
        //获得窗体的属性
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        lp.y = 20;//设置Dialog距离底部的距离
        lp.height = 800;
        lp.width = this.getWindowManager().getDefaultDisplay().getWidth();
//       将属性设置给窗体
        dialogWindow.setAttributes(lp);

下面放上弹窗的布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <LinearLayout
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:background="@drawable/takeout_dialog_bg">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:layout_marginTop="16dp"
            android:text="温馨提示"
            android:textColor="@color/black"
            android:textSize="16sp" />

        <TextView
            android:id="@+id/txt_remind"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="确定要清空外卖订单吗？"
            android:layout_marginTop="6dp"
            android:textColor="@color/black"
            android:layout_marginBottom="16dp"
            android:gravity="center"/>
        <TextView
            android:layout_width="match_parent"
            android:layout_height="0.5dp"
            android:background="@color/transfer_txtcolor"
            />
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <TextView
                android:id="@+id/txt_cancel"
                android:layout_width="wrap_content"
                android:layout_height="50dp"
                android:layout_weight="1"
                android:gravity="center"
                android:textColor="@color/dialog_bule"
                android:text="取消"/>
            <TextView
                android:layout_width="0.5dp"
                android:layout_height="match_parent"
                android:background="@color/transfer_txtcolor"
                />
            <TextView
                android:id="@+id/txt_sure"
                android:layout_width="wrap_content"
                android:layout_height="50dp"
                android:layout_weight="1"
                android:gravity="center"
                android:textColor="@color/dialog_bule"
                android:text="确定"/>
        </LinearLayout>
    </LinearLayout>
    
</LinearLayout>