安卓—自定义 AlertDialog 的样式

效果图

1.在style.xml下添加

<!-- 自定义弹出样式 -->
<style name="MyDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
    <!--是否浮在窗口之上-->
    <!--<item name="android:windowIsFloating">true</item>-->
    <!--半透明-->
    <!--<item name="android:windowIsTranslucent">true</item>-->
    <!--是否显示title-->
    <item name="android:windowNoTitle">true</item>
    <!--dialog之外没有焦点的区域是否罩上黑色半透明-->
    <item name="android:background">@color/white</item>
    <item name="android:textColor">@color/gray</item>
    <item name="android:textSize">@dimen/f24</item>
    <!-- 这里是修改顶部标题背景颜色，具体颜色自己定，可以是图片 -->
    <item name="android:topDark">@color/blue_alert</item>
    <!-- 这里是修改内容区域背景颜色 -->
    <item name="android:layout_gravity">center</item>
    <item name="buttonBarButtonStyle">@color/white</item>
</style>

 2.在主体配置里引入自定义的AlertDialog主题

3.java代码写法

/**
 * 默认的弹出窗口
 * @param view
 */
public void alertDialog(View view) {
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("弹出窗");
    builder.setMessage("提示信息！");
    builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            System.out.println("确认执行函数");
        }
    }).setNegativeButton("取消", null);
    builder.show();
}

/**
 * 自定义样式的弹出窗
 * @param view
 */
public void alertDialog2(View view) {
    final AlertDialog.Builder builder = new AlertDialog.Builder(this);
    // 自定义 title样式
    TextView title = new TextView(this);
    title.setText("自定义弹出窗");
    title.setTextSize(24);
    title.setGravity(Gravity.CENTER);
    title.setPadding(0,20,0,20);
    builder.setCustomTitle(title);
    // 中间的信息以一个view的形式设置进去
    TextView msg = new TextView(this);
    msg.setText("自定义弹出提示信息");
    msg.setTextSize(24);
    msg.setGravity(Gravity.CENTER);
    msg.setPadding(20, 40, 20, 40);
    builder.setView(msg);

    builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialogInterface, int i) {
            System.out.println("确认执行函数");
        }
    }).setNegativeButton("取消", null);
    // 调用 show()方法后得到 dialog对象
    AlertDialog dialog = builder.show();
    final Button positiveButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
    final Button negativeButton=dialog.getButton(AlertDialog.BUTTON_NEGATIVE);
    LinearLayout.LayoutParams positiveParams =(LinearLayout.LayoutParams)positiveButton.getLayoutParams();
    positiveParams.gravity = Gravity.CENTER;
    positiveParams.setMargins(10,10,10,10);
    positiveParams.width = 0;
    // 安卓下面有三个位置的按钮，默认权重为 1,设置成 500或更大才能让两个按钮看起来均分
    positiveParams.weight = 500;
    LinearLayout.LayoutParams negativeParams =(LinearLayout.LayoutParams)negativeButton.getLayoutParams();
    negativeParams.gravity = Gravity.CENTER;
    negativeParams.setMargins(10,10,10,10);
    negativeParams.width = 0;
    negativeParams.weight = 500;
    positiveButton.setLayoutParams(positiveParams);
    negativeButton.setLayoutParams(negativeParams);
    positiveButton.setBackgroundColor(Color.parseColor("#FF733E"));
    positiveButton.setTextColor(Color.parseColor("#FFFFFF"));
    negativeButton.setBackgroundColor(Color.parseColor("#DDDDDD"));
}