Android 仿ios底部弹出式对话框

本博客文件缺少上传drawle  .9图

（一）加载方式

new ActionSheetDialog(context)
        .builder()
        .setTitle("设置")
        .setCancelable(false)
        .setCanceledOnTouchOutside(true)
        .addSheetItem(Constants.MODDLE_FONTSIZE, SheetItemColor.Blue, new OnSheetItemClickListener() {
            @Override
            public void onClick(int which) {
              
            }
        })
        .addSheetItem(Constants.SMALL_FONTSIZE,SheetItemColor.Blue, new OnSheetItemClickListener() {
            @Override
            public void onClick(int which) {
            
            }
        }).show();

（二）核心类

public class ActionSheetDialog {
    private Context context;
    private Dialog dialog;
    private TextView txt_title;
    private TextView txt_cancel;
    private LinearLayout lLayout_content;
    private ScrollView sLayout_content;
    private boolean showTitle = false;
    private List<SheetItem> sheetItemList;
    private Display display;

    public ActionSheetDialog(Context context) {
        this.context = context;
        WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        display = windowManager.getDefaultDisplay();
    }

    public ActionSheetDialog builder() {
        // 获取Dialog布局
        View view = LayoutInflater.from(context).inflate(R.layout.view_actionsheet, null);
        // 设置Dialog最小宽度为屏幕宽度
        view.setMinimumWidth(display.getWidth());
        // 获取自定义Dialog布局中的控件
        sLayout_content = (ScrollView) view.findViewById(R.id.sLayout_content);
        lLayout_content = (LinearLayout) view.findViewById(R.id.lLayout_content);
        txt_title = (TextView) view.findViewById(R.id.txt_title);
        txt_cancel = (TextView) view.findViewById(R.id.txt_cancel);
        txt_cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });

        // 定义Dialog布局和参数
        dialog = new Dialog(context, R.style.ActionSheetDialogStyle);
        dialog.setContentView(view);
        Window dialogWindow = dialog.getWindow();
        dialogWindow.setGravity(Gravity.LEFT | Gravity.BOTTOM);
        WindowManager.LayoutParams lp = dialogWindow.getAttributes();
        lp.x = 0;
        lp.y = 0;
        dialogWindow.setAttributes(lp);
        return this;
    }

    public ActionSheetDialog setTitle(String title) {
        showTitle = true;
        txt_title.setVisibility(View.VISIBLE);
        txt_title.setText(title);
        return this;
    }

    public ActionSheetDialog setCancelable(boolean cancel) {
        dialog.setCancelable(cancel);
        return this;
    }

    public ActionSheetDialog setCanceledOnTouchOutside(boolean cancel) {
        dialog.setCanceledOnTouchOutside(cancel);
        return this;
    }

    /**
     * @param strItem  条目名称
     * @param color    条目字体颜色，设置null则默认蓝色
     * @param listener
     * @return
     */
    public ActionSheetDialog addSheetItem(String strItem, SheetItemColor color, OnSheetItemClickListener listener{
        if (sheetItemList == null) {
            sheetItemList = new ArrayList<SheetItem>();
        }
        sheetItemList.add(new SheetItem(strItem, color, listener));
        return this;
    }

    /**
     * 设置条目布局
     */
    private void setSheetItems() {
        if (sheetItemList == null || sheetItemList.size() <= 0) {
            return;
        }
        int size = sheetItemList.size();
        // TODO 高度控制，非最佳解决办法
        // 添加条目过多的时候控制高度
        if (size >= 7) {
            LayoutParams params = (LayoutParams) sLayout_content.getLayoutParams();
            params.height = display.getHeight() / 2;
            sLayout_content.setLayoutParams(params);
        }
        // 循环添加条目
        for (int i = 1; i <= size; i++) {
            final int index = i;
            SheetItem sheetItem = sheetItemList.get(i - 1);
            String strItem = sheetItem.name;
            SheetItemColor color = sheetItem.color;
            final OnSheetItemClickListener listener = (OnSheetItemClickListener) sheetItem.itemClickListener;
            TextView textView = new TextView(context);
            textView.setText(strItem);
            textView.setTextSize(18);
            textView.setGravity(Gravity.CENTER);
            // 背景图片
            if (size == 1) {
                if (showTitle) {
                    textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);
                } else {
                    textView.setBackgroundResource(R.drawable.actionsheet_single_selector);
                }
            } else {
                if (showTitle) {
                    if (i >= 1 && i < size) {
                        textView.setBackgroundResource(R.drawable.actionsheet_middle_selector);
                    } else {
                        textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);
                    }
                } else {
                    if (i == 1) {
                        textView.setBackgroundResource(R.drawable.actionsheet_top_selector);
                    } else if (i < size) {
                        textView.setBackgroundResource(R.drawable.actionsheet_middle_selector);
                    } else {
                        textView.setBackgroundResource(R.drawable.actionsheet_bottom_selector);
                    }
                }
            }

            // 字体颜色
            if (color == null) {
                textView.setTextColor(Color.parseColor(SheetItemColor.Blue.getName()));
            } else {
                textView.setTextColor(Color.parseColor(color.getName()));
            }

            // 高度
            float scale = context.getResources().getDisplayMetrics().density;
            int height = (int) (45 * scale + 0.5f);
            textView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, height));
            // 点击事件
            textView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    listener.onClick(index);
                    dialog.dismiss();
                }
            });
            lLayout_content.addView(textView);
        }
    }

    public void show() {
        setSheetItems();
        dialog.show();
    }

    public interface OnSheetItemClickListener {
        void onClick(int which);
    }

    public class SheetItem {
        String name;
        OnSheetItemClickListener itemClickListener;
        SheetItemColor color;
        public SheetItem(String name, SheetItemColor color, OnSheetItemClickListener itemClickListener) {
            this.name = name;
            this.color = color;
            this.itemClickListener = itemClickListener;
        }
    }

    public enum SheetItemColor {
        Blue("#037BFF"), Red("#FD4A2E");
        private String name;

        private SheetItemColor(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }
（三）xml布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="8dp" >
    <TextView
        android:id="@+id/txt_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/actionsheet_top_normal"
        android:gravity="center"
        android:minHeight="45dp"
        android:paddingTop="10dp"
        android:paddingBottom="10dp"
        android:paddingLeft="15dp"
        android:paddingRight="15dp"
        android:textColor="@color/actionsheet_gray"
        android:textSize="13sp"
        android:visibility="gone" />
    <ScrollView
        android:id="@+id/sLayout_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fadingEdge="none">
        <LinearLayout
            android:id="@+id/lLayout_content"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" >
        </LinearLayout>
    </ScrollView>
    <TextView
        android:id="@+id/txt_cancel"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:layout_marginTop="8dp"
        android:background="@drawable/actionsheet_single_selector"
        android:gravity="center"
        android:text="取消"
        android:textColor="@color/dark_blue"
        android:textSize="18sp" />
</LinearLayout>

（四）style样式及selector

//actionsheet_single_selector

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/actionsheet_single_pressed" android:state_pressed="true"/>
    <item android:drawable="@drawable/actionsheet_single_normal"/>
</selector>

<!-- 自定义仿IOS的ActionSheet底部Dialog的样式 ，有模糊效果 -->
<style name="ActionSheetDialogStyle" parent="@android:style/Theme.Dialog">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowFrame">@null</item>
    <item name="android:backgroundDimEnabled">true</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@style/ActionSheetDialogAnimation</item>
</style>
<!-- ActionSheet进出动画 -->
<style name="ActionSheetDialogAnimation" parent="@android:style/Animation.Dialog">
    <item name="android:windowEnterAnimation">@anim/actionsheet_dialog_in</item>
    <item name="android:windowExitAnimation">@anim/actionsheet_dialog_out</item>
</style>