Android开发 DialogFragment开发例子_底部弹出的对话框

前言

　　 这个是一个底部弹出的对话框，简单明了且容易使用，不会笨重。接口外露ListView适配器itemView的组装，让你可以满足各种Ui要求。

效果图：

代码部分

需要使用的布局文件，这里使用布局是想降低构造布局的复杂度，用纯代码构造布局使用起来更麻烦更复杂。只省一个布局有点本末倒置。为什么要注明这个，是因为本人以前经常干用代码实现布局的对话框，这个不是好主意。

dialog_bottom_single.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/root_layout"
    android:background="@drawable/bg_while_rectangle_radius">

    <TextView
        android:id="@+id/left_btn"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="left|center_vertical"
        android:paddingLeft="25dp"
        android:paddingTop="13dp"
        android:paddingBottom="13dp"
        android:textColor="@color/color_181818"
        android:textSize="18sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@id/title" />

    <TextView
        android:id="@+id/title"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:paddingTop="13dp"
        android:paddingBottom="13dp"
        android:singleLine="true"
        android:textColor="@color/color_181818"
        android:textSize="18sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="@id/left_btn"
        app:layout_constraintRight_toLeftOf="@id/right_btn" />

    <TextView
        android:id="@+id/right_btn"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="right|center_vertical"
        android:paddingTop="13dp"
        android:paddingRight="25dp"
        android:paddingBottom="13dp"
        android:textColor="@color/color_181818"
        android:textSize="18sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toRightOf="@id/title"
        app:layout_constraintRight_toRightOf="parent" />

    <View
        android:id="@+id/line"
        android:layout_width="0dp"
        android:layout_height="1dp"
        android:background="@color/color_72"
        app:layout_constraintTop_toBottomOf="@id/title"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

    <ListView
        android:id="@+id/content_list"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/line"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

bg_while_rectangle_radius.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="@color/ColorWhite"/>
    <corners android:topLeftRadius="10dp" android:topRightRadius="10dp"/>

</shape>

Java代码部分

import android.content.Context;
import android.content.DialogInterface;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.fragment.app.DialogFragment;

import net.wt.gate.R;

import java.util.List;

/**
 * content: 底部显示的单选对话框
 * time: 2020-3-16
 *
 * @author: zhouqiang
 */
public class BottomSingleDialog<T> extends DialogFragment {
    private ConstraintLayout mRootLayout;
    private TextView mLeftBtn;
    private TextView mTitle;
    private TextView mRightBtn;
    private ListView mContentList;
    private OnBuildView mOnBuildView;
    private OnBottomSingleDialogListener<T> mListener;
    private BottomSingleDialogAdapter<T> mAdapter;
    private String mTitleContent;
    private String mLeftContent;
    private String mRightContent;
    private int mSelectedPosition;

    private BottomSingleDialog() {

    }

    public BottomSingleDialog(Context context, String title, String left, String right, int resource, @NonNull List<T> dataList, OnBuildView<T> onBuildView) {
        mTitleContent = title;
        mLeftContent = left;
        mRightContent = right;
        mOnBuildView = onBuildView;
        mAdapter = new BottomSingleDialogAdapter<T>(context, resource, dataList);

    }


    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.dialog_bottom_single, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        mRootLayout = (ConstraintLayout) view.findViewById(R.id.root_layout);
        mLeftBtn = (TextView) view.findViewById(R.id.left_btn);
        mTitle = (TextView) view.findViewById(R.id.title);
        mRightBtn = (TextView) view.findViewById(R.id.right_btn);
        mContentList = (ListView) view.findViewById(R.id.content_list);
        mContentList.setAdapter(mAdapter);

        if (!TextUtils.isEmpty(mTitleContent)) {
            mTitle.setText(mTitleContent);

        }
        if (!TextUtils.isEmpty(mLeftContent)) {
            mLeftBtn.setText(mLeftContent);

        }
        if (!TextUtils.isEmpty(mRightContent)) {
            mRightBtn.setText(mRightContent);

        }
        initListener();
        if (mListener != null) {
            mListener.onViewCreated(view, this);
        }

    }

    @Override
    public void onStart() {
        super.onStart();
        WindowManager.LayoutParams params = getDialog().getWindow().getAttributes();
        params.width = ViewGroup.LayoutParams.MATCH_PARENT;//设置宽度为铺满
        params.gravity = Gravity.BOTTOM;
        getDialog().getWindow().setAttributes((WindowManager.LayoutParams) params);
        getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(getContext().getResources().getColor(R.color.transparent)));
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    public ConstraintLayout getRootLayout() {
        return mRootLayout;
    }

    public TextView getLeftBtn() {
        return mLeftBtn;
    }

    public TextView getTitle() {
        return mTitle;
    }

    public TextView getRightBtn() {
        return mRightBtn;
    }

    public void setOnBottomSingleDialogListener(OnBottomSingleDialogListener<T> listener) {
        mListener = listener;
    }

    /**
     * 设置选中item
     *
     * @param position
     */
    public void setSelectedItem(int position) {
        mSelectedPosition = position;
        if (mAdapter == null) {
            return;
        }
        mAdapter.notifyDataSetChanged();
    }

    /**
     * 更新列表内容
     */
    public void listNotifyDataSetChanged() {
        if (mAdapter == null) {
            return;
        }
        mAdapter.notifyDataSetChanged();
    }

    /**
     * 设置指定item数量的高度
     *
     * @param targetCount
     */
    public void setItemCountHeight(int targetCount) {
        mContentList.post(new Runnable() {
            @Override
            public void run() {
                View view = mContentList.getChildAt(0);
                if (view == null) {
                    return;
                }
                if (mContentList.getCount() < targetCount) {
                    return;
                }
                ViewGroup.LayoutParams layoutParams = mContentList.getLayoutParams();
                layoutParams.height = view.getHeight() * targetCount;
                mContentList.setLayoutParams(layoutParams);
            }
        });
    }

    /**
     * 设置是否点击外部取消Dialog
     * @param isCanceledOnTouchOutside
     */
    public void setCanceledOnTouchOutside(boolean isCanceledOnTouchOutside) {
        if (getDialog() != null) {
            getDialog().setCanceledOnTouchOutside(isCanceledOnTouchOutside);
        }
    }

    private void initListener() {
        mLeftBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mListener != null) {
                    mListener.onClickLeftBtn(BottomSingleDialog.this);
                }
            }
        });
        mRightBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mListener != null) {
                    mListener.onClickRightBtn(BottomSingleDialog.this);
                }
            }
        });
        getDialog().setOnCancelListener(new DialogInterface.OnCancelListener() {
            @Override
            public void onCancel(DialogInterface dialog) {
                if (mListener != null) {
                    mListener.onCancel(BottomSingleDialog.this);
                }

            }
        });
        mContentList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (mListener != null) {
                    mListener.onClickItem(position, view, BottomSingleDialog.this);
                }
            }
        });


    }

    public abstract static class OnBottomSingleDialogListener<T> {
        /**
         * 对话框View在创建的时候回调，在这个回调里，你可以修改对话框所有View的Ui效果
         *
         * @param view
         * @param dialog
         */
        public void onViewCreated(View view, BottomSingleDialog<T> dialog) {

        }

        /**
         * 左边按钮点击
         *
         * @param dialog
         */
        public void onClickLeftBtn(BottomSingleDialog<T> dialog) {

        }

        /**
         * 右边按钮点击
         *
         * @param dialog
         */
        public void onClickRightBtn(BottomSingleDialog<T> dialog) {

        }

        /**
         * 点击ListView中的item
         *
         * @param position 点击位置
         * @param itemView 点击itemView
         * @param dialog
         */
        public void onClickItem(int position, View itemView, BottomSingleDialog<T> dialog) {

        }

        /**
         * 对话框取消
         *
         * @param dialog
         */
        public void onCancel(BottomSingleDialog<T> dialog) {

        }

    }

    public interface OnBuildView<T> {
        /**
         * 组装view并且返回
         *
         * @param position         当前位置
         * @param selectedPosition 当前选中item位置
         * @param parent           父类布局
         * @param layoutRes        导入的布局id
         * @param dataList         导入数据集合
         * @return
         */
        View onBuildView(int position, int selectedPosition, @NonNull ViewGroup parent, int layoutRes, List<T> dataList);
    }

    public class BottomSingleDialogAdapter<T> extends ArrayAdapter<T> {
        private int layoutRes = 0;
        private List<T> list;


        public BottomSingleDialogAdapter(@NonNull Context context, int resource, @NonNull List<T> objects) {
            super(context, resource, objects);
            layoutRes = resource;
            this.list = objects;
        }

        @NonNull
        @Override
        public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
            if (mOnBuildView != null) {
                return mOnBuildView.onBuildView(position, mSelectedPosition, parent, layoutRes, list);
            }
            return super.getView(position, convertView, parent);
        }
    }
}

使用例子

private void initAllReadDialog() {
    List<String> list = new ArrayList<>();
    list.add(getString(R.string.mark_all_as_read));
    list.add(getString(R.string.cancel));
    mAllReadDialog = new BottomSingleDialog<String>(getContext(),
            getString(R.string.mark_all_notifications_of_a_message_as_read),
            "",
            "",
            R.layout.item_all_read_dialog,
            list, new BottomSingleDialog.OnBuildView<String>() {
        @Override
        public View onBuildView(int position, int selectedPosition, @NonNull ViewGroup parent, int layoutRes, List<String> dataList) {
            View view = LayoutInflater.from(parent.getContext()).inflate(layoutRes, parent, false);
            TextView textView = view.findViewById(R.id.text);
            textView.setText(dataList.get(position));
            if (position == 0) {
                textView.setTextColor(getResources().getColor(R.color.color_text_yellow));
            } else {
                textView.setTextColor(getResources().getColor(R.color.color_181818));
            }
            return view;
        }
    });
    mAllReadDialog.setOnBottomSingleDialogListener(new BottomSingleDialog.OnBottomSingleDialogListener<String>() {
        @Override
        public void onViewCreated(View view, BottomSingleDialog<String> dialog) {
            dialog.getLeftBtn().setVisibility(View.GONE);
            dialog.getRightBtn().setVisibility(View.GONE);
            dialog.getTitle().setTextSize(16);
            dialog.getTitle().setTextColor(getResources().getColor(R.color.gray99));
            ViewGroup.LayoutParams layoutParams = dialog.getTitle().getLayoutParams();
            layoutParams.height = UnitConversionUtil.dip2px(getContext(), 50);
            dialog.getTitle().setLayoutParams(layoutParams);
        }

        @Override
        public void onClickItem(int position, View itemView, BottomSingleDialog<String> dialog) {
            mAllReadDialog.dismiss();
            if (position == 0) {
                mMessageViewModel.setMessageAllRead();
                return;
            }
        }

    });
}
    
    private void show() {
        mAllReadDialog.show(getChildFragmentManager(), "AllReadDialog");
    }
    

End