Android编程：底部弹出输入框

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Android编程：底部弹出的对话框

本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.

环境：

主机:WIN10

开发环境:Android Studio 2.2 Preview 3

说明：

在《Android编程：底部弹出的对话框》中实现了底部弹出的对话框。在此基础上实现通用的输入框，效果如下图所示。输入框类中通过回调机制通知活动，从而实现了活动与对话框的解耦。

效果图：

布局文件dialog_input.xml：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical" android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingLeft="16dp"    android:paddingRight="16dp">    <TextView        android:id="@+id/title"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:paddingTop="16dp"        android:paddingBottom="16dp"        android:text="标题"/>    <android.support.design.widget.TextInputLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <android.support.design.widget.TextInputEditText            android:id="@+id/input"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:maxLines="1"            android:singleLine="true" />    </android.support.design.widget.TextInputLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:paddingTop="16dp"        android:paddingBottom="16dp">        <Button            android:id="@+id/cancel"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:layout_marginLeft="5dp"            android:layout_marginRight="5dp"            android:text="取消" />        <Button            android:id="@+id/ok"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:layout_marginLeft="5dp"            android:layout_marginRight="5dp"            android:text="确定" />    </LinearLayout></LinearLayout>

源代码：

InputDialogInterface.class：

package com.bazhangkeji.classroom.common;public interface InputDialogInterface {    void onClick();    FilterResult filter(String inputText);    class FilterResult {        public boolean result;        // 错误提示.result为false时有效        public String errorHint = "";    }}

InputDialog.class：

package com.bazhangkeji.classroom.common;import android.app.Dialog;import android.graphics.Color;import android.os.Bundle;import android.support.annotation.NonNull;import android.support.design.widget.TextInputEditText;import android.text.TextUtils;import android.view.Gravity;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.RelativeLayout;import android.widget.TextView;import com.bazhangkeji.classroom.R;import com.bazhangkeji.classroom.database.DBPersonalInfo;import com.bazhangkeji.classroom.database.PersonalInfo;import com.bazhangkeji.classroom.session.VideoSessionActivity;import com.bazhangkeji.classroom.session.VoiceSessionActivity;import com.jakewharton.rxbinding2.view.RxView;import com.trello.rxlifecycle2.android.ActivityEvent;import com.trello.rxlifecycle2.android.FragmentEvent;import com.trello.rxlifecycle2.components.RxDialogFragment;import java.util.concurrent.TimeUnit;public class InputDialog extends RxDialogFragment {    private Dialog dialog;    private InputDialogInterface observer;    private String title;    private String hint;    private TextInputEditText editTextInput;    /**     * 初始化.必须调用一次     * @param title: 标题     * @param hint: 提示     * @param observer: 观察者对象     */    public void init(String title, String hint, InputDialogInterface observer) {        this.title = title;        this.hint = hint;        this.observer = observer;    }    @NonNull    @Override    public Dialog onCreateDialog(Bundle savedInstanceState) {        dialog = new Dialog(getActivity(), R.style.DialogPopBottom);        View inflate = LayoutInflater.from(getActivity()).inflate(R.layout.dialog_input, null);        dialog.setContentView(inflate);        dialog.setCanceledOnTouchOutside(true);        Window window = dialog.getWindow();        WindowManager.LayoutParams lp = window.getAttributes();        lp.gravity = Gravity.BOTTOM;        lp.width = WindowManager.LayoutParams.MATCH_PARENT;        window.setAttributes(lp);        TextView textViewTitle = (TextView) inflate.findViewById(R.id.title);        Button buttonCancel = (Button) inflate.findViewById(R.id.cancel);        Button buttonOK = (Button) inflate.findViewById(R.id.ok);        editTextInput = (TextInputEditText) inflate.findViewById(R.id.input);        textViewTitle.setText(title);        editTextInput.setHint(hint);        RxView.clicks(buttonCancel)                .throttleFirst(1, TimeUnit.SECONDS)                .compose(this.bindUntilEvent(FragmentEvent.DESTROY))                .subscribe(v -> dialog.cancel());        RxView.clicks(buttonOK)                .throttleFirst(1, TimeUnit.SECONDS)                .compose(this.bindUntilEvent(FragmentEvent.DESTROY))                .subscribe(v -> {                    InputDialogInterface.FilterResult filterResult = observer.filter(editTextInput.getText().toString());                    if (filterResult == null || filterResult.result) {                        dialog.cancel();                        observer.onClick();                    } else {                        editTextInput.setError(filterResult.errorHint);                        editTextInput.requestFocus();                    }                });        return dialog;    }    /**     * 得到输入内容     * @return 输入内容     */    public String getInput() {        return editTextInput.getText().toString();    }}

初始化:

private InputDialog addFriendDialog = new InputDialog();

addFriendDialog.init("搜索好友", "请输入用户id", new InputDialogInterface() {            @Override            public void onClick() {                Logging.e("click!!!" + addFriendDialog.getInput());            }            @Override            public FilterResult filter(String inputText) {                return isInputValid(inputText);            }        });

private InputDialogInterface.FilterResult isInputValid(String inputText) {        InputDialogInterface.FilterResult filterResult = new InputDialogInterface.FilterResult();        if (TextUtils.isEmpty(inputText)) {            filterResult.result = false;            filterResult.errorHint = "请输入用户号";        } else if (isContainIllegalChar(inputText)) {            filterResult.result = false;            filterResult.errorHint = "用户号不能包含中文空格等字符";        } else if (inputText.length() < 5 || inputText.length() > 20) {            filterResult.result = false;            filterResult.errorHint = "用户号长度需要5";        } else if (inputText.startsWith("g")) {            filterResult.result = false;            filterResult.errorHint = "用户号不能以g开头";        } else {            filterResult.result = true;        }        return filterResult;    }    private boolean isContainIllegalChar(String str) {        char[] ch = str.toCharArray();        for  (char c : ch) {            if (c <= 0x20 || c >= 0x7f) {                return true;            }        }        return false;    }

显示：

addFriendDialog.show(getFragmentManager(), "");

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