自定义dialog简单封装

来源：互联网发布：python命令行编辑：程序博客网时间：2024/06/11 19:29

安卓的dialog有很多种，什么AlertDialog、ProgressDialog、TimePickerDialog等等。虽然谷歌似乎帮我们做了很多封装，但实际应用时却感觉很不好用，比如我不想要title。下面我们就来仿照AlertDialog对我们自定义的dialog进行封装。没有封装的简单自定义点这，封装的好处我就不多说了。首先先看效果图。
这里写图片描述

其次我们把代码直接贴出来!

public class DialogBuilder {    private Context context;    private int themeResId;    private View layout;    private boolean cancelable = true;    private CharSequence title, message, cancelText, sureText;//除了message的所有文本，不写则Gone。    private View.OnClickListener sureClickListener, cancelClickListener;    public DialogBuilder(Context context) {        this(context, R.style.CustomDialog);    }    public DialogBuilder(Context context, int themeResId) {        this(context, themeResId, ((LayoutInflater) context                .getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.custom_dialog_layout, null));    }    //自定义layout用这个    public DialogBuilder(Context context, int themeResId, View layout) {        this.context = context;        this.themeResId = themeResId;        this.layout = layout;    }    //能否返回键取消    public DialogBuilder setCancelable(Boolean cancelable) {        this.cancelable = cancelable;        return this;    }    public DialogBuilder title(CharSequence title) {        this.title = title;        return this;    }    public DialogBuilder message(CharSequence message) {        this.message = message;        return this;    }    public DialogBuilder cancelText(CharSequence str) {        this.cancelText = str;        return this;    }    //确定按钮文本    public DialogBuilder sureText(CharSequence str) {        this.sureText = str;        return this;    }    public DialogBuilder setSureOnClickListener(View.OnClickListener listener) {        this.sureClickListener = listener;        return this;    }    public DialogBuilder setCancelOnClickListener(View.OnClickListener listener) {        this.cancelClickListener = listener;        return this;    }    public Dialog build() {        final Dialog dialog = new Dialog(context, themeResId);        dialog.setCancelable(cancelable);        dialog.addContentView(layout, new ActionBar.LayoutParams(                ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.WRAP_CONTENT));        //设置显不显示        setText(title, R.id.title);        setText(message, R.id.message);        setText(cancelText, R.id.cancel);        setText(sureText, R.id.sure);        if (isValid(cancelText) || isValid(sureText)) {            layout.findViewById(R.id.line2).setVisibility(View.VISIBLE);        }        if (isValid(cancelText) && isValid(sureText)) {            layout.findViewById(R.id.line).setVisibility(View.VISIBLE);        }        //没有title时message变大        if(!isValid(title)){            ((TextView)layout.findViewById(R.id.message)).setTextSize(TypedValue.COMPLEX_UNIT_DIP,16);        }        //一行居中        final TextView textView = (TextView)layout.findViewById(R.id.message);        textView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {            @Override            public boolean onPreDraw() {                if(textView.getLineCount() ==1){                    textView.setGravity(Gravity.CENTER);                }                return true;            }        });        //设置点击监听        if (sureClickListener != null) {            layout.findViewById(R.id.sure).setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    sureClickListener.onClick(view);                    dialog.dismiss();                }            });        }        if (cancelClickListener != null) {            layout.findViewById(R.id.sure).setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View view) {                    cancelClickListener.onClick(view);                    dialog.dismiss();                }            });        }        //设置宽度        WindowManager.LayoutParams params = dialog.getWindow().getAttributes();        params.width = (int) (context.getResources().getDisplayMetrics().widthPixels * 0.80);        dialog.getWindow().setAttributes(params);        return dialog;    }    private void setText(CharSequence text, int id) {        if (isValid(text)) {            TextView textView = (TextView) layout.findViewById(id);            textView.setText(text);            textView.setVisibility(View.VISIBLE);        }    }    private boolean isValid(CharSequence text) {        return text != null && !"".equals(text.toString().trim());    }}

下面是custom_dialog_layout

<?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="wrap_content"    android:background="@android:color/white"    android:orientation="vertical">    <TextView        android:id="@+id/title"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginTop="20dp"        android:ellipsize="end"        android:gravity="center"        android:maxLines="2"        android:textColor="#38ADFF"        android:textSize="16dp"        android:visibility="gone" />    <TextView        android:id="@+id/message"        android:padding="16dp"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:gravity="left"        android:lineSpacingMultiplier="1.2"        android:text="正文"        android:textSize="14dp" />    <View        android:id="@+id/line2"        android:layout_width="fill_parent"        android:layout_height="0.5dp"        android:background="#cccccc"        android:visibility="gone" />    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal">        <TextView            android:id="@+id/cancel"            android:layout_width="0dp"            android:layout_height="44dp"            android:layout_weight="1.0"            android:gravity="center"            android:textColor="#666666"            android:textSize="14dp"            android:visibility="gone" />        <View            android:id="@+id/line"            android:layout_width="0.5dp"            android:layout_height="match_parent"            android:background="#cccccc"            android:visibility="gone" />        <TextView            android:id="@+id/sure"            android:layout_width="0dp"            android:layout_height="44dp"            android:layout_weight="1.0"            android:gravity="center"            android:textColor="#38ADFF"            android:textSize="14dp"            android:visibility="gone" />    </LinearLayout>

style样式CustomDialog

    <style name="CustomDialog" parent="android:style/Theme.Dialog">        <!--你的layout背景颜色及和透明程度-->        <item name="android:windowBackground">@android:color/transparent</item>        <!--是否去除标题 -->        <item name="android:windowNoTitle">true</item>        <!--是否去除边框-->        <item name="android:windowFrame">@null</item>        <!--是否浮现在activity之上-->        <item name="android:windowIsFloating">true</item>        <!--屏幕其他地方是否模糊变黑-->        <item name="android:backgroundDimEnabled">true</item>    </style>

主activity调用

 new DialogBuilder(MainActivity.this)                .title("有标题的")                .message("当两行时左对齐。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。")                .sureText("我知道了")                .setCancelable(false)                .setSureOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View view) {                        new DialogBuilder(MainActivity.this)                                .title("有标题的")                                .message("显示确定和取消两个")                                .cancelText("确定")                                .sureText("取消")                                .setSureOnClickListener(new View.OnClickListener() {                                    @Override                                    public void onClick(View view) {                                        new DialogBuilder(MainActivity.this)                                                .title("有标题的")                                                .message("当只有一行时居中")                                                .build().show();                                    }                                }).build().show();                    }                }).build().show();

好了，就四部分代码。拷过去就能用了

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