本文所用的知识点很简单，但很实用，非喜勿喷

目录

一、通过 AlertDialog ,快速使用自定义Dialog 。

二、自定义AlertDialog的宽度

三、DialogFragment 创建对话框

重点：AlertDialog 要在主线程才可以显示/隐藏。但DialogFragment可以在子线程中显示 /隐藏

正文：

一、通过 AlertDialog ,快速使用自定义Dialog 。

包含输入框。（等待框，普通的消息展示dialog道理相同。一般一个项目写三个通用的Dialog：等待框，普通的消息，包含输入框）

1、使用方法

MyDialogInputBuilder builder=new MyDialogInputBuilder(this);
//注意方法 setCancelable ：alertDialog是否可以点击外围消失
builder.setTitle("title").setMessage("message").setCancelable(false);
builder.setPositiveButton("确认", new MyDialogInputBuilder.MyInputOnClickListener() {
    @Override
    public void onClick(DialogInterface dialog,String str) {
        //String str 的值为用户输入的值
        Log.w("test","PositiveButton onClick");
        Toast.makeText(LoginActivity.this,"点击了确认按钮 str="+str,Toast.LENGTH_SHORT).show();
        dialog.dismiss();
    }
});
builder.setNegativeButton("cancle", null);
alertDialog = builder.create();
alertDialog.show();

2、原码

public class MyDialogInputBuilder {
    private Context context;
    private String title;
    private String message;
    private String strPositive;
    private String strNegative;
    private MyInputOnClickListener positivelistener;
    private MyInputOnClickListener negativelistener;

    private boolean mCancelable = true;

    public MyDialogInputBuilder(Context context) {
        this.context=context;
        deleteDate();
    }
    private void deleteDate(){
        title=null;
        message=null;
        strPositive=null;
        strNegative=null;
        positivelistener=null;
        negativelistener=null;
    }
    public MyDialogInputBuilder setTitle(String title) {
        this.title = title;
        return this;
    }
    public MyDialogInputBuilder setMessage(String message) {
        this.message = message;
        return this;
    }

    /**
     * alertDialog是否可以点击外围消失
     * @param cancelable true 表示可以消失
     * @return
     */
    public MyDialogInputBuilder setCancelable(boolean cancelable) {
        this.mCancelable = cancelable;
        return this;
    }
    public MyDialogInputBuilder setPositiveButton(String text, MyInputOnClickListener listener) {
        this.strPositive = text;
        this.positivelistener = listener;
        return this;
    }
    public MyDialogInputBuilder setNegativeButton(String text, MyInputOnClickListener listener) {
        this.strNegative = text;
        this.negativelistener = listener;
        return this;
    }

    private EditText inputText;
    public AlertDialog create() {
        AlertDialog.Builder builder=new AlertDialog.Builder(this.context);
        View mView = LayoutInflater.from(this.context).inflate(R.layout.common_dialog_input, null);
        TextView tvTitle = (TextView)mView.findViewById(R.id.common_dialog_input_tips_titile);
        inputText = (EditText)mView.findViewById(R.id.common_dialog_input_tips_input);
        Button btnPositive =(Button) mView.findViewById(R.id.common_dialog_input_tips_btn_yes);
        Button btnNegative =(Button) mView.findViewById(R.id.common_dialog_input_tips_btn_no);
        if(isEmpty(title)){
            tvTitle.setVisibility(View.GONE);
        }else{
            tvTitle.setVisibility(View.VISIBLE);
            tvTitle.setText(title.trim());
        }
        if (isEmpty(strPositive)) {
            btnPositive.setVisibility(View.GONE);
        } else {
            btnPositive.setText(strPositive.trim());
        }
        if (isEmpty(strNegative)) {
            btnNegative.setVisibility(View.GONE);
        } else {
            btnNegative.setText(strNegative.trim());
        }
        inputText.setHint(message.trim());
        //tvMessage.setText(message.trim());
        builder.setView(mView).setCancelable(mCancelable);
        final AlertDialog dialog=builder.create();
        dialog.setCancelable(mCancelable);
        if (mCancelable) {
            dialog.setCanceledOnTouchOutside(true);
        }
        if(!isEmpty(strPositive) && positivelistener==null){
            btnPositive.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    dialog.dismiss();
                }
            });
        }else if(!isEmpty(strPositive) && positivelistener!=null){
            btnPositive.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    positivelistener.onClick(dialog,inputText.getText().toString());
                }
            });
        }
        if(!isEmpty(strNegative) && negativelistener==null){
            btnNegative.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    dialog.dismiss();
                }
            });
        }else if(!isEmpty(strNegative) && negativelistener!=null){
            btnNegative.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    negativelistener.onClick(dialog,inputText.getText().toString());
                }
            });
        }
        return dialog;
    }

    private  boolean isEmpty(String str){
        if (str==null || str.trim().equals("")){
            return true;
        }else{
            return false;
        }
    }

    public interface MyInputOnClickListener{
        void onClick(DialogInterface dialog,String inputStr);
    }
}

布局

<?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="match_parent"
    android:layout_gravity="center"
    android:background="@drawable/common_dialog_bg"
    android:orientation="vertical"
    >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="15dp"
        android:layout_marginBottom="10dp"
        android:gravity="center"
        >
        <ImageView
            android:id="@+id/common_dialog_input_tips_title_icon"
            android:layout_width="25dp"
            android:layout_height="25dp"
            android:src="@android:drawable/ic_dialog_info"
            />

        <TextView
            android:id="@+id/common_dialog_input_tips_titile"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:text="温馨提示"
            android:textColor="@android:color/white"
            android:textSize="18dp" />

    </LinearLayout>


    <TextView
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:background="@android:color/darker_gray" />

    <EditText
        android:id="@+id/common_dialog_input_tips_input"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="10dp"
        android:layout_marginRight="20dp"
        android:layout_marginBottom="10dp"
        android:gravity="left"
        android:textColor="@android:color/white"
        android:textSize="16dp"
        />
   

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="10dp"
        android:layout_marginRight="20dp"
        android:layout_marginLeft="20dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/common_dialog_input_tips_btn_no"
            android:layout_width="0dp"
            android:layout_height="30dp"
            android:layout_marginRight="7dp"
            android:layout_weight="1"
            android:background="@android:color/holo_green_dark"
            android:gravity="center"
            android:text="否"
            android:textColor="@android:color/white" />


        <Button
            android:id="@+id/common_dialog_input_tips_btn_transfer"
            android:layout_width="0dp"
            android:layout_height="30dp"
            android:layout_weight="1"
            android:background="@android:color/holo_blue_dark"
            android:gravity="center"
            android:text="转移"
            android:textColor="@android:color/white"
            android:visibility="gone"
        />

        <Button
            android:id="@+id/common_dialog_input_tips_btn_yes"
            android:layout_width="0dp"
            android:layout_height="30dp"
            android:layout_marginLeft="7dip"
            android:layout_weight="1"
            android:background="@android:color/holo_red_dark"
            android:gravity="center"
            android:text="是"
            android:textColor="@android:color/white" />

        <!-- android:background="@android:color/holo_red_dark"-->

    </LinearLayout>


</LinearLayout>

 

二、自定义AlertDialog的宽度

1、方法1 alertDialog.getWindow().setAttributes(LayoutParams );

if (window != null) {
    window.getDecorView().setPadding(0, 0, 0, 0);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        window.getDecorView().setBackground(context.getResources().getDrawable(res));
    }
   int width=0;
   if(context instanceof Activity){
       WindowManager manager = ((Activity)context).getWindowManager();
       Display defaultDisplay = manager.getDefaultDisplay();
       Point point = new Point();
       defaultDisplay.getSize(point);
       //int x = point.x;
       width=point.x * 5 / 6;
   }else{
       width= Tools.dipTopx(context,300);
   }
    android.view.WindowManager.LayoutParams lp = alertDialog.getWindow()
            .getAttributes();
    lp.gravity = Gravity.CENTER;
    lp.width = width;
    lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
    alertDialog.getWindow().setAttributes(lp);
    alertDialog.setCancelable(touchCancel);
    alertDialog.setCanceledOnTouchOutside(touchCancel);
    window.setWindowAnimations(R.style.alertDialogStyle01);
}

2、方法2 。

 dialog.getWindow().setLayout(DensityUtil.dip2px(context,300), LinearLayout.LayoutParams.WRAP_CONTENT);

DensityUtil.dip2px是dp转px的工具类