import android.support.v4.app.DialogFragment;

import android.text.Editable;

import android.text.TextWatcher;

import android.view.Gravity;

import android.view.View;

import android.view.Window;

    private static final String TAG = "CommonDialogFragment";

    private static final String ARG_COMMENT = "comment";

    private static final String ARG_TYPE = "type";

    private Dialog dialogFragment;

    private String type;

    private ConstraintLayout countInfo;

    private TextView count;

        CommonDialogFragment dialogFragment = new CommonDialogFragment();

        Bundle args = new Bundle();

        args.putString(ARG_COMMENT, comment);

        args.putString(ARG_TYPE, type);

        dialogFragment.setArguments(args);

        return dialogFragment;

    @Override

    public Dialog onCreateDialog(Bundle savedInstanceState) {

        final String comment = getArguments().getString(ARG_COMMENT);

        dialogFragment = new Dialog(getActivity(), R.style.BottomDialog);

        // 外部点击设置为可取消

        dialogFragment.setCancelable(true);

        editText.setText(comment);

        editText.setSelection(comment.length());

        updateView(comment);

        send.setOnClickListener(new View.OnClickListener() {

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    tools:background="#424242">

        android:layout_width="wrap_content"

        android:layout_height="42dp"

        android:paddingLeft="29dp"

        app:layout_constraintBottom_toBottomOf="parent"

        app:layout_constraintTop_toBottomOf="@+id/content"

        tools:background="#06648f">