目的:为了app中有统一的弹窗显示
1.代码

  public class CustomDialog extends AlertDialog{
    private Button mBtnOk;
    private Button mBtnCancel;
    private TextView tvTitle;
    private TextView tvContent;
    protected CustomDialog(Context context) {
        super(context);
    }

    protected CustomDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {
        super(context, cancelable, cancelListener);
    }

    protected CustomDialog(Context context, int themeResId) {
        super(context, themeResId);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if(getWindow()!=null){
            getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
        }
        setContentView(R.layout.customdialog);
        initView();
    }
    private void initView() {
        mBtnOk = (Button) findViewById(R.id.ok);
        mBtnCancel = (Button) findViewById(R.id.cancel);
        tvTitle = (TextView) findViewById(R.id.dialog_title);
        tvContent = (TextView) findViewById(R.id.dialog_content);

    }
    public void setTexts(CharSequence title,CharSequence content,CharSequence ok,CharSequence cancle){
        //标题和内容有一个为空，则在内容区显示
        if(TextUtils.isEmpty(title)||TextUtils.isEmpty(content)){
            tvTitle.setVisibility(View.GONE);
            tvContent.setText(TextUtils.isEmpty(title)?content:title);
        }else{
            tvTitle.setText(title);
            tvContent.setText(content);
        }
        if(TextUtils.isEmpty(ok)||TextUtils.isEmpty(cancle)){
            mBtnCancel.setVisibility(View.GONE);
            mBtnOk.setText(TextUtils.isEmpty(ok)?cancle:ok);
        }else{
            mBtnOk.setText(ok);
            mBtnCancel.setText(cancle);
        }
    }
    public void setListeners(final OnClickListener positiveListener,
                             final OnClickListener negativeListener){
            mBtnOk.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(positiveListener!=null) {
                        dismiss();
                        positiveListener.onClick(CustomDialog.this, 1);
                    }else{
                        dismiss();
                    }
                }
            });
            mBtnCancel.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (negativeListener != null) {
                        negativeListener.onClick(CustomDialog.this,2);
                        dismiss();
                    }else{
                        dismiss();
                    }
                }
            });
    }
    public void setCanOutSide(boolean isCanTouchOutSize){
        setCanceledOnTouchOutside(isCanTouchOutSize);
    }
    public void setKeyBack(final boolean flag){
        setOnKeyListener(new OnKeyListener() {
            @Override
            public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
                return flag;
            }
        });
    }

}

2.布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/transparent">

    <LinearLayout
        android:layout_width="270dp"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="@drawable/update_backgroud"
        android:gravity="center_horizontal"
        android:minHeight="180dp"
        android:orientation="vertical"
        android:visibility="visible">
        <!--标题-->
        <TextView
            android:id="@+id/dialog_title"
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:gravity="center"
            android:visibility="visible"
            android:textSize="17sp"
            android:textColor="@android:color/holo_orange_light" />

        <!--内容-->
        <TextView
            android:id="@+id/dialog_content"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:gravity="center"
            android:padding="22dp"
            android:textColor="@android:color/black"
            android:textSize="15sp" />

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

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="45dp"
            android:orientation="horizontal"
            android:showDividers="middle"
            android:divider="@drawable/divier">
            <Button
                android:id="@+id/cancel"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@null"
                android:textSize="17sp"
                android:visibility="visible"
                android:textColor="#dedede" />
            <Button
                android:id="@+id/ok"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@null"
                android:textSize="17sp"
                android:textColor="@android:color/holo_orange_dark" />
        </LinearLayout>
    </LinearLayout>
</RelativeLayout>

3.封装使用

public class TipsUtils {
    /**
     *
     * @param activity
     * @param title 标题
     * @param content 内容
     * @param positiveListener 确定按钮点击监听
     * @param negativeListener 取消按钮点击监听
     * @param positiveText 确定按钮
     * @param negativeText 取消按钮
     * @param touchOutside 点击弹窗外部弹窗是否消失
     */
    public static void showDialog(Activity activity, CharSequence title
            , CharSequence content, OnClickListener positiveListener,
                                 OnClickListener negativeListener,
                                  CharSequence positiveText, CharSequence negativeText,
                                  boolean touchOutside) {
        if (activity != null && !activity.isFinishing()) {
            CustomDialog dialog = new CustomDialog(activity, touchOutside, null);
            dialog.show();
            dialog.setTexts(title, content, positiveText, negativeText);
            dialog.setListeners(positiveListener, negativeListener);
            dialog.setCanOutSide(touchOutside);
            if(!touchOutside) {
                dialog.setCancelable(touchOutside);
            }
        }
    }

    /**
     * 只展示内容，没有标题,只有一个确定按钮
     * 点击外部弹窗可消失
     * @param content
     */
    public static void showDialog(Activity activity,CharSequence content){
        showDialog(activity,"",content,null,null,"确定","",true);
    }

    /**
     * 只展示内容和标题,只有一个确定按钮
     * @param activity
     * @param titile
     * @param content
     */
    public static void showDialog(Activity activity,CharSequence titile,CharSequence content){
        showDialog(activity,titile,content,null,null,"确定","",true);
    }

    /**
     *
     * @param activity
     * @param content
     * @param close 关闭当前activity
     */
    public static void showDialog(final Activity activity, CharSequence content, final boolean close){
        showDialog(activity, "", content, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                if(close) {
                    activity.finish();
                }
            }
        }, null, "确定", "", true);
    }
   

   TipsUtils.showDialog(this,"内容");
   TipsUtils.showDialog(this,"标题","内容");