Android仿IOS自定义AlertDialog提示框

本文介绍的仿IOS对话框的实现，先来看一下效果图

具体代码如下：

public class AlertDialog {
private Context context;
private Dialog dialog;
private LinearLayout lLayout_bg;
private TextView txt_title;
private TextView txt_msg;
private Button btn_neg;
private Button btn_pos;
private ImageView img_line;
private Display display;
private boolean showTitle = false;
private boolean showMsg = false;
private boolean showPosBtn = false;
private boolean showNegBtn = false;

public AlertDialog(Context context) {
 this.context = context;
 WindowManager windowManager = (WindowManager) context
   .getSystemService(Context.WINDOW_SERVICE);
 display = windowManager.getDefaultDisplay();
}

public AlertDialog builder() {
 View view = LayoutInflater.from(context).inflate(
   R.layout.view_alertdialog, null);

lLayout_bg = (LinearLayout) view.findViewById(R.id.lLayout_bg);
 txt_title = (TextView) view.findViewById(R.id.txt_title);
 txt_title.setVisibility(View.GONE);
 txt_msg = (TextView) view.findViewById(R.id.txt_msg);
 txt_msg.setVisibility(View.GONE);
 btn_neg = (Button) view.findViewById(R.id.btn_neg);
 btn_neg.setVisibility(View.GONE);
 btn_pos = (Button) view.findViewById(R.id.btn_pos);
 btn_pos.setVisibility(View.GONE);
 img_line = (ImageView) view.findViewById(R.id.img_line);
 img_line.setVisibility(View.GONE);

dialog = new Dialog(context, R.style.AlertDialogStyle);
 dialog.setContentView(view);

lLayout_bg.setLayoutParams(new FrameLayout.LayoutParams((int) (display
   .getWidth() * 0.80), LayoutParams.WRAP_CONTENT));

return this;
}

public AlertDialog setTitle(String title) {
 showTitle = true;
 if ("".equals(title)) {
  txt_title.setText("标题");
 } else {
  txt_title.setText(title);
 }
 return this;
}

public AlertDialog setMsg(String msg) {
 showMsg = true;
 if ("".equals(msg)) {
  txt_msg.setText("内容");
 } else {
  txt_msg.setText(msg);
 }
 return this;
}

public AlertDialog setCancelable(boolean cancel) {
 dialog.setCancelable(cancel);
 return this;
}

public AlertDialog setPositiveButton(String text,
  final OnClickListener listener) {
 showPosBtn = true;
 if ("".equals(text)) {
  btn_pos.setText("确定");
 } else {
  btn_pos.setText(text);
 }
 btn_pos.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
   listener.onClick(v);
   dialog.dismiss();
  }
 });
 return this;
}

public AlertDialog setNegativeButton(String text,
  final OnClickListener listener) {
 showNegBtn = true;
 if ("".equals(text)) {
  btn_neg.setText("取消");
 } else {
  btn_neg.setText(text);
 }
 btn_neg.setOnClickListener(new OnClickListener() {
  @Override
  public void onClick(View v) {
   listener.onClick(v);
   dialog.dismiss();
  }
 });
 return this;
}

private void setLayout() {
 if (!showTitle && !showMsg) {
  txt_title.setText("提示");
  txt_title.setVisibility(View.VISIBLE);
 }

if (showTitle) {
  txt_title.setVisibility(View.VISIBLE);
 }

if (showMsg) {
  txt_msg.setVisibility(View.VISIBLE);
 }

if (!showPosBtn && !showNegBtn) {
  btn_pos.setText("确定");
  btn_pos.setVisibility(View.VISIBLE);
//   btn_pos.setBackgroundResource(R.drawable.alertdialog_single_selector);
  btn_pos.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    dialog.dismiss();
   }
  });
 }

if (showPosBtn && showNegBtn) {
  btn_pos.setVisibility(View.VISIBLE);
//   btn_pos.setBackgroundResource(R.drawable.alertdialog_right_selector);
  btn_neg.setVisibility(View.VISIBLE);
//   btn_neg.setBackgroundResource(R.drawable.alertdialog_left_selector);
  img_line.setVisibility(View.VISIBLE);
 }

if (showPosBtn && !showNegBtn) {
  btn_pos.setVisibility(View.VISIBLE);
//   btn_pos.setBackgroundResource(R.drawable.alertdialog_single_selector);
 }

if (!showPosBtn && showNegBtn) {
  btn_neg.setVisibility(View.VISIBLE);
//   btn_neg.setBackgroundResource(R.drawable.alertdialog_single_selector);
 }
}

public void show() {
 setLayout();
 dialog.show();
}
}

布局文件view_alertdialog.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/lLayout_bg"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/alert_bg"
android:orientation="vertical" >

<TextView
 android:id="@+id/txt_title"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_marginLeft="15dp"
 android:layout_marginRight="15dp"
 android:layout_marginTop="15dp"
 android:gravity="center"
 android:textColor="@color/black"
 android:textSize="18sp"
 android:text="提示"
 android:textStyle="bold" />

<TextView
 android:id="@+id/txt_msg"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_marginLeft="15dp"
 android:layout_marginRight="15dp"
 android:layout_marginTop="32dp"
 android:gravity="center"
 android:text="提示信息"
 android:textColor="@color/black"
 android:textSize="16sp" />

<ImageView
 android:layout_width="match_parent"
 android:layout_height="0.5dp"
 android:layout_marginTop="25dp"
 android:background="@color/alertdialog_line" />

<LinearLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal" >

<Button
  android:id="@+id/btn_neg"
  android:layout_width="wrap_content"
  android:layout_height="43dp"
  android:layout_weight="1"
  android:background="@drawable/alertdialog_left_selector"
  android:gravity="center"
  android:textColor="@color/actionsheet_blue"
  android:textSize="16sp"
  />

<ImageView
  android:id="@+id/img_line"
  android:layout_width="0.5dp"
  android:layout_height="43dp"
  android:background="@color/alertdialog_line" />

<Button
  android:id="@+id/btn_pos"
  android:layout_width="wrap_content"
  android:layout_height="43dp"
  android:layout_weight="1"
  android:background="@drawable/alertdialog_right_selector"
  android:gravity="center"
  android:textColor="@color/actionsheet_blue"
  android:textSize="16sp"
  android:textStyle="bold"
  />
</LinearLayout>

</LinearLayout>

alertdialog_left_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/alert_btn_left_pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/trans_bg"/>

</selector>

alertdialog_right_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/alert_btn_right_pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/trans_bg"/>

</selector>

alertdialog_single_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:drawable="@drawable/alert_btn_single_pressed" android:state_pressed="true"/>
<item android:drawable="@drawable/trans_bg"/>

</selector>
<style name="AlertDialogStyle" parent="@android:style/Theme.Dialog">
 <item name="android:windowBackground">@android:color/transparent</item>
 <item name="android:windowContentOverlay">@null</item>
 <item name="android:windowIsFloating">true</item>
 <item name="android:windowFrame">@null</item>
 <item name="android:backgroundDimEnabled">true</item>
 <item name="android:windowNoTitle">true</item>
 <item name="android:windowIsTranslucent">true</item>
</style>

用到的.9图片

调用方式：

 new AlertDialog(this).builder().setMsg(msg)
 .setPositiveButton("确定", new OnClickListener() {
  @Override
  public void onClick(View v) {

}
 }).setNegativeButton("取消", new OnClickListener() {

@Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
  }
 }).show();

来源：http://www.jianshu.com/p/33ab1c112be6