自定义AlertDialog(二)

先来看主页面布局

main_activity.xml里面只有一个button(添加点击事件，弹出加载框)

再看MainActivity

package com.example.loadingdialog;import android.app.Activity;import android.os.Bundle;import android.view.View;public class MainActivity extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main_activity);findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {LoadingDialog loadingDialog = new LoadingDialog(MainActivity.this);loadingDialog.setCancelable(false);loadingDialog.show();}});}}

看加载框的布局文件

activity_custom_loding_dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:gravity="center" >    <LinearLayout        android:layout_width="220dp"        android:layout_height="220dp"        android:layout_gravity="center"        android:background="@drawable/dialog_bocop_loaing_bg"        android:orientation="vertical" >        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="0dp"            android:layout_weight="2"            android:gravity="center" >            <ImageView                android:id="@+id/iv_route"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerHorizontal="true"                android:layout_centerVertical="true"                android:background="@drawable/dialog_bocop_loading_rotate_anim_img" />        </RelativeLayout>        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="0dp"            android:layout_marginBottom="10dp"            android:layout_marginLeft="10dp"            android:layout_marginRight="10dp"            android:layout_weight="1"            android:gravity="center_horizontal" >            <TextView                android:id="@+id/tv"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_toLeftOf="@+id/tv_point"                android:ellipsize="marquee"                android:gravity="center"                android:singleLine="true"                android:text="正在加载"                android:textColor="#6F6868"                android:textSize="20sp" />            <TextView                android:id="@+id/tv_point"                android:layout_width="20dp"                android:layout_height="wrap_content"                android:layout_alignParentRight="true"                android:text="..."                android:textColor="#6F6868"                android:textSize="20sp" />        </RelativeLayout>    </LinearLayout></LinearLayout>

LoadingDialog（里面有详细的注释）

package com.example.loadingdialog;import android.app.Dialog;import android.content.Context;import android.os.Handler;import android.view.View;import android.view.animation.Animation;import android.view.animation.RotateAnimation;import android.widget.ImageView;import android.widget.TextView;public class LoadingDialog extends Dialog {private static final int CHANGE_TITLE_WHAT = 1;private static final int CHNAGE_TITLE_DELAYMILLIS = 300;private static final int MAX_SUFFIX_NUMBER = 3;private static final char SUFFIX = '.';private ImageView iv_route;private TextView tv;private TextView tv_point;private RotateAnimation mAnim;private boolean cancelable = true;/** * 定义一个handler,加载就发送一个即时消息，让原点+1,继而在每隔300毫秒发送一个延迟消息，来增加+1 */private Handler handler = new Handler(){//正在加载的原点数量private int num = 0;public void handleMessage(android.os.Message msg) {if (msg.what == CHANGE_TITLE_WHAT) {StringBuilder builder = new StringBuilder();if (num >= MAX_SUFFIX_NUMBER) {num = 0;}num ++;for (int i = 0;i < num;i++) {builder.append(SUFFIX);}tv_point.setText(builder.toString());if (isShowing()) {handler.sendEmptyMessageDelayed(CHANGE_TITLE_WHAT, CHNAGE_TITLE_DELAYMILLIS);} else {num = 0;}}};};public LoadingDialog(Context context) {super(context, R.style.Dialog_bocop);init();}private void init() {View contentView = View.inflate(getContext(), R.layout.activity_custom_loding_dialog_layout, null);setContentView(contentView);contentView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {if (cancelable) {dismiss();}}});iv_route = (ImageView) findViewById(R.id.iv_route);tv = (TextView) findViewById(R.id.tv);tv_point = (TextView) findViewById(R.id.tv_point);/**动画初始化*/initAnim();//背景暗色getWindow().setWindowAnimations(R.anim.alpha_in);}private void initAnim() {mAnim = new RotateAnimation(360, 0,Animation.RESTART, 0.5f, Animation.RESTART,0.5f);mAnim.setDuration(2000);// 设置动画重复次数mAnim.setRepeatCount(Animation.INFINITE);//动画重复的模式--执行完第一次动画之后，回到动画开始然后执行第二次动画mAnim.setRepeatMode(Animation.RESTART);mAnim.setStartTime(Animation.START_ON_FIRST_FRAME);}@Overridepublic void show() {iv_route.startAnimation(mAnim);handler.sendEmptyMessage(CHANGE_TITLE_WHAT);super.show();}@Overridepublic void dismiss() {mAnim.cancel();super.dismiss();}@Overridepublic void setCancelable(boolean flag) {cancelable = flag;super.setCancelable(flag);}}

再看super(context, R.style.Dialog_bocop);

背景色，无标题属性

<style name="Dialog_bocop">        <item name="android:windowBackground">@color/bocop_dialog_bg</item>        <item name="android:windowNoTitle">true</item>        <item name="android:windowIsTranslucent">true</item>        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>    </style>

在color.xml文件中

<?xml version="1.0" encoding="utf-8"?><resources>    <color name="bocop_dialog_bg">#77000000</color></resources><!-- window背景色 -->

接下来看这个getWindow().setWindowAnimations(R.anim.alpha_in);

alpha_in.xml（加载框之外是暗色）

<?xml version="1.0" encoding="utf-8"?><alpha xmlns:android="http://schemas.android.com/apk/res/android"    android:duration="1000"    android:fromAlpha="1.0"    android:toAlpha="0.0" ></alpha>