它们的定义AlertDialog(二)_ide

先来看主页面布局

main_activity.xml里面仅仅有一个button(加入点击事件。弹出载入框)

再看MainActivity

package com.example.loadingdialog;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity{
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.main_activity);
    findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {

      @Override
      public void onClick(View v) {
        LoadingDialog loadingDialog = new LoadingDialog(MainActivity.this);
        loadingDialog.setCancelable(false);
        loadingDialog.show();
      }
    });
  }
}


看载入框的布局文件

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="正在载入"
                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（里面有具体的凝视）

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,载入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，来添加+1
   */
  private Handler handler = new Handler(){
    //正在载入的原点数量
    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() {
      @Override
      public 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);
    // 设置动画反复次数
    mAnim.setRepeatCount(Animation.INFINITE);
    //动画反复的模式--运行完第一次动画之后。回到动画開始然后运行第二次动画
    mAnim.setRepeatMode(Animation.RESTART);
    mAnim.setStartTime(Animation.START_ON_FIRST_FRAME);
  }

  @Override
  public void show() {
    iv_route.startAnimation(mAnim);
    handler.sendEmptyMessage(CHANGE_TITLE_WHAT);
    super.show();
  }

  @Override
  public void dismiss() {
    mAnim.cancel();
    super.dismiss();
  }


  @Override
  public 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文件里

<?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（载入框之外是暗色）

<?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>